Mercurial > vim
annotate src/crypt.c @ 19694:196dcd448100
Added tag v8.2.0403 for changeset 9fbeb3bdf49e51b60c5eb575d4399ecbff0100b8
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Thu, 19 Mar 2020 12:45:05 +0100 |
| parents | c469e1930456 |
| children | 7e9e53a0368f |
| rev | line source |
|---|---|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 6122 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 | |
| 10 /* | |
| 11 * crypt.c: Generic encryption support. | |
| 12 */ | |
| 13 #include "vim.h" | |
| 14 | |
| 15 #if defined(FEAT_CRYPT) || defined(PROTO) | |
| 16 /* | |
| 17 * Optional encryption support. | |
| 18 * Mohsin Ahmed, mosh@sasi.com, 1998-09-24 | |
| 19 * Based on zip/crypt sources. | |
| 20 * Refactored by David Leadbeater, 2014. | |
| 21 * | |
| 22 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to | |
| 23 * most countries. There are a few exceptions, but that still should not be a | |
| 24 * problem since this code was originally created in Europe and India. | |
| 25 * | |
| 26 * Blowfish addition originally made by Mohsin Ahmed, | |
| 27 * http://www.cs.albany.edu/~mosh 2010-03-14 | |
| 28 * Based on blowfish by Bruce Schneier (http://www.schneier.com/blowfish.html) | |
| 29 * and sha256 by Christophe Devine. | |
| 30 */ | |
| 31 | |
| 32 typedef struct { | |
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33 char *name; // encryption name as used in 'cryptmethod' |
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34 char *magic; // magic bytes stored in file header |
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35 int salt_len; // length of salt, or 0 when not using salt |
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36 int seed_len; // length of seed, or 0 when not using 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 |
| 6122 | 41 |
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42 // Optional function pointer for a self-test. |
| 6122 | 43 int (* self_test_fn)(); |
| 44 | |
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45 // Function pointer for initializing encryption/decryption. |
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46 int (* init_fn)(cryptstate_T *state, char_u *key, |
| 6122 | 47 char_u *salt, int salt_len, char_u *seed, int seed_len); |
| 48 | |
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49 // Function pointers for encoding/decoding from one buffer into another. |
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50 // Optional, however, these or the _buffer ones should be configured. |
| 6122 | 51 void (*encode_fn)(cryptstate_T *state, char_u *from, size_t len, |
| 52 char_u *to); | |
| 53 void (*decode_fn)(cryptstate_T *state, char_u *from, size_t len, | |
| 54 char_u *to); | |
| 55 | |
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56 // Function pointers for encoding and decoding, can buffer data if needed. |
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57 // Optional (however, these or the above should be configured). |
| 6122 | 58 long (*encode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len, |
| 59 char_u **newptr); | |
| 60 long (*decode_buffer_fn)(cryptstate_T *state, char_u *from, size_t len, | |
| 61 char_u **newptr); | |
| 62 | |
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63 // Function pointers for in-place encoding and decoding, used for |
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64 // crypt_*_inplace(). "from" and "to" arguments will be equal. |
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65 // These may be the same as decode_fn and encode_fn above, however an |
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66 // algorithm may implement them in a way that is not interchangeable with |
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67 // the crypt_(en|de)code() interface (for example because it wishes to add |
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68 // padding to files). |
