Mercurial > vim
annotate src/crypt.c @ 15622:f01d2f68a488
Added tag v8.1.0818 for changeset bfbdef46aa7d6418c26a6409e96d288482879204
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Thu, 24 Jan 2019 23:15:05 +0100 |
| parents | dd725a8ab112 |
| children | ddd82b1c9e9d |
| 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| 26 * Blowfish addition originally made by Mohsin Ahmed, | |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 { | |
| 33 char *name; /* encryption name as used in 'cryptmethod' */ | |
| 34 char *magic; /* magic bytes stored in file header */ | |
| 35 int salt_len; /* length of salt, or 0 when not using salt */ | |
| 36 int seed_len; /* length of seed, or 0 when not using salt */ | |
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37 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 38 int works_inplace; /* encryption/decryption can be done in-place */ |
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39 #endif |
| 6122 | 40 int whole_undofile; /* whole undo file is encrypted */ |
| 41 | |
| 42 /* Optional function pointer for a self-test. */ | |
| 43 int (* self_test_fn)(); | |
| 44 | |
| 45 /* Function pointer for initializing encryption/decription. */ | |
| 46 void (* init_fn)(cryptstate_T *state, char_u *key, | |
| 47 char_u *salt, int salt_len, char_u *seed, int seed_len); | |
| 48 | |
| 49 /* Function pointers for encoding/decoding from one buffer into another. | |
| 50 * Optional, however, these or the _buffer ones should be configured. */ | |
| 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 | |
| 56 /* Function pointers for encoding and decoding, can buffer data if needed. | |
| 57 * Optional (however, these or the above should be configured). */ | |
| 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 | |
| 63 /* Function pointers for in-place encoding and decoding, used for | |
| 64 * crypt_*_inplace(). "from" and "to" arguments will be equal. | |
| 65 * These may be the same as decode_fn and encode_fn above, however an | |
| 66 * algorithm may implement them in a way that is not interchangeable with | |
| 67 * the crypt_(en|de)code() interface (for example because it wishes to add | |
| 68 * padding to files). | |
| 69 * This method is used for swap and undo files which have a rigid format. | |
| 70 */ | |
| 71 void (*encode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len, | |
| 72 char_u *p2); | |
| 73 void (*decode_inplace_fn)(cryptstate_T *state, char_u *p1, size_t len, | |
| 74 char_u *p2); | |
| 75 } cryptmethod_T; | |
| 76 | |
| 77 /* index is method_nr of cryptstate_T, CRYPT_M_* */ | |
| 78 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = { | |
| 79 /* PK_Zip; very weak */ | |
| 80 { | |
| 81 "zip", | |
| 82 "VimCrypt~01!", | |
| 83 0, | |
| 84 0, | |
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85 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 86 TRUE, |
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87 #endif |
| 6122 | 88 FALSE, |
| 89 NULL, | |
| 90 crypt_zip_init, | |
| 91 crypt_zip_encode, crypt_zip_decode, | |
| 92 NULL, NULL, | |
| 93 crypt_zip_encode, crypt_zip_decode, | |
| 94 }, | |
| 95 | |
| 96 /* Blowfish/CFB + SHA-256 custom key derivation; implementation issues. */ | |
| 97 { | |
| 98 "blowfish", | |
| 99 "VimCrypt~02!", | |
| 100 8, | |
| 101 8, | |
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102 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 103 TRUE, |
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104 #endif |
| 6122 | 105 FALSE, |
| 106 blowfish_self_test, | |
| 107 crypt_blowfish_init, | |
| 108 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 109 NULL, NULL, | |
