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| 1 /* crypto/bio/bf_buff.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/bio.h> | |
| 63 | |
| 64 static int buffer_write(BIO *h, const char *buf,int num); | |
| 65 static int buffer_read(BIO *h, char *buf, int size); | |
| 66 static int buffer_puts(BIO *h, const char *str); | |
| 67 static int buffer_gets(BIO *h, char *str, int size); | |
| 68 static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
| 69 static int buffer_new(BIO *h); | |
| 70 static int buffer_free(BIO *data); | |
| 71 static long buffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); | |
| 72 #define DEFAULT_BUFFER_SIZE 4096 | |
| 73 | |
| 74 static BIO_METHOD methods_buffer= | |
| 75 { | |
| 76 BIO_TYPE_BUFFER, | |
| 77 "buffer", | |
| 78 buffer_write, | |
| 79 buffer_read, | |
| 80 buffer_puts, | |
| 81 buffer_gets, | |
| 82 buffer_ctrl, | |
| 83 buffer_new, | |
| 84 buffer_free, | |
| 85 buffer_callback_ctrl, | |
| 86 }; | |
| 87 | |
| 88 BIO_METHOD *BIO_f_buffer(void) | |
| 89 { | |
| 90 return(&methods_buffer); | |
| 91 } | |
| 92 | |
| 93 static int buffer_new(BIO *bi) | |
| 94 { | |
| 95 BIO_F_BUFFER_CTX *ctx; | |
| 96 | |
| 97 ctx=(BIO_F_BUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_F_BUFFER_CTX)); | |
| 98 if (ctx == NULL) return(0); | |
| 99 ctx->ibuf=(char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE); | |
| 100 if (ctx->ibuf == NULL) { OPENSSL_free(ctx); return(0); } | |
| 101 ctx->obuf=(char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE); | |
| 102 if (ctx->obuf == NULL) { OPENSSL_free(ctx->ibuf); OPENSSL_free(ctx); ret
urn(0); } | |
| 103 ctx->ibuf_size=DEFAULT_BUFFER_SIZE; | |
| 104 ctx->obuf_size=DEFAULT_BUFFER_SIZE; | |
| 105 ctx->ibuf_len=0; | |
| 106 ctx->ibuf_off=0; | |
| 107 ctx->obuf_len=0; | |
| 108 ctx->obuf_off=0; | |
| 109 | |
| 110 bi->init=1; | |
| 111 bi->ptr=(char *)ctx; | |
| 112 bi->flags=0; | |
| 113 return(1); | |
| 114 } | |
| 115 | |
| 116 static int buffer_free(BIO *a) | |
| 117 { | |
| 118 BIO_F_BUFFER_CTX *b; | |
| 119 | |
| 120 if (a == NULL) return(0); | |
| 121 b=(BIO_F_BUFFER_CTX *)a->ptr; | |
| 122 if (b->ibuf != NULL) OPENSSL_free(b->ibuf); | |
| 123 if (b->obuf != NULL) OPENSSL_free(b->obuf); | |
| 124 OPENSSL_free(a->ptr); | |
| 125 a->ptr=NULL; | |
| 126 a->init=0; | |
| 127 a->flags=0; | |
| 128 return(1); | |
| 129 } | |
| 130 | |
| 131 static int buffer_read(BIO *b, char *out, int outl) | |
| 132 { | |
| 133 int i,num=0; | |
| 134 BIO_F_BUFFER_CTX *ctx; | |
| 135 | |
| 136 if (out == NULL) return(0); | |
| 137 ctx=(BIO_F_BUFFER_CTX *)b->ptr; | |
| 138 | |
| 139 if ((ctx == NULL) || (b->next_bio == NULL)) return(0); | |
| 140 num=0; | |
| 141 BIO_clear_retry_flags(b); | |
| 142 | |
| 143 start: | |
| 144 i=ctx->ibuf_len; | |
| 145 /* If there is stuff left over, grab it */ | |
| 146 if (i != 0) | |
| 147 { | |
| 148 if (i > outl) i=outl; | |
| 149 memcpy(out,&(ctx->ibuf[ctx->ibuf_off]),i); | |
| 150 ctx->ibuf_off+=i; | |
| 151 ctx->ibuf_len-=i; | |
| 152 num+=i; | |
| 153 if (outl == i) return(num); | |
| 154 outl-=i; | |
| 155 out+=i; | |
| 156 } | |
| 157 | |
| 158 /* We may have done a partial read. try to do more. | |
| 159 * We have nothing in the buffer. | |