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69 // This method is used for swap and undo files which have a rigid format. |
| 6122 | 70 void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len, |
| 71 char_u *p2); | |
| 72 void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len, | |
| 73 char_u *p2); | |
| 74 } cryptmethod_T; | |
| 75 | |
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76 // index is method_nr of cryptstate_T, CRYPT_M_* |
| 6122 | 77 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = { |
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78 // PK_Zip; very weak |
| 6122 | 79 { |
| 80 "zip", | |
| 81 "VimCrypt~01!", | |
| 82 0, | |
| 83 0, | |
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84 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 85 TRUE, |
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86 #endif |
| 6122 | 87 FALSE, |
| 88 NULL, | |
| 89 crypt_zip_init, | |
| 90 crypt_zip_encode, crypt_zip_decode, | |
| 91 NULL, NULL, | |
| 92 crypt_zip_encode, crypt_zip_decode, | |
| 93 }, | |
| 94 | |
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95 // Blowfish/CFB + SHA-256 custom key derivation; implementation issues. |
| 6122 | 96 { |
| 97 "blowfish", | |
| 98 "VimCrypt~02!", | |
| 99 8, | |
| 100 8, | |
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101 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 102 TRUE, |
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103 #endif |
| 6122 | 104 FALSE, |
| 105 blowfish_self_test, | |
| 106 crypt_blowfish_init, | |
| 107 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 108 NULL, NULL, | |
| 109 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 110 }, | |
| 111 | |
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112 // Blowfish/CFB + SHA-256 custom key derivation; fixed. |
| 6122 | 113 { |
| 114 "blowfish2", | |
| 115 "VimCrypt~03!", | |
| 116 8, | |
| 117 8, | |
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118 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 119 TRUE, |
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120 #endif |
| 6122 | 121 TRUE, |
| 122 blowfish_self_test, | |
| 123 crypt_blowfish_init, | |
| 124 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 125 NULL, NULL, | |
| 126 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 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. |
| 6122 | 131 }; |
| 132 | |
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133 #define CRYPT_MAGIC_LEN 12 // cannot change |
| 6122 | 134 static char crypt_magic_head[] = "VimCrypt~"; |
| 135 | |
| 136 /* | |
| 137 * Return int value for crypt method name. | |
| 138 * 0 for "zip", the old method. Also for any non-valid value. | |
| 139 * 1 for "blowfish". | |
| 140 * 2 for "blowfish2". | |
| 141 */ | |
| 142 int | |
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143 crypt_method_nr_from_name(char_u *name) |
| 6122 | 144 { |
| 145 int i; | |
| 146 | |
| 147 for (i = 0; i < CRYPT_M_COUNT; ++i) | |
| 148 if (STRCMP(name, cryptmethods[i].name) == 0) | |
| 149 return i; | |
| 150 return 0; | |
| 151 } | |
| 152 | |
| 153 /* | |
| 154 * Get the crypt method used for a file from "ptr[len]", the magic text at the | |
| 155 * start of the file. | |
| 156 * Returns -1 when no encryption used. | |
| 157 */ | |
| 158 int | |
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159 crypt_method_nr_from_magic(char *ptr, int len) |
| 6122 | 160 { |
| 161 int i; | |
| 162 | |
| 163 if (len < CRYPT_MAGIC_LEN) | |
| 164 return -1; | |
| 165 | |
| 166 for (i = 0; i < CRYPT_M_COUNT; i++) | |
| 167 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0) | |
| 168 return i; | |
| 169 | |
| 170 i = (int)STRLEN(crypt_magic_head); | |
| 171 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0) | |
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172 emsg(_("E821: File is encrypted with unknown method")); |
| 6122 | 173 |
| 174 return -1; | |
| 175 } | |
| 176 | |
