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| 1 /* crypto/evp/bio_ber.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include <errno.h> | |
| 61 #include "cryptlib.h" | |
| 62 #include <openssl/buffer.h> | |
| 63 #include <openssl/evp.h> | |
| 64 | |
| 65 static int ber_write(BIO *h,char *buf,int num); | |
| 66 static int ber_read(BIO *h,char *buf,int size); | |
| 67 /*static int ber_puts(BIO *h,char *str); */ | |
| 68 /*static int ber_gets(BIO *h,char *str,int size); */ | |
| 69 static long ber_ctrl(BIO *h,int cmd,long arg1,char *arg2); | |
| 70 static int ber_new(BIO *h); | |
| 71 static int ber_free(BIO *data); | |
| 72 static long ber_callback_ctrl(BIO *h,int cmd,void *(*fp)()); | |
| 73 #define BER_BUF_SIZE (32) | |
| 74 | |
| 75 /* This is used to hold the state of the BER objects being read. */ | |
| 76 typedef struct ber_struct | |
| 77 { | |
| 78 int tag; | |
| 79 int class; | |
| 80 long length; | |
| 81 int inf; | |
| 82 int num_left; | |
| 83 int depth; | |
| 84 } BER_CTX; | |
| 85 | |
| 86 typedef struct bio_ber_struct | |
| 87 { | |
| 88 int tag; | |
| 89 int class; | |
| 90 long length; | |
| 91 int inf; | |
| 92 | |
| 93 /* most of the following are used when doing non-blocking IO */ | |
| 94 /* reading */ | |
| 95 long num_left; /* number of bytes still to read/write in block */ | |
| 96 int depth; /* used with indefinite encoding. */ | |
| 97 int finished; /* No more read data */ | |
| 98 | |
| 99 /* writting */ | |
| 100 char *w_addr; | |
| 101 int w_offset; | |
| 102 int w_left; | |
| 103 | |
| 104 int buf_len; | |
| 105 int buf_off; | |
| 106 unsigned char buf[BER_BUF_SIZE]; | |
| 107 } BIO_BER_CTX; | |
| 108 | |
| 109 static BIO_METHOD methods_ber= | |
| 110 { | |
| 111 BIO_TYPE_CIPHER,"cipher", | |
| 112 ber_write, | |
| 113 ber_read, | |
| 114 NULL, /* ber_puts, */ | |
| 115 NULL, /* ber_gets, */ | |
| 116 ber_ctrl, | |
| 117 ber_new, | |
| 118 ber_free, | |
| 119 ber_callback_ctrl, | |
| 120 }; | |
| 121 | |
| 122 BIO_METHOD *BIO_f_ber(void) | |
| 123 { | |
| 124 return(&methods_ber); | |
| 125 } | |
| 126 | |
| 127 static int ber_new(BIO *bi) | |
| 128 { | |
| 129 BIO_BER_CTX *ctx; | |
| 130 | |
| 131 ctx=(BIO_BER_CTX *)OPENSSL_malloc(sizeof(BIO_BER_CTX)); | |
| 132 if (ctx == NULL) return(0); | |
| 133 | |
| 134 memset((char *)ctx,0,sizeof(BIO_BER_CTX)); | |
| 135 | |
| 136 bi->init=0; | |
| 137 bi->ptr=(char *)ctx; | |
| 138 bi->flags=0; | |
| 139 return(1); | |
| 140 } | |
| 141 | |
| 142 static int ber_free(BIO *a) | |
| 143 { | |
| 144 BIO_BER_CTX *b; | |
| 145 | |
| 146 if (a == NULL) return(0); | |
| 147 b=(BIO_BER_CTX *)a->ptr; | |
| 148 OPENSSL_cleanse(a->ptr,sizeof(BIO_BER_CTX)); | |
| 149 OPENSSL_free(a->ptr); | |
| 150 a->ptr=NULL; | |
| 151 a->init=0; | |
| 152 a->flags=0; | |
| 153 return(1); | |
| 154 } | |
| 155 | |