| 160 * If we get an error and have read some data, just return it | |
| 161 * and let them retry to get the error again. | |
| 162 * copy direct to parent address space */ | |
| 163 if (outl > ctx->ibuf_size) | |
| 164 { | |
| 165 for (;;) | |
| 166 { | |
| 167 i=BIO_read(b->next_bio,out,outl); | |
| 168 if (i <= 0) | |
| 169 { | |
| 170 BIO_copy_next_retry(b); | |
| 171 if (i < 0) return((num > 0)?num:i); | |
| 172 if (i == 0) return(num); | |
| 173 } | |
| 174 num+=i; | |
| 175 if (outl == i) return(num); | |
| 176 out+=i; | |
| 177 outl-=i; | |
| 178 } | |
| 179 } | |
| 180 /* else */ | |
| 181 | |
| 182 /* we are going to be doing some buffering */ | |
| 183 i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size); | |
| 184 if (i <= 0) | |
| 185 { | |
| 186 BIO_copy_next_retry(b); | |
| 187 if (i < 0) return((num > 0)?num:i); | |
| 188 if (i == 0) return(num); | |
| 189 } | |
| 190 ctx->ibuf_off=0; | |
| 191 ctx->ibuf_len=i; | |
| 192 | |
| 193 /* Lets re-read using ourselves :-) */ | |
| 194 goto start; | |
| 195 } | |
| 196 | |
| 197 static int buffer_write(BIO *b, const char *in, int inl) | |
| 198 { | |
| 199 int i,num=0; | |
| 200 BIO_F_BUFFER_CTX *ctx; | |
| 201 | |
| 202 if ((in == NULL) || (inl <= 0)) return(0); | |
| 203 ctx=(BIO_F_BUFFER_CTX *)b->ptr; | |
| 204 if ((ctx == NULL) || (b->next_bio == NULL)) return(0); | |
| 205 | |
| 206 BIO_clear_retry_flags(b); | |
| 207 start: | |
| 208 i=ctx->obuf_size-(ctx->obuf_len+ctx->obuf_off); | |
| 209 /* add to buffer and return */ | |
| 210 if (i >= inl) | |
| 211 { | |
| 212 memcpy(&(ctx->obuf[ctx->obuf_off+ctx->obuf_len]),in,inl); | |
| 213 ctx->obuf_len+=inl; | |
| 214 return(num+inl); | |
| 215 } | |
| 216 /* else */ | |
| 217 /* stuff already in buffer, so add to it first, then flush */ | |
| 218 if (ctx->obuf_len != 0) | |
| 219 { | |
| 220 if (i > 0) /* lets fill it up if we can */ | |
| 221 { | |
| 222 memcpy(&(ctx->obuf[ctx->obuf_off+ctx->obuf_len]),in,i); | |
| 223 in+=i; | |
| 224 inl-=i; | |
| 225 num+=i; | |
| 226 ctx->obuf_len+=i; | |
| 227 } | |
| 228 /* we now have a full buffer needing flushing */ | |
| 229 for (;;) | |
| 230 { | |
| 231 i=BIO_write(b->next_bio,&(ctx->obuf[ctx->obuf_off]), | |
| 232 ctx->obuf_len); | |
| 233 if (i <= 0) | |
| 234 { | |
| 235 BIO_copy_next_retry(b); | |
| 236 | |
| 237 if (i < 0) return((num > 0)?num:i); | |
| 238 if (i == 0) return(num); | |
| 239 } | |
| 240 ctx->obuf_off+=i; | |
| 241 ctx->obuf_len-=i; | |
| 242 if (ctx->obuf_len == 0) break; | |
| 243 } | |
| 244 } | |
| 245 /* we only get here if the buffer has been flushed and we | |
| 246 * still have stuff to write */ | |
| 247 ctx->obuf_off=0; | |
| 248 | |
| 249 /* we now have inl bytes to write */ | |
| 250 while (inl >= ctx->obuf_size) | |
| 251 { | |
| 252 i=BIO_write(b->next_bio,in,inl); | |
| 253 if (i <= 0) | |
| 254 { | |
| 255 BIO_copy_next_retry(b); | |
| 256 if (i < 0) return((num > 0)?num:i); | |
| 257 if (i == 0) return(num); | |
| 258 } | |
| 259 num+=i; | |
| 260 in+=i; | |
| 261 inl-=i; | |
| 262 if (inl == 0) return(num); | |
| 263 } | |
| 264 | |
| 265 /* copy the rest into the buffer since we have only a small | |
| 266 * amount left */ | |
| 267 goto start; | |
| 268 } | |
| 269 | |
| 270 static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) | |
