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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 #include <openssl/evp.h> | |
| 64 | |
| 65 static int linebuffer_write(BIO *h, const char *buf,int num); | |
| 66 static int linebuffer_read(BIO *h, char *buf, int size); | |
| 67 static int linebuffer_puts(BIO *h, const char *str); | |
| 68 static int linebuffer_gets(BIO *h, char *str, int size); | |
| 69 static long linebuffer_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
| 70 static int linebuffer_new(BIO *h); | |
| 71 static int linebuffer_free(BIO *data); | |
| 72 static long linebuffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); | |
| 73 | |
| 74 /* A 10k maximum should be enough for most purposes */ | |
| 75 #define DEFAULT_LINEBUFFER_SIZE 1024*10 | |
| 76 | |
| 77 /* #define DEBUG */ | |
| 78 | |
| 79 static BIO_METHOD methods_linebuffer= | |
| 80 { | |
| 81 BIO_TYPE_LINEBUFFER, | |
| 82 "linebuffer", | |
| 83 linebuffer_write, | |
| 84 linebuffer_read, | |
| 85 linebuffer_puts, | |
| 86 linebuffer_gets, | |
| 87 linebuffer_ctrl, | |
| 88 linebuffer_new, | |
| 89 linebuffer_free, | |
| 90 linebuffer_callback_ctrl, | |
| 91 }; | |
| 92 | |
| 93 BIO_METHOD *BIO_f_linebuffer(void) | |
| 94 { | |
| 95 return(&methods_linebuffer); | |
| 96 } | |
| 97 | |
| 98 typedef struct bio_linebuffer_ctx_struct | |
| 99 { | |
| 100 char *obuf; /* the output char array */ | |
| 101 int obuf_size; /* how big is the output buffer */ | |
| 102 int obuf_len; /* how many bytes are in it */ | |
| 103 } BIO_LINEBUFFER_CTX; | |
| 104 | |
| 105 static int linebuffer_new(BIO *bi) | |
| 106 { | |
| 107 BIO_LINEBUFFER_CTX *ctx; | |
| 108 | |
| 109 ctx=(BIO_LINEBUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_LINEBUFFER_CTX)); | |
| 110 if (ctx == NULL) return(0); | |
| 111 ctx->obuf=(char *)OPENSSL_malloc(DEFAULT_LINEBUFFER_SIZE); | |
| 112 if (ctx->obuf == NULL) { OPENSSL_free(ctx); return(0); } | |
| 113 ctx->obuf_size=DEFAULT_LINEBUFFER_SIZE; | |
| 114 ctx->obuf_len=0; | |
| 115 | |
| 116 bi->init=1; | |
| 117 bi->ptr=(char *)ctx; | |
| 118 bi->flags=0; | |
| 119 return(1); | |
| 120 } | |
| 121 | |
| 122 static int linebuffer_free(BIO *a) | |
| 123 { | |
| 124 BIO_LINEBUFFER_CTX *b; | |
| 125 | |
| 126 if (a == NULL) return(0); | |
| 127 b=(BIO_LINEBUFFER_CTX *)a->ptr; | |
| 128 if (b->obuf != NULL) OPENSSL_free(b->obuf); | |
| 129 OPENSSL_free(a->ptr); | |
| 130 a->ptr=NULL; | |
| 131 a->init=0; | |
| 132 a->flags=0; | |
| 133 return(1); | |
| 134 } | |
| 135 | |
| 136 static int linebuffer_read(BIO *b, char *out, int outl) | |
| 137 { | |
| 138 int ret=0; | |
| 139 | |
| 140 if (out == NULL) return(0); | |
| 141 if (b->next_bio == NULL) return(0); | |
| 142 ret=BIO_read(b->next_bio,out,outl); | |
| 143 BIO_clear_retry_flags(b); | |
| 144 BIO_copy_next_retry(b); | |
| 145 return(ret); | |
| 146 } | |
| 147 | |
| 148 static int linebuffer_write(BIO *b, const char *in, int inl) | |
| 149 { | |
| 150 int i,num=0,foundnl; | |
| 151 BIO_LINEBUFFER_CTX *ctx; | |
| 152 | |
| 153 if ((in == NULL) || (inl <= 0)) return(0); | |
| 154 ctx=(BIO_LINEBUFFER_CTX *)b->ptr; | |
| 155 if ((ctx == NULL) || (b->next_bio == NULL)) return(0); | |
| 156 | |
| 157 BIO_clear_retry_flags(b); | |
| 158 | |
| 159 do | |
| 160 { | |
| 161 const char *p; | |
| 162 | |
