annotate src/crypt.c @ 11552:d41c3729fd96

Added tag v8.0.0658 for changeset 7798e9bcdb13fdc4af832ca6d979a593ad4d5863
author Christian Brabandt <cb@256bit.org>
date Thu, 22 Jun 2017 21:45:05 +0200
parents 4aead6a9b7a9
children ac42c4b11dbc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 int works_inplace; /* encryption/decryption can be done in-place */
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38 int whole_undofile; /* whole undo file is encrypted */
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39
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40 /* Optional function pointer for a self-test. */
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41 int (* self_test_fn)();
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42
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43 /* Function pointer for initializing encryption/decription. */
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44 void (* init_fn)(cryptstate_T *state, char_u *key,
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45 char_u *salt, int salt_len, char_u *seed, int seed_len);
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46
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47 /* Function pointers for encoding/decoding from one buffer into another.
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48 * Optional, however, these or the _buffer ones should be configured. */
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49 void (*encode_fn)(cryptstate_T *state, char_u *from, size_t len,
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50 char_u *to);
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51 void (*decode_fn)(cryptstate_T *state, char_u *from, size_t len,
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52 char_u *to);
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53
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54 /* Function pointers for encoding and decoding, can buffer data if needed.
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55 * Optional (however, these or the above should be configured). */
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56 long (*encode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len,
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57 char_u **newptr);
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58 long (*decode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len,
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59 char_u **newptr);
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60
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61 /* Function pointers for in-place encoding and decoding, used for
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62 * crypt_*_inplace(). "from" and "to" arguments will be equal.
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63 * These may be the same as decode_fn and encode_fn above, however an
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64 * algorithm may implement them in a way that is not interchangeable with
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65 * the crypt_(en|de)code() interface (for example because it wishes to add
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66 * padding to files).
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67 * This method is used for swap and undo files which have a rigid format.
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68 */
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69 void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
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70 char_u *p2);
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71 void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len,
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72 char_u *p2);
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73 } cryptmethod_T;
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74
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75 /* index is method_nr of cryptstate_T, CRYPT_M_* */
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76 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = {
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77 /* PK_Zip; very weak */
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78 {
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79 "zip",
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80 "VimCrypt~01!",
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81 0,
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82 0,
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83 TRUE,
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84 FALSE,
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85 NULL,
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86 crypt_zip_init,
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87 crypt_zip_encode, crypt_zip_decode,
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88 NULL, NULL,
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89 crypt_zip_encode, crypt_zip_decode,
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90 },
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91
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92 /* Blowfish/CFB + SHA-256 custom key derivation; implementation issues. */
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93 {
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94 "blowfish",
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95 "VimCrypt~02!",
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96 8,
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97 8,
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98 TRUE,
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99 FALSE,
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100 blowfish_self_test,
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101 crypt_blowfish_init,
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102 crypt_blowfish_encode, crypt_blowfish_decode,
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103 NULL, NULL,
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104 crypt_blowfish_encode, crypt_blowfish_decode,
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105 },
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106
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107 /* Blowfish/CFB + SHA-256 custom key derivation; fixed. */
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108 {
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109 "blowfish2",
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110 "VimCrypt~03!",
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111 8,
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112 8,
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113 TRUE,
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114 TRUE,
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115 blowfish_self_test,
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116 crypt_blowfish_init,
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117 crypt_blowfish_encode, crypt_blowfish_decode,
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118 NULL, NULL,
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119 crypt_blowfish_encode, crypt_blowfish_decode,
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120 },
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121 };
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122
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123 #define CRYPT_MAGIC_LEN 12 /* cannot change */
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124 static char crypt_magic_head[] = "VimCrypt~";
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125
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126 /*
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127 * Return int value for crypt method name.
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128 * 0 for "zip", the old method. Also for any non-valid value.
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129 * 1 for "blowfish".
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130 * 2 for "blowfish2".
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131 */
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132 int
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133 crypt_method_nr_from_name(char_u *name)
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134 {
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135 int i;
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136
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137 for (i = 0; i < CRYPT_M_COUNT; ++i)
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138 if (STRCMP(name, cryptmethods[i].name) == 0)
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139 return i;
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140 return 0;
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141 }
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142
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143 /*
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144 * Get the crypt method used for a file from "ptr[len]", the magic text at the
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145 * start of the file.
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146 * Returns -1 when no encryption used.