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177 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 178 /* |
| 179 * Return TRUE if the crypt method for "method_nr" can be done in-place. | |
| 180 */ | |
| 181 int | |
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182 crypt_works_inplace(cryptstate_T *state) |
| 6122 | 183 { |
| 184 return cryptmethods[state->method_nr].works_inplace; | |
| 185 } | |
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186 #endif |
| 6122 | 187 |
| 188 /* | |
| 189 * Get the crypt method for buffer "buf" as a number. | |
| 190 */ | |
| 191 int | |
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192 crypt_get_method_nr(buf_T *buf) |
| 6122 | 193 { |
| 194 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm); | |
| 195 } | |
| 196 | |
| 197 /* | |
| 198 * Return TRUE when the buffer uses an encryption method that encrypts the | |
| 199 * whole undo file, not only the text. | |
| 200 */ | |
| 201 int | |
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202 crypt_whole_undofile(int method_nr) |
| 6122 | 203 { |
| 204 return cryptmethods[method_nr].whole_undofile; | |
| 205 } | |
| 206 | |
| 207 /* | |
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208 * Get crypt method specific length of the file header in bytes. |
| 6122 | 209 */ |
| 210 int | |
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211 crypt_get_header_len(int method_nr) |
| 6122 | 212 { |
| 213 return CRYPT_MAGIC_LEN | |
| 214 + cryptmethods[method_nr].salt_len | |
| 215 + cryptmethods[method_nr].seed_len; | |
| 216 } | |
| 217 | |
| 218 /* | |
| 219 * Set the crypt method for buffer "buf" to "method_nr" using the int value as | |
| 220 * returned by crypt_method_nr_from_name(). | |
| 221 */ | |
| 222 void | |
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223 crypt_set_cm_option(buf_T *buf, int method_nr) |
| 6122 | 224 { |
| 225 free_string_option(buf->b_p_cm); | |
| 226 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name); | |
| 227 } | |
| 228 | |
| 229 /* | |
| 230 * If the crypt method for the current buffer has a self-test, run it and | |
| 231 * return OK/FAIL. | |
| 232 */ | |
| 233 int | |
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234 crypt_self_test(void) |
| 6122 | 235 { |
| 236 int method_nr = crypt_get_method_nr(curbuf); | |
| 237 | |
| 238 if (cryptmethods[method_nr].self_test_fn == NULL) | |
| 239 return OK; | |
| 240 return cryptmethods[method_nr].self_test_fn(); | |
| 241 } | |
| 242 | |
| 243 /* | |
| 244 * Allocate a crypt state and initialize it. | |
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245 * Return NULL for failure. |
| 6122 | 246 */ |
| 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) |
| 6122 | 255 { |
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256 cryptstate_T *state = ALLOC_ONE(cryptstate_T); |
| 6122 | 257 |
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258 if (state == NULL) |
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259 return state; |
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260 |
| 6122 | 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 } |
| 6122 | 268 return state; |
| 269 } | |
| 270 | |
| 271 /* | |
| 272 * Allocate a crypt state from a file header and initialize it. | |
| 273 * Assumes that header contains at least the number of bytes that | |
| 274 * crypt_get_header_len() returns for "method_nr". | |
| 275 */ | |
| 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) |
| 6122 | 281 { |
| 282 char_u *salt = NULL; | |
| 283 char_u *seed = NULL; | |
| 284 int salt_len = cryptmethods[method_nr].salt_len; | |
| 285 int seed_len = cryptmethods[method_nr].seed_len; | |
| 286 | |
| 287 if (salt_len > 0) | |
| 288 salt = header + CRYPT_MAGIC_LEN; | |
| 289 if (seed_len > 0) | |
| 290 seed = header + CRYPT_MAGIC_LEN + salt_len; | |
| 291 | |
| 292 return crypt_create(method_nr, key, salt, salt_len, seed, seed_len); | |
| 293 } | |
| 294 | |
| 295 /* | |
| 296 * Read the crypt method specific header data from "fp". | |