| 110 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 111 }, | |
| 112 | |
| 113 /* Blowfish/CFB + SHA-256 custom key derivation; fixed. */ | |
| 114 { | |
| 115 "blowfish2", | |
| 116 "VimCrypt~03!", | |
| 117 8, | |
| 118 8, | |
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119 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 120 TRUE, |
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121 #endif |
| 6122 | 122 TRUE, |
| 123 blowfish_self_test, | |
| 124 crypt_blowfish_init, | |
| 125 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 126 NULL, NULL, | |
| 127 crypt_blowfish_encode, crypt_blowfish_decode, | |
| 128 }, | |
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129 |
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130 /* NOTE: when adding a new method, use some random bytes for the magic key, |
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131 * to avoid that a text file is recognized as encrypted. */ |
| 6122 | 132 }; |
| 133 | |
| 134 #define CRYPT_MAGIC_LEN 12 /* cannot change */ | |
| 135 static char crypt_magic_head[] = "VimCrypt~"; | |
| 136 | |
| 137 /* | |
| 138 * Return int value for crypt method name. | |
| 139 * 0 for "zip", the old method. Also for any non-valid value. | |
| 140 * 1 for "blowfish". | |
| 141 * 2 for "blowfish2". | |
| 142 */ | |
| 143 int | |
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144 crypt_method_nr_from_name(char_u *name) |
| 6122 | 145 { |
| 146 int i; | |
| 147 | |
| 148 for (i = 0; i < CRYPT_M_COUNT; ++i) | |
| 149 if (STRCMP(name, cryptmethods[i].name) == 0) | |
| 150 return i; | |
| 151 return 0; | |
| 152 } | |
| 153 | |
| 154 /* | |
| 155 * Get the crypt method used for a file from "ptr[len]", the magic text at the | |
| 156 * start of the file. | |
| 157 * Returns -1 when no encryption used. | |
| 158 */ | |
| 159 int | |
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160 crypt_method_nr_from_magic(char *ptr, int len) |
| 6122 | 161 { |
| 162 int i; | |
| 163 | |
| 164 if (len < CRYPT_MAGIC_LEN) | |
| 165 return -1; | |
| 166 | |
| 167 for (i = 0; i < CRYPT_M_COUNT; i++) | |
| 168 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0) | |
| 169 return i; | |
| 170 | |
| 171 i = (int)STRLEN(crypt_magic_head); | |
| 172 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0) | |
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173 emsg(_("E821: File is encrypted with unknown method")); |
| 6122 | 174 |
| 175 return -1; | |
| 176 } | |
| 177 | |
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178 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 179 /* |
| 180 * Return TRUE if the crypt method for "method_nr" can be done in-place. | |
| 181 */ | |
| 182 int | |
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183 crypt_works_inplace(cryptstate_T *state) |
| 6122 | 184 { |
| 185 return cryptmethods[state->method_nr].works_inplace; | |
| 186 } | |
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187 #endif |
| 6122 | 188 |
| 189 /* | |
| 190 * Get the crypt method for buffer "buf" as a number. | |
| 191 */ | |
| 192 int | |
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193 crypt_get_method_nr(buf_T *buf) |
| 6122 | 194 { |
| 195 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm); | |
| 196 } | |
| 197 | |
| 198 /* | |
| 199 * Return TRUE when the buffer uses an encryption method that encrypts the | |
| 200 * whole undo file, not only the text. | |
| 201 */ | |
| 202 int | |
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203 crypt_whole_undofile(int method_nr) |
| 6122 | 204 { |
| 205 return cryptmethods[method_nr].whole_undofile; | |
| 206 } | |
| 207 | |
| 208 /* | |
| 209 * Get crypt method specifc length of the file header in bytes. | |
