annotate src/crypt.c @ 16498:675bf614934c

Added tag v8.1.1252 for changeset ac4e38fbae9d12b4ef40981ce2c9482d92055574
author Bram Moolenaar <Bram@vim.org>
date Fri, 03 May 2019 16:15:05 +0200
parents a1229400434a
children fc58fee685e2
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rev   line source
10042
4aead6a9b7a9 commit https://github.com/vim/vim/commit/edf3f97ae2af024708ebb4ac614227327033ca47
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1 /* vi:set ts=8 sts=4 sw=4 noet:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * crypt.c: Generic encryption support.
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12 */
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13 #include "vim.h"
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14
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15 #if defined(FEAT_CRYPT) || defined(PROTO)
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16 /*
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17 * Optional encryption support.
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18 * Mohsin Ahmed, mosh@sasi.com, 1998-09-24
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19 * Based on zip/crypt sources.
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20 * Refactored by David Leadbeater, 2014.
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21 *
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22 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to
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23 * most countries. There are a few exceptions, but that still should not be a
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24 * problem since this code was originally created in Europe and India.
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25 *
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26 * Blowfish addition originally made by Mohsin Ahmed,
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27 * http://www.cs.albany.edu/~mosh 2010-03-14
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28 * Based on blowfish by Bruce Schneier (http://www.schneier.com/blowfish.html)
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29 * and sha256 by Christophe Devine.
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30 */
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31
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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 salt */
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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 */
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41
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42 /* Optional function pointer for a self-test. */
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43 int (* self_test_fn)();
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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,
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47 char_u *salt, int salt_len, char_u *seed, int seed_len);
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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. */
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51 void (*encode_fn)(cryptstate_T *state, char_u *from, size_t len,
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52 char_u *to);
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53 void (*decode_fn)(cryptstate_T *state, char_u *from, size_t len,
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54 char_u *to);
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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). */
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58 long (*encode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len,
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59 char_u **newptr);
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60 long (*decode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len,
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61 char_u **newptr);
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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.
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70 */
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71 void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
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72 char_u *p2);
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73 void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
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74 char_u *p2);
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75 } cryptmethod_T;
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76
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77 /* index is method_nr of cryptstate_T, CRYPT_M_* */
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78 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = {
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79 /* PK_Zip; very weak */
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80 {
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81 "zip",
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82 "VimCrypt~01!",
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83 0,
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84 0,
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85 #ifdef CRYPT_NOT_INPLACE
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86 TRUE,
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87 #endif
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88 FALSE,
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89 NULL,
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90 crypt_zip_init,
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91 crypt_zip_encode, crypt_zip_decode,
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92 NULL, NULL,
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93 crypt_zip_encode, crypt_zip_decode,
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94 },
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95
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96 /* Blowfish/CFB + SHA-256 custom key derivation; implementation issues. */
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97 {
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98 "blowfish",
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99 "VimCrypt~02!",
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100 8,
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101 8,
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102 #ifdef CRYPT_NOT_INPLACE
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103 TRUE,
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104 #endif
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105 FALSE,
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106 blowfish_self_test,
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107 crypt_blowfish_init,
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108 crypt_blowfish_encode, crypt_blowfish_decode,
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109 NULL, NULL,
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110 crypt_blowfish_encode, crypt_blowfish_decode,
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111 },
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112
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113 /* Blowfish/CFB + SHA-256 custom key derivation; fixed. */
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114 {
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115 "blowfish2",
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116 "VimCrypt~03!",
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117 8,
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118 8,
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119 #ifdef CRYPT_NOT_INPLACE
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120 TRUE,
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121 #endif
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122 TRUE,
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123 blowfish_self_test,
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124 crypt_blowfish_init,
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125 crypt_blowfish_encode, crypt_blowfish_decode,
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126 NULL, NULL,
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127 crypt_blowfish_encode, crypt_blowfish_decode,
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128 },
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129
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130 /* NOTE: when adding a new method, use some random bytes for the magic key,
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131 * to avoid that a text file is recognized as encrypted. */
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132 };
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133
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134 #define CRYPT_MAGIC_LEN 12 /* cannot change */
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135 static char crypt_magic_head[] = "VimCrypt~";
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136
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137 /*
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138 * Return int value for crypt method name.
