Mercurial > vim
annotate src/crypt.c @ 29850:8b4ccf6cd843
Added tag v9.0.0263 for changeset 6c7eddcce52c183f3d2715c90a4b272397ff12f9
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Thu, 25 Aug 2022 16:15:04 +0200 |
| parents | a74398c432a4 |
| children | 540e85ac14c9 |
| rev | line source |
|---|---|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 6122 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 | |
| 10 /* | |
| 11 * crypt.c: Generic encryption support. | |
| 12 */ | |
| 13 #include "vim.h" | |
| 14 | |
| 15 #if defined(FEAT_CRYPT) || defined(PROTO) | |
| 16 /* | |
| 17 * Optional encryption support. | |
| 18 * Mohsin Ahmed, mosh@sasi.com, 1998-09-24 | |
| 19 * Based on zip/crypt sources. | |
| 20 * Refactored by David Leadbeater, 2014. | |
| 21 * | |
| 22 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to | |
| 23 * most countries. There are a few exceptions, but that still should not be a | |
| 24 * problem since this code was originally created in Europe and India. | |
| 25 * | |
| 26 * Blowfish addition originally made by Mohsin Ahmed, | |
| 27 * http://www.cs.albany.edu/~mosh 2010-03-14 | |
| 28 * Based on blowfish by Bruce Schneier (http://www.schneier.com/blowfish.html) | |
| 29 * and sha256 by Christophe Devine. | |
| 30 */ | |
| 31 | |
| 32 typedef struct { | |
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33 char *name; // encryption name as used in 'cryptmethod' |
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34 char *magic; // magic bytes stored in file header |
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35 int salt_len; // length of salt, or 0 when not using salt |
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36 int seed_len; // length of seed, or 0 when not using seed |
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37 #ifdef CRYPT_NOT_INPLACE |
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38 int works_inplace; // encryption/decryption can be done in-place |
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39 #endif |
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40 int whole_undofile; // whole undo file is encrypted |
| 6122 | 41 |
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42 // Optional function pointer for a self-test. |
| 6122 | 43 int (* self_test_fn)(); |
| 44 | |
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45 // Function pointer for initializing encryption/decryption. |
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46 int (* init_fn)(cryptstate_T *state, char_u *key, |
| 6122 | 47 char_u *salt, int salt_len, char_u *seed, int seed_len); |
| 48 | |
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49 // Function pointers for encoding/decoding from one buffer into another. |
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50 // Optional, however, these or the _buffer ones should be configured. |
| 6122 | 51 void (*encode_fn)(cryptstate_T *state, char_u *from, size_t len, |
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52 char_u *to, int last); |
| 6122 | 53 void (*decode_fn)(cryptstate_T *state, char_u *from, size_t len, |
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54 char_u *to, int last); |
| 6122 | 55 |
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56 // Function pointers for encoding and decoding, can buffer data if needed. |
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57 // Optional (however, these or the above should be configured). |
| 6122 | 58 long (*encode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len, |
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59 char_u **newptr, int last); |
| 6122 | 60 long (*decode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len, |
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61 char_u **newptr, int last); |
| 6122 | 62 |
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63 // Function pointers for in-place encoding and decoding, used for |
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64 // crypt_*_inplace(). "from" and "to" arguments will be equal. |
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65 // These may be the same as decode_fn and encode_fn above, however an |
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66 // algorithm may implement them in a way that is not interchangeable with |
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67 // the crypt_(en|de)code() interface (for example because it wishes to add |
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68 // padding to files). |
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69 // This method is used for swap and undo files which have a rigid format. |
| 6122 | 70 void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len, |
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71 char_u *p2, int last); |
| 6122 | 72 void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len, |
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73 char_u *p2, int last); |
| 6122 | 74 } cryptmethod_T; |
| 75 | |
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76 static int crypt_sodium_init(cryptstate_T *state, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len); |
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77 static long crypt_sodium_buffer_decode(cryptstate_T *state, char_u *from, size_t len, char_u **buf_out, int last); |
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78 static long crypt_sodium_buffer_encode(cryptstate_T *state, char_u *from, size_t len, char_u **buf_out, int last); |
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79 |
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80 // index is method_nr of cryptstate_T, CRYPT_M_* |
| 6122 | 81 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = { |
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82 // PK_Zip; very weak |
| 6122 | 83 { |
| 84 "zip", | |
| 85 "VimCrypt~01!", | |
| 86 0, | |
| 87 0, | |
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88 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 89 TRUE, |
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90 #endif |
| 6122 | 91 FALSE, |
| 92 NULL, | |
| 93 crypt_zip_init, | |
| 94 crypt_zip_encode, crypt_zip_decode, | |
| 95 NULL, NULL, | |
| 96 crypt_zip_encode, crypt_zip_decode, | |
| 97 }, | |
| 98 | |
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99 // Blowfish/CFB + SHA-256 custom key derivation; implementation issues. |
| 6122 | 100 { |
| 101 "blowfish", | |
| 102 "VimCrypt~02!", | |
| 103 8, | |
| 104 8, | |
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105 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 106 TRUE, |
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107 #endif |
| 6122 | 108 FALSE, |
| 109 blowfish_self_test, | |
| 110 crypt_blowfish_init, | |
| 111 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 112 NULL, NULL, | |
| 113 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 114 }, | |
| 115 | |
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116 // Blowfish/CFB + SHA-256 custom key derivation; fixed. |
| 6122 | 117 { |
| 118 "blowfish2", | |
| 119 "VimCrypt~03!", | |
| 120 8, | |
| 121 8, | |
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122 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 123 TRUE, |
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124 #endif |
| 6122 | 125 TRUE, |
| 126 blowfish_self_test, | |
| 127 crypt_blowfish_init, | |
| 128 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 129 NULL, NULL, | |
| 130 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 131 }, | |
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132 |
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133 // XChaCha20 using libsodium |
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134 { |
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135 "xchacha20", |
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136 "VimCrypt~04!", |
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137 #ifdef FEAT_SODIUM |
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138 crypto_pwhash_argon2id_SALTBYTES, // 16 |
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139 #else |
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140 16, |
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141 #endif |
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142 8, |
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143 #ifdef CRYPT_NOT_INPLACE |
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144 FALSE, |
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145 #endif |
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146 FALSE, |
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147 NULL, |
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148 crypt_sodium_init, |
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149 NULL, NULL, |
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150 crypt_sodium_buffer_encode, crypt_sodium_buffer_decode, |
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151 NULL, NULL, |
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152 }, |
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153 |
