annotate src/crypt.c @ 20666:e66b9b38cfab

Added tag v8.2.0886 for changeset 6ff992bf4c829024db2f16b442346e9723925f51
author Bram Moolenaar <Bram@vim.org>
date Tue, 02 Jun 2020 21:45:04 +0200
parents c469e1930456
children 7e9e53a0368f
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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 void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
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71 char_u *p2);
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72 void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
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73 char_u *p2);
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74 } cryptmethod_T;
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75
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76 // index is method_nr of cryptstate_T, CRYPT_M_*
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77 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = {
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78 // PK_Zip; very weak
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79 {
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80 "zip",
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81 "VimCrypt~01!",
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82 0,
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83 0,
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84 #ifdef CRYPT_NOT_INPLACE
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85 TRUE,
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86 #endif
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87 FALSE,
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88 NULL,
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89 crypt_zip_init,
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90 crypt_zip_encode, crypt_zip_decode,
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91 NULL, NULL,
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92 crypt_zip_encode, crypt_zip_decode,
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93 },
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94
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95 // Blowfish/CFB + SHA-256 custom key derivation; implementation issues.
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96 {
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97 "blowfish",
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98 "VimCrypt~02!",
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99 8,
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100 8,
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101 #ifdef CRYPT_NOT_INPLACE
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102 TRUE,
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103 #endif
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104 FALSE,
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105 blowfish_self_test,
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106 crypt_blowfish_init,
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107 crypt_blowfish_encode, crypt_blowfish_decode,
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108 NULL, NULL,
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109 crypt_blowfish_encode, crypt_blowfish_decode,
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110 },
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111
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112 // Blowfish/CFB + SHA-256 custom key derivation; fixed.
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113 {
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114 "blowfish2",
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115 "VimCrypt~03!",
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116 8,
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117 8,
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118 #ifdef CRYPT_NOT_INPLACE
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119 TRUE,
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120 #endif
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121 TRUE,
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122 blowfish_self_test,
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123 crypt_blowfish_init,
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124 crypt_blowfish_encode, crypt_blowfish_decode,
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125 NULL, NULL,
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126 crypt_blowfish_encode, crypt_blowfish_decode,
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127 },
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128
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129 // NOTE: when adding a new method, use some random bytes for the magic key,
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130 // to avoid that a text file is recognized as encrypted.
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131 };
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132
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133 #define CRYPT_MAGIC_LEN 12 // cannot change
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134 static char crypt_magic_head[] = "VimCrypt~";
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135
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136 /*
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137 * Return int value for crypt method name.
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138 * 0 for "zip", the old method. Also for any non-valid value.
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139 * 1 for "blowfish".
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140 * 2 for "blowfish2".
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141 */
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142 int
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143 crypt_method_nr_from_name(char_u *name)
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144 {
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145 int i;
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146
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147 for (i = 0; i < CRYPT_M_COUNT; ++i)
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148 if (STRCMP(name, cryptmethods[i].name) == 0)
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149 return i;
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150 return 0;
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151 }
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152
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153 /*
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154 * Get the crypt method used for a file from "ptr[len]", the magic text at the
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155 * start of the file.
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156 * Returns -1 when no encryption used.
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157 */
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158 int
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159 crypt_method_nr_from_magic(char *ptr, int len)
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160 {
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161 int i;
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162
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163 if (len < CRYPT_MAGIC_LEN)
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164 return -1;
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165
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166 for (i = 0; i < CRYPT_M_COUNT; i++)
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167 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0)
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168 return i;
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169
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170 i = (int)STRLEN(crypt_magic_head);
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171 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0)
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172 emsg(_("E821: File is encrypted with unknown method"));
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173
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174 return -1;
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175 }
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176
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177 #ifdef CRYPT_NOT_INPLACE
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178 /*
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179 * Return TRUE if the crypt method for "method_nr" can be done in-place.