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139 * 0 for "zip", the old method. Also for any non-valid value.
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140 * 1 for "blowfish".
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141 * 2 for "blowfish2".
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142 */
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143 int
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144 crypt_method_nr_from_name(char_u *name)
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145 {
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146 int i;
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147
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148 for (i = 0; i < CRYPT_M_COUNT; ++i)
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149 if (STRCMP(name, cryptmethods[i].name) == 0)
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150 return i;
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151 return 0;
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152 }
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153
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154 /*
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155 * Get the crypt method used for a file from "ptr[len]", the magic text at the
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156 * start of the file.
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157 * Returns -1 when no encryption used.
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158 */
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159 int
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160 crypt_method_nr_from_magic(char *ptr, int len)
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161 {
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162 int i;
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163
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164 if (len < CRYPT_MAGIC_LEN)
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165 return -1;
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166
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167 for (i = 0; i < CRYPT_M_COUNT; i++)
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168 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0)
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169 return i;
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170
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171 i = (int)STRLEN(crypt_magic_head);
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172 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0)
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173 emsg(_("E821: File is encrypted with unknown method"));
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174
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175 return -1;
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176 }
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177
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178 #ifdef CRYPT_NOT_INPLACE
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179 /*
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180 * Return TRUE if the crypt method for "method_nr" can be done in-place.
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181 */
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182 int
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183 crypt_works_inplace(cryptstate_T *state)
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184 {
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185 return cryptmethods[state->method_nr].works_inplace;
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186 }
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187 #endif
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188
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189 /*
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190 * Get the crypt method for buffer "buf" as a number.
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191 */
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192 int
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193 crypt_get_method_nr(buf_T *buf)
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194 {
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195 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
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196 }
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197
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198 /*
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199 * Return TRUE when the buffer uses an encryption method that encrypts the
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200 * whole undo file, not only the text.
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201 */
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202 int
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203 crypt_whole_undofile(int method_nr)
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204 {
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205 return cryptmethods[method_nr].whole_undofile;
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206 }
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207
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208 /*
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209 * Get crypt method specifc length of the file header in bytes.
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210 */
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211 int
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212 crypt_get_header_len(int method_nr)
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213 {
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214 return CRYPT_MAGIC_LEN
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215 + cryptmethods[method_nr].salt_len
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216 + cryptmethods[method_nr].seed_len;
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217 }
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218
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219 /*
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220 * Set the crypt method for buffer "buf" to "method_nr" using the int value as
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221 * returned by crypt_method_nr_from_name().
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222 */
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223 void
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224 crypt_set_cm_option(buf_T *buf, int method_nr)
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225 {
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226 free_string_option(buf->b_p_cm);
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227 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name);
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228 }
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229
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230 /*
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231 * If the crypt method for the current buffer has a self-test, run it and
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232 * return OK/FAIL.
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233 */
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234 int
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235 crypt_self_test(void)
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236 {
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237 int method_nr = crypt_get_method_nr(curbuf);
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238
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239 if (cryptmethods[method_nr].self_test_fn == NULL)
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240 return OK;
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241 return cryptmethods[method_nr].self_test_fn();
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242 }
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243
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244 /*
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245 * Allocate a crypt state and initialize it.
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246 * Return NULL for failure.
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247 */
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248 cryptstate_T *
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249 crypt_create(
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250 int method_nr,
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251 char_u *key,
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252 char_u *salt,
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253 int salt_len,
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254 char_u *seed,
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255 int seed_len)
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256 {
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257 cryptstate_T *state = (cryptstate_T *)alloc((int)sizeof(cryptstate_T));
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258
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259 if (state == NULL)
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260 return state;
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261
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262 state->method_nr = method_nr;
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263 if (cryptmethods[method_nr].init_fn(
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264 state, key, salt, salt_len, seed, seed_len) == FAIL)
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265 {
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266 vim_free(state);
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267 return NULL;
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268 }
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269 return state;
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270 }
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271
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272 /*
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273 * Allocate a crypt state from a file header and initialize it.
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274 * Assumes that header contains at least the number of bytes that
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275 * crypt_get_header_len() returns for "method_nr".