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154 // NOTE: when adding a new method, use some random bytes for the magic key, |
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155 // to avoid that a text file is recognized as encrypted. |
| 6122 | 156 }; |
| 157 | |
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158 #ifdef FEAT_SODIUM |
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159 typedef struct { |
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160 size_t count; |
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161 unsigned char key[crypto_box_SEEDBYTES]; |
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162 // 32, same as crypto_secretstream_xchacha20poly1305_KEYBYTES |
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163 crypto_secretstream_xchacha20poly1305_state |
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164 state; |
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165 } sodium_state_T; |
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166 |
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167 |
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168 # ifdef DYNAMIC_SODIUM |
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169 # ifdef MSWIN |
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170 # define SODIUM_PROC FARPROC |
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171 # define load_dll vimLoadLib |
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172 # define symbol_from_dll GetProcAddress |
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173 # define close_dll FreeLibrary |
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174 # define load_dll_error GetWin32Error |
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175 # else |
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176 # error Dynamic loading of libsodium is not supported for now. |
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177 //# define HINSTANCE void* |
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178 //# define SODIUM_PROC void* |
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179 //# define load_dll(n) dlopen((n), RTLD_LAZY|RTLD_GLOBAL) |
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180 //# define symbol_from_dll dlsym |
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181 //# define close_dll dlclose |
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182 //# define load_dll_error dlerror |
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183 # endif |
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184 |
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185 # define sodium_init load_sodium |
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186 # define sodium_free dll_sodium_free |
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187 # define sodium_malloc dll_sodium_malloc |
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188 # define sodium_memzero dll_sodium_memzero |
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189 # define sodium_mlock dll_sodium_mlock |
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190 # define sodium_munlock dll_sodium_munlock |
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191 # define crypto_secretstream_xchacha20poly1305_init_push \ |
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192 dll_crypto_secretstream_xchacha20poly1305_init_push |
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193 # define crypto_secretstream_xchacha20poly1305_push \ |
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194 dll_crypto_secretstream_xchacha20poly1305_push |
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195 # define crypto_secretstream_xchacha20poly1305_init_pull \ |
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196 dll_crypto_secretstream_xchacha20poly1305_init_pull |
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197 # define crypto_secretstream_xchacha20poly1305_pull \ |
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198 dll_crypto_secretstream_xchacha20poly1305_pull |
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199 # define crypto_pwhash dll_crypto_pwhash |
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200 # define randombytes_buf dll_randombytes_buf |
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201 |
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202 static int (*dll_sodium_init)(void) = NULL; |
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203 static void (*dll_sodium_free)(void *) = NULL; |
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204 static void *(*dll_sodium_malloc)(const size_t) = NULL; |
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205 static void (*dll_sodium_memzero)(void * const, const size_t) = NULL; |
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206 static int (*dll_sodium_mlock)(void * const, const size_t) = NULL; |
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207 static int (*dll_sodium_munlock)(void * const, const size_t) = NULL; |
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208 static int (*dll_crypto_secretstream_xchacha20poly1305_init_push) |
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209 (crypto_secretstream_xchacha20poly1305_state *state, |
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210 unsigned char [], |
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211 const unsigned char []) = NULL; |
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212 static int (*dll_crypto_secretstream_xchacha20poly1305_push) |
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213 (crypto_secretstream_xchacha20poly1305_state *state, |
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214 unsigned char *c, unsigned long long *clen_p, |
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215 const unsigned char *m, unsigned long long mlen, |
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216 const unsigned char *ad, unsigned long long adlen, unsigned char tag) |
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217 = NULL; |
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218 static int (*dll_crypto_secretstream_xchacha20poly1305_init_pull) |
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219 (crypto_secretstream_xchacha20poly1305_state *state, |
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220 const unsigned char [], |
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221 const unsigned char []) = NULL; |
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222 static int (*dll_crypto_secretstream_xchacha20poly1305_pull) |
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223 (crypto_secretstream_xchacha20poly1305_state *state, |
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224 unsigned char *m, unsigned long long *mlen_p, unsigned char *tag_p, |
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225 const unsigned char *c, unsigned long long clen, |
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226 const unsigned char *ad, unsigned long long adlen) = NULL; |
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227 static int (*dll_crypto_pwhash)(unsigned char * const out, |
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228 unsigned long long outlen, |
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229 const char * const passwd, unsigned long long passwdlen, |
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230 const unsigned char * const salt, |
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231 unsigned long long opslimit, size_t memlimit, int alg) |
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232 = NULL; |
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233 static void (*dll_randombytes_buf)(void * const buf, const size_t size); |
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234 |
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235 static struct { |
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236 const char *name; |
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237 SODIUM_PROC *ptr; |
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238 } sodium_funcname_table[] = { |
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239 {"sodium_init", (SODIUM_PROC*)&dll_sodium_init}, |
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240 {"sodium_free", (SODIUM_PROC*)&dll_sodium_free}, |
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241 {"sodium_malloc", (SODIUM_PROC*)&dll_sodium_malloc}, |
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242 {"sodium_memzero", (SODIUM_PROC*)&dll_sodium_memzero}, |
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243 {"sodium_mlock", (SODIUM_PROC*)&dll_sodium_mlock}, |
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244 {"sodium_munlock", (SODIUM_PROC*)&dll_sodium_munlock}, |
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245 {"crypto_secretstream_xchacha20poly1305_init_push", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_init_push}, |
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246 {"crypto_secretstream_xchacha20poly1305_push", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_push}, |