| 210 */ | |
| 211 int | |
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212 crypt_get_header_len(int method_nr) |
| 6122 | 213 { |
| 214 return CRYPT_MAGIC_LEN | |
| 215 + cryptmethods[method_nr].salt_len | |
| 216 + cryptmethods[method_nr].seed_len; | |
| 217 } | |
| 218 | |
| 219 /* | |
| 220 * Set the crypt method for buffer "buf" to "method_nr" using the int value as | |
| 221 * returned by crypt_method_nr_from_name(). | |
| 222 */ | |
| 223 void | |
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224 crypt_set_cm_option(buf_T *buf, int method_nr) |
| 6122 | 225 { |
| 226 free_string_option(buf->b_p_cm); | |
| 227 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name); | |
| 228 } | |
| 229 | |
| 230 /* | |
| 231 * If the crypt method for the current buffer has a self-test, run it and | |
| 232 * return OK/FAIL. | |
| 233 */ | |
| 234 int | |
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235 crypt_self_test(void) |
| 6122 | 236 { |
| 237 int method_nr = crypt_get_method_nr(curbuf); | |
| 238 | |
| 239 if (cryptmethods[method_nr].self_test_fn == NULL) | |
| 240 return OK; | |
| 241 return cryptmethods[method_nr].self_test_fn(); | |
| 242 } | |
| 243 | |
| 244 /* | |
| 245 * Allocate a crypt state and initialize it. | |
| 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 { |
| 256 cryptstate_T *state = (cryptstate_T *)alloc((int)sizeof(cryptstate_T)); | |
| 257 | |
| 258 state->method_nr = method_nr; | |
| 259 cryptmethods[method_nr].init_fn(state, key, salt, salt_len, seed, seed_len); | |
| 260 return state; | |
| 261 } | |
| 262 | |
| 263 /* | |
| 264 * Allocate a crypt state from a file header and initialize it. | |
| 265 * Assumes that header contains at least the number of bytes that | |
| 266 * crypt_get_header_len() returns for "method_nr". | |
| 267 */ | |
| 268 cryptstate_T * | |
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269 crypt_create_from_header( |
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270 int method_nr, |
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271 char_u *key, |
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272 char_u *header) |
| 6122 | 273 { |
| 274 char_u *salt = NULL; | |
| 275 char_u *seed = NULL; | |
| 276 int salt_len = cryptmethods[method_nr].salt_len; | |
| 277 int seed_len = cryptmethods[method_nr].seed_len; | |
| 278 | |
| 279 if (salt_len > 0) | |
| 280 salt = header + CRYPT_MAGIC_LEN; | |
| 281 if (seed_len > 0) | |
| 282 seed = header + CRYPT_MAGIC_LEN + salt_len; | |
| 283 | |
| 284 return crypt_create(method_nr, key, salt, salt_len, seed, seed_len); | |
| 285 } | |
| 286 | |
| 287 /* | |
| 288 * Read the crypt method specific header data from "fp". | |
| 289 * Return an allocated cryptstate_T or NULL on error. | |
| 290 */ | |
| 291 cryptstate_T * | |
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292 crypt_create_from_file(FILE *fp, char_u *key) |
| 6122 | 293 { |
| 294 int method_nr; | |
| 295 int header_len; | |
| 296 char magic_buffer[CRYPT_MAGIC_LEN]; | |
| 297 char_u *buffer; | |
| 298 cryptstate_T *state; | |
| 299 | |
| 300 if (fread(magic_buffer, CRYPT_MAGIC_LEN, 1, fp) != 1) | |
| 301 return NULL; | |
| 302 method_nr = crypt_method_nr_from_magic(magic_buffer, CRYPT_MAGIC_LEN); | |
| 303 if (method_nr < 0) | |
| 304 return NULL; | |
| 305 | |
| 306 header_len = crypt_get_header_len(method_nr); | |
| 307 if ((buffer = alloc(header_len)) == NULL) | |
| 308 return NULL; | |
| 309 mch_memmove(buffer, magic_buffer, CRYPT_MAGIC_LEN); | |
| 310 if (header_len > CRYPT_MAGIC_LEN | |
| 311 && fread(buffer + CRYPT_MAGIC_LEN, | |
| 312 header_len - CRYPT_MAGIC_LEN, 1, fp) != 1) | |
| 313 { | |