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180 */
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181 int
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182 crypt_works_inplace(cryptstate_T *state)
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183 {
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184 return cryptmethods[state->method_nr].works_inplace;
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185 }
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186 #endif
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187
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188 /*
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189 * Get the crypt method for buffer "buf" as a number.
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190 */
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191 int
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192 crypt_get_method_nr(buf_T *buf)
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193 {
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194 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
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195 }
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196
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197 /*
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198 * Return TRUE when the buffer uses an encryption method that encrypts the
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199 * whole undo file, not only the text.
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200 */
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201 int
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202 crypt_whole_undofile(int method_nr)
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203 {
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204 return cryptmethods[method_nr].whole_undofile;
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205 }
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206
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207 /*
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208 * Get crypt method specific length of the file header in bytes.
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209 */
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210 int
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211 crypt_get_header_len(int method_nr)
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212 {
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213 return CRYPT_MAGIC_LEN
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214 + cryptmethods[method_nr].salt_len
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215 + cryptmethods[method_nr].seed_len;
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216 }
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217
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218 /*
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219 * Set the crypt method for buffer "buf" to "method_nr" using the int value as
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220 * returned by crypt_method_nr_from_name().
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221 */
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222 void
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223 crypt_set_cm_option(buf_T *buf, int method_nr)
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224 {
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225 free_string_option(buf->b_p_cm);
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226 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name);
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227 }
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228
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229 /*
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230 * If the crypt method for the current buffer has a self-test, run it and
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231 * return OK/FAIL.
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232 */
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233 int
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234 crypt_self_test(void)
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235 {
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236 int method_nr = crypt_get_method_nr(curbuf);
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237
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238 if (cryptmethods[method_nr].self_test_fn == NULL)
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239 return OK;
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240 return cryptmethods[method_nr].self_test_fn();
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241 }
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242
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243 /*
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244 * Allocate a crypt state and initialize it.
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245 * Return NULL for failure.
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246 */
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247 cryptstate_T *
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248 crypt_create(
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249 int method_nr,
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250 char_u *key,
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251 char_u *salt,
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252 int salt_len,
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253 char_u *seed,
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254 int seed_len)
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255 {
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256 cryptstate_T *state = ALLOC_ONE(cryptstate_T);
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257
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258 if (state == NULL)
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259 return state;
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260
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261 state->method_nr = method_nr;
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262 if (cryptmethods[method_nr].init_fn(
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263 state, key, salt, salt_len, seed, seed_len) == FAIL)
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264 {
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265 vim_free(state);
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266 return NULL;
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267 }
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268 return state;
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269 }
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270
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271 /*
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272 * Allocate a crypt state from a file header and initialize it.
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273 * Assumes that header contains at least the number of bytes that
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274 * crypt_get_header_len() returns for "method_nr".
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275 */
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276 cryptstate_T *
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277 crypt_create_from_header(
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278 int method_nr,
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279 char_u *key,
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280 char_u *header)
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281 {
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282 char_u *salt = NULL;
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283 char_u *seed = NULL;
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284 int salt_len = cryptmethods[method_nr].salt_len;
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285 int seed_len = cryptmethods[method_nr].seed_len;
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286
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287 if (salt_len > 0)
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288 salt = header + CRYPT_MAGIC_LEN;
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289 if (seed_len > 0)
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290 seed = header + CRYPT_MAGIC_LEN + salt_len;
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291
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292 return crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
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293 }
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294
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295 /*
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296 * Read the crypt method specific header data from "fp".
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297 * Return an allocated cryptstate_T or NULL on error.