| 163 for(p = in; p < in + inl && *p != '\n'; p++) | |
| 164 ; | |
| 165 if (*p == '\n') | |
| 166 { | |
| 167 p++; | |
| 168 foundnl = 1; | |
| 169 } | |
| 170 else | |
| 171 foundnl = 0; | |
| 172 | |
| 173 /* If a NL was found and we already have text in the save | |
| 174 buffer, concatenate them and write */ | |
| 175 while ((foundnl || p - in > ctx->obuf_size - ctx->obuf_len) | |
| 176 && ctx->obuf_len > 0) | |
| 177 { | |
| 178 int orig_olen = ctx->obuf_len; | |
| 179 | |
| 180 i = ctx->obuf_size - ctx->obuf_len; | |
| 181 if (p - in > 0) | |
| 182 { | |
| 183 if (i >= p - in) | |
| 184 { | |
| 185 memcpy(&(ctx->obuf[ctx->obuf_len]), | |
| 186 in,p - in); | |
| 187 ctx->obuf_len += p - in; | |
| 188 inl -= p - in; | |
| 189 num += p - in; | |
| 190 in = p; | |
| 191 } | |
| 192 else | |
| 193 { | |
| 194 memcpy(&(ctx->obuf[ctx->obuf_len]), | |
| 195 in,i); | |
| 196 ctx->obuf_len += i; | |
| 197 inl -= i; | |
| 198 in += i; | |
| 199 num += i; | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 #if 0 | |
| 204 BIO_write(b->next_bio, "<*<", 3); | |
| 205 #endif | |
| 206 i=BIO_write(b->next_bio, | |
| 207 ctx->obuf, ctx->obuf_len); | |
| 208 if (i <= 0) | |
| 209 { | |
| 210 ctx->obuf_len = orig_olen; | |
| 211 BIO_copy_next_retry(b); | |
| 212 | |
| 213 #if 0 | |
| 214 BIO_write(b->next_bio, ">*>", 3); | |
| 215 #endif | |
| 216 if (i < 0) return((num > 0)?num:i); | |
| 217 if (i == 0) return(num); | |
| 218 } | |
| 219 #if 0 | |
| 220 BIO_write(b->next_bio, ">*>", 3); | |
| 221 #endif | |
| 222 if (i < ctx->obuf_len) | |
| 223 memmove(ctx->obuf, ctx->obuf + i, | |
| 224 ctx->obuf_len - i); | |
| 225 ctx->obuf_len-=i; | |
| 226 } | |
| 227 | |
| 228 /* Now that the save buffer is emptied, let's write the input | |
| 229 buffer if a NL was found and there is anything to write. */ | |
| 230 if ((foundnl || p - in > ctx->obuf_size) && p - in > 0) | |
| 231 { | |
| 232 #if 0 | |
| 233 BIO_write(b->next_bio, "<*<", 3); | |
| 234 #endif | |
| 235 i=BIO_write(b->next_bio,in,p - in); | |
| 236 if (i <= 0) | |
| 237 { | |
| 238 BIO_copy_next_retry(b); | |
| 239 #if 0 | |
| 240 BIO_write(b->next_bio, ">*>", 3); | |
| 241 #endif | |
| 242 if (i < 0) return((num > 0)?num:i); | |
| 243 if (i == 0) return(num); | |
| 244 } | |
| 245 #if 0 | |
| 246 BIO_write(b->next_bio, ">*>", 3); | |
| 247 #endif | |
| 248 num+=i; | |
| 249 in+=i; | |
| 250 inl-=i; | |
| 251 } | |
| 252 } | |
| 253 while(foundnl && inl > 0); | |
| 254 /* We've written as much as we can. The rest of the input buffer, if | |
| 255 any, is text that doesn't and with a NL and therefore needs to be | |
| 256 saved for the next trip. */ | |
| 257 if (inl > 0) | |
| 258 { | |
| 259 memcpy(&(ctx->obuf[ctx->obuf_len]), in, inl); | |
| 260 ctx->obuf_len += inl; | |
| 261 num += inl; | |
| 262 } | |
| 263 return num; | |
| 264 } | |
| 265 | |
| 266 static long linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr) | |
| 267 { | |
| 268 BIO *dbio; | |
| 269 BIO_LINEBUFFER_CTX *ctx; | |
| 270 long ret=1; | |
| 271 char *p; | |
| 272 int r; | |
| 273 int obs; | |
| 274 | |
| 275 ctx=(BIO_LINEBUFFER_CTX *)b->ptr; | |
| 276 | |
| 277 switch (cmd) | |
| 278 { | |
| 279 case BIO_CTRL_RESET: | |
| 280 ctx->obuf_len=0; | |
| 281 if (b->next_bio == NULL) return(0); | |
| 282 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 283 break; | |