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247 {"crypto_secretstream_xchacha20poly1305_init_pull", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_init_pull}, |
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248 {"crypto_secretstream_xchacha20poly1305_pull", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_pull}, |
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249 {"crypto_pwhash", (SODIUM_PROC*)&dll_crypto_pwhash}, |
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250 {"randombytes_buf", (SODIUM_PROC*)&dll_randombytes_buf}, |
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251 {NULL, NULL} |
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252 }; |
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253 |
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254 static int |
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255 sodium_runtime_link_init(int verbose) |
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256 { |
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257 static HINSTANCE hsodium = NULL; |
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258 const char *libname = DYNAMIC_SODIUM_DLL; |
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259 int i; |
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260 |
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261 if (hsodium != NULL) |
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262 return OK; |
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263 |
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264 hsodium = load_dll(libname); |
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265 if (hsodium == NULL) |
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266 { |
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267 if (verbose) |
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268 semsg(_(e_could_not_load_library_str_str), libname, load_dll_error()); |
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269 return FAIL; |
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270 } |
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271 |
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272 for (i = 0; sodium_funcname_table[i].ptr; ++i) |
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273 { |
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274 if ((*sodium_funcname_table[i].ptr = symbol_from_dll(hsodium, |
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275 sodium_funcname_table[i].name)) == NULL) |
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276 { |
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277 close_dll(hsodium); |
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278 hsodium = NULL; |
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279 if (verbose) |
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280 semsg(_(e_could_not_load_library_function_str), sodium_funcname_table[i].name); |
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281 return FAIL; |
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282 } |
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283 } |
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284 return OK; |
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285 } |
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286 |
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287 static int |
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288 load_sodium(void) |
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289 { |
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290 if (sodium_runtime_link_init(TRUE) == FAIL) |
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291 return -1; |
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292 return dll_sodium_init(); |
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293 } |
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294 # endif |
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295 |
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296 # if defined(DYNAMIC_SODIUM) || defined(PROTO) |
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297 int |
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298 sodium_enabled(int verbose) |
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299 { |
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300 return sodium_runtime_link_init(verbose) == OK; |
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301 } |
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302 # endif |
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303 #endif |
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304 |
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305 #define CRYPT_MAGIC_LEN 12 // cannot change |
| 6122 | 306 static char crypt_magic_head[] = "VimCrypt~"; |
| 307 | |
| 308 /* | |
| 309 * Return int value for crypt method name. | |
| 310 * 0 for "zip", the old method. Also for any non-valid value. | |
| 311 * 1 for "blowfish". | |
| 312 * 2 for "blowfish2". | |
| 313 */ | |
| 314 int | |
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315 crypt_method_nr_from_name(char_u *name) |
| 6122 | 316 { |
| 317 int i; | |
| 318 | |
| 319 for (i = 0; i < CRYPT_M_COUNT; ++i) | |
| 320 if (STRCMP(name, cryptmethods[i].name) == 0) | |
| 321 return i; | |
| 322 return 0; | |
| 323 } | |
| 324 | |
| 325 /* | |
| 326 * Get the crypt method used for a file from "ptr[len]", the magic text at the | |
| 327 * start of the file. | |
| 328 * Returns -1 when no encryption used. | |
| 329 */ | |
| 330 int | |
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331 crypt_method_nr_from_magic(char *ptr, int len) |
| 6122 | 332 { |
| 333 int i; | |
| 334 | |
| 335 if (len < CRYPT_MAGIC_LEN) | |
| 336 return -1; | |
| 337 | |
| 338 for (i = 0; i < CRYPT_M_COUNT; i++) | |
| 339 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0) | |
| 340 return i; | |
| 341 | |
| 342 i = (int)STRLEN(crypt_magic_head); | |
| 343 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0) | |
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344 emsg(_(e_file_is_encrypted_with_unknown_method)); |
| 6122 | 345 |
| 346 return -1; | |
| 347 } | |
| 348 | |
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349 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 350 /* |
| 351 * Return TRUE if the crypt method for "method_nr" can be done in-place. | |
| 352 */ | |
| 353 int | |
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354 crypt_works_inplace(cryptstate_T *state) |
| 6122 | 355 { |
| 356 return cryptmethods[state->method_nr].works_inplace; | |
| 357 } | |
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358 #endif |
| 6122 | 359 |
| 360 /* | |
| 361 * Get the crypt method for buffer "buf" as a number. | |
| 362 */ | |
| 363 int | |
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364 crypt_get_method_nr(buf_T *buf) |
| 6122 | 365 { |
| 366 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm); | |
| 367 } | |
| 368 | |
| 369 /* | |
| 370 * Return TRUE when the buffer uses an encryption method that encrypts the | |
| 371 * whole undo file, not only the text. | |
| 372 */ | |
| 373 int | |
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374 crypt_whole_undofile(int method_nr) |
| 6122 | 375 { |
| 376 return cryptmethods[method_nr].whole_undofile; | |
| 377 } | |
| 378 | |
| 379 /* | |
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380 * Get crypt method specific length of the file header in bytes. |
| 6122 | 381 */ |
| 382 int | |
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383 crypt_get_header_len(int method_nr) |
| 6122 | 384 { |
| 385 return CRYPT_MAGIC_LEN | |
| 386 + cryptmethods[method_nr].salt_len | |
| 387 + cryptmethods[method_nr].seed_len; | |
| 388 } | |
| 389 | |
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390 |
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391 #if defined(FEAT_SODIUM) || defined(PROTO) |
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392 /* |
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393 * Get maximum crypt method specific length of the file header in bytes. |
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394 */ |
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395 int |
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396 crypt_get_max_header_len() |
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397 { |
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398 int i; |
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399 int max = 0; |
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400 int temp = 0; |
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401 |
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402 for (i = 0; i < CRYPT_M_COUNT; ++i) |
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403 { |
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404 temp = crypt_get_header_len(i); |
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405 if (temp > max) |
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406 max = temp; |
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407 } |