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298 */
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299 cryptstate_T *
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300 crypt_create_from_file(FILE *fp, char_u *key)
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301 {
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302 int method_nr;
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303 int header_len;
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304 char magic_buffer[CRYPT_MAGIC_LEN];
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305 char_u *buffer;
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306 cryptstate_T *state;
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307
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308 if (fread(magic_buffer, CRYPT_MAGIC_LEN, 1, fp) != 1)
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309 return NULL;
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310 method_nr = crypt_method_nr_from_magic(magic_buffer, CRYPT_MAGIC_LEN);
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311 if (method_nr < 0)
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312 return NULL;
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313
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314 header_len = crypt_get_header_len(method_nr);
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315 if ((buffer = alloc(header_len)) == NULL)
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316 return NULL;
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317 mch_memmove(buffer, magic_buffer, CRYPT_MAGIC_LEN);
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318 if (header_len > CRYPT_MAGIC_LEN
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319 && fread(buffer + CRYPT_MAGIC_LEN,
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320 header_len - CRYPT_MAGIC_LEN, 1, fp) != 1)
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321 {
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322 vim_free(buffer);
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323 return NULL;
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324 }
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325
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326 state = crypt_create_from_header(method_nr, key, buffer);
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327 vim_free(buffer);
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328 return state;
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329 }
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330
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331 /*
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332 * Allocate a cryptstate_T for writing and initialize it with "key".
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333 * Allocates and fills in the header and stores it in "header", setting
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334 * "header_len". The header may include salt and seed, depending on
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335 * cryptmethod. Caller must free header.
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336 * Returns the state or NULL on failure.
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337 */
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338 cryptstate_T *
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339 crypt_create_for_writing(
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340 int method_nr,
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341 char_u *key,
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342 char_u **header,
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343 int *header_len)
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344 {
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345 int len = crypt_get_header_len(method_nr);
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346 char_u *salt = NULL;
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347 char_u *seed = NULL;
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348 int salt_len = cryptmethods[method_nr].salt_len;
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349 int seed_len = cryptmethods[method_nr].seed_len;
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350 cryptstate_T *state;
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351
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352 *header_len = len;
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353 *header = alloc(len);
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354 if (*header == NULL)
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355 return NULL;
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356
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357 mch_memmove(*header, cryptmethods[method_nr].magic, CRYPT_MAGIC_LEN);
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358 if (salt_len > 0 || seed_len > 0)
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359 {
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360 if (salt_len > 0)
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361 salt = *header + CRYPT_MAGIC_LEN;
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362 if (seed_len > 0)
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363 seed = *header + CRYPT_MAGIC_LEN + salt_len;
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364
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365 // TODO: Should this be crypt method specific? (Probably not worth
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366 // it). sha2_seed is pretty bad for large amounts of entropy, so make
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367 // that into something which is suitable for anything.
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368 sha2_seed(salt, salt_len, seed, seed_len);
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369 }
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370
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371 state = crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
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372 if (state == NULL)
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373 VIM_CLEAR(*header);
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374 return state;
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375 }
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376
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377 /*
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378 * Free the crypt state.
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379 */
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380 void
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381 crypt_free_state(cryptstate_T *state)
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382 {
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383 vim_free(state->method_state);
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384 vim_free(state);
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385 }
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386
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387 #ifdef CRYPT_NOT_INPLACE
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388 /*
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389 * Encode "from[len]" and store the result in a newly allocated buffer, which
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390 * is stored in "newptr".
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391 * Return number of bytes in "newptr", 0 for need more or -1 on error.
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392 */
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393 long
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394 crypt_encode_alloc(
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395 cryptstate_T *state,
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396 char_u *from,
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397 size_t len,
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398 char_u **newptr)
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399 {
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400 cryptmethod_T *method = &cryptmethods[state->method_nr];
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401
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402 if (method->encode_buffer_fn != NULL)
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403 // Has buffer function, pass through.
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404 return method->encode_buffer_fn(state, from, len, newptr);
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405 if (len == 0)
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406 // Not buffering, just return EOF.
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407 return (long)len;
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408
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409 *newptr = alloc(len);
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410 if (*newptr == NULL)
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411 return -1;
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412 method->encode_fn(state, from, len, *newptr);
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413 return (long)len;
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414 }
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415
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416 /*
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417 * Decrypt "ptr[len]" and store the result in a newly allocated buffer, which
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418 * is stored in "newptr".
