wolf SSL / wolfSSL

wolfSSL SSL/TLS library, support up to TLS1.3

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src/bio.c@12:1a06964c2adb, 2017-08-22 (annotated)

Committer:
wolfSSL
Date:
Tue Aug 22 10:47:28 2017 +0000
Revision:
12:1a06964c2adb
wolfSSL 3.12.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 12:1a06964c2adb 1 /* bio.c
wolfSSL 12:1a06964c2adb 2 *
wolfSSL 12:1a06964c2adb 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 12:1a06964c2adb 4 *
wolfSSL 12:1a06964c2adb 5 * This file is part of wolfSSL.
wolfSSL 12:1a06964c2adb 6 *
wolfSSL 12:1a06964c2adb 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 12:1a06964c2adb 8 * it under the terms of the GNU General Public License as published by
wolfSSL 12:1a06964c2adb 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 12:1a06964c2adb 10 * (at your option) any later version.
wolfSSL 12:1a06964c2adb 11 *
wolfSSL 12:1a06964c2adb 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 12:1a06964c2adb 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 12:1a06964c2adb 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 12:1a06964c2adb 15 * GNU General Public License for more details.
wolfSSL 12:1a06964c2adb 16 *
wolfSSL 12:1a06964c2adb 17 * You should have received a copy of the GNU General Public License
wolfSSL 12:1a06964c2adb 18 * along with this program; if not, write to the Free Software
wolfSSL 12:1a06964c2adb 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 12:1a06964c2adb 20 */
wolfSSL 12:1a06964c2adb 21
wolfSSL 12:1a06964c2adb 22 #if !defined(WOLFSSL_BIO_INCLUDED)
wolfSSL 12:1a06964c2adb 23 #warning bio.c does not need to be compiled seperatly from ssl.c
wolfSSL 12:1a06964c2adb 24 #else
wolfSSL 12:1a06964c2adb 25
wolfSSL 12:1a06964c2adb 26 /*** TBD ***/
wolfSSL 12:1a06964c2adb 27 WOLFSSL_API long wolfSSL_BIO_ctrl(WOLFSSL_BIO *bio, int cmd, long larg, void *parg)
wolfSSL 12:1a06964c2adb 28 {
wolfSSL 12:1a06964c2adb 29 (void)bio;
wolfSSL 12:1a06964c2adb 30 (void)cmd;
wolfSSL 12:1a06964c2adb 31 (void)larg;
wolfSSL 12:1a06964c2adb 32 (void)parg;
wolfSSL 12:1a06964c2adb 33
wolfSSL 12:1a06964c2adb 34 WOLFSSL_ENTER("BIO_ctrl");
wolfSSL 12:1a06964c2adb 35 return 1;
wolfSSL 12:1a06964c2adb 36 }
wolfSSL 12:1a06964c2adb 37
wolfSSL 12:1a06964c2adb 38
wolfSSL 12:1a06964c2adb 39 /* Return the number of pending bytes in read and write buffers */
wolfSSL 12:1a06964c2adb 40 size_t wolfSSL_BIO_ctrl_pending(WOLFSSL_BIO *bio)
wolfSSL 12:1a06964c2adb 41 {
wolfSSL 12:1a06964c2adb 42 WOLFSSL_ENTER("BIO_ctrl_pending");
wolfSSL 12:1a06964c2adb 43 if (bio == NULL) {
wolfSSL 12:1a06964c2adb 44 return 0;
wolfSSL 12:1a06964c2adb 45 }
wolfSSL 12:1a06964c2adb 46
wolfSSL 12:1a06964c2adb 47 if (bio->ssl != NULL) {
wolfSSL 12:1a06964c2adb 48 return (long)wolfSSL_pending(bio->ssl);
wolfSSL 12:1a06964c2adb 49 }
wolfSSL 12:1a06964c2adb 50
wolfSSL 12:1a06964c2adb 51 if (bio->type == BIO_MEMORY) {
wolfSSL 12:1a06964c2adb 52 return bio->memLen;
wolfSSL 12:1a06964c2adb 53 }
wolfSSL 12:1a06964c2adb 54
wolfSSL 12:1a06964c2adb 55 /* type BIO_BIO then check paired buffer */
wolfSSL 12:1a06964c2adb 56 if (bio->type == BIO_BIO && bio->pair != NULL) {
wolfSSL 12:1a06964c2adb 57 WOLFSSL_BIO* pair = bio->pair;
wolfSSL 12:1a06964c2adb 58 if (pair->wrIdx > 0 && pair->wrIdx <= pair->rdIdx) {
wolfSSL 12:1a06964c2adb 59 /* in wrap around state where begining of buffer is being
wolfSSL 12:1a06964c2adb 60 * overwritten */
wolfSSL 12:1a06964c2adb 61 return pair->wrSz - pair->rdIdx + pair->wrIdx;
