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| 1 /* bio_asn1.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 /* Experimental ASN1 BIO. When written through the data is converted | |
| 60 * to an ASN1 string type: default is OCTET STRING. Additional functions | |
| 61 * can be provided to add prefix and suffix data. | |
| 62 */ | |
| 63 | |
| 64 #include <string.h> | |
| 65 #include <openssl/bio.h> | |
| 66 #include <openssl/asn1.h> | |
| 67 | |
| 68 /* Must be large enough for biggest tag+length */ | |
| 69 #define DEFAULT_ASN1_BUF_SIZE 20 | |
| 70 | |
| 71 typedef enum | |
| 72 { | |
| 73 ASN1_STATE_START, | |
| 74 ASN1_STATE_PRE_COPY, | |
| 75 ASN1_STATE_HEADER, | |
| 76 ASN1_STATE_HEADER_COPY, | |
| 77 ASN1_STATE_DATA_COPY, | |
| 78 ASN1_STATE_POST_COPY, | |
| 79 ASN1_STATE_DONE | |
| 80 } asn1_bio_state_t; | |
| 81 | |
| 82 typedef struct BIO_ASN1_EX_FUNCS_st | |
| 83 { | |
| 84 asn1_ps_func *ex_func; | |
| 85 asn1_ps_func *ex_free_func; | |
| 86 } BIO_ASN1_EX_FUNCS; | |
| 87 | |
| 88 typedef struct BIO_ASN1_BUF_CTX_t | |
| 89 { | |
| 90 /* Internal state */ | |
| 91 asn1_bio_state_t state; | |
| 92 /* Internal buffer */ | |
| 93 unsigned char *buf; | |
| 94 /* Size of buffer */ | |
| 95 int bufsize; | |
| 96 /* Current position in buffer */ | |
| 97 int bufpos; | |
| 98 /* Current buffer length */ | |
| 99 int buflen; | |
| 100 /* Amount of data to copy */ | |
| 101 int copylen; | |
| 102 /* Class and tag to use */ | |
| 103 int asn1_class, asn1_tag; | |
| 104 asn1_ps_func *prefix, *prefix_free, *suffix, *suffix_free; | |
| 105 /* Extra buffer for prefix and suffix data */ | |
| 106 unsigned char *ex_buf; | |
| 107 int ex_len; | |
| 108 int ex_pos; | |
| 109 void *ex_arg; | |
| 110 } BIO_ASN1_BUF_CTX; | |
| 111 | |
| 112 | |
| 113 static int asn1_bio_write(BIO *h, const char *buf,int num); | |
| 114 static int asn1_bio_read(BIO *h, char *buf, int size); | |
| 115 static int asn1_bio_puts(BIO *h, const char *str); | |
| 116 static int asn1_bio_gets(BIO *h, char *str, int size); | |
| 117 static long asn1_bio_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
| 118 static int asn1_bio_new(BIO *h); | |
| 119 static int asn1_bio_free(BIO *data); | |
| 120 static long asn1_bio_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); | |
| 121 | |
| 122 static int asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size); | |
| 123 static int asn1_bio_flush_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, | |
| 124 asn1_ps_func *cleanup, asn1_bio_state_t next); | |
| 125 static int asn1_bio_setup_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, | |
| 126 asn1_ps_func *setup, | |
| 127 asn1_bio_state_t ex_state, | |
| 128 asn1_bio_state_t other_state); | |
| 129 | |
| 130 static BIO_METHOD methods_asn1= | |
| 131 { | |
| 132 BIO_TYPE_ASN1, | |
| 133 "asn1", | |
| 134 asn1_bio_write, | |
| 135 asn1_bio_read, | |
| 136 asn1_bio_puts, | |
| 137 asn1_bio_gets, | |
| 138 asn1_bio_ctrl, | |
| 139 asn1_bio_new, | |
| 140 asn1_bio_free, | |
| 141 asn1_bio_callback_ctrl, | |
| 142 }; | |
| 143 | |
| 144 BIO_METHOD *BIO_f_asn1(void) | |
| 145 { | |
| 146 return(&methods_asn1); | |
| 147 } | |
| 148 | |
| 149 | |
| 150 static int asn1_bio_new(BIO *b) | |