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419 * Return number of bytes in "newptr", 0 for need more or -1 on error.
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420 */
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421 long
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diff changeset
422 crypt_decode_alloc(
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diff changeset
423 cryptstate_T *state,
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diff changeset
424 char_u *ptr,
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Christian Brabandt <cb@256bit.org>
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diff changeset
425 long len,
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Christian Brabandt <cb@256bit.org>
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426 char_u **newptr)
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427 {
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428 cryptmethod_T *method = &cryptmethods[state->method_nr];
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429
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430 if (method->decode_buffer_fn != NULL)
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431 // Has buffer function, pass through.
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432 return method->decode_buffer_fn(state, ptr, len, newptr);
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parents:
diff changeset
433
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parents:
diff changeset
434 if (len == 0)
18757
c469e1930456 patch 8.1.2368: using old C style comments
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parents: 18498
diff changeset
435 // Not buffering, just return EOF.
6122
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parents:
diff changeset
436 return len;
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parents:
diff changeset
437
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parents:
diff changeset
438 *newptr = alloc(len);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
439 if (*newptr == NULL)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
440 return -1;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
441 method->decode_fn(state, ptr, len, *newptr);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
442 return len;
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parents:
diff changeset
443 }
15531
959cf4c63b18 patch 8.1.0773: not all crypt code is tested
Bram Moolenaar <Bram@vim.org>
parents: 15470
diff changeset
444 #endif
6122
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parents:
diff changeset
445
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
446 /*
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
447 * Encrypting "from[len]" into "to[len]".
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
448 */
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
449 void
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
450 crypt_encode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
451 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
452 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
453 size_t len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
454 char_u *to)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
455 {
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parents:
diff changeset
456 cryptmethods[state->method_nr].encode_fn(state, from, len, to);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
457 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
458
15531
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Bram Moolenaar <Bram@vim.org>
parents: 15470
diff changeset
459 #if 0 // unused
6122
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parents:
diff changeset
460 /*
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
461 * decrypting "from[len]" into "to[len]".
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
462 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
463 void
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
464 crypt_decode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
465 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
466 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
467 size_t len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
468 char_u *to)
6122
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parents:
diff changeset
469 {
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parents:
diff changeset
470 cryptmethods[state->method_nr].decode_fn(state, from, len, to);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
471 }
15531
959cf4c63b18 patch 8.1.0773: not all crypt code is tested
Bram Moolenaar <Bram@vim.org>
parents: 15470
diff changeset
472 #endif
6122
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parents:
diff changeset
473
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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 * Simple inplace encryption, modifies "buf[len]" in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
476 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
477 void
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
478 crypt_encode_inplace(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
479 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
480 char_u *buf,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
481 size_t len)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
482 {
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parents:
diff changeset
483 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
484 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
485
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
486 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
487 * Simple inplace decryption, modifies "buf[len]" in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
488 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
489 void
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
490 crypt_decode_inplace(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
491 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
492 char_u *buf,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
493 size_t len)
6122
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parents:
diff changeset
494 {
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parents:
diff changeset
495 cryptmethods[state->method_nr].decode_inplace_fn(state, buf, len, buf);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
496 }
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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 * Free an allocated crypt key. Clear the text to make sure it doesn't stay
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
500 * in memory anywhere.
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
501 */
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
502 void
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
503 crypt_free_key(char_u *key)
6122
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parents:
diff changeset
504 {
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diff changeset
505 char_u *p;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
506
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
507 if (key != NULL)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
508 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
509 for (p = key; *p != NUL; ++p)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
510 *p = 0;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
511 vim_free(key);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
512 }
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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 /*
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
516 * Check the crypt method and give a warning if it's outdated.