| 297 * Return an allocated cryptstate_T or NULL on error. | |
| 298 */ | |
| 299 cryptstate_T * | |
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300 crypt_create_from_file(FILE *fp, char_u *key) |
| 6122 | 301 { |
| 302 int method_nr; | |
| 303 int header_len; | |
| 304 char magic_buffer[CRYPT_MAGIC_LEN]; | |
| 305 char_u *buffer; | |
| 306 cryptstate_T *state; | |
| 307 | |
| 308 if (fread(magic_buffer, CRYPT_MAGIC_LEN, 1, fp) != 1) | |
| 309 return NULL; | |
| 310 method_nr = crypt_method_nr_from_magic(magic_buffer, CRYPT_MAGIC_LEN); | |
| 311 if (method_nr < 0) | |
| 312 return NULL; | |
| 313 | |
| 314 header_len = crypt_get_header_len(method_nr); | |
| 315 if ((buffer = alloc(header_len)) == NULL) | |
| 316 return NULL; | |
| 317 mch_memmove(buffer, magic_buffer, CRYPT_MAGIC_LEN); | |
| 318 if (header_len > CRYPT_MAGIC_LEN | |
| 319 && fread(buffer + CRYPT_MAGIC_LEN, | |
| 320 header_len - CRYPT_MAGIC_LEN, 1, fp) != 1) | |
| 321 { | |
| 322 vim_free(buffer); | |
| 323 return NULL; | |
| 324 } | |
| 325 | |
| 326 state = crypt_create_from_header(method_nr, key, buffer); | |
| 327 vim_free(buffer); | |
| 328 return state; | |
| 329 } | |
| 330 | |
| 331 /* | |
| 332 * Allocate a cryptstate_T for writing and initialize it with "key". | |
| 333 * Allocates and fills in the header and stores it in "header", setting | |
| 334 * "header_len". The header may include salt and seed, depending on | |
| 335 * cryptmethod. Caller must free header. | |
| 336 * Returns the state or NULL on failure. | |
| 337 */ | |
| 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) |
| 6122 | 344 { |
| 345 int len = crypt_get_header_len(method_nr); | |
| 346 char_u *salt = NULL; | |
| 347 char_u *seed = NULL; | |
| 348 int salt_len = cryptmethods[method_nr].salt_len; | |
| 349 int seed_len = cryptmethods[method_nr].seed_len; | |
| 350 cryptstate_T *state; | |
| 351 | |
| 352 *header_len = len; | |
| 353 *header = alloc(len); | |
| 354 if (*header == NULL) | |
| 355 return NULL; | |
| 356 | |
| 357 mch_memmove(*header, cryptmethods[method_nr].magic, CRYPT_MAGIC_LEN); | |
| 358 if (salt_len > 0 || seed_len > 0) | |
| 359 { | |
| 360 if (salt_len > 0) | |
| 361 salt = *header + CRYPT_MAGIC_LEN; | |
| 362 if (seed_len > 0) | |
| 363 seed = *header + CRYPT_MAGIC_LEN + salt_len; | |
| 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. |
| 6122 | 368 sha2_seed(salt, salt_len, seed, seed_len); |
| 369 } | |
| 370 | |
| 371 state = crypt_create(method_nr, key, salt, salt_len, seed, seed_len); | |
| 372 if (state == NULL) | |
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373 VIM_CLEAR(*header); |
| 6122 | 374 return state; |
| 375 } | |
| 376 | |
| 377 /* | |
| 378 * Free the crypt state. | |
| 379 */ | |
| 380 void | |
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381 crypt_free_state(cryptstate_T *state) |
| 6122 | 382 { |
| 383 vim_free(state->method_state); | |
| 384 vim_free(state); | |
| 385 } | |
| 386 | |
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387 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 388 /* |
| 389 * Encode "from[len]" and store the result in a newly allocated buffer, which | |
| 390 * is stored in "newptr". | |
| 391 * Return number of bytes in "newptr", 0 for need more or -1 on error. | |
| 392 */ | |
| 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) |
| 6122 | 399 { |
| 400 cryptmethod_T *method = &cryptmethods[state->method_nr]; | |
| 401 | |
| 402 if (method->encode_buffer_fn != NULL) | |
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403 // Has buffer function, pass through. |
| 6122 | 404 return method->encode_buffer_fn(state, from, len, newptr); |
| 405 if (len == 0) | |
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406 // Not buffering, just return EOF. |
| 6132 | 407 return (long)len; |
| 6122 | 408 |
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409 *newptr = alloc(len); |
| 6122 | 410 if (*newptr == NULL) |
| 411 return -1; | |
| 412 method->encode_fn(state, from, len, *newptr); | |