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147 */
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148 int
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149 crypt_method_nr_from_magic(char *ptr, int len)
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150 {
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151 int i;
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152
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153 if (len < CRYPT_MAGIC_LEN)
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154 return -1;
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155
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156 for (i = 0; i < CRYPT_M_COUNT; i++)
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157 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0)
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158 return i;
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159
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160 i = (int)STRLEN(crypt_magic_head);
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161 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0)
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162 EMSG(_("E821: File is encrypted with unknown method"));
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163
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164 return -1;
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165 }
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166
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167 /*
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168 * Return TRUE if the crypt method for "method_nr" can be done in-place.
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169 */
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170 int
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171 crypt_works_inplace(cryptstate_T *state)
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172 {
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173 return cryptmethods[state->method_nr].works_inplace;
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174 }
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175
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176 /*
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177 * Get the crypt method for buffer "buf" as a number.
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178 */
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179 int
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180 crypt_get_method_nr(buf_T *buf)
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181 {
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182 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
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183 }
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184
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185 /*
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186 * Return TRUE when the buffer uses an encryption method that encrypts the
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187 * whole undo file, not only the text.
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188 */
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189 int
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190 crypt_whole_undofile(int method_nr)
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191 {
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192 return cryptmethods[method_nr].whole_undofile;
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193 }
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194
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195 /*
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196 * Get crypt method specifc length of the file header in bytes.
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197 */
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198 int
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199 crypt_get_header_len(int method_nr)
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200 {
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201 return CRYPT_MAGIC_LEN
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202 + cryptmethods[method_nr].salt_len
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203 + cryptmethods[method_nr].seed_len;
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204 }
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205
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206 /*
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207 * Set the crypt method for buffer "buf" to "method_nr" using the int value as
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208 * returned by crypt_method_nr_from_name().
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209 */
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210 void
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211 crypt_set_cm_option(buf_T *buf, int method_nr)
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212 {
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213 free_string_option(buf->b_p_cm);
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214 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name);
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215 }
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216
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217 /*
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218 * If the crypt method for the current buffer has a self-test, run it and
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219 * return OK/FAIL.
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220 */
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221 int
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222 crypt_self_test(void)
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223 {
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224 int method_nr = crypt_get_method_nr(curbuf);
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225
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226 if (cryptmethods[method_nr].self_test_fn == NULL)
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227 return OK;
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228 return cryptmethods[method_nr].self_test_fn();
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229 }
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230
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231 /*
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232 * Allocate a crypt state and initialize it.
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233 */
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234 cryptstate_T *
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235 crypt_create(
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236 int method_nr,
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237 char_u *key,
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238 char_u *salt,
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239 int salt_len,
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240 char_u *seed,
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241 int seed_len)
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242 {
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243 cryptstate_T *state = (cryptstate_T *)alloc((int)sizeof(cryptstate_T));
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244
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245 state->method_nr = method_nr;
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246 cryptmethods[method_nr].init_fn(state, key, salt, salt_len, seed, seed_len);
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247 return state;
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248 }
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249
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250 /*
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251 * Allocate a crypt state from a file header and initialize it.
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252 * Assumes that header contains at least the number of bytes that
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253 * crypt_get_header_len() returns for "method_nr".
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254 */
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255 cryptstate_T *
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256 crypt_create_from_header(
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257 int method_nr,
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258 char_u *key,
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259 char_u *header)
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260 {
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261 char_u *salt = NULL;
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262 char_u *seed = NULL;
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263 int salt_len = cryptmethods[method_nr].salt_len;
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264 int seed_len = cryptmethods[method_nr].seed_len;
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265
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266 if (salt_len > 0)
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267 salt = header + CRYPT_MAGIC_LEN;
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268 if (seed_len > 0)
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269 seed = header + CRYPT_MAGIC_LEN + salt_len;
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270
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271 return crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
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272 }
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273
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274 /*
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275 * Read the crypt method specific header data from "fp".
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276 * Return an allocated cryptstate_T or NULL on error.
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277 */
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278 cryptstate_T *
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279 crypt_create_from_file(FILE *fp, char_u *key)
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280 {
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281 int method_nr;
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282 int header_len;
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283 char magic_buffer[CRYPT_MAGIC_LEN];
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284 char_u *buffer;
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285 cryptstate_T *state;
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286
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287 if (fread(magic_buffer, CRYPT_MAGIC_LEN, 1, fp) != 1)
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288 return NULL;
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289 method_nr = crypt_method_nr_from_magic(magic_buffer, CRYPT_MAGIC_LEN);
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290 if (method_nr < 0)
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291 return NULL;
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292
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293 header_len = crypt_get_header_len(method_nr);
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294 if ((buffer = alloc(header_len)) == NULL)
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295 return NULL;
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296 mch_memmove(buffer, magic_buffer, CRYPT_MAGIC_LEN);
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297 if (header_len > CRYPT_MAGIC_LEN
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298 && fread(buffer + CRYPT_MAGIC_LEN,
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299 header_len - CRYPT_MAGIC_LEN, 1, fp) != 1)
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300 {
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301 vim_free(buffer);
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302 return NULL;
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303 }
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304
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305 state = crypt_create_from_header(method_nr, key, buffer);
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306 vim_free(buffer);
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307 return state;
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308 }
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309
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310 /*
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311 * Allocate a cryptstate_T for writing and initialize it with "key".