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408 return max; |
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409 } |
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410 #endif |
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411 |
| 6122 | 412 /* |
| 413 * Set the crypt method for buffer "buf" to "method_nr" using the int value as | |
| 414 * returned by crypt_method_nr_from_name(). | |
| 415 */ | |
| 416 void | |
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417 crypt_set_cm_option(buf_T *buf, int method_nr) |
| 6122 | 418 { |
| 419 free_string_option(buf->b_p_cm); | |
| 420 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name); | |
| 421 } | |
| 422 | |
| 423 /* | |
| 424 * If the crypt method for the current buffer has a self-test, run it and | |
| 425 * return OK/FAIL. | |
| 426 */ | |
| 427 int | |
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428 crypt_self_test(void) |
| 6122 | 429 { |
| 430 int method_nr = crypt_get_method_nr(curbuf); | |
| 431 | |
| 432 if (cryptmethods[method_nr].self_test_fn == NULL) | |
| 433 return OK; | |
| 434 return cryptmethods[method_nr].self_test_fn(); | |
| 435 } | |
| 436 | |
| 437 /* | |
| 438 * Allocate a crypt state and initialize it. | |
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439 * Return NULL for failure. |
| 6122 | 440 */ |
| 441 cryptstate_T * | |
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442 crypt_create( |
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443 int method_nr, |
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444 char_u *key, |
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445 char_u *salt, |
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446 int salt_len, |
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447 char_u *seed, |
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448 int seed_len) |
| 6122 | 449 { |
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450 cryptstate_T *state = ALLOC_ONE(cryptstate_T); |
| 6122 | 451 |
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452 if (state == NULL) |
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453 return state; |
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454 |
| 6122 | 455 state->method_nr = method_nr; |
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456 if (cryptmethods[method_nr].init_fn( |
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457 state, key, salt, salt_len, seed, seed_len) == FAIL) |
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458 { |
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459 vim_free(state); |
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460 return NULL; |
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461 } |
| 6122 | 462 return state; |
| 463 } | |
| 464 | |
| 465 /* | |
| 466 * Allocate a crypt state from a file header and initialize it. | |
| 467 * Assumes that header contains at least the number of bytes that | |
| 468 * crypt_get_header_len() returns for "method_nr". | |
| 469 */ | |
| 470 cryptstate_T * | |
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471 crypt_create_from_header( |
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472 int method_nr, |
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473 char_u *key, |
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474 char_u *header) |
| 6122 | 475 { |
| 476 char_u *salt = NULL; | |
| 477 char_u *seed = NULL; | |
| 478 int salt_len = cryptmethods[method_nr].salt_len; | |
| 479 int seed_len = cryptmethods[method_nr].seed_len; | |
| 480 | |
| 481 if (salt_len > 0) | |
| 482 salt = header + CRYPT_MAGIC_LEN; | |
| 483 if (seed_len > 0) | |
| 484 seed = header + CRYPT_MAGIC_LEN + salt_len; | |
| 485 | |
| 486 return crypt_create(method_nr, key, salt, salt_len, seed, seed_len); | |
| 487 } | |
| 488 | |
| 489 /* | |
| 490 * Read the crypt method specific header data from "fp". | |
| 491 * Return an allocated cryptstate_T or NULL on error. | |
| 492 */ | |
| 493 cryptstate_T * | |
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494 crypt_create_from_file(FILE *fp, char_u *key) |
| 6122 | 495 { |
| 496 int method_nr; | |
| 497 int header_len; | |
| 498 char magic_buffer[CRYPT_MAGIC_LEN]; | |
| 499 char_u *buffer; | |
| 500 cryptstate_T *state; | |
| 501 | |
| 502 if (fread(magic_buffer, CRYPT_MAGIC_LEN, 1, fp) != 1) | |
| 503 return NULL; | |
| 504 method_nr = crypt_method_nr_from_magic(magic_buffer, CRYPT_MAGIC_LEN); | |
| 505 if (method_nr < 0) | |
| 506 return NULL; | |
| 507 | |
| 508 header_len = crypt_get_header_len(method_nr); | |
| 509 if ((buffer = alloc(header_len)) == NULL) | |
| 510 return NULL; | |
| 511 mch_memmove(buffer, magic_buffer, CRYPT_MAGIC_LEN); | |
| 512 if (header_len > CRYPT_MAGIC_LEN | |
| 513 && fread(buffer + CRYPT_MAGIC_LEN, | |
| 514 header_len - CRYPT_MAGIC_LEN, 1, fp) != 1) | |
| 515 { | |
| 516 vim_free(buffer); | |
| 517 return NULL; | |
| 518 } | |
| 519 | |
| 520 state = crypt_create_from_header(method_nr, key, buffer); | |
| 521 vim_free(buffer); | |
| 522 return state; | |
| 523 } | |
| 524 | |
| 525 /* | |
| 526 * Allocate a cryptstate_T for writing and initialize it with "key". | |
| 527 * Allocates and fills in the header and stores it in "header", setting | |
| 528 * "header_len". The header may include salt and seed, depending on | |
| 529 * cryptmethod. Caller must free header. | |
| 530 * Returns the state or NULL on failure. | |
| 531 */ | |
| 532 cryptstate_T * | |
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533 crypt_create_for_writing( |
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534 int method_nr, |
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535 char_u *key, |
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536 char_u **header, |
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537 int *header_len) |
| 6122 | 538 { |
| 539 int len = crypt_get_header_len(method_nr); | |
| 540 char_u *salt = NULL; | |
| 541 char_u *seed = NULL; | |
| 542 int salt_len = cryptmethods[method_nr].salt_len; | |
| 543 int seed_len = cryptmethods[method_nr].seed_len; | |
| 544 cryptstate_T *state; | |
| 545 | |
| 546 *header_len = len; | |
| 547 *header = alloc(len); | |
| 548 if (*header == NULL) | |
| 549 return NULL; | |
| 550 | |
| 551 mch_memmove(*header, cryptmethods[method_nr].magic, CRYPT_MAGIC_LEN); | |
| 552 if (salt_len > 0 || seed_len > 0) | |
| 553 { | |
| 554 if (salt_len > 0) | |
| 555 salt = *header + CRYPT_MAGIC_LEN; | |
| 556 if (seed_len > 0) | |
| 557 seed = *header + CRYPT_MAGIC_LEN + salt_len; | |
| 558 | |
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559 // TODO: Should this be crypt method specific? (Probably not worth |
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560 // it). sha2_seed is pretty bad for large amounts of entropy, so make |
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561 // that into something which is suitable for anything. |
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562 #ifdef FEAT_SODIUM |
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563 if (sodium_init() >= 0) |
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564 { |
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565 if (salt_len > 0) |
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566 randombytes_buf(salt, salt_len); |
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567 if (seed_len > 0) |
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568 randombytes_buf(seed, seed_len); |
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569 } |
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570 else |
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571 #endif |
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572 sha2_seed(salt, salt_len, seed, seed_len); |
| 6122 | 573 } |
| 574 state = crypt_create(method_nr, key, salt, salt_len, seed, seed_len); | |
| 575 if (state == NULL) | |
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576 VIM_CLEAR(*header); |
| 6122 | 577 return state; |
| 578 } | |
| 579 | |
| 580 /* | |
| 581 * Free the crypt state. | |
| 582 */ | |
| 583 void | |
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584 crypt_free_state(cryptstate_T *state) |
| 6122 | 585 { |
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586 #ifdef FEAT_SODIUM |
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587 if (state->method_nr == CRYPT_M_SOD) |
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588 { |
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589 sodium_munlock(((sodium_state_T *)state->method_state)->key, |
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590 crypto_box_SEEDBYTES); |
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591 sodium_memzero(state->method_state, sizeof(sodium_state_T)); |
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592 sodium_free(state->method_state); |
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593 } |
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594 else |
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595 #endif |
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596 vim_free(state->method_state); |
