155714Skris/* crypto/bio/bf_buff.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280297Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280297Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280297Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280297Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280297Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280297Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include <errno.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/bio.h> 6355714Skris 64280297Sjkimstatic int buffer_write(BIO *h, const char *buf, int num); 6568651Skrisstatic int buffer_read(BIO *h, char *buf, int size); 6668651Skrisstatic int buffer_puts(BIO *h, const char *str); 6768651Skrisstatic int buffer_gets(BIO *h, char *str, int size); 6868651Skrisstatic long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2); 6955714Skrisstatic int buffer_new(BIO *h); 7055714Skrisstatic int buffer_free(BIO *data); 7168651Skrisstatic long buffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); 72280297Sjkim#define DEFAULT_BUFFER_SIZE 4096 7355714Skris 74280297Sjkimstatic BIO_METHOD methods_buffer = { 75280297Sjkim BIO_TYPE_BUFFER, 76280297Sjkim "buffer", 77280297Sjkim buffer_write, 78280297Sjkim buffer_read, 79280297Sjkim buffer_puts, 80280297Sjkim buffer_gets, 81280297Sjkim buffer_ctrl, 82280297Sjkim buffer_new, 83280297Sjkim buffer_free, 84280297Sjkim buffer_callback_ctrl, 85280297Sjkim}; 8655714Skris 8755714SkrisBIO_METHOD *BIO_f_buffer(void) 88280297Sjkim{ 89280297Sjkim return (&methods_buffer); 90280297Sjkim} 9155714Skris 9255714Skrisstatic int buffer_new(BIO *bi) 93280297Sjkim{ 94280297Sjkim BIO_F_BUFFER_CTX *ctx; 9555714Skris 96280297Sjkim ctx = (BIO_F_BUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_F_BUFFER_CTX)); 97280297Sjkim if (ctx == NULL) 98280297Sjkim return (0); 99280297Sjkim ctx->ibuf = (char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE); 100280297Sjkim if (ctx->ibuf == NULL) { 101280297Sjkim OPENSSL_free(ctx); 102280297Sjkim return (0); 103280297Sjkim } 104280297Sjkim ctx->obuf = (char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE); 105280297Sjkim if (ctx->obuf == NULL) { 106280297Sjkim OPENSSL_free(ctx->ibuf); 107280297Sjkim OPENSSL_free(ctx); 108280297Sjkim return (0); 109280297Sjkim } 110280297Sjkim ctx->ibuf_size = DEFAULT_BUFFER_SIZE; 111280297Sjkim ctx->obuf_size = DEFAULT_BUFFER_SIZE; 112280297Sjkim ctx->ibuf_len = 0; 113280297Sjkim ctx->ibuf_off = 0; 114280297Sjkim ctx->obuf_len = 0; 115280297Sjkim ctx->obuf_off = 0; 11655714Skris 117280297Sjkim bi->init = 1; 118280297Sjkim bi->ptr = (char *)ctx; 119280297Sjkim bi->flags = 0; 120280297Sjkim return (1); 121280297Sjkim} 12255714Skris 12355714Skrisstatic int buffer_free(BIO *a) 124280297Sjkim{ 125280297Sjkim BIO_F_BUFFER_CTX *b; 12655714Skris 127280297Sjkim if (a == NULL) 128280297Sjkim return (0); 129280297Sjkim b = (BIO_F_BUFFER_CTX *)a->ptr; 130280297Sjkim if (b->ibuf != NULL) 131280297Sjkim OPENSSL_free(b->ibuf); 132280297Sjkim if (b->obuf != NULL) 133280297Sjkim OPENSSL_free(b->obuf); 134280297Sjkim OPENSSL_free(a->ptr); 135280297Sjkim a->ptr = NULL; 136280297Sjkim a->init = 0; 