| 314 vim_free(buffer); | |
| 315 return NULL; | |
| 316 } | |
| 317 | |
| 318 state = crypt_create_from_header(method_nr, key, buffer); | |
| 319 vim_free(buffer); | |
| 320 return state; | |
| 321 } | |
| 322 | |
| 323 /* | |
| 324 * Allocate a cryptstate_T for writing and initialize it with "key". | |
| 325 * Allocates and fills in the header and stores it in "header", setting | |
| 326 * "header_len". The header may include salt and seed, depending on | |
| 327 * cryptmethod. Caller must free header. | |
| 328 * Returns the state or NULL on failure. | |
| 329 */ | |
| 330 cryptstate_T * | |
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331 crypt_create_for_writing( |
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332 int method_nr, |
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333 char_u *key, |
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334 char_u **header, |
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335 int *header_len) |
| 6122 | 336 { |
| 337 int len = crypt_get_header_len(method_nr); | |
| 338 char_u *salt = NULL; | |
| 339 char_u *seed = NULL; | |
| 340 int salt_len = cryptmethods[method_nr].salt_len; | |
| 341 int seed_len = cryptmethods[method_nr].seed_len; | |
| 342 cryptstate_T *state; | |
| 343 | |
| 344 *header_len = len; | |
| 345 *header = alloc(len); | |
| 346 if (*header == NULL) | |
| 347 return NULL; | |
| 348 | |
| 349 mch_memmove(*header, cryptmethods[method_nr].magic, CRYPT_MAGIC_LEN); | |
| 350 if (salt_len > 0 || seed_len > 0) | |
| 351 { | |
| 352 if (salt_len > 0) | |
| 353 salt = *header + CRYPT_MAGIC_LEN; | |
| 354 if (seed_len > 0) | |
| 355 seed = *header + CRYPT_MAGIC_LEN + salt_len; | |
| 356 | |
| 357 /* TODO: Should this be crypt method specific? (Probably not worth | |
| 358 * it). sha2_seed is pretty bad for large amounts of entropy, so make | |
| 359 * that into something which is suitable for anything. */ | |
| 360 sha2_seed(salt, salt_len, seed, seed_len); | |
| 361 } | |
| 362 | |
| 363 state = crypt_create(method_nr, key, salt, salt_len, seed, seed_len); | |
| 364 if (state == NULL) | |
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365 VIM_CLEAR(*header); |
| 6122 | 366 return state; |
| 367 } | |
| 368 | |
| 369 /* | |
| 370 * Free the crypt state. | |
| 371 */ | |
| 372 void | |
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373 crypt_free_state(cryptstate_T *state) |
| 6122 | 374 { |
| 375 vim_free(state->method_state); | |
| 376 vim_free(state); | |
| 377 } | |
| 378 | |
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379 #ifdef CRYPT_NOT_INPLACE |
| 6122 | 380 /* |
| 381 * Encode "from[len]" and store the result in a newly allocated buffer, which | |
| 382 * is stored in "newptr". | |
| 383 * Return number of bytes in "newptr", 0 for need more or -1 on error. | |
| 384 */ | |
| 385 long | |
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386 crypt_encode_alloc( |
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387 cryptstate_T *state, |
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388 char_u *from, |
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389 size_t len, |
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390 char_u **newptr) |
| 6122 | 391 { |
| 392 cryptmethod_T *method = &cryptmethods[state->method_nr]; | |
| 393 | |
| 394 if (method->encode_buffer_fn != NULL) | |
| 395 /* Has buffer function, pass through. */ | |
| 396 return method->encode_buffer_fn(state, from, len, newptr); | |
| 397 if (len == 0) | |
| 398 /* Not buffering, just return EOF. */ | |
| 6132 | 399 return (long)len; |
| 6122 | 400 |
| 6132 | 401 *newptr = alloc((long)len); |
| 6122 | 402 if (*newptr == NULL) |
| 403 return -1; | |