| 6122 | 597 vim_free(state); |
| 598 } | |
| 599 | |
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600 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 601 /* |
| 602 * Encode "from[len]" and store the result in a newly allocated buffer, which | |
| 603 * is stored in "newptr". | |
| 604 * Return number of bytes in "newptr", 0 for need more or -1 on error. | |
| 605 */ | |
| 606 long | |
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607 crypt_encode_alloc( |
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608 cryptstate_T *state, |
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609 char_u *from, |
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610 size_t len, |
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611 char_u **newptr, |
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612 int last) |
| 6122 | 613 { |
| 614 cryptmethod_T *method = &cryptmethods[state->method_nr]; | |
| 615 | |
| 616 if (method->encode_buffer_fn != NULL) | |
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617 // Has buffer function, pass through. |
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618 return method->encode_buffer_fn(state, from, len, newptr, last); |
| 6122 | 619 if (len == 0) |
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620 // Not buffering, just return EOF. |
| 6132 | 621 return (long)len; |
| 6122 | 622 |
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623 *newptr = alloc(len + 50); |
| 6122 | 624 if (*newptr == NULL) |
| 625 return -1; | |
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626 method->encode_fn(state, from, len, *newptr, last); |
| 6132 | 627 return (long)len; |
| 6122 | 628 } |
| 629 | |
| 630 /* | |
| 631 * Decrypt "ptr[len]" and store the result in a newly allocated buffer, which | |
| 632 * is stored in "newptr". | |
| 633 * Return number of bytes in "newptr", 0 for need more or -1 on error. | |
| 634 */ | |
| 635 long | |
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636 crypt_decode_alloc( |
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637 cryptstate_T *state, |
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638 char_u *ptr, |
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639 long len, |
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640 char_u **newptr, |
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641 int last) |
| 6122 | 642 { |
| 643 cryptmethod_T *method = &cryptmethods[state->method_nr]; | |
| 644 | |
| 645 if (method->decode_buffer_fn != NULL) | |
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646 // Has buffer function, pass through. |
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647 return method->decode_buffer_fn(state, ptr, len, newptr, last); |
| 6122 | 648 |
| 649 if (len == 0) | |
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650 // Not buffering, just return EOF. |
| 6122 | 651 return len; |
| 652 | |
| 653 *newptr = alloc(len); | |
| 654 if (*newptr == NULL) | |
| 655 return -1; | |
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656 method->decode_fn(state, ptr, len, *newptr, last); |
| 6122 | 657 return len; |
| 658 } | |
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659 #endif |
| 6122 | 660 |
| 661 /* | |
| 662 * Encrypting "from[len]" into "to[len]". | |
| 663 */ | |
| 664 void | |
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665 crypt_encode( |
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666 cryptstate_T *state, |
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667 char_u *from, |
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668 size_t len, |
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669 char_u *to, |
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670 int last) |
| 6122 | 671 { |
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672 cryptmethods[state->method_nr].encode_fn(state, from, len, to, last); |
| 6122 | 673 } |
| 674 | |
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675 #if 0 // unused |
| 6122 | 676 /* |
| 677 * decrypting "from[len]" into "to[len]". | |
| 678 */ | |
| 679 void | |
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680 crypt_decode( |
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681 cryptstate_T *state, |
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682 char_u *from, |
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683 size_t len, |
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684 char_u *to, |
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685 int last) |
| 6122 | 686 { |
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687 cryptmethods[state->method_nr].decode_fn(state, from, len, to, last); |
| 6122 | 688 } |
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689 #endif |
| 6122 | 690 |
| 691 /* | |
| 692 * Simple inplace encryption, modifies "buf[len]" in place. | |
| 693 */ | |
| 694 void | |
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695 crypt_encode_inplace( |
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696 cryptstate_T *state, |
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697 char_u *buf, |
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698 size_t len, |
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699 int last) |
| 6122 | 700 { |
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701 cryptmethods[state->method_nr].encode_inplace_fn(state, buf, len, |
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702 buf, last); |
| 6122 | 703 } |
| 704 | |
| 705 /* | |
| 706 * Simple inplace decryption, modifies "buf[len]" in place. | |
| 707 */ | |
| 708 void | |
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709 crypt_decode_inplace( |
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710 cryptstate_T *state, |
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711 char_u *buf, |
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712 size_t len, |
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713 int last) |
| 6122 | 714 { |
|
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715 cryptmethods[state->method_nr].decode_inplace_fn(state, buf, len, |
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716 buf, last); |
| 6122 | 717 } |
| 718 | |
| 719 /* | |
| 720 * Free an allocated crypt key. Clear the text to make sure it doesn't stay | |
| 721 * in memory anywhere. | |
| 722 */ | |
| 723 void | |
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724 crypt_free_key(char_u *key) |
| 6122 | 725 { |
| 726 char_u *p; | |
| 727 | |
| 728 if (key != NULL) | |
| 729 { | |
| 730 for (p = key; *p != NUL; ++p) | |
| 731 *p = 0; | |
| 732 vim_free(key); | |
| 733 } | |
| 734 } | |
| 735 | |
| 736 /* | |
| 6353 | 737 * Check the crypt method and give a warning if it's outdated. |
| 738 */ | |
| 739 void | |
|
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740 crypt_check_method(int method) |
| 6353 | 741 { |
| 742 if (method < CRYPT_M_BF2) | |
| 743 { | |
| 744 msg_scroll = TRUE; | |
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745 msg(_("Warning: Using a weak encryption method; see :help 'cm'")); |
| 6353 | 746 } |
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747 } |
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748 |
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749 #ifdef FEAT_SODIUM |
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750 static void |
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751 crypt_check_swapfile_curbuf(void) |
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752 { |
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753 int method = crypt_get_method_nr(curbuf); |
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754 if (method == CRYPT_M_SOD) |
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755 { |
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756 // encryption uses padding and MAC, that does not work very well with |
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757 // swap and undo files, so disable them |
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758 mf_close_file(curbuf, TRUE); // remove the swap file |
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759 set_option_value_give_err((char_u *)"swf", 0, NULL, OPT_LOCAL); |
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760 msg_scroll = TRUE; |
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761 msg(_("Note: Encryption of swapfile not supported, disabling swap file")); |
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762 } |
| 6353 | 763 } |
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764 #endif |
| 6353 | 765 |
| 766 void | |
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767 crypt_check_current_method(void) |
| 6353 | 768 { |
| 769 crypt_check_method(crypt_get_method_nr(curbuf)); | |
| 770 } | |
| 771 | |
| 772 /* | |
| 6122 | 773 * Ask the user for a crypt key. |
| 774 * When "store" is TRUE, the new key is stored in the 'key' option, and the | |
| 775 * 'key' option value is returned: Don't free it. | |
| 776 * When "store" is FALSE, the typed key is returned in allocated memory. | |
| 777 * Returns NULL on failure. | |