| 6132 | 413 return (long)len; |
| 6122 | 414 } |
| 415 | |
| 416 /* | |
| 417 * Decrypt "ptr[len]" and store the result in a newly allocated buffer, which | |
| 418 * is stored in "newptr". | |
| 419 * Return number of bytes in "newptr", 0 for need more or -1 on error. | |
| 420 */ | |
| 421 long | |
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422 crypt_decode_alloc( |
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423 cryptstate_T *state, |
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424 char_u *ptr, |
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425 long len, |
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426 char_u **newptr) |
| 6122 | 427 { |
| 428 cryptmethod_T *method = &cryptmethods[state->method_nr]; | |
| 429 | |
| 430 if (method->decode_buffer_fn != NULL) | |
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431 // Has buffer function, pass through. |
| 6122 | 432 return method->decode_buffer_fn(state, ptr, len, newptr); |
| 433 | |
| 434 if (len == 0) | |
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435 // Not buffering, just return EOF. |
| 6122 | 436 return len; |
| 437 | |
| 438 *newptr = alloc(len); | |
| 439 if (*newptr == NULL) | |
| 440 return -1; | |
| 441 method->decode_fn(state, ptr, len, *newptr); | |
| 442 return len; | |
| 443 } | |
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444 #endif |
| 6122 | 445 |
| 446 /* | |
| 447 * Encrypting "from[len]" into "to[len]". | |
| 448 */ | |
| 449 void | |
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450 crypt_encode( |
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451 cryptstate_T *state, |
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452 char_u *from, |
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453 size_t len, |
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454 char_u *to) |
| 6122 | 455 { |
| 456 cryptmethods[state->method_nr].encode_fn(state, from, len, to); | |
| 457 } | |
| 458 | |
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459 #if 0 // unused |
| 6122 | 460 /* |
| 461 * decrypting "from[len]" into "to[len]". | |
| 462 */ | |
| 463 void | |
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464 crypt_decode( |
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465 cryptstate_T *state, |
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466 char_u *from, |
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467 size_t len, |
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468 char_u *to) |
| 6122 | 469 { |
| 470 cryptmethods[state->method_nr].decode_fn(state, from, len, to); | |
| 471 } | |
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472 #endif |
| 6122 | 473 |
| 474 /* | |
| 475 * Simple inplace encryption, modifies "buf[len]" in place. | |
| 476 */ | |
| 477 void | |
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478 crypt_encode_inplace( |
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479 cryptstate_T *state, |
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480 char_u *buf, |
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481 size_t len) |
| 6122 | 482 { |
| 483 cryptmethods[state->method_nr].encode_inplace_fn(state, buf, len, buf); | |
| 484 } | |
| 485 | |
| 486 /* | |
| 487 * Simple inplace decryption, modifies "buf[len]" in place. | |
| 488 */ | |
| 489 void | |
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490 crypt_decode_inplace( |
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491 cryptstate_T *state, |
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492 char_u *buf, |
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493 size_t len) |
| 6122 | 494 { |
| 495 cryptmethods[state->method_nr].decode_inplace_fn(state, buf, len, buf); | |
| 496 } | |
| 497 | |
| 498 /* | |
| 499 * Free an allocated crypt key. Clear the text to make sure it doesn't stay | |
| 500 * in memory anywhere. | |
| 501 */ | |
| 502 void | |