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312 * Allocates and fills in the header and stores it in "header", setting
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313 * "header_len". The header may include salt and seed, depending on
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314 * cryptmethod. Caller must free header.
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315 * Returns the state or NULL on failure.
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316 */
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317 cryptstate_T *
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318 crypt_create_for_writing(
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319 int method_nr,
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320 char_u *key,
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321 char_u **header,
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322 int *header_len)
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323 {
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324 int len = crypt_get_header_len(method_nr);
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325 char_u *salt = NULL;
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326 char_u *seed = NULL;
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327 int salt_len = cryptmethods[method_nr].salt_len;
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328 int seed_len = cryptmethods[method_nr].seed_len;
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329 cryptstate_T *state;
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330
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331 *header_len = len;
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332 *header = alloc(len);
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333 if (*header == NULL)
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334 return NULL;
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335
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336 mch_memmove(*header, cryptmethods[method_nr].magic, CRYPT_MAGIC_LEN);
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337 if (salt_len > 0 || seed_len > 0)
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338 {
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339 if (salt_len > 0)
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340 salt = *header + CRYPT_MAGIC_LEN;
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341 if (seed_len > 0)
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342 seed = *header + CRYPT_MAGIC_LEN + salt_len;
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343
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344 /* TODO: Should this be crypt method specific? (Probably not worth
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345 * it). sha2_seed is pretty bad for large amounts of entropy, so make
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346 * that into something which is suitable for anything. */
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347 sha2_seed(salt, salt_len, seed, seed_len);
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348 }
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349
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350 state = crypt_create(method_nr, key, salt, salt_len, seed, seed_len);
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351 if (state == NULL)
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352 {
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353 vim_free(*header);
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354 *header = NULL;
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355 }
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356 return state;
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357 }
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358
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359 /*
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360 * Free the crypt state.
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361 */
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362 void
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363 crypt_free_state(cryptstate_T *state)
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364 {
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365 vim_free(state->method_state);
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366 vim_free(state);
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367 }
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368
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369 /*
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370 * Encode "from[len]" and store the result in a newly allocated buffer, which
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371 * is stored in "newptr".
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372 * Return number of bytes in "newptr", 0 for need more or -1 on error.
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373 */
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374 long
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375 crypt_encode_alloc(
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376 cryptstate_T *state,
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377 char_u *from,
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378 size_t len,
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379 char_u **newptr)
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380 {
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381 cryptmethod_T *method = &cryptmethods[state->method_nr];
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382
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383 if (method->encode_buffer_fn != NULL)
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384 /* Has buffer function, pass through. */
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385 return method->encode_buffer_fn(state, from, len, newptr);
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386 if (len == 0)
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387 /* Not buffering, just return EOF. */
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388 return (long)len;
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389
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390 *newptr = alloc((long)len);
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391 if (*newptr == NULL)
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392 return -1;
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393 method->encode_fn(state, from, len, *newptr);
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394 return (long)len;
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395 }
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396
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397 /*
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398 * Decrypt "ptr[len]" and store the result in a newly allocated buffer, which
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399 * is stored in "newptr".
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400 * Return number of bytes in "newptr", 0 for need more or -1 on error.
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diff changeset
401 */
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402 long
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diff changeset
403 crypt_decode_alloc(
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diff changeset
404 cryptstate_T *state,
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
405 char_u *ptr,
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Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
406 long len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
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407 char_u **newptr)
6122
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408 {
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409 cryptmethod_T *method = &cryptmethods[state->method_nr];
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410
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411 if (method->decode_buffer_fn != NULL)
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412 /* Has buffer function, pass through. */
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413 return method->decode_buffer_fn(state, ptr, len, newptr);
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414
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415 if (len == 0)
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416 /* Not buffering, just return EOF. */
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417 return len;
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418
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419 *newptr = alloc(len);
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420 if (*newptr == NULL)
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421 return -1;
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422 method->decode_fn(state, ptr, len, *newptr);
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423 return len;
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424 }
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425
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426 /*
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427 * Encrypting "from[len]" into "to[len]".