| 156 int bio_ber_get_header(BIO *bio, BIO_BER_CTX *ctx) | |
| 157 { | |
| 158 char buf[64]; | |
| 159 int i,j,n; | |
| 160 int ret; | |
| 161 unsigned char *p; | |
| 162 unsigned long length | |
| 163 int tag; | |
| 164 int class; | |
| 165 long max; | |
| 166 | |
| 167 BIO_clear_retry_flags(b); | |
| 168 | |
| 169 /* Pack the buffer down if there is a hole at the front */ | |
| 170 if (ctx->buf_off != 0) | |
| 171 { | |
| 172 p=ctx->buf; | |
| 173 j=ctx->buf_off; | |
| 174 n=ctx->buf_len-j; | |
| 175 for (i=0; i<n; i++) | |
| 176 { | |
| 177 p[0]=p[j]; | |
| 178 p++; | |
| 179 } | |
| 180 ctx->buf_len-j; | |
| 181 ctx->buf_off=0; | |
| 182 } | |
| 183 | |
| 184 /* If there is more room, read some more data */ | |
| 185 i=BER_BUF_SIZE-ctx->buf_len; | |
| 186 if (i) | |
| 187 { | |
| 188 i=BIO_read(bio->next_bio,&(ctx->buf[ctx->buf_len]),i); | |
| 189 if (i <= 0) | |
| 190 { | |
| 191 BIO_copy_next_retry(b); | |
| 192 return(i); | |
| 193 } | |
| 194 else | |
| 195 ctx->buf_len+=i; | |
| 196 } | |
| 197 | |
| 198 max=ctx->buf_len; | |
| 199 p=ctx->buf; | |
| 200 ret=ASN1_get_object(&p,&length,&tag,&class,max); | |
| 201 | |
| 202 if (ret & 0x80) | |
| 203 { | |
| 204 if ((ctx->buf_len < BER_BUF_SIZE) && | |
| 205 (ERR_GET_REASON(ERR_peek_error()) == ASN1_R_TOO_LONG)) | |
| 206 { | |
| 207 ERR_clear_error(); /* clear the error */ | |
| 208 BIO_set_retry_read(b); | |
| 209 } | |
| 210 return(-1); | |
| 211 } | |
| 212 | |
| 213 /* We have no error, we have a header, so make use of it */ | |
| 214 | |
| 215 if ((ctx->tag >= 0) && (ctx->tag != tag)) | |
| 216 { | |
| 217 BIOerr(BIO_F_BIO_BER_GET_HEADER,BIO_R_TAG_MISMATCH); | |
| 218 sprintf(buf,"tag=%d, got %d",ctx->tag,tag); | |
| 219 ERR_add_error_data(1,buf); | |
| 220 return(-1); | |
| 221 } | |
| 222 if (ret & 0x01) | |
| 223 if (ret & V_ASN1_CONSTRUCTED) | |
| 224 } | |
| 225 | |
| 226 static int ber_read(BIO *b, char *out, int outl) | |
| 227 { | |
| 228 int ret=0,i,n; | |
| 229 BIO_BER_CTX *ctx; | |
| 230 | |
| 231 BIO_clear_retry_flags(b); | |
| 232 | |
| 233 if (out == NULL) return(0); | |
| 234 ctx=(BIO_BER_CTX *)b->ptr; | |
| 235 | |
| 236 if ((ctx == NULL) || (b->next_bio == NULL)) return(0); | |
| 237 | |
| 238 if (ctx->finished) return(0); | |
| 239 | |
| 240 again: | |
| 241 /* First see if we are half way through reading a block */ | |
| 242 if (ctx->num_left > 0) | |
| 243 { | |
| 244 if (ctx->num_left < outl) | |
| 245 n=ctx->num_left; | |
| 246 else | |
| 247 n=outl; | |
| 248 i=BIO_read(b->next_bio,out,n); | |
| 249 if (i <= 0) | |
| 250 { | |
| 251 BIO_copy_next_retry(b); | |
| 252 return(i); | |
| 253 } | |
| 254 ctx->num_left-=i; | |
| 255 outl-=i; | |
| 256 ret+=i; | |
| 257 if (ctx->num_left <= 0) | |
| 258 { | |
| 259 ctx->depth--; | |
| 260 if (ctx->depth <= 0) | |
| 261 ctx->finished=1; | |
| 262 } | |
| 263 if (outl <= 0) | |