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503 crypt_free_key(char_u *key) |
| 6122 | 504 { |
| 505 char_u *p; | |
| 506 | |
| 507 if (key != NULL) | |
| 508 { | |
| 509 for (p = key; *p != NUL; ++p) | |
| 510 *p = 0; | |
| 511 vim_free(key); | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 /* | |
| 6353 | 516 * Check the crypt method and give a warning if it's outdated. |
| 517 */ | |
| 518 void | |
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519 crypt_check_method(int method) |
| 6353 | 520 { |
| 521 if (method < CRYPT_M_BF2) | |
| 522 { | |
| 523 msg_scroll = TRUE; | |
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524 msg(_("Warning: Using a weak encryption method; see :help 'cm'")); |
| 6353 | 525 } |
| 526 } | |
| 527 | |
| 528 void | |
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529 crypt_check_current_method(void) |
| 6353 | 530 { |
| 531 crypt_check_method(crypt_get_method_nr(curbuf)); | |
| 532 } | |
| 533 | |
| 534 /* | |
| 6122 | 535 * Ask the user for a crypt key. |
| 536 * When "store" is TRUE, the new key is stored in the 'key' option, and the | |
| 537 * 'key' option value is returned: Don't free it. | |
| 538 * When "store" is FALSE, the typed key is returned in allocated memory. | |
| 539 * Returns NULL on failure. | |
| 540 */ | |
| 541 char_u * | |
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542 crypt_get_key( |
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commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
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543 int store, |
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544 int twice) // Ask for the key twice. |
| 6122 | 545 { |
| 546 char_u *p1, *p2 = NULL; | |
| 547 int round; | |
| 548 | |
| 549 for (round = 0; ; ++round) | |
| 550 { | |
| 551 cmdline_star = TRUE; | |
| 552 cmdline_row = msg_row; | |
| 553 p1 = getcmdline_prompt(NUL, round == 0 | |
| 554 ? (char_u *)_("Enter encryption key: ") | |
| 555 : (char_u *)_("Enter same key again: "), 0, EXPAND_NOTHING, | |
| 556 NULL); | |
| 557 cmdline_star = FALSE; | |
| 558 | |
| 559 if (p1 == NULL) | |
| 560 break; | |
| 561 | |
| 562 if (round == twice) | |
| 563 { | |
| 564 if (p2 != NULL && STRCMP(p1, p2) != 0) | |
| 565 { | |
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566 msg(_("Keys don't match!")); |
| 6122 | 567 crypt_free_key(p1); |
| 568 crypt_free_key(p2); | |
| 569 p2 = NULL; | |
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570 round = -1; // do it again |
| 6122 | 571 continue; |
| 572 } | |
| 573 | |
| 574 if (store) | |
| 575 { | |
| 576 set_option_value((char_u *)"key", 0L, p1, OPT_LOCAL); | |
| 577 crypt_free_key(p1); | |
| 578 p1 = curbuf->b_p_key; | |
| 579 } | |
| 580 break; | |
| 581 } | |
| 582 p2 = p1; | |
| 583 } | |
| 584 | |
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585 // since the user typed this, no need to wait for return |
| 6122 | 586 if (msg_didout) |
| 587 msg_putchar('\n'); | |
| 588 need_wait_return = FALSE; | |
| 589 msg_didout = FALSE; | |
| 590 | |
| 591 crypt_free_key(p2); | |
| 592 return p1; | |
| 593 } | |
| 594 | |
| 595 | |
| 596 /* | |
| 597 * Append a message to IObuff for the encryption/decryption method being used. | |
| 598 */ | |
| 599 void | |
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commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
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600 crypt_append_msg( |
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commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
6353
diff
changeset
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601 buf_T *buf) |
| 6122 | 602 { |
| 603 if (crypt_get_method_nr(buf) == 0) | |
| 604 STRCAT(IObuff, _("[crypted]")); | |
| 605 else | |
| 606 { | |
| 607 STRCAT(IObuff, "["); | |
| 608 STRCAT(IObuff, *buf->b_p_cm == NUL ? p_cm : buf->b_p_cm); | |
| 609 STRCAT(IObuff, "]"); | |
| 610 } | |
| 611 } | |
| 612 | |
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613 #endif // FEAT_CRYPT |