| 404 method->encode_fn(state, from, len, *newptr); | |
| 6132 | 405 return (long)len; |
| 6122 | 406 } |
| 407 | |
| 408 /* | |
| 409 * Decrypt "ptr[len]" and store the result in a newly allocated buffer, which | |
| 410 * is stored in "newptr". | |
| 411 * Return number of bytes in "newptr", 0 for need more or -1 on error. | |
| 412 */ | |
| 413 long | |
|
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414 crypt_decode_alloc( |
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415 cryptstate_T *state, |
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416 char_u *ptr, |
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417 long len, |
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418 char_u **newptr) |
| 6122 | 419 { |
| 420 cryptmethod_T *method = &cryptmethods[state->method_nr]; | |
| 421 | |
| 422 if (method->decode_buffer_fn != NULL) | |
| 423 /* Has buffer function, pass through. */ | |
| 424 return method->decode_buffer_fn(state, ptr, len, newptr); | |
| 425 | |
| 426 if (len == 0) | |
| 427 /* Not buffering, just return EOF. */ | |
| 428 return len; | |
| 429 | |
| 430 *newptr = alloc(len); | |
| 431 if (*newptr == NULL) | |
| 432 return -1; | |
| 433 method->decode_fn(state, ptr, len, *newptr); | |
| 434 return len; | |
| 435 } | |
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436 #endif |
| 6122 | 437 |
| 438 /* | |
| 439 * Encrypting "from[len]" into "to[len]". | |
| 440 */ | |
| 441 void | |
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442 crypt_encode( |
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443 cryptstate_T *state, |
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444 char_u *from, |
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445 size_t len, |
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446 char_u *to) |
| 6122 | 447 { |
| 448 cryptmethods[state->method_nr].encode_fn(state, from, len, to); | |
| 449 } | |
| 450 | |
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451 #if 0 // unused |
| 6122 | 452 /* |
| 453 * decrypting "from[len]" into "to[len]". | |
| 454 */ | |
| 455 void | |
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456 crypt_decode( |
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457 cryptstate_T *state, |
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458 char_u *from, |
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459 size_t len, |
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460 char_u *to) |
| 6122 | 461 { |
| 462 cryptmethods[state->method_nr].decode_fn(state, from, len, to); | |
| 463 } | |
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464 #endif |
| 6122 | 465 |
| 466 /* | |
| 467 * Simple inplace encryption, modifies "buf[len]" in place. | |
| 468 */ | |
| 469 void | |
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470 crypt_encode_inplace( |
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471 cryptstate_T *state, |
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472 char_u *buf, |
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473 size_t len) |
| 6122 | 474 { |
| 475 cryptmethods[state->method_nr].encode_inplace_fn(state, buf, len, buf); | |
| 476 } | |
| 477 | |
| 478 /* | |
| 479 * Simple inplace decryption, modifies "buf[len]" in place. | |
| 480 */ | |
| 481 void | |
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482 crypt_decode_inplace( |
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483 cryptstate_T *state, |
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484 char_u *buf, |
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485 size_t len) |
| 6122 | 486 { |
| 487 cryptmethods[state->method_nr].decode_inplace_fn(state, buf, len, buf); | |