137280297Sjkim a->flags = 0; 138280297Sjkim return (1); 139280297Sjkim} 140280297Sjkim 14155714Skrisstatic int buffer_read(BIO *b, char *out, int outl) 142280297Sjkim{ 143280297Sjkim int i, num = 0; 144280297Sjkim BIO_F_BUFFER_CTX *ctx; 14555714Skris 146280297Sjkim if (out == NULL) 147280297Sjkim return (0); 148280297Sjkim ctx = (BIO_F_BUFFER_CTX *)b->ptr; 14955714Skris 150280297Sjkim if ((ctx == NULL) || (b->next_bio == NULL)) 151280297Sjkim return (0); 152280297Sjkim num = 0; 153280297Sjkim BIO_clear_retry_flags(b); 15455714Skris 155280297Sjkim start: 156280297Sjkim i = ctx->ibuf_len; 157280297Sjkim /* If there is stuff left over, grab it */ 158280297Sjkim if (i != 0) { 159280297Sjkim if (i > outl) 160280297Sjkim i = outl; 161280297Sjkim memcpy(out, &(ctx->ibuf[ctx->ibuf_off]), i); 162280297Sjkim ctx->ibuf_off += i; 163280297Sjkim ctx->ibuf_len -= i; 164280297Sjkim num += i; 165280297Sjkim if (outl == i) 166280297Sjkim return (num); 167280297Sjkim outl -= i; 168280297Sjkim out += i; 169280297Sjkim } 17055714Skris 171280297Sjkim /* 172280297Sjkim * We may have done a partial read. try to do more. We have nothing in 173280297Sjkim * the buffer. If we get an error and have read some data, just return it 174280297Sjkim * and let them retry to get the error again. copy direct to parent 175280297Sjkim * address space 176280297Sjkim */ 177280297Sjkim if (outl > ctx->ibuf_size) { 178280297Sjkim for (;;) { 179280297Sjkim i = BIO_read(b->next_bio, out, outl); 180280297Sjkim if (i <= 0) { 181280297Sjkim BIO_copy_next_retry(b); 182280297Sjkim if (i < 0) 183280297Sjkim return ((num > 0) ? num : i); 184280297Sjkim if (i == 0) 185280297Sjkim return (num); 186280297Sjkim } 187280297Sjkim num += i; 188280297Sjkim if (outl == i) 189280297Sjkim return (num); 190280297Sjkim out += i; 191280297Sjkim outl -= i; 192280297Sjkim } 193280297Sjkim } 194280297Sjkim /* else */ 19555714Skris 196280297Sjkim /* we are going to be doing some buffering */ 197280297Sjkim i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size); 198280297Sjkim if (i <= 0) { 199280297Sjkim BIO_copy_next_retry(b); 200280297Sjkim if (i < 0) 201280297Sjkim return ((num > 0) ? num : i); 202280297Sjkim if (i == 0) 203280297Sjkim return (num); 204280297Sjkim } 205280297Sjkim ctx->ibuf_off = 0; 206280297Sjkim ctx->ibuf_len = i; 20755714Skris 208280297Sjkim /* Lets re-read using ourselves :-) */ 209280297Sjkim goto start; 210280297Sjkim} 21155714Skris 21268651Skrisstatic int buffer_write(BIO *b, const char *in, int inl) 213280297Sjkim{ 214280297Sjkim int i, num = 0; 215280297Sjkim BIO_F_BUFFER_CTX *ctx; 21655714Skris 217280297Sjkim if ((in == NULL) || (inl <= 0)) 218280297Sjkim return (0); 219280297Sjkim ctx = (BIO_F_BUFFER_CTX *)b->ptr; 220280297Sjkim if ((ctx == NULL) || (b->next_bio == NULL)) 221280297Sjkim return (0); 22255714Skris 223280297Sjkim BIO_clear_retry_flags(b); 224280297Sjkim start: 225280297Sjkim i = ctx->obuf_size - (ctx->obuf_len + ctx->obuf_off); 226280297Sjkim /* add to buffer and return */ 227280297Sjkim if (i >= inl) { 228280297Sjkim memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, inl); 229280297Sjkim ctx->obuf_len += inl; 230280297Sjkim return (num + inl); 