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
517 */
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
518 void
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
519 crypt_check_method(int method)
6353
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parents: 6132
diff changeset
520 {
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
521 if (method < CRYPT_M_BF2)
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
522 {
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
523 msg_scroll = TRUE;
15543
dd725a8ab112 patch 8.1.0779: argument for message functions is inconsistent
Bram Moolenaar <Bram@vim.org>
parents: 15531
diff changeset
524 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
525 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
526 }
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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 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
529 crypt_check_current_method(void)
6353
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
530 {
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
531 crypt_check_method(crypt_get_method_nr(curbuf));
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Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
532 }
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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 /*
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
535 * Ask the user for a crypt key.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
536 * 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
537 * 'key' option value is returned: Don't free it.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
538 * 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
539 * Returns NULL on failure.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
540 */
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
541 char_u *
7817
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
542 crypt_get_key(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
543 int store,
18757
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 18498
diff changeset
544 int twice) // Ask for the key twice.
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
545 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
546 char_u *p1, *p2 = NULL;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
547 int round;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
548
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
549 for (round = 0; ; ++round)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
550 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
551 cmdline_star = TRUE;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
552 cmdline_row = msg_row;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
553 p1 = getcmdline_prompt(NUL, round == 0
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
554 ? (char_u *)_("Enter encryption key: ")
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
555 : (char_u *)_("Enter same key again: "), 0, EXPAND_NOTHING,
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
556 NULL);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
557 cmdline_star = FALSE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
558
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
559 if (p1 == NULL)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
560 break;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
561
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
562 if (round == twice)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
563 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
564 if (p2 != NULL && STRCMP(p1, p2) != 0)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
565 {
15543
dd725a8ab112 patch 8.1.0779: argument for message functions is inconsistent
Bram Moolenaar <Bram@vim.org>
parents: 15531
diff changeset
566 msg(_("Keys don't match!"));
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
567 crypt_free_key(p1);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
568 crypt_free_key(p2);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
569 p2 = NULL;
18757
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 18498
diff changeset
570 round = -1; // do it again
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
571 continue;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
572 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
573
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
574 if (store)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
575 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
576 set_option_value((char_u *)"key", 0L, p1, OPT_LOCAL);
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577 crypt_free_key(p1);
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Bram Moolenaar <bram@vim.org>
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578 p1 = curbuf->b_p_key;
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579 }
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Bram Moolenaar <bram@vim.org>
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580 break;
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Bram Moolenaar <bram@vim.org>
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581 }
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Bram Moolenaar <bram@vim.org>
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582 p2 = p1;
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Bram Moolenaar <bram@vim.org>
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583 }
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Bram Moolenaar <bram@vim.org>
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584
18757
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 18498
diff changeset
585 // since the user typed this, no need to wait for return
6122
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diff changeset
586 if (msg_didout)
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Bram Moolenaar <bram@vim.org>
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587 msg_putchar('\n');
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Bram Moolenaar <bram@vim.org>
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588 need_wait_return = FALSE;
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Bram Moolenaar <bram@vim.org>
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589 msg_didout = FALSE;
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Bram Moolenaar <bram@vim.org>
parents:
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590
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Bram Moolenaar <bram@vim.org>
parents:
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591 crypt_free_key(p2);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
592 return p1;
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593 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
594
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
595
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Bram Moolenaar <bram@vim.org>
parents:
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596 /*
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
597 * Append a message to IObuff for the encryption/decryption method being used.
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
598 */
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Bram Moolenaar <bram@vim.org>
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diff changeset
599 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
600 crypt_append_msg(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
601 buf_T *buf)
6122
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
602 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
603 if (crypt_get_method_nr(buf) == 0)
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
604 STRCAT(IObuff, _("[crypted]"));
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
605 else
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
606 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
607 STRCAT(IObuff, "[");
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
608 STRCAT(IObuff, *buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
609 STRCAT(IObuff, "]");
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
610 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
611 }
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
612
18757
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Bram Moolenaar <Bram@vim.org>
parents: 18498
diff changeset
613 #endif // FEAT_CRYPT