| 488 } | |
| 489 | |
| 490 /* | |
| 491 * Free an allocated crypt key. Clear the text to make sure it doesn't stay | |
| 492 * in memory anywhere. | |
| 493 */ | |
| 494 void | |
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495 crypt_free_key(char_u *key) |
| 6122 | 496 { |
| 497 char_u *p; | |
| 498 | |
| 499 if (key != NULL) | |
| 500 { | |
| 501 for (p = key; *p != NUL; ++p) | |
| 502 *p = 0; | |
| 503 vim_free(key); | |
| 504 } | |
| 505 } | |
| 506 | |
| 507 /* | |
| 6353 | 508 * Check the crypt method and give a warning if it's outdated. |
| 509 */ | |
| 510 void | |
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511 crypt_check_method(int method) |
| 6353 | 512 { |
| 513 if (method < CRYPT_M_BF2) | |
| 514 { | |
| 515 msg_scroll = TRUE; | |
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516 msg(_("Warning: Using a weak encryption method; see :help 'cm'")); |
| 6353 | 517 } |
| 518 } | |
| 519 | |
| 520 void | |
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521 crypt_check_current_method(void) |
| 6353 | 522 { |
| 523 crypt_check_method(crypt_get_method_nr(curbuf)); | |
| 524 } | |
| 525 | |
| 526 /* | |
| 6122 | 527 * Ask the user for a crypt key. |
| 528 * When "store" is TRUE, the new key is stored in the 'key' option, and the | |
| 529 * 'key' option value is returned: Don't free it. | |
| 530 * When "store" is FALSE, the typed key is returned in allocated memory. | |
| 531 * Returns NULL on failure. | |
| 532 */ | |
| 533 char_u * | |
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534 crypt_get_key( |
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535 int store, |
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536 int twice) /* Ask for the key twice. */ |
| 6122 | 537 { |
| 538 char_u *p1, *p2 = NULL; | |
| 539 int round; | |
| 540 | |
| 541 for (round = 0; ; ++round) | |
| 542 { | |
| 543 cmdline_star = TRUE; | |
| 544 cmdline_row = msg_row; | |
| 545 p1 = getcmdline_prompt(NUL, round == 0 | |
| 546 ? (char_u *)_("Enter encryption key: ") | |
| 547 : (char_u *)_("Enter same key again: "), 0, EXPAND_NOTHING, | |
| 548 NULL); | |
| 549 cmdline_star = FALSE; | |
| 550 | |
| 551 if (p1 == NULL) | |
| 552 break; | |
| 553 | |
| 554 if (round == twice) | |
| 555 { | |
| 556 if (p2 != NULL && STRCMP(p1, p2) != 0) | |
| 557 { | |
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558 msg(_("Keys don't match!")); |
| 6122 | 559 crypt_free_key(p1); |
| 560 crypt_free_key(p2); | |
| 561 p2 = NULL; | |
| 562 round = -1; /* do it again */ | |
| 563 continue; | |
| 564 } | |
| 565 | |
| 566 if (store) | |
| 567 { | |
| 568 set_option_value((char_u *)"key", 0L, p1, OPT_LOCAL); | |
| 569 crypt_free_key(p1); | |
| 570 p1 = curbuf->b_p_key; | |
| 571 } | |
| 572 break; | |
| 573 } | |
| 574 p2 = p1; | |
| 575 } | |
| 576 | |
| 577 /* since the user typed this, no need to wait for return */ | |
| 578 if (msg_didout) | |
| 579 msg_putchar('\n'); | |
| 580 need_wait_return = FALSE; | |
| 581 msg_didout = FALSE; | |
| 582 | |
| 583 crypt_free_key(p2); | |
| 584 return p1; | |
| 585 } | |
| 586 | |
| 587 | |
| 588 /* | |
| 589 * Append a message to IObuff for the encryption/decryption method being used. | |
| 590 */ | |
| 591 void | |
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592 crypt_append_msg( |
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593 buf_T *buf) |
| 6122 | 594 { |
| 595 if (crypt_get_method_nr(buf) == 0) | |
| 596 STRCAT(IObuff, _("[crypted]")); | |
| 597 else | |
| 598 { | |
| 599 STRCAT(IObuff, "["); | |
| 600 STRCAT(IObuff, *buf->b_p_cm == NUL ? p_cm : buf->b_p_cm); | |
| 601 STRCAT(IObuff, "]"); | |
| 602 } | |
| 603 } | |
| 604 | |
| 605 #endif /* FEAT_CRYPT */ |