| 151 { | |
| 152 BIO_ASN1_BUF_CTX *ctx; | |
| 153 ctx = OPENSSL_malloc(sizeof(BIO_ASN1_BUF_CTX)); | |
| 154 if (!ctx) | |
| 155 return 0; | |
| 156 if (!asn1_bio_init(ctx, DEFAULT_ASN1_BUF_SIZE)) | |
| 157 return 0; | |
| 158 b->init = 1; | |
| 159 b->ptr = (char *)ctx; | |
| 160 b->flags = 0; | |
| 161 return 1; | |
| 162 } | |
| 163 | |
| 164 static int asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size) | |
| 165 { | |
| 166 ctx->buf = OPENSSL_malloc(size); | |
| 167 if (!ctx->buf) | |
| 168 return 0; | |
| 169 ctx->bufsize = size; | |
| 170 ctx->bufpos = 0; | |
| 171 ctx->buflen = 0; | |
| 172 ctx->copylen = 0; | |
| 173 ctx->asn1_class = V_ASN1_UNIVERSAL; | |
| 174 ctx->asn1_tag = V_ASN1_OCTET_STRING; | |
| 175 ctx->ex_buf = 0; | |
| 176 ctx->ex_pos = 0; | |
| 177 ctx->ex_len = 0; | |
| 178 ctx->state = ASN1_STATE_START; | |
| 179 return 1; | |
| 180 } | |
| 181 | |
| 182 static int asn1_bio_free(BIO *b) | |
| 183 { | |
| 184 BIO_ASN1_BUF_CTX *ctx; | |
| 185 ctx = (BIO_ASN1_BUF_CTX *) b->ptr; | |
| 186 if (ctx == NULL) | |
| 187 return 0; | |
| 188 if (ctx->buf) | |
| 189 OPENSSL_free(ctx->buf); | |
| 190 OPENSSL_free(ctx); | |
| 191 b->init = 0; | |
| 192 b->ptr = NULL; | |
| 193 b->flags = 0; | |
| 194 return 1; | |
| 195 } | |
| 196 | |
| 197 static int asn1_bio_write(BIO *b, const char *in , int inl) | |
| 198 { | |
| 199 BIO_ASN1_BUF_CTX *ctx; | |
| 200 int wrmax, wrlen, ret; | |
| 201 unsigned char *p; | |
| 202 if (!in || (inl < 0) || (b->next_bio == NULL)) | |
| 203 return 0; | |
| 204 ctx = (BIO_ASN1_BUF_CTX *) b->ptr; | |
| 205 if (ctx == NULL) | |
| 206 return 0; | |
| 207 | |
| 208 wrlen = 0; | |
| 209 ret = -1; | |
| 210 | |
| 211 for(;;) | |
| 212 { | |
| 213 switch (ctx->state) | |
| 214 { | |
| 215 | |
| 216 /* Setup prefix data, call it */ | |
| 217 case ASN1_STATE_START: | |
| 218 if (!asn1_bio_setup_ex(b, ctx, ctx->prefix, | |
| 219 ASN1_STATE_PRE_COPY, ASN1_STATE_HEADER)) | |
| 220 return 0; | |
| 221 break; | |
| 222 | |
| 223 /* Copy any pre data first */ | |
| 224 case ASN1_STATE_PRE_COPY: | |
| 225 | |
| 226 ret = asn1_bio_flush_ex(b, ctx, ctx->prefix_free, | |
| 227 ASN1_STATE_HEADER); | |
| 228 | |
| 229 if (ret <= 0) | |
| 230 goto done; | |
| 231 | |
| 232 break; | |
| 233 | |
| 234 case ASN1_STATE_HEADER: | |
| 235 ctx->buflen = | |
| 236 ASN1_object_size(0, inl, ctx->asn1_tag) - inl; | |
| 237 OPENSSL_assert(ctx->buflen <= ctx->bufsize); | |
| 238 p = ctx->buf; | |
| 239 ASN1_put_object(&p, 0, inl, | |
| 240 ctx->asn1_tag, ctx->asn1_class); | |
| 241 ctx->copylen = inl; | |
| 242 ctx->state = ASN1_STATE_HEADER_COPY; | |
| 243 | |
| 244 break; | |
| 245 | |
| 246 case ASN1_STATE_HEADER_COPY: | |
| 247 ret = BIO_write(b->next_bio, | |
| 248 ctx->buf + ctx->bufpos, ctx->buflen); | |
| 249 if (ret <= 0) | |
| 250 goto done; | |
| 251 | |
| 252 ctx->buflen -= ret; | |
| 253 if (ctx->buflen) | |
| 254 ctx->bufpos += ret; | |
| 255 else | |
| 256 { | |
| 257 ctx->bufpos = 0; | |
| 258 ctx->state = ASN1_STATE_DATA_COPY; | |
| 259 } | |
| 260 | |
| 261 break; | |
| 262 | |
| 263 case ASN1_STATE_DATA_COPY: | |
| 264 | |
| 265 if (inl > ctx->copylen) | |
| 266 wrmax = ctx->copylen; | |
| 267 else | |
| 268 wrmax = inl; | |