| 284 case BIO_CTRL_INFO: | |
| 285 ret=(long)ctx->obuf_len; | |
| 286 break; | |
| 287 case BIO_CTRL_WPENDING: | |
| 288 ret=(long)ctx->obuf_len; | |
| 289 if (ret == 0) | |
| 290 { | |
| 291 if (b->next_bio == NULL) return(0); | |
| 292 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 293 } | |
| 294 break; | |
| 295 case BIO_C_SET_BUFF_SIZE: | |
| 296 obs=(int)num; | |
| 297 p=ctx->obuf; | |
| 298 if ((obs > DEFAULT_LINEBUFFER_SIZE) && (obs != ctx->obuf_size)) | |
| 299 { | |
| 300 p=(char *)OPENSSL_malloc((int)num); | |
| 301 if (p == NULL) | |
| 302 goto malloc_error; | |
| 303 } | |
| 304 if (ctx->obuf != p) | |
| 305 { | |
| 306 if (ctx->obuf_len > obs) | |
| 307 { | |
| 308 ctx->obuf_len = obs; | |
| 309 } | |
| 310 memcpy(p, ctx->obuf, ctx->obuf_len); | |
| 311 OPENSSL_free(ctx->obuf); | |
| 312 ctx->obuf=p; | |
| 313 ctx->obuf_size=obs; | |
| 314 } | |
| 315 break; | |
| 316 case BIO_C_DO_STATE_MACHINE: | |
| 317 if (b->next_bio == NULL) return(0); | |
| 318 BIO_clear_retry_flags(b); | |
| 319 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 320 BIO_copy_next_retry(b); | |
| 321 break; | |
| 322 | |
| 323 case BIO_CTRL_FLUSH: | |
| 324 if (b->next_bio == NULL) return(0); | |
| 325 if (ctx->obuf_len <= 0) | |
| 326 { | |
| 327 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 328 break; | |
| 329 } | |
| 330 | |
| 331 for (;;) | |
| 332 { | |
| 333 BIO_clear_retry_flags(b); | |
| 334 if (ctx->obuf_len > 0) | |
| 335 { | |
| 336 r=BIO_write(b->next_bio, | |
| 337 ctx->obuf, ctx->obuf_len); | |
| 338 #if 0 | |
| 339 fprintf(stderr,"FLUSH %3d -> %3d\n",ctx->obuf_len,r); | |
| 340 #endif | |
| 341 BIO_copy_next_retry(b); | |
| 342 if (r <= 0) return((long)r); | |
| 343 if (r < ctx->obuf_len) | |
| 344 memmove(ctx->obuf, ctx->obuf + r, | |
| 345 ctx->obuf_len - r); | |
| 346 ctx->obuf_len-=r; | |
| 347 } | |
| 348 else | |
| 349 { | |
| 350 ctx->obuf_len=0; | |
| 351 ret=1; | |
| 352 break; | |
| 353 } | |
| 354 } | |
| 355 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 356 break; | |
| 357 case BIO_CTRL_DUP: | |
| 358 dbio=(BIO *)ptr; | |
| 359 if ( !BIO_set_write_buffer_size(dbio,ctx->obuf_size)) | |
| 360 ret=0; | |
| 361 break; | |
| 362 default: | |
| 363 if (b->next_bio == NULL) return(0); | |
| 364 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); | |
| 365 break; | |
| 366 } | |
| 367 return(ret); | |
| 368 malloc_error: | |
| 369 BIOerr(BIO_F_LINEBUFFER_CTRL,ERR_R_MALLOC_FAILURE); | |
| 370 return(0); | |
| 371 } | |
| 372 | |
| 373 static long linebuffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) | |
| 374 { | |
| 375 long ret=1; | |
| 376 | |
| 377 if (b->next_bio == NULL) return(0); | |
| 378 switch (cmd) | |
| 379 { | |
| 380 default: | |
| 381 ret=BIO_callback_ctrl(b->next_bio,cmd,fp); | |
| 382 break; | |
| 383 } | |
| 384 return(ret); | |
| 385 } | |
| 386 | |
| 387 static int linebuffer_gets(BIO *b, char *buf, int size) | |
| 388 { | |
| 389 if (b->next_bio == NULL) return(0); | |
| 390 return(BIO_gets(b->next_bio,buf,size)); | |
| 391 } | |
| 392 | |
| 393 static int linebuffer_puts(BIO *b, const char *str) | |
| 394 { | |
| 395 return(linebuffer_write(b,str,strlen(str))); | |
| 396 } | |
| 397 | |
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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