231280297Sjkim } 232280297Sjkim /* else */ 233280297Sjkim /* stuff already in buffer, so add to it first, then flush */ 234280297Sjkim if (ctx->obuf_len != 0) { 235280297Sjkim if (i > 0) { /* lets fill it up if we can */ 236280297Sjkim memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, i); 237280297Sjkim in += i; 238280297Sjkim inl -= i; 239280297Sjkim num += i; 240280297Sjkim ctx->obuf_len += i; 241280297Sjkim } 242280297Sjkim /* we now have a full buffer needing flushing */ 243280297Sjkim for (;;) { 244280297Sjkim i = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]), 245280297Sjkim ctx->obuf_len); 246280297Sjkim if (i <= 0) { 247280297Sjkim BIO_copy_next_retry(b); 24855714Skris 249280297Sjkim if (i < 0) 250280297Sjkim return ((num > 0) ? num : i); 251280297Sjkim if (i == 0) 252280297Sjkim return (num); 253280297Sjkim } 254280297Sjkim ctx->obuf_off += i; 255280297Sjkim ctx->obuf_len -= i; 256280297Sjkim if (ctx->obuf_len == 0) 257280297Sjkim break; 258280297Sjkim } 259280297Sjkim } 260280297Sjkim /* 261280297Sjkim * we only get here if the buffer has been flushed and we still have 262280297Sjkim * stuff to write 263280297Sjkim */ 264280297Sjkim ctx->obuf_off = 0; 26555714Skris 266280297Sjkim /* we now have inl bytes to write */ 267280297Sjkim while (inl >= ctx->obuf_size) { 268280297Sjkim i = BIO_write(b->next_bio, in, inl); 269280297Sjkim if (i <= 0) { 270280297Sjkim BIO_copy_next_retry(b); 271280297Sjkim if (i < 0) 272280297Sjkim return ((num > 0) ? num : i); 273280297Sjkim if (i == 0) 274280297Sjkim return (num); 275280297Sjkim } 276280297Sjkim num += i; 277280297Sjkim in += i; 278280297Sjkim inl -= i; 279280297Sjkim if (inl == 0) 280280297Sjkim return (num); 281280297Sjkim } 28255714Skris 283280297Sjkim /* 284280297Sjkim * copy the rest into the buffer since we have only a small amount left 285280297Sjkim */ 286280297Sjkim goto start; 287280297Sjkim} 28855714Skris 28968651Skrisstatic long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) 290280297Sjkim{ 291280297Sjkim BIO *dbio; 292280297Sjkim BIO_F_BUFFER_CTX *ctx; 293280297Sjkim long ret = 1; 294280297Sjkim char *p1, *p2; 295280297Sjkim int r, i, *ip; 296280297Sjkim int ibs, obs; 29755714Skris 298280297Sjkim ctx = (BIO_F_BUFFER_CTX *)b->ptr; 29955714Skris 300280297Sjkim switch (cmd) { 301280297Sjkim case BIO_CTRL_RESET: 302280297Sjkim ctx->ibuf_off = 0; 303280297Sjkim ctx->ibuf_len = 0; 304280297Sjkim ctx->obuf_off = 0; 305280297Sjkim ctx->obuf_len = 0; 306280297Sjkim if (b->next_bio == NULL) 307280297Sjkim return (0); 308280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 309280297Sjkim break; 310280297Sjkim case BIO_CTRL_INFO: 311280297Sjkim ret = (long)ctx->obuf_len; 312280297Sjkim break; 313280297Sjkim case BIO_C_GET_BUFF_NUM_LINES: 314280297Sjkim ret = 0; 315280297Sjkim p1 = ctx->ibuf; 316280297Sjkim for (i = 0; i < ctx->ibuf_len; i++) { 317280297Sjkim if (p1[ctx->ibuf_off + i] == '\n') 318280297Sjkim ret++; 319280297Sjkim } 320280297Sjkim break; 321280297Sjkim case BIO_CTRL_WPENDING: 322280297Sjkim ret = (long)ctx->obuf_len; 323280297Sjkim if (ret == 0) { 324280297Sjkim if (b->next_bio == NULL) 325280297Sjkim return (0); 