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276 */
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277 cryptstate_T *
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278 crypt_create_from_header(
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279 int method_nr,
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280 char_u *key,
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281 char_u *header)
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282 {
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283 char_u *salt = NULL;
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284 char_u *seed = NULL;
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285 int salt_len = cryptmethods[method_nr].salt_len;
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286 int seed_len = cryptmethods[method_nr].seed_len;
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287
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288 if (salt_len > 0)
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289 salt = header + CRYPT_MAGIC_LEN;
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290 if (seed_len > 0)
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291 seed = header + CRYPT_MAGIC_LEN + salt_len;
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292
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293 return crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
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294 }
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295
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296 /*
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297 * Read the crypt method specific header data from "fp".
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298 * Return an allocated cryptstate_T or NULL on error.
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299 */
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300 cryptstate_T *
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301 crypt_create_from_file(FILE *fp, char_u *key)
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302 {
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303 int method_nr;
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304 int header_len;
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305 char magic_buffer[CRYPT_MAGIC_LEN];
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306 char_u *buffer;
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307 cryptstate_T *state;
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308
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309 if (fread(magic_buffer, CRYPT_MAGIC_LEN, 1, fp) != 1)
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310 return NULL;
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311 method_nr = crypt_method_nr_from_magic(magic_buffer, CRYPT_MAGIC_LEN);
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312 if (method_nr < 0)
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313 return NULL;
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314
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315 header_len = crypt_get_header_len(method_nr);
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316 if ((buffer = alloc(header_len)) == NULL)
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317 return NULL;
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318 mch_memmove(buffer, magic_buffer, CRYPT_MAGIC_LEN);
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319 if (header_len > CRYPT_MAGIC_LEN
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320 && fread(buffer + CRYPT_MAGIC_LEN,
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321 header_len - CRYPT_MAGIC_LEN, 1, fp) != 1)
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322 {
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323 vim_free(buffer);
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324 return NULL;
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325 }
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326
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327 state = crypt_create_from_header(method_nr, key, buffer);
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328 vim_free(buffer);
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329 return state;
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330 }
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331
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332 /*
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333 * Allocate a cryptstate_T for writing and initialize it with "key".
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334 * Allocates and fills in the header and stores it in "header", setting
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335 * "header_len". The header may include salt and seed, depending on
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336 * cryptmethod. Caller must free header.
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337 * Returns the state or NULL on failure.
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338 */
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339 cryptstate_T *
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340 crypt_create_for_writing(
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341 int method_nr,
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342 char_u *key,
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343 char_u **header,
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344 int *header_len)
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345 {
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346 int len = crypt_get_header_len(method_nr);
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347 char_u *salt = NULL;
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348 char_u *seed = NULL;
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349 int salt_len = cryptmethods[method_nr].salt_len;
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350 int seed_len = cryptmethods[method_nr].seed_len;
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351 cryptstate_T *state;
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352
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353 *header_len = len;
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354 *header = alloc(len);
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355 if (*header == NULL)
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356 return NULL;
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357
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358 mch_memmove(*header, cryptmethods[method_nr].magic, CRYPT_MAGIC_LEN);
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359 if (salt_len > 0 || seed_len > 0)
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360 {
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361 if (salt_len > 0)
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362 salt = *header + CRYPT_MAGIC_LEN;
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363 if (seed_len > 0)
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364 seed = *header + CRYPT_MAGIC_LEN + salt_len;
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365
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366 /* TODO: Should this be crypt method specific? (Probably not worth
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367 * it). sha2_seed is pretty bad for large amounts of entropy, so make
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368 * that into something which is suitable for anything. */
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369 sha2_seed(salt, salt_len, seed, seed_len);
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370 }
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371
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372 state = crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
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373 if (state == NULL)
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374 VIM_CLEAR(*header);
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375 return state;
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376 }
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377
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378 /*
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379 * Free the crypt state.
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380 */
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381 void
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382 crypt_free_state(cryptstate_T *state)
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383 {
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384 vim_free(state->method_state);
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385 vim_free(state);
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386 }
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387
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388 #ifdef CRYPT_NOT_INPLACE
6122
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389 /*
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diff changeset
390 * Encode "from[len]" and store the result in a newly allocated buffer, which
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391 * is stored in "newptr".
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392 * Return number of bytes in "newptr", 0 for need more or -1 on error.