| 271 { | |
| 272 BIO *dbio; | |
| 273 BIO_F_BUFFER_CTX *ctx; | |
| 274 long ret=1; | |
| 275 char *p1,*p2; | |
| 276 int r,i,*ip; | |
| 277 int ibs,obs; | |
| 278 | |
| 279 ctx=(BIO_F_BUFFER_CTX *)b->ptr; | |
| 280 | |
| 281 switch (cmd) | |
| 282 { | |
| 283 case BIO_CTRL_RESET: | |
| 284 ctx->ibuf_off=0; | |
| 285 ctx->ibuf_len=0; | |
| 286 ctx->obuf_off=0; | |
| 287 ctx->obuf_len=0; | |
| 288 if (b->next_bio == NULL) return(0); | |
| 289 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 290 break; | |
| 291 case BIO_CTRL_INFO: | |
| 292 ret=(long)ctx->obuf_len; | |
| 293 break; | |
| 294 case BIO_C_GET_BUFF_NUM_LINES: | |
| 295 ret=0; | |
| 296 p1=ctx->ibuf; | |
| 297 for (i=0; i<ctx->ibuf_len; i++) | |
| 298 { | |
| 299 if (p1[ctx->ibuf_off + i] == '\n') ret++; | |
| 300 } | |
| 301 break; | |
| 302 case BIO_CTRL_WPENDING: | |
| 303 ret=(long)ctx->obuf_len; | |
| 304 if (ret == 0) | |
| 305 { | |
| 306 if (b->next_bio == NULL) return(0); | |
| 307 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 308 } | |
| 309 break; | |
| 310 case BIO_CTRL_PENDING: | |
| 311 ret=(long)ctx->ibuf_len; | |
| 312 if (ret == 0) | |
| 313 { | |
| 314 if (b->next_bio == NULL) return(0); | |
| 315 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 316 } | |
| 317 break; | |
| 318 case BIO_C_SET_BUFF_READ_DATA: | |
| 319 if (num > ctx->ibuf_size) | |
| 320 { | |
| 321 p1=OPENSSL_malloc((int)num); | |
| 322 if (p1 == NULL) goto malloc_error; | |
| 323 if (ctx->ibuf != NULL) OPENSSL_free(ctx->ibuf); | |
| 324 ctx->ibuf=p1; | |
| 325 } | |
| 326 ctx->ibuf_off=0; | |
| 327 ctx->ibuf_len=(int)num; | |
| 328 memcpy(ctx->ibuf,ptr,(int)num); | |
| 329 ret=1; | |
| 330 break; | |
| 331 case BIO_C_SET_BUFF_SIZE: | |
| 332 if (ptr != NULL) | |
| 333 { | |
| 334 ip=(int *)ptr; | |
| 335 if (*ip == 0) | |
| 336 { | |
| 337 ibs=(int)num; | |
| 338 obs=ctx->obuf_size; | |
| 339 } | |
| 340 else /* if (*ip == 1) */ | |
| 341 { | |
| 342 ibs=ctx->ibuf_size; | |
| 343 obs=(int)num; | |
| 344 } | |
| 345 } | |
| 346 else | |
| 347 { | |
| 348 ibs=(int)num; | |
| 349 obs=(int)num; | |
| 350 } | |
| 351 p1=ctx->ibuf; | |
| 352 p2=ctx->obuf; | |
| 353 if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) | |
| 354 { | |
| 355 p1=(char *)OPENSSL_malloc((int)num); | |
| 356 if (p1 == NULL) goto malloc_error; | |
| 357 } | |
| 358 if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) | |
| 359 { | |
| 360 p2=(char *)OPENSSL_malloc((int)num); | |
| 361 if (p2 == NULL) | |
| 362 { | |
| 363 if (p1 != ctx->ibuf) OPENSSL_free(p1); | |
| 364 goto malloc_error; | |
| 365 } | |
| 366 } | |
| 367 if (ctx->ibuf != p1) | |
| 368 { | |
| 369 OPENSSL_free(ctx->ibuf); | |
| 370 ctx->ibuf=p1; | |
| 371 ctx->ibuf_off=0; | |
| 372 ctx->ibuf_len=0; | |
| 373 ctx->ibuf_size=ibs; | |
| 374 } | |
| 375 if (ctx->obuf != p2) | |
| 376 { | |
| 377 OPENSSL_free(ctx->obuf); | |
| 378 ctx->obuf=p2; | |
| 379 ctx->obuf_off=0; | |
| 380 ctx->obuf_len=0; | |
| 381 ctx->obuf_size=obs; | |
| 382 } | |
| 383 break; | |
| 384 case BIO_C_DO_STATE_MACHINE: | |
| 385 if (b->next_bio == NULL) return(0); | |
| 386 BIO_clear_retry_flags(b); | |
| 387 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 388 BIO_copy_next_retry(b); | |
| 389 break; | |
| 390 | |