wolfSSL 12:1a06964c2adb 62 }
wolfSSL 12:1a06964c2adb 63 else {
wolfSSL 12:1a06964c2adb 64 /* simple case where has not wrapped around */
wolfSSL 12:1a06964c2adb 65 return pair->wrIdx - pair->rdIdx;
wolfSSL 12:1a06964c2adb 66 }
wolfSSL 12:1a06964c2adb 67 }
wolfSSL 12:1a06964c2adb 68
wolfSSL 12:1a06964c2adb 69 return 0;
wolfSSL 12:1a06964c2adb 70 }
wolfSSL 12:1a06964c2adb 71
wolfSSL 12:1a06964c2adb 72
wolfSSL 12:1a06964c2adb 73 long wolfSSL_BIO_get_mem_ptr(WOLFSSL_BIO *bio, WOLFSSL_BUF_MEM **ptr)
wolfSSL 12:1a06964c2adb 74 {
wolfSSL 12:1a06964c2adb 75 WOLFSSL_ENTER("BIO_get_mem_ptr");
wolfSSL 12:1a06964c2adb 76
wolfSSL 12:1a06964c2adb 77 if (bio == NULL || ptr == NULL) {
wolfSSL 12:1a06964c2adb 78 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 79 }
wolfSSL 12:1a06964c2adb 80
wolfSSL 12:1a06964c2adb 81 *ptr = (WOLFSSL_BUF_MEM*)(bio->mem);
wolfSSL 12:1a06964c2adb 82 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 83 }
wolfSSL 12:1a06964c2adb 84
wolfSSL 12:1a06964c2adb 85 /*** TBD ***/
wolfSSL 12:1a06964c2adb 86 WOLFSSL_API long wolfSSL_BIO_int_ctrl(WOLFSSL_BIO *bp, int cmd, long larg, int iarg)
wolfSSL 12:1a06964c2adb 87 {
wolfSSL 12:1a06964c2adb 88 (void) bp;
wolfSSL 12:1a06964c2adb 89 (void) cmd;
wolfSSL 12:1a06964c2adb 90 (void) larg;
wolfSSL 12:1a06964c2adb 91 (void) iarg;
wolfSSL 12:1a06964c2adb 92 WOLFSSL_ENTER("BIO_int_ctrl");
wolfSSL 12:1a06964c2adb 93 return 0;
wolfSSL 12:1a06964c2adb 94 }
wolfSSL 12:1a06964c2adb 95
wolfSSL 12:1a06964c2adb 96
wolfSSL 12:1a06964c2adb 97 int wolfSSL_BIO_set_write_buf_size(WOLFSSL_BIO *bio, long size)
wolfSSL 12:1a06964c2adb 98 {
wolfSSL 12:1a06964c2adb 99 WOLFSSL_ENTER("wolfSSL_BIO_set_write_buf_size");
wolfSSL 12:1a06964c2adb 100
wolfSSL 12:1a06964c2adb 101 if (bio == NULL || bio->type != BIO_BIO || size < 0) {
wolfSSL 12:1a06964c2adb 102 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 103 }
wolfSSL 12:1a06964c2adb 104
wolfSSL 12:1a06964c2adb 105 /* if already in pair then do not change size */
wolfSSL 12:1a06964c2adb 106 if (bio->pair != NULL) {
wolfSSL 12:1a06964c2adb 107 WOLFSSL_MSG("WOLFSSL_BIO is paired, free from pair before changing");
wolfSSL 12:1a06964c2adb 108 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 109 }
wolfSSL 12:1a06964c2adb 110
wolfSSL 12:1a06964c2adb 111 bio->wrSz = (int)size;
wolfSSL 12:1a06964c2adb 112 if (bio->wrSz < 0) {
wolfSSL 12:1a06964c2adb 113 WOLFSSL_MSG("Unexpected negative size value");
wolfSSL 12:1a06964c2adb 114 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 115 }
wolfSSL 12:1a06964c2adb 116
wolfSSL 12:1a06964c2adb 117 if (bio->mem != NULL) {
wolfSSL 12:1a06964c2adb 118 XFREE(bio->mem, bio->heap, DYNAMIC_TYPE_OPENSSL);
wolfSSL 12:1a06964c2adb 119 }
wolfSSL 12:1a06964c2adb 120
wolfSSL 12:1a06964c2adb 121 bio->mem = (byte*)XMALLOC(bio->wrSz, bio->heap, DYNAMIC_TYPE_OPENSSL);
wolfSSL 12:1a06964c2adb 122 if (bio->mem == NULL) {
wolfSSL 12:1a06964c2adb 123 WOLFSSL_MSG("Memory allocation error");
wolfSSL 12:1a06964c2adb 124 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 125 }
wolfSSL 12:1a06964c2adb 126 bio->wrIdx = 0;
wolfSSL 12:1a06964c2adb 127 bio->rdIdx = 0;
wolfSSL 12:1a06964c2adb 128
wolfSSL 12:1a06964c2adb 129 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 130 }
wolfSSL 12:1a06964c2adb 131
wolfSSL 12:1a06964c2adb 132
wolfSSL 12:1a06964c2adb 133 /* Joins two BIO_BIO types. The write of b1 goes to the read of b2 and vise
wolfSSL 12:1a06964c2adb 134 * versa. Creating something similar to a two way pipe.