326280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 327280297Sjkim } 328280297Sjkim break; 329280297Sjkim case BIO_CTRL_PENDING: 330280297Sjkim ret = (long)ctx->ibuf_len; 331280297Sjkim if (ret == 0) { 332280297Sjkim if (b->next_bio == NULL) 333280297Sjkim return (0); 334280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 335280297Sjkim } 336280297Sjkim break; 337280297Sjkim case BIO_C_SET_BUFF_READ_DATA: 338280297Sjkim if (num > ctx->ibuf_size) { 339280297Sjkim p1 = OPENSSL_malloc((int)num); 340280297Sjkim if (p1 == NULL) 341280297Sjkim goto malloc_error; 342280297Sjkim if (ctx->ibuf != NULL) 343280297Sjkim OPENSSL_free(ctx->ibuf); 344280297Sjkim ctx->ibuf = p1; 345280297Sjkim } 346280297Sjkim ctx->ibuf_off = 0; 347280297Sjkim ctx->ibuf_len = (int)num; 348280297Sjkim memcpy(ctx->ibuf, ptr, (int)num); 349280297Sjkim ret = 1; 350280297Sjkim break; 351280297Sjkim case BIO_C_SET_BUFF_SIZE: 352280297Sjkim if (ptr != NULL) { 353280297Sjkim ip = (int *)ptr; 354280297Sjkim if (*ip == 0) { 355280297Sjkim ibs = (int)num; 356280297Sjkim obs = ctx->obuf_size; 357280297Sjkim } else { /* if (*ip == 1) */ 35855714Skris 359280297Sjkim ibs = ctx->ibuf_size; 360280297Sjkim obs = (int)num; 361280297Sjkim } 362280297Sjkim } else { 363280297Sjkim ibs = (int)num; 364280297Sjkim obs = (int)num; 365280297Sjkim } 366280297Sjkim p1 = ctx->ibuf; 367280297Sjkim p2 = ctx->obuf; 368280297Sjkim if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) { 369280297Sjkim p1 = (char *)OPENSSL_malloc((int)num); 370280297Sjkim if (p1 == NULL) 371280297Sjkim goto malloc_error; 372280297Sjkim } 373280297Sjkim if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) { 374280297Sjkim p2 = (char *)OPENSSL_malloc((int)num); 375280297Sjkim if (p2 == NULL) { 376280297Sjkim if (p1 != ctx->ibuf) 377280297Sjkim OPENSSL_free(p1); 378280297Sjkim goto malloc_error; 379280297Sjkim } 380280297Sjkim } 381280297Sjkim if (ctx->ibuf != p1) { 382280297Sjkim OPENSSL_free(ctx->ibuf); 383280297Sjkim ctx->ibuf = p1; 384280297Sjkim ctx->ibuf_off = 0; 385280297Sjkim ctx->ibuf_len = 0; 386280297Sjkim ctx->ibuf_size = ibs; 387280297Sjkim } 388280297Sjkim if (ctx->obuf != p2) { 389280297Sjkim OPENSSL_free(ctx->obuf); 390280297Sjkim ctx->obuf = p2; 391280297Sjkim ctx->obuf_off = 0; 392280297Sjkim ctx->obuf_len = 0; 393280297Sjkim ctx->obuf_size = obs; 394280297Sjkim } 395280297Sjkim break; 396280297Sjkim case BIO_C_DO_STATE_MACHINE: 397280297Sjkim if (b->next_bio == NULL) 398280297Sjkim return (0); 399280297Sjkim BIO_clear_retry_flags(b); 400280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 401280297Sjkim BIO_copy_next_retry(b); 402280297Sjkim break; 40355714Skris 404280297Sjkim case BIO_CTRL_FLUSH: 405280297Sjkim if (b->next_bio == NULL) 406280297Sjkim return (0); 407280297Sjkim if (ctx->obuf_len <= 0) { 408280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 409280297Sjkim break; 410280297Sjkim } 411280297Sjkim 412280297Sjkim for (;;) { 413280297Sjkim BIO_clear_retry_flags(b); 414280297Sjkim if (ctx->obuf_len > 0) { 415280297Sjkim r = BIO_write(b->next_bio, 416280297Sjkim &(ctx->obuf[ctx->obuf_off]), ctx->obuf_len); 41755714Skris#if 0 418280297Sjkim fprintf(stderr, "FLUSH [%3d] %3d -> %3d\n", ctx->obuf_off, 419280297Sjkim ctx->obuf_len, r); 42055714Skris#endif 421280297Sjkim BIO_copy_next_retry(b); 422280297Sjkim if (r <= 0) 423280297Sjkim return ((long)r); 424280297Sjkim ctx->obuf_off += r; 425280297Sjkim ctx->obuf_len -= r; 426280297Sjkim } else { 427280297Sjkim ctx->obuf_len = 0; 428280297Sjkim ctx->obuf_off = 0; 429280297Sjkim ret = 1; 430280297Sjkim break; 431280297Sjkim } 432280297Sjkim } 433280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 434280297Sjkim break; 435280297Sjkim case BIO_CTRL_DUP: 436280297Sjkim dbio = (BIO *)ptr; 437280297Sjkim if (!BIO_set_read_buffer_size(dbio, ctx->ibuf_size) || 438280297Sjkim !BIO_set_write_buffer_size(dbio, ctx->obuf_size)) 439280297Sjkim ret = 0; 440280297Sjkim break; 441280297Sjkim default: 442280297Sjkim if (b->next_bio == NULL) 443280297Sjkim return (0); 444280297Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 445280297Sjkim break; 446280297Sjkim } 447280297Sjkim return (ret); 448280297Sjkim malloc_error: 449280297Sjkim BIOerr(BIO_F_BUFFER_CTRL, ERR_R_MALLOC_FAILURE); 450280297Sjkim return (0); 451280297Sjkim} 45255714Skris 45368651Skrisstatic long buffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) 454280297Sjkim{ 455280297Sjkim long ret = 1; 45659191Skris 457280297Sjkim if (b->next_bio == NULL) 458280297Sjkim return (0); 459280297Sjkim switch (cmd) { 460280297Sjkim default: 461280297Sjkim ret = BIO_callback_ctrl(b->next_bio, cmd, fp); 462280297Sjkim break; 463280297Sjkim } 464280297Sjkim return (ret); 465280297Sjkim} 46659191Skris 46755714Skrisstatic int buffer_gets(BIO *b, char *buf, int size) 468280297Sjkim{ 469280297Sjkim BIO_F_BUFFER_CTX *ctx; 470280297Sjkim int num = 0, i, flag; 471280297Sjkim char *p; 47255714Skris 473280297Sjkim ctx = (BIO_F_BUFFER_CTX *)b->ptr; 474280297Sjkim size--; /* reserve space for a '\0' */ 475280297Sjkim BIO_clear_retry_flags(b); 47655714Skris 477280297Sjkim for (;;) { 478280297Sjkim if (ctx->ibuf_len > 0) { 479280297Sjkim p = &(ctx->ibuf[ctx->ibuf_off]); 480280297Sjkim flag = 0; 481280297Sjkim for (i = 0; (i < ctx->ibuf_len) && (i < size); i++) { 482280297Sjkim *(buf++) = p[i]; 483280297Sjkim if (p[i] == '\n') { 484280297Sjkim flag = 1; 485280297Sjkim i++; 486280297Sjkim break; 487280297Sjkim } 488280297Sjkim } 489280297Sjkim num += i; 490280297Sjkim size -= i; 491280297Sjkim ctx->ibuf_len -= i; 492280297Sjkim ctx->ibuf_off += i; 493280297Sjkim if (flag || size == 0) { 494280297Sjkim *buf = '\0'; 495280297Sjkim return (num); 496280297Sjkim } 497280297Sjkim } else { /* read another chunk */ 49855714Skris 499280297Sjkim i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size); 500280297Sjkim if (i <= 0) { 501280297Sjkim BIO_copy_next_retry(b); 502280297Sjkim *buf = '\0'; 503280297Sjkim if (i < 0) 504280297Sjkim return ((num > 0) ? num : i); 505280297Sjkim if (i == 0) 506280297Sjkim return (num); 507280297Sjkim } 508280297Sjkim ctx->ibuf_len = i; 509280297Sjkim ctx->ibuf_off = 0; 510280297Sjkim } 511280297Sjkim } 512280297Sjkim} 513280297Sjkim 51468651Skrisstatic int buffer_puts(BIO *b, const char *str) 515280297Sjkim{ 516280297Sjkim return (buffer_write(b, str, strlen(str))); 517280297Sjkim} 518