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393 */
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394 long
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diff changeset
395 crypt_encode_alloc(
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396 cryptstate_T *state,
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diff changeset
397 char_u *from,
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Christian Brabandt <cb@256bit.org>
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diff changeset
398 size_t len,
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diff changeset
399 char_u **newptr)
6122
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400 {
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401 cryptmethod_T *method = &cryptmethods[state->method_nr];
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402
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403 if (method->encode_buffer_fn != NULL)
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diff changeset
404 /* Has buffer function, pass through. */
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405 return method->encode_buffer_fn(state, from, len, newptr);
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406 if (len == 0)
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407 /* Not buffering, just return EOF. */
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408 return (long)len;
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409
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410 *newptr = alloc((long)len);
6122
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411 if (*newptr == NULL)
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412 return -1;
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413 method->encode_fn(state, from, len, *newptr);
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414 return (long)len;
6122
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415 }
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parents:
diff changeset
416
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diff changeset
417 /*
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diff changeset
418 * Decrypt "ptr[len]" and store the result in a newly allocated buffer, which
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419 * is stored in "newptr".
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420 * Return number of bytes in "newptr", 0 for need more or -1 on error.
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diff changeset
421 */
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diff changeset
422 long
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diff changeset
423 crypt_decode_alloc(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
424 cryptstate_T *state,
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
425 char_u *ptr,
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
426 long len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
427 char_u **newptr)
6122
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428 {
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429 cryptmethod_T *method = &cryptmethods[state->method_nr];
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430
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431 if (method->decode_buffer_fn != NULL)
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432 /* Has buffer function, pass through. */
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433 return method->decode_buffer_fn(state, ptr, len, newptr);
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434
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435 if (len == 0)
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diff changeset
436 /* Not buffering, just return EOF. */
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437 return len;
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diff changeset
438
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parents:
diff changeset
439 *newptr = alloc(len);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
440 if (*newptr == NULL)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
441 return -1;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
442 method->decode_fn(state, ptr, len, *newptr);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
443 return len;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
444 }
15531
959cf4c63b18 patch 8.1.0773: not all crypt code is tested
Bram Moolenaar <Bram@vim.org>
parents: 15470
diff changeset
445 #endif
6122
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parents:
diff changeset
446
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
447 /*
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
448 * Encrypting "from[len]" into "to[len]".
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
449 */
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
450 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
451 crypt_encode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
452 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
453 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
454 size_t len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
455 char_u *to)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
456 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
457 cryptmethods[state->method_nr].encode_fn(state, from, len, to);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
458 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
459
15531
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Bram Moolenaar <Bram@vim.org>
parents: 15470
diff changeset
460 #if 0 // unused
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
461 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
462 * decrypting "from[len]" into "to[len]".
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
463 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
464 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
465 crypt_decode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
466 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
467 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
468 size_t len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
469 char_u *to)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
470 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
471 cryptmethods[state->method_nr].decode_fn(state, from, len, to);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
472 }
15531
959cf4c63b18 patch 8.1.0773: not all crypt code is tested
Bram Moolenaar <Bram@vim.org>
parents: 15470
diff changeset
473 #endif
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
474
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
475 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
476 * Simple inplace encryption, modifies "buf[len]" in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
477 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
478 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
479 crypt_encode_inplace(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
480 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
481 char_u *buf,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
482 size_t len)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
483 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
484 cryptmethods[state->method_nr].encode_inplace_fn(state, buf, len, buf);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
485 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
486
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
487 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
488 * Simple inplace decryption, modifies "buf[len]" in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
489 */
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
490 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
491 crypt_decode_inplace(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
492 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
493 char_u *buf,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
494 size_t len)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
495 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
496 cryptmethods[state->method_nr].decode_inplace_fn(state, buf, len, buf);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
497 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
498
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
499 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
500 * Free an allocated crypt key. Clear the text to make sure it doesn't stay
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
501 * in memory anywhere.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
502 */
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
503 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
504 crypt_free_key(char_u *key)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
505 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
506 char_u *p;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
507
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
508 if (key != NULL)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
509 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
510 for (p = key; *p != NUL; ++p)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
511 *p = 0;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
512 vim_free(key);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
513 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
514 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
515
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
516 /*
6353
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
517 * Check the crypt method and give a warning if it's outdated.