wolfSSL 12:1a06964c2adb 135 * Reading and writing between the two BIOs is not thread safe, they are
wolfSSL 12:1a06964c2adb 136 * expected to be used by the same thread. */
wolfSSL 12:1a06964c2adb 137 int wolfSSL_BIO_make_bio_pair(WOLFSSL_BIO *b1, WOLFSSL_BIO *b2)
wolfSSL 12:1a06964c2adb 138 {
wolfSSL 12:1a06964c2adb 139 WOLFSSL_ENTER("wolfSSL_BIO_make_bio_pair");
wolfSSL 12:1a06964c2adb 140
wolfSSL 12:1a06964c2adb 141 if (b1 == NULL || b2 == NULL) {
wolfSSL 12:1a06964c2adb 142 WOLFSSL_LEAVE("wolfSSL_BIO_make_bio_pair", BAD_FUNC_ARG);
wolfSSL 12:1a06964c2adb 143 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 144 }
wolfSSL 12:1a06964c2adb 145
wolfSSL 12:1a06964c2adb 146 /* both are expected to be of type BIO and not already paired */
wolfSSL 12:1a06964c2adb 147 if (b1->type != BIO_BIO || b2->type != BIO_BIO ||
wolfSSL 12:1a06964c2adb 148 b1->pair != NULL || b2->pair != NULL) {
wolfSSL 12:1a06964c2adb 149 WOLFSSL_MSG("Expected type BIO and not already paired");
wolfSSL 12:1a06964c2adb 150 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 151 }
wolfSSL 12:1a06964c2adb 152
wolfSSL 12:1a06964c2adb 153 /* set default write size if not already set */
wolfSSL 12:1a06964c2adb 154 if (b1->mem == NULL && wolfSSL_BIO_set_write_buf_size(b1,
wolfSSL 12:1a06964c2adb 155 WOLFSSL_BIO_SIZE) != SSL_SUCCESS) {
wolfSSL 12:1a06964c2adb 156 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 157 }
wolfSSL 12:1a06964c2adb 158
wolfSSL 12:1a06964c2adb 159 if (b2->mem == NULL && wolfSSL_BIO_set_write_buf_size(b2,
wolfSSL 12:1a06964c2adb 160 WOLFSSL_BIO_SIZE) != SSL_SUCCESS) {
wolfSSL 12:1a06964c2adb 161 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 162 }
wolfSSL 12:1a06964c2adb 163
wolfSSL 12:1a06964c2adb 164 b1->pair = b2;
wolfSSL 12:1a06964c2adb 165 b2->pair = b1;
wolfSSL 12:1a06964c2adb 166
wolfSSL 12:1a06964c2adb 167 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 168 }
wolfSSL 12:1a06964c2adb 169
wolfSSL 12:1a06964c2adb 170
wolfSSL 12:1a06964c2adb 171 int wolfSSL_BIO_ctrl_reset_read_request(WOLFSSL_BIO *b)
wolfSSL 12:1a06964c2adb 172 {
wolfSSL 12:1a06964c2adb 173 WOLFSSL_ENTER("wolfSSL_BIO_ctrl_reset_read_request");
wolfSSL 12:1a06964c2adb 174
wolfSSL 12:1a06964c2adb 175 if (b == NULL) {
wolfSSL 12:1a06964c2adb 176 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 177 }
wolfSSL 12:1a06964c2adb 178
wolfSSL 12:1a06964c2adb 179 b->readRq = 0;
wolfSSL 12:1a06964c2adb 180
wolfSSL 12:1a06964c2adb 181 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 182 }
wolfSSL 12:1a06964c2adb 183
wolfSSL 12:1a06964c2adb 184
wolfSSL 12:1a06964c2adb 185 /* Does not advance read index pointer */
wolfSSL 12:1a06964c2adb 186 int wolfSSL_BIO_nread0(WOLFSSL_BIO *bio, char **buf)
wolfSSL 12:1a06964c2adb 187 {
wolfSSL 12:1a06964c2adb 188 WOLFSSL_ENTER("wolfSSL_BIO_nread0");
wolfSSL 12:1a06964c2adb 189
wolfSSL 12:1a06964c2adb 190 if (bio == NULL || buf == NULL) {
wolfSSL 12:1a06964c2adb 191 WOLFSSL_MSG("NULL argument passed in");