| 269 ret = BIO_write(b->next_bio, in, wrmax); | |
| 270 if (ret <= 0) | |
| 271 break; | |
| 272 wrlen += ret; | |
| 273 ctx->copylen -= ret; | |
| 274 in += ret; | |
| 275 inl -= ret; | |
| 276 | |
| 277 if (ctx->copylen == 0) | |
| 278 ctx->state = ASN1_STATE_HEADER; | |
| 279 | |
| 280 if (inl == 0) | |
| 281 goto done; | |
| 282 | |
| 283 break; | |
| 284 | |
| 285 default: | |
| 286 BIO_clear_retry_flags(b); | |
| 287 return 0; | |
| 288 | |
| 289 } | |
| 290 | |
| 291 } | |
| 292 | |
| 293 done: | |
| 294 BIO_clear_retry_flags(b); | |
| 295 BIO_copy_next_retry(b); | |
| 296 | |
| 297 return (wrlen > 0) ? wrlen : ret; | |
| 298 | |
| 299 } | |
| 300 | |
| 301 static int asn1_bio_flush_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, | |
| 302 asn1_ps_func *cleanup, asn1_bio_state_t next) | |
| 303 { | |
| 304 int ret; | |
| 305 if (ctx->ex_len <= 0) | |
| 306 return 1; | |
| 307 for(;;) | |
| 308 { | |
| 309 ret = BIO_write(b->next_bio, ctx->ex_buf + ctx->ex_pos, | |
| 310 ctx->ex_len); | |
| 311 if (ret <= 0) | |
| 312 break; | |
| 313 ctx->ex_len -= ret; | |
| 314 if (ctx->ex_len > 0) | |
| 315 ctx->ex_pos += ret; | |
| 316 else | |
| 317 { | |
| 318 if(cleanup) | |
| 319 cleanup(b, &ctx->ex_buf, &ctx->ex_len, | |
| 320 &ctx->ex_arg); | |
| 321 ctx->state = next; | |
| 322 ctx->ex_pos = 0; | |
| 323 break; | |
| 324 } | |
| 325 } | |
| 326 return ret; | |
| 327 } | |
| 328 | |
| 329 static int asn1_bio_setup_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, | |
| 330 asn1_ps_func *setup, | |
| 331 asn1_bio_state_t ex_state, | |
| 332 asn1_bio_state_t other_state) | |
| 333 { | |
| 334 if (setup && !setup(b, &ctx->ex_buf, &ctx->ex_len, &ctx->ex_arg)) | |
| 335 { | |
| 336 BIO_clear_retry_flags(b); | |
| 337 return 0; | |
| 338 } | |
| 339 if (ctx->ex_len > 0) | |
| 340 ctx->state = ex_state; | |
| 341 else | |
| 342 ctx->state = other_state; | |
| 343 return 1; | |
| 344 } | |
| 345 | |
| 346 static int asn1_bio_read(BIO *b, char *in , int inl) | |
| 347 { | |
| 348 if (!b->next_bio) | |
| 349 return 0; | |
| 350 return BIO_read(b->next_bio, in , inl); | |
| 351 } | |
| 352 | |
| 353 static int asn1_bio_puts(BIO *b, const char *str) | |
| 354 { | |
| 355 return asn1_bio_write(b, str, strlen(str)); | |
| 356 } | |
| 357 | |
| 358 static int asn1_bio_gets(BIO *b, char *str, int size) | |
| 359 { | |
| 360 if (!b->next_bio) | |
| 361 return 0; | |
| 362 return BIO_gets(b->next_bio, str , size); | |
| 363 } | |
| 364 | |
| 365 static long asn1_bio_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) | |
| 366 { | |
| 367 if (b->next_bio == NULL) return(0); | |
| 368 return BIO_callback_ctrl(b->next_bio,cmd,fp); | |
| 369 } | |
| 370 | |
| 371 static long asn1_bio_ctrl(BIO *b, int cmd, long arg1, void *arg2) | |
| 372 { | |
| 373 BIO_ASN1_BUF_CTX *ctx; | |
| 374 BIO_ASN1_EX_FUNCS *ex_func; | |
| 375 long ret = 1; | |
| 376 ctx = (BIO_ASN1_BUF_CTX *) b->ptr; | |
| 377 if (ctx == NULL) | |
| 378 return 0; | |
| 379 switch(cmd) | |
| 380 { | |
| 381 | |
| 382 case BIO_C_SET_PREFIX: | |
| 383 ex_func = arg2; | |
| 384 ctx->prefix = ex_func->ex_func; | |
| 385 ctx->prefix_free = ex_func->ex_free_func; | |
| 386 break; | |
| 387 | |
| 388 case BIO_C_GET_PREFIX: | |
| 389 ex_func = arg2; | |