| 264 return(ret); | |
| 265 else | |
| 266 goto again; | |
| 267 } | |
| 268 else /* we need to read another BER header */ | |
| 269 { | |
| 270 } | |
| 271 } | |
| 272 | |
| 273 static int ber_write(BIO *b, char *in, int inl) | |
| 274 { | |
| 275 int ret=0,n,i; | |
| 276 BIO_ENC_CTX *ctx; | |
| 277 | |
| 278 ctx=(BIO_ENC_CTX *)b->ptr; | |
| 279 ret=inl; | |
| 280 | |
| 281 BIO_clear_retry_flags(b); | |
| 282 n=ctx->buf_len-ctx->buf_off; | |
| 283 while (n > 0) | |
| 284 { | |
| 285 i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n); | |
| 286 if (i <= 0) | |
| 287 { | |
| 288 BIO_copy_next_retry(b); | |
| 289 return(i); | |
| 290 } | |
| 291 ctx->buf_off+=i; | |
| 292 n-=i; | |
| 293 } | |
| 294 /* at this point all pending data has been written */ | |
| 295 | |
| 296 if ((in == NULL) || (inl <= 0)) return(0); | |
| 297 | |
| 298 ctx->buf_off=0; | |
| 299 while (inl > 0) | |
| 300 { | |
| 301 n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl; | |
| 302 EVP_CipherUpdate(&(ctx->cipher), | |
| 303 (unsigned char *)ctx->buf,&ctx->buf_len, | |
| 304 (unsigned char *)in,n); | |
| 305 inl-=n; | |
| 306 in+=n; | |
| 307 | |
| 308 ctx->buf_off=0; | |
| 309 n=ctx->buf_len; | |
| 310 while (n > 0) | |
| 311 { | |
| 312 i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n); | |
| 313 if (i <= 0) | |
| 314 { | |
| 315 BIO_copy_next_retry(b); | |
| 316 return(i); | |
| 317 } | |
| 318 n-=i; | |
| 319 ctx->buf_off+=i; | |
| 320 } | |
| 321 ctx->buf_len=0; | |
| 322 ctx->buf_off=0; | |
| 323 } | |
| 324 BIO_copy_next_retry(b); | |
| 325 return(ret); | |
| 326 } | |
| 327 | |
| 328 static long ber_ctrl(BIO *b, int cmd, long num, char *ptr) | |
| 329 { | |
| 330 BIO *dbio; | |
| 331 BIO_ENC_CTX *ctx,*dctx; | |
| 332 long ret=1; | |
| 333 int i; | |
| 334 | |
| 335 ctx=(BIO_ENC_CTX *)b->ptr; | |
| 336 | |
| 337 switch (cmd) | |
| 338 { | |
| 339 case BIO_CTRL_RESET: | |
| 340 ctx->ok=1; | |
| 341 ctx->finished=0; | |
| 342 EVP_CipherInit_ex(&(ctx->cipher),NULL,NULL,NULL,NULL, | |
| 343 ctx->cipher.berrypt); | |
| 344 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 345 break; | |
| 346 case BIO_CTRL_EOF: /* More to read */ | |
| 347 if (ctx->cont <= 0) | |
| 348 ret=1; | |
| 349 else | |
| 350 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 351 break; | |
| 352 case BIO_CTRL_WPENDING: | |
| 353 ret=ctx->buf_len-ctx->buf_off; | |
| 354 if (ret <= 0) | |
| 355 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 356 break; | |
| 357 case BIO_CTRL_PENDING: /* More to read in buffer */ | |
| 358 ret=ctx->buf_len-ctx->buf_off; | |
| 359 if (ret <= 0) | |
| 360 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 361 break; | |
| 362 case BIO_CTRL_FLUSH: | |
| 363 /* do a final write */ | |
| 364 again: | |
| 365 while (ctx->buf_len != ctx->buf_off) | |
| 366 { | |
| 367 i=ber_write(b,NULL,0); | |