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428 */
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429 void
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430 crypt_encode(
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431 cryptstate_T *state,
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432 char_u *from,
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Christian Brabandt <cb@256bit.org>
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diff changeset
433 size_t len,
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Christian Brabandt <cb@256bit.org>
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434 char_u *to)
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435 {
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436 cryptmethods[state->method_nr].encode_fn(state, from, len, to);
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437 }
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diff changeset
438
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
439 /*
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440 * decrypting "from[len]" into "to[len]".
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441 */
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diff changeset
442 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
443 crypt_decode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
444 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
445 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
446 size_t len,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
447 char_u *to)
6122
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 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
450 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
451
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
452 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
453 * Simple inplace encryption, modifies "buf[len]" in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
454 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
455 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
456 crypt_encode_inplace(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
457 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
458 char_u *buf,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
459 size_t len)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
460 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
461 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
462 }
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 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
465 * Simple inplace decryption, modifies "buf[len]" in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
466 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
467 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
468 crypt_decode_inplace(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
469 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
470 char_u *buf,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
471 size_t len)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
472 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
473 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
474 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
475
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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 * 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
478 * in memory anywhere.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
479 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
480 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
481 crypt_free_key(char_u *key)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
482 {
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
483 char_u *p;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
484
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
485 if (key != NULL)
18ac55444b37 updated for version 7.4.399
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 for (p = key; *p != NUL; ++p)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
488 *p = 0;
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
489 vim_free(key);
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Bram Moolenaar <bram@vim.org>
parents:
diff changeset
490 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
491 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
492
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
493 /*
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
494 * 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
495 */
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
496 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
497 crypt_check_method(int method)
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
498 {
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
499 if (method < CRYPT_M_BF2)
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
500 {
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
501 msg_scroll = TRUE;
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
502 MSG(_("Warning: Using a weak encryption method; see :help 'cm'"));
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
503 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
504 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
505
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
506 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
507 crypt_check_current_method(void)
6353
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
508 {
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
509 crypt_check_method(crypt_get_method_nr(curbuf));
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
510 }
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
511
60659773c73b updated for version 7.4.509
Bram Moolenaar <bram@vim.org>
parents: 6132
diff changeset
512 /*
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
513 * Ask the user for a crypt key.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
514 * 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
515 * 'key' option value is returned: Don't free it.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
516 * 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
517 * Returns NULL on failure.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
518 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
519 char_u *
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
520 crypt_get_key(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
521 int store,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
522 int twice) /* Ask for the key twice. */
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
523 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
524 char_u *p1, *p2 = NULL;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
525 int round;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
526
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
527 for (round = 0; ; ++round)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
528 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
529 cmdline_star = TRUE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
530 cmdline_row = msg_row;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
531 p1 = getcmdline_prompt(NUL, round == 0
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
532 ? (char_u *)_("Enter encryption key: ")
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
533 : (char_u *)_("Enter same key again: "), 0, EXPAND_NOTHING,
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
534 NULL);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
535 cmdline_star = FALSE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
536
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
537 if (p1 == NULL)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
538 break;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
539
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
540 if (round == twice)
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 if (p2 != NULL && STRCMP(p1, p2) != 0)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
543 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
544 MSG(_("Keys don't match!"));
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
545 crypt_free_key(p1);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
546 crypt_free_key(p2);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
547 p2 = NULL;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
548 round = -1; /* do it again */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
549 continue;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
550 }
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 if (store)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
553 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
554 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
555 crypt_free_key(p1);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
556 p1 = curbuf->b_p_key;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
557 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
558 break;
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 p2 = p1;
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
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
563 /* since the user typed this, no need to wait for return */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
564 if (msg_didout)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
565 msg_putchar('\n');
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
566 need_wait_return = FALSE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
567 msg_didout = FALSE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
568
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 return p1;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
571 }
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
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 * Append a message to IObuff for the encryption/decryption method being used.
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 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
578 crypt_append_msg(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 6353
diff changeset
579 buf_T *buf)
6122
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 if (crypt_get_method_nr(buf) == 0)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
582 STRCAT(IObuff, _("[crypted]"));
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
583 else
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
584 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
585 STRCAT(IObuff, "[");
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
586 STRCAT(IObuff, *buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
587 STRCAT(IObuff, "]");
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
588 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
589 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
590
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
591 #endif /* FEAT_CRYPT */