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
518 */
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
519 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
520 crypt_check_method(int method)
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
521 {
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
522 if (method < CRYPT_M_BF2)
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
523 {
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
524 msg_scroll = TRUE;
15543
dd725a8ab112 patch 8.1.0779: argument for message functions is inconsistent
Bram Moolenaar <Bram@vim.org>
parents: 15531
diff changeset
525 msg(_("Warning: Using a weak encryption method; see :help 'cm'"));
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
526 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
527 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
528
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
529 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
530 crypt_check_current_method(void)
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
531 {
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
532 crypt_check_method(crypt_get_method_nr(curbuf));
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
533 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
534
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
535 /*
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
536 * Ask the user for a crypt key.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
537 * When "store" is TRUE, the new key is stored in the 'key' option, and the
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
538 * 'key' option value is returned: Don't free it.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
539 * When "store" is FALSE, the typed key is returned in allocated memory.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
540 * Returns NULL on failure.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
541 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
542 char_u *
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
543 crypt_get_key(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
544 int store,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
545 int twice) /* Ask for the key twice. */
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
546 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
547 char_u *p1, *p2 = NULL;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
548 int round;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
549
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
550 for (round = 0; ; ++round)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
551 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
552 cmdline_star = TRUE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
553 cmdline_row = msg_row;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
554 p1 = getcmdline_prompt(NUL, round == 0
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
555 ? (char_u *)_("Enter encryption key: ")
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
556 : (char_u *)_("Enter same key again: "), 0, EXPAND_NOTHING,
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
557 NULL);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
558 cmdline_star = FALSE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
559
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
560 if (p1 == NULL)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
561 break;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
562
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
563 if (round == twice)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
564 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
565 if (p2 != NULL && STRCMP(p1, p2) != 0)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
566 {
15543
dd725a8ab112 patch 8.1.0779: argument for message functions is inconsistent
Bram Moolenaar <Bram@vim.org>
parents: 15531
diff changeset
567 msg(_("Keys don't match!"));
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
568 crypt_free_key(p1);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
569 crypt_free_key(p2);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
570 p2 = NULL;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
571 round = -1; /* do it again */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
572 continue;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
573 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
574
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
575 if (store)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
576 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
577 set_option_value((char_u *)"key", 0L, p1, OPT_LOCAL);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
578 crypt_free_key(p1);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
579 p1 = curbuf->b_p_key;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
580 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
581 break;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
582 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
583 p2 = p1;
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584 }
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585
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Bram Moolenaar <bram@vim.org>
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586 /* since the user typed this, no need to wait for return */
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Bram Moolenaar <bram@vim.org>
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587 if (msg_didout)
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Bram Moolenaar <bram@vim.org>
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588 msg_putchar('\n');
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Bram Moolenaar <bram@vim.org>
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589 need_wait_return = FALSE;
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590 msg_didout = FALSE;
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591
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592 crypt_free_key(p2);
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593 return p1;
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594 }
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595
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parents:
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596
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Bram Moolenaar <bram@vim.org>
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597 /*
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Bram Moolenaar <bram@vim.org>
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598 * Append a message to IObuff for the encryption/decryption method being used.
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599 */
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Bram Moolenaar <bram@vim.org>
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600 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
601 crypt_append_msg(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
602 buf_T *buf)
6122
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parents:
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603 {
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Bram Moolenaar <bram@vim.org>
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604 if (crypt_get_method_nr(buf) == 0)
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Bram Moolenaar <bram@vim.org>
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605 STRCAT(IObuff, _("[crypted]"));
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Bram Moolenaar <bram@vim.org>
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606 else
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Bram Moolenaar <bram@vim.org>
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607 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
608 STRCAT(IObuff, "[");
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parents:
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609 STRCAT(IObuff, *buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
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Bram Moolenaar <bram@vim.org>
parents:
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610 STRCAT(IObuff, "]");
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Bram Moolenaar <bram@vim.org>
parents:
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611 }
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Bram Moolenaar <bram@vim.org>
parents:
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612 }
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Bram Moolenaar <bram@vim.org>
parents:
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613
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Bram Moolenaar <bram@vim.org>
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614 #endif /* FEAT_CRYPT */