| 778 */ | |
| 779 char_u * | |
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780 crypt_get_key( |
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781 int store, |
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782 int twice) // Ask for the key twice. |
| 6122 | 783 { |
| 784 char_u *p1, *p2 = NULL; | |
| 785 int round; | |
| 786 | |
| 787 for (round = 0; ; ++round) | |
| 788 { | |
| 789 cmdline_star = TRUE; | |
| 790 cmdline_row = msg_row; | |
| 791 p1 = getcmdline_prompt(NUL, round == 0 | |
| 792 ? (char_u *)_("Enter encryption key: ") | |
| 793 : (char_u *)_("Enter same key again: "), 0, EXPAND_NOTHING, | |
| 794 NULL); | |
| 795 cmdline_star = FALSE; | |
| 796 | |
| 797 if (p1 == NULL) | |
| 798 break; | |
| 799 | |
| 800 if (round == twice) | |
| 801 { | |
| 802 if (p2 != NULL && STRCMP(p1, p2) != 0) | |
| 803 { | |
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804 msg(_("Keys don't match!")); |
| 6122 | 805 crypt_free_key(p1); |
| 806 crypt_free_key(p2); | |
| 807 p2 = NULL; | |
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808 round = -1; // do it again |
| 6122 | 809 continue; |
| 810 } | |
| 811 | |
| 812 if (store) | |
| 813 { | |
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814 set_option_value_give_err((char_u *)"key", 0L, p1, OPT_LOCAL); |
| 6122 | 815 crypt_free_key(p1); |
| 816 p1 = curbuf->b_p_key; | |
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817 #ifdef FEAT_SODIUM |
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818 crypt_check_swapfile_curbuf(); |
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819 #endif |
| 6122 | 820 } |
| 821 break; | |
| 822 } | |
| 823 p2 = p1; | |
| 824 } | |
| 825 | |
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826 // since the user typed this, no need to wait for return |
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827 if (crypt_get_method_nr(curbuf) != CRYPT_M_SOD) |
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828 { |
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829 if (msg_didout) |
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830 msg_putchar('\n'); |
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831 need_wait_return = FALSE; |
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832 msg_didout = FALSE; |
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833 } |
| 6122 | 834 |
| 835 crypt_free_key(p2); | |
| 836 return p1; | |
| 837 } | |
| 838 | |
| 839 | |
| 840 /* | |
| 841 * Append a message to IObuff for the encryption/decryption method being used. | |
| 842 */ | |
| 843 void | |
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844 crypt_append_msg( |
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845 buf_T *buf) |
| 6122 | 846 { |
| 847 if (crypt_get_method_nr(buf) == 0) | |
| 848 STRCAT(IObuff, _("[crypted]")); | |
| 849 else | |
| 850 { | |
| 851 STRCAT(IObuff, "["); | |
| 852 STRCAT(IObuff, *buf->b_p_cm == NUL ? p_cm : buf->b_p_cm); | |
| 853 STRCAT(IObuff, "]"); | |
| 854 } | |
| 855 } | |
| 856 | |
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857 static int |
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858 crypt_sodium_init( |
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859 cryptstate_T *state UNUSED, |
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860 char_u *key UNUSED, |
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861 char_u *salt UNUSED, |
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862 int salt_len UNUSED, |
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863 char_u *seed UNUSED, |
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864 int seed_len UNUSED) |
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865 { |
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866 # ifdef FEAT_SODIUM |
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867 // crypto_box_SEEDBYTES == crypto_secretstream_xchacha20poly1305_KEYBYTES |
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868 unsigned char dkey[crypto_box_SEEDBYTES]; // 32 |
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869 sodium_state_T *sd_state; |
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870 int retval = 0; |
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871 |
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872 if (sodium_init() < 0) |
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873 return FAIL; |
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874 |
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875 sd_state = (sodium_state_T *)sodium_malloc(sizeof(sodium_state_T)); |
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876 sodium_memzero(sd_state, sizeof(sodium_state_T)); |
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877 |
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878 // derive a key from the password |
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879 if (crypto_pwhash(dkey, sizeof(dkey), (const char *)key, STRLEN(key), salt, |
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880 crypto_pwhash_OPSLIMIT_INTERACTIVE, crypto_pwhash_MEMLIMIT_INTERACTIVE, |
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881 crypto_pwhash_ALG_DEFAULT) != 0) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
882 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
883 // out of memory |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
884 sodium_free(sd_state); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
885 return FAIL; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
886 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
887 memcpy(sd_state->key, dkey, crypto_box_SEEDBYTES); |
|
25417
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
888 |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
889 retval += sodium_mlock(sd_state->key, crypto_box_SEEDBYTES); |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
890 retval += sodium_mlock(key, STRLEN(key)); |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
891 |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
892 if (retval < 0) |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
893 { |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
894 emsg(_(e_encryption_sodium_mlock_failed)); |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
895 sodium_free(sd_state); |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
896 return FAIL; |
|
1919361a53da
patch 8.2.3245: the crypt key may appear in a swap partition
Bram Moolenaar <Bram@vim.org>
parents:
25362
diff
changeset
|
897 } |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
898 sd_state->count = 0; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
899 state->method_state = sd_state; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
900 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
901 return OK; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
902 # else |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
903 emsg(e_libsodium_not_built_in); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
904 return FAIL; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
905 # endif |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
906 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
907 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
908 /* |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
909 * Encrypt "from[len]" into "to[len]". |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
910 * "from" and "to" can be equal to encrypt in place. |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
911 * Call needs to ensure that there is enough space in to (for the header) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
912 */ |
|
24990
85d1e82ed134
patch 8.2.3032: build problems with MSVC, other crypt issues with libsodium
Bram Moolenaar <Bram@vim.org>
parents:
24986
diff
changeset
|
913 #if 0 // Currently unused |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
914 void |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
915 crypt_sodium_encode( |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
916 cryptstate_T *state UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
917 char_u *from UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
918 size_t len UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
919 char_u *to UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
920 int last UNUSED) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
921 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
922 # ifdef FEAT_SODIUM |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
923 // crypto_box_SEEDBYTES == crypto_secretstream_xchacha20poly1305_KEYBYTES |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
924 sodium_state_T *sod_st = state->method_state; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
925 unsigned char tag = last |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
926 ? crypto_secretstream_xchacha20poly1305_TAG_FINAL : 0; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
927 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
928 if (sod_st->count == 0) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