| 390 ex_func->ex_func = ctx->prefix; | |
| 391 ex_func->ex_free_func = ctx->prefix_free; | |
| 392 break; | |
| 393 | |
| 394 case BIO_C_SET_SUFFIX: | |
| 395 ex_func = arg2; | |
| 396 ctx->suffix = ex_func->ex_func; | |
| 397 ctx->suffix_free = ex_func->ex_free_func; | |
| 398 break; | |
| 399 | |
| 400 case BIO_C_GET_SUFFIX: | |
| 401 ex_func = arg2; | |
| 402 ex_func->ex_func = ctx->suffix; | |
| 403 ex_func->ex_free_func = ctx->suffix_free; | |
| 404 break; | |
| 405 | |
| 406 case BIO_C_SET_EX_ARG: | |
| 407 ctx->ex_arg = arg2; | |
| 408 break; | |
| 409 | |
| 410 case BIO_C_GET_EX_ARG: | |
| 411 *(void **)arg2 = ctx->ex_arg; | |
| 412 break; | |
| 413 | |
| 414 case BIO_CTRL_FLUSH: | |
| 415 if (!b->next_bio) | |
| 416 return 0; | |
| 417 | |
| 418 /* Call post function if possible */ | |
| 419 if (ctx->state == ASN1_STATE_HEADER) | |
| 420 { | |
| 421 if (!asn1_bio_setup_ex(b, ctx, ctx->suffix, | |
| 422 ASN1_STATE_POST_COPY, ASN1_STATE_DONE)) | |
| 423 return 0; | |
| 424 } | |
| 425 | |
| 426 if (ctx->state == ASN1_STATE_POST_COPY) | |
| 427 { | |
| 428 ret = asn1_bio_flush_ex(b, ctx, ctx->suffix_free, | |
| 429 ASN1_STATE_DONE); | |
| 430 if (ret <= 0) | |
| 431 return ret; | |
| 432 } | |
| 433 | |
| 434 if (ctx->state == ASN1_STATE_DONE) | |
| 435 return BIO_ctrl(b->next_bio, cmd, arg1, arg2); | |
| 436 else | |
| 437 { | |
| 438 BIO_clear_retry_flags(b); | |
| 439 return 0; | |
| 440 } | |
| 441 break; | |
| 442 | |
| 443 | |
| 444 default: | |
| 445 if (!b->next_bio) | |
| 446 return 0; | |
| 447 return BIO_ctrl(b->next_bio, cmd, arg1, arg2); | |
| 448 | |
| 449 } | |
| 450 | |
| 451 return ret; | |
| 452 } | |
| 453 | |
| 454 static int asn1_bio_set_ex(BIO *b, int cmd, | |
| 455 asn1_ps_func *ex_func, asn1_ps_func *ex_free_func) | |
| 456 { | |
| 457 BIO_ASN1_EX_FUNCS extmp; | |
| 458 extmp.ex_func = ex_func; | |
| 459 extmp.ex_free_func = ex_free_func; | |
| 460 return BIO_ctrl(b, cmd, 0, &extmp); | |
| 461 } | |
| 462 | |
| 463 static int asn1_bio_get_ex(BIO *b, int cmd, | |
| 464 asn1_ps_func **ex_func, asn1_ps_func **ex_free_func) | |
| 465 { | |
| 466 BIO_ASN1_EX_FUNCS extmp; | |
| 467 int ret; | |
| 468 ret = BIO_ctrl(b, cmd, 0, &extmp); | |
| 469 if (ret > 0) | |
| 470 { | |
| 471 *ex_func = extmp.ex_func; | |
| 472 *ex_free_func = extmp.ex_free_func; | |
| 473 } | |
| 474 return ret; | |
| 475 } | |
| 476 | |
| 477 int BIO_asn1_set_prefix(BIO *b, asn1_ps_func *prefix, asn1_ps_func *prefix_free) | |
| 478 { | |
| 479 return asn1_bio_set_ex(b, BIO_C_SET_PREFIX, prefix, prefix_free); | |
| 480 } | |
| 481 | |
| 482 int BIO_asn1_get_prefix(BIO *b, asn1_ps_func **pprefix, asn1_ps_func **pprefix_f
ree) | |
| 483 { | |
| 484 return asn1_bio_get_ex(b, BIO_C_GET_PREFIX, pprefix, pprefix_free); | |
| 485 } | |
| 486 | |
| 487 int BIO_asn1_set_suffix(BIO *b, asn1_ps_func *suffix, asn1_ps_func *suffix_free) | |
| 488 { | |
| 489 return asn1_bio_set_ex(b, BIO_C_SET_SUFFIX, suffix, suffix_free); | |
| 490 } | |
| 491 | |
| 492 int BIO_asn1_get_suffix(BIO *b, asn1_ps_func **psuffix, asn1_ps_func **psuffix_f
ree) | |
| 493 { | |
| 494 return asn1_bio_get_ex(b, BIO_C_GET_SUFFIX, psuffix, psuffix_free); | |
| 495 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master