| 391 case BIO_CTRL_FLUSH: | |
| 392 if (b->next_bio == NULL) return(0); | |
| 393 if (ctx->obuf_len <= 0) | |
| 394 { | |
| 395 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 396 break; | |
| 397 } | |
| 398 | |
| 399 for (;;) | |
| 400 { | |
| 401 BIO_clear_retry_flags(b); | |
| 402 if (ctx->obuf_len > 0) | |
| 403 { | |
| 404 r=BIO_write(b->next_bio, | |
| 405 &(ctx->obuf[ctx->obuf_off]), | |
| 406 ctx->obuf_len); | |
| 407 #if 0 | |
| 408 fprintf(stderr,"FLUSH [%3d] %3d -> %3d\n",ctx->obuf_off,ctx->obuf_len,r); | |
| 409 #endif | |
| 410 BIO_copy_next_retry(b); | |
| 411 if (r <= 0) return((long)r); | |
| 412 ctx->obuf_off+=r; | |
| 413 ctx->obuf_len-=r; | |
| 414 } | |
| 415 else | |
| 416 { | |
| 417 ctx->obuf_len=0; | |
| 418 ctx->obuf_off=0; | |
| 419 ret=1; | |
| 420 break; | |
| 421 } | |
| 422 } | |
| 423 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 424 break; | |
| 425 case BIO_CTRL_DUP: | |
| 426 dbio=(BIO *)ptr; | |
| 427 if ( !BIO_set_read_buffer_size(dbio,ctx->ibuf_size) || | |
| 428 !BIO_set_write_buffer_size(dbio,ctx->obuf_size)) | |
| 429 ret=0; | |
| 430 break; | |
| 431 default: | |
| 432 if (b->next_bio == NULL) return(0); | |
| 433 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 434 break; | |
| 435 } | |
| 436 return(ret); | |
| 437 malloc_error: | |
| 438 BIOerr(BIO_F_BUFFER_CTRL,ERR_R_MALLOC_FAILURE); | |
| 439 return(0); | |
| 440 } | |
| 441 | |
| 442 static long buffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) | |
| 443 { | |
| 444 long ret=1; | |
| 445 | |
| 446 if (b->next_bio == NULL) return(0); | |
| 447 switch (cmd) | |
| 448 { | |
| 449 default: | |
| 450 ret=BIO_callback_ctrl(b->next_bio,cmd,fp); | |
| 451 break; | |
| 452 } | |
| 453 return(ret); | |
| 454 } | |
| 455 | |
| 456 static int buffer_gets(BIO *b, char *buf, int size) | |
| 457 { | |
| 458 BIO_F_BUFFER_CTX *ctx; | |
| 459 int num=0,i,flag; | |
| 460 char *p; | |
| 461 | |
| 462 ctx=(BIO_F_BUFFER_CTX *)b->ptr; | |
| 463 size--; /* reserve space for a '\0' */ | |
| 464 BIO_clear_retry_flags(b); | |
| 465 | |
| 466 for (;;) | |
| 467 { | |
| 468 if (ctx->ibuf_len > 0) | |
| 469 { | |
| 470 p= &(ctx->ibuf[ctx->ibuf_off]); | |
| 471 flag=0; | |
| 472 for (i=0; (i<ctx->ibuf_len) && (i<size); i++) | |
| 473 { | |
| 474 *(buf++)=p[i]; | |
| 475 if (p[i] == '\n') | |
| 476 { | |
| 477 flag=1; | |
| 478 i++; | |
| 479 break; | |
| 480 } | |
| 481 } | |
| 482 num+=i; | |
| 483 size-=i; | |
| 484 ctx->ibuf_len-=i; | |
| 485 ctx->ibuf_off+=i; | |
| 486 if (flag || size == 0) | |
| 487 { | |
| 488 *buf='\0'; | |
| 489 return(num); | |
| 490 } | |
| 491 } | |
| 492 else /* read another chunk */ | |
| 493 { | |
| 494 i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size); | |
| 495 if (i <= 0) | |
| 496 { | |
| 497 BIO_copy_next_retry(b); | |
| 498 *buf='\0'; | |
| 499 if (i < 0) return((num > 0)?num:i); | |
| 500 if (i == 0) return(num); | |
| 501 } | |
| 502 ctx->ibuf_len=i; | |
| 503 ctx->ibuf_off=0; | |
| 504 } | |
| 505 } | |
| 506 } | |
| 507 | |
| 508 static int buffer_puts(BIO *b, const char *str) | |
| 509 { | |
| 510 return(buffer_write(b,str,strlen(str))); | |
| 511 } | |
| 512 | |
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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