929 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
930 if (len <= crypto_secretstream_xchacha20poly1305_HEADERBYTES) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
931 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
932 emsg(e_libsodium_cannot_encrypt_header); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
933 return; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
934 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
935 crypto_secretstream_xchacha20poly1305_init_push(&sod_st->state, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
936 to, sod_st->key); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
937 to += crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
938 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
939 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
940 if (sod_st->count && len <= crypto_secretstream_xchacha20poly1305_ABYTES) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
941 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
942 emsg(e_libsodium_cannot_encrypt_buffer); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
943 return; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
944 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
945 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
946 crypto_secretstream_xchacha20poly1305_push(&sod_st->state, to, NULL, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
947 from, len, NULL, 0, tag); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
948 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
949 sod_st->count++; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
950 # endif |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
951 } |
|
24990
85d1e82ed134
patch 8.2.3032: build problems with MSVC, other crypt issues with libsodium
Bram Moolenaar <Bram@vim.org>
parents:
24986
diff
changeset
|
952 #endif |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
953 |
|
24990
85d1e82ed134
patch 8.2.3032: build problems with MSVC, other crypt issues with libsodium
Bram Moolenaar <Bram@vim.org>
parents:
24986
diff
changeset
|
954 /* |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
955 * Decrypt "from[len]" into "to[len]". |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
956 * "from" and "to" can be equal to encrypt in place. |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
957 */ |
|
24990
85d1e82ed134
patch 8.2.3032: build problems with MSVC, other crypt issues with libsodium
Bram Moolenaar <Bram@vim.org>
parents:
24986
diff
changeset
|
958 #if 0 // Currently unused |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
959 void |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
960 crypt_sodium_decode( |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
961 cryptstate_T *state UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
962 char_u *from UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
963 size_t len UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
964 char_u *to UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
965 int last UNUSED) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
966 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
967 # ifdef FEAT_SODIUM |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
968 // crypto_box_SEEDBYTES == crypto_secretstream_xchacha20poly1305_KEYBYTES |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
969 sodium_state_T *sod_st = state->method_state; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
970 unsigned char tag; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
971 unsigned long long buf_len; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
972 char_u *p1 = from; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
973 char_u *p2 = to; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
974 char_u *buf_out; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
975 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
976 if (sod_st->count == 0 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
977 && len <= crypto_secretstream_xchacha20poly1305_HEADERBYTES) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
978 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
979 emsg(e_libsodium_cannot_decrypt_header); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
980 return; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
981 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
982 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
983 buf_out = (char_u *)alloc(len); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
984 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
985 if (buf_out == NULL) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
986 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
987 emsg(e_libsodium_cannot_allocate_buffer); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
988 return; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
989 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
990 if (sod_st->count == 0) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
991 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
992 if (crypto_secretstream_xchacha20poly1305_init_pull( |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
993 &sod_st->state, from, sod_st->key) != 0) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
994 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
995 emsg(e_libsodium_decryption_failed_header_incomplete); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
996 goto fail; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
997 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
998 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
999 from += crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1000 len -= crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1001 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1002 if (p1 == p2) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1003 to += crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1004 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1005 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1006 if (sod_st->count && len <= crypto_secretstream_xchacha20poly1305_ABYTES) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1007 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1008 emsg(e_libsodium_cannot_decrypt_buffer); |
|
24986
fa31a0ea09e1
patch 8.2.3030: Coverity reports a memory leak
Bram Moolenaar <Bram@vim.org>
parents:
24970
diff
changeset
|
1009 goto fail; |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1010 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1011 if (crypto_secretstream_xchacha20poly1305_pull(&sod_st->state, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1012 buf_out, &buf_len, &tag, from, len, NULL, 0) != 0) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1013 { |
|
24986
fa31a0ea09e1
patch 8.2.3030: Coverity reports a memory leak
Bram Moolenaar <Bram@vim.org>
parents:
24970
diff
changeset
|
1014 emsg(e_libsodium_decryption_failed); |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1015 goto fail; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1016 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1017 sod_st->count++; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1018 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1019 if (tag == crypto_secretstream_xchacha20poly1305_TAG_FINAL && !last) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1020 { |
|
24986
fa31a0ea09e1
patch 8.2.3030: Coverity reports a memory leak
Bram Moolenaar <Bram@vim.org>
parents:
24970
diff
changeset
|
1021 emsg(e_libsodium_decryption_failed_premature); |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1022 goto fail; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1023 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1024 if (p1 == p2) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1025 mch_memmove(p2, buf_out, buf_len); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1026 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1027 fail: |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1028 vim_free(buf_out); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1029 # endif |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1030 } |
|
24990
85d1e82ed134
patch 8.2.3032: build problems with MSVC, other crypt issues with libsodium
Bram Moolenaar <Bram@vim.org>
parents:
24986
diff
changeset
|
1031 #endif |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1032 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1033 /* |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1034 * Encrypt "from[len]" into "to[len]". |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1035 * "from" and "to" can be equal to encrypt in place. |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1036 */ |
|
29320
a74398c432a4
patch 9.0.0003: functions are global while they could be local
Bram Moolenaar <Bram@vim.org>
parents:
28809
diff
changeset
|