| 368 if (i < 0) | |
| 369 { | |
| 370 ret=i; | |
| 371 break; | |
| 372 } | |
| 373 } | |
| 374 | |
| 375 if (!ctx->finished) | |
| 376 { | |
| 377 ctx->finished=1; | |
| 378 ctx->buf_off=0; | |
| 379 ret=EVP_CipherFinal_ex(&(ctx->cipher), | |
| 380 (unsigned char *)ctx->buf, | |
| 381 &(ctx->buf_len)); | |
| 382 ctx->ok=(int)ret; | |
| 383 if (ret <= 0) break; | |
| 384 | |
| 385 /* push out the bytes */ | |
| 386 goto again; | |
| 387 } | |
| 388 | |
| 389 /* Finally flush the underlying BIO */ | |
| 390 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 391 break; | |
| 392 case BIO_C_GET_CIPHER_STATUS: | |
| 393 ret=(long)ctx->ok; | |
| 394 break; | |
| 395 case BIO_C_DO_STATE_MACHINE: | |
| 396 BIO_clear_retry_flags(b); | |
| 397 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 398 BIO_copy_next_retry(b); | |
| 399 break; | |
| 400 | |
| 401 case BIO_CTRL_DUP: | |
| 402 dbio=(BIO *)ptr; | |
| 403 dctx=(BIO_ENC_CTX *)dbio->ptr; | |
| 404 memcpy(&(dctx->cipher),&(ctx->cipher),sizeof(ctx->cipher)); | |
| 405 dbio->init=1; | |
| 406 break; | |
| 407 default: | |
| 408 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 409 break; | |
| 410 } | |
| 411 return(ret); | |
| 412 } | |
| 413 | |
| 414 static long ber_callback_ctrl(BIO *b, int cmd, void *(*fp)()) | |
| 415 { | |
| 416 long ret=1; | |
| 417 | |
| 418 if (b->next_bio == NULL) return(0); | |
| 419 switch (cmd) | |
| 420 { | |
| 421 default: | |
| 422 ret=BIO_callback_ctrl(b->next_bio,cmd,fp); | |
| 423 break; | |
| 424 } | |
| 425 return(ret); | |
| 426 } | |
| 427 | |
| 428 /* | |
| 429 void BIO_set_cipher_ctx(b,c) | |
| 430 BIO *b; | |
| 431 EVP_CIPHER_ctx *c; | |
| 432 { | |
| 433 if (b == NULL) return; | |
| 434 | |
| 435 if ((b->callback != NULL) && | |
| 436 (b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0)) | |
| 437 return; | |
| 438 | |
| 439 b->init=1; | |
| 440 ctx=(BIO_ENC_CTX *)b->ptr; | |
| 441 memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX)); | |
| 442 | |
| 443 if (b->callback != NULL) | |
| 444 b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L); | |
| 445 } | |
| 446 */ | |
| 447 | |
| 448 void BIO_set_cipher(BIO *b, EVP_CIPHER *c, unsigned char *k, unsigned char *i, | |
| 449 int e) | |
| 450 { | |
| 451 BIO_ENC_CTX *ctx; | |
| 452 | |
| 453 if (b == NULL) return; | |
| 454 | |
| 455 if ((b->callback != NULL) && | |
| 456 (b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0)) | |
| 457 return; | |
| 458 | |
| 459 b->init=1; | |
| 460 ctx=(BIO_ENC_CTX *)b->ptr; | |
| 461 EVP_CipherInit_ex(&(ctx->cipher),c,NULL,k,i,e); | |
| 462 | |
| 463 if (b->callback != NULL) | |
| 464 b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L); | |
| 465 } | |
| 466 | |
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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