1037 static long |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1038 crypt_sodium_buffer_encode( |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1039 cryptstate_T *state UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1040 char_u *from UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1041 size_t len UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1042 char_u **buf_out UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1043 int last UNUSED) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1044 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1045 # ifdef FEAT_SODIUM |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1046 // crypto_box_SEEDBYTES == crypto_secretstream_xchacha20poly1305_KEYBYTES |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1047 unsigned long long out_len; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1048 char_u *ptr; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1049 unsigned char tag = last |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1050 ? crypto_secretstream_xchacha20poly1305_TAG_FINAL : 0; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1051 int length; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1052 sodium_state_T *sod_st = state->method_state; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1053 int first = (sod_st->count == 0); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1054 |
|
24990
85d1e82ed134
patch 8.2.3032: build problems with MSVC, other crypt issues with libsodium
Bram Moolenaar <Bram@vim.org>
parents:
24986
diff
changeset
|
1055 length = (int)len + crypto_secretstream_xchacha20poly1305_ABYTES |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1056 + (first ? crypto_secretstream_xchacha20poly1305_HEADERBYTES : 0); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1057 *buf_out = alloc_clear(length); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1058 if (*buf_out == NULL) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1059 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1060 emsg(e_libsodium_cannot_allocate_buffer); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1061 return -1; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1062 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1063 ptr = *buf_out; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1064 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1065 if (first) |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1066 { |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1067 crypto_secretstream_xchacha20poly1305_init_push(&sod_st->state, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1068 ptr, sod_st->key); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1069 ptr += crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1070 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1071 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1072 crypto_secretstream_xchacha20poly1305_push(&sod_st->state, ptr, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1073 &out_len, from, len, NULL, 0, tag); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1074 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1075 sod_st->count++; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1076 return out_len + (first |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1077 ? crypto_secretstream_xchacha20poly1305_HEADERBYTES : 0); |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1078 # else |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1079 return -1; |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1080 # endif |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1081 } |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1082 |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1083 /* |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1084 * Decrypt "from[len]" into "to[len]". |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1085 * "from" and "to" can be equal to encrypt in place. |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1086 */ |
|
29320
a74398c432a4
patch 9.0.0003: functions are global while they could be local
Bram Moolenaar <Bram@vim.org>
parents:
28809
diff
changeset
|
1087 static long |
|
24970
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1088 crypt_sodium_buffer_decode( |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1089 cryptstate_T *state UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1090 char_u *from UNUSED, |
|
7e9e53a0368f
patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents:
18757
diff
changeset
|
1091 size_t len UNUSED, |
|
7e9e53a0368f
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1092 char_u **buf_out UNUSED, |
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1093 int last UNUSED) |
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1094 { |
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1095 # ifdef FEAT_SODIUM |
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1096 // crypto_box_SEEDBYTES == crypto_secretstream_xchacha20poly1305_KEYBYTES |
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1097 sodium_state_T *sod_st = state->method_state; |
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1098 unsigned char tag; |
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1099 unsigned long long out_len; |
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1100 *buf_out = alloc_clear(len); |
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1101 if (*buf_out == NULL) |
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1102 { |
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1103 emsg(e_libsodium_cannot_allocate_buffer); |
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1104 return -1; |
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1105 } |
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1106 |
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1107 if (sod_st->count == 0) |
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1108 { |
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1109 if (crypto_secretstream_xchacha20poly1305_init_pull(&sod_st->state, |
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1110 from, sod_st->key) != 0) |
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1111 { |
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1112 emsg(e_libsodium_decryption_failed_header_incomplete); |
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1113 return -1; |
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1114 } |
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1115 from += crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
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1116 len -= crypto_secretstream_xchacha20poly1305_HEADERBYTES; |
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1117 sod_st->count++; |
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1118 } |
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1119 if (crypto_secretstream_xchacha20poly1305_pull(&sod_st->state, |
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1120 *buf_out, &out_len, &tag, from, len, NULL, 0) != 0) |
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1121 { |
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1122 emsg(e_libsodium_decryption_failed); |
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1123 return -1; |
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1124 } |
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1125 |
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1126 if (tag == crypto_secretstream_xchacha20poly1305_TAG_FINAL && !last) |
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1127 emsg(e_libsodium_decryption_failed_premature); |
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1128 return (long) out_len; |
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1129 # else |
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1130 return -1; |
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1131 # endif |
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1132 } |
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1133 |
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1134 # if defined(FEAT_SODIUM) || defined(PROTO) |
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1135 int |
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1136 crypt_sodium_munlock(void *const addr, const size_t len) |
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1137 { |
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1138 return sodium_munlock(addr, len); |
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1139 } |
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1140 |
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1141 void |
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1142 crypt_sodium_randombytes_buf(void *const buf, const size_t size) |
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1143 { |
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1144 randombytes_buf(buf, size); |
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1145 } |
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1146 # endif |
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1147 |
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1148 #endif // FEAT_CRYPT |