wolfSSL 12:1a06964c2adb 192 return 0;
wolfSSL 12:1a06964c2adb 193 }
wolfSSL 12:1a06964c2adb 194
wolfSSL 12:1a06964c2adb 195 /* if paired read from pair */
wolfSSL 12:1a06964c2adb 196 if (bio->pair != NULL) {
wolfSSL 12:1a06964c2adb 197 WOLFSSL_BIO* pair = bio->pair;
wolfSSL 12:1a06964c2adb 198
wolfSSL 12:1a06964c2adb 199 /* case where have wrapped around write buffer */
wolfSSL 12:1a06964c2adb 200 *buf = (char*)pair->mem + pair->rdIdx;
wolfSSL 12:1a06964c2adb 201 if (pair->wrIdx > 0 && pair->rdIdx >= pair->wrIdx) {
wolfSSL 12:1a06964c2adb 202 return pair->wrSz - pair->rdIdx;
wolfSSL 12:1a06964c2adb 203 }
wolfSSL 12:1a06964c2adb 204 else {
wolfSSL 12:1a06964c2adb 205 return pair->wrIdx - pair->rdIdx;
wolfSSL 12:1a06964c2adb 206 }
wolfSSL 12:1a06964c2adb 207 }
wolfSSL 12:1a06964c2adb 208
wolfSSL 12:1a06964c2adb 209 return 0;
wolfSSL 12:1a06964c2adb 210 }
wolfSSL 12:1a06964c2adb 211
wolfSSL 12:1a06964c2adb 212
wolfSSL 12:1a06964c2adb 213 /* similar to wolfSSL_BIO_nread0 but advances the read index */
wolfSSL 12:1a06964c2adb 214 int wolfSSL_BIO_nread(WOLFSSL_BIO *bio, char **buf, int num)
wolfSSL 12:1a06964c2adb 215 {
wolfSSL 12:1a06964c2adb 216 int sz = WOLFSSL_BIO_UNSET;
wolfSSL 12:1a06964c2adb 217
wolfSSL 12:1a06964c2adb 218 WOLFSSL_ENTER("wolfSSL_BIO_nread");
wolfSSL 12:1a06964c2adb 219
wolfSSL 12:1a06964c2adb 220 if (bio == NULL || buf == NULL) {
wolfSSL 12:1a06964c2adb 221 WOLFSSL_MSG("NULL argument passed in");
wolfSSL 12:1a06964c2adb 222 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 223 }
wolfSSL 12:1a06964c2adb 224
wolfSSL 12:1a06964c2adb 225 if (bio->pair != NULL) {
wolfSSL 12:1a06964c2adb 226 /* special case if asking to read 0 bytes */
wolfSSL 12:1a06964c2adb 227 if (num == 0) {
wolfSSL 12:1a06964c2adb 228 *buf = (char*)bio->pair->mem + bio->pair->rdIdx;
wolfSSL 12:1a06964c2adb 229 return 0;
wolfSSL 12:1a06964c2adb 230 }
wolfSSL 12:1a06964c2adb 231
wolfSSL 12:1a06964c2adb 232 /* get amount able to read and set buffer pointer */
wolfSSL 12:1a06964c2adb 233 sz = wolfSSL_BIO_nread0(bio, buf);
wolfSSL 12:1a06964c2adb 234 if (sz == 0) {
wolfSSL 12:1a06964c2adb 235 return WOLFSSL_BIO_ERROR;
wolfSSL 12:1a06964c2adb 236 }
wolfSSL 12:1a06964c2adb 237
wolfSSL 12:1a06964c2adb 238 if (num < sz) {
wolfSSL 12:1a06964c2adb 239 sz = num;
wolfSSL 12:1a06964c2adb 240 }
wolfSSL 12:1a06964c2adb 241 bio->pair->rdIdx += sz;
wolfSSL 12:1a06964c2adb 242
wolfSSL 12:1a06964c2adb 243 /* check if have read to the end of the buffer and need to reset */
wolfSSL 12:1a06964c2adb 244 if (bio->pair->rdIdx == bio->pair->wrSz) {
wolfSSL 12:1a06964c2adb 245 bio->pair->rdIdx = 0;
wolfSSL 12:1a06964c2adb 246 if (bio->pair->wrIdx == bio->pair->wrSz) {
wolfSSL 12:1a06964c2adb 247 bio->pair->wrIdx = 0;
wolfSSL 12:1a06964c2adb 248 }
wolfSSL 12:1a06964c2adb 249 }
wolfSSL 12:1a06964c2adb 250
wolfSSL 12:1a06964c2adb 251 /* check if read up to write index, if so then reset indexs */
wolfSSL 12:1a06964c2adb 252 if (bio->pair->rdIdx == bio->pair->wrIdx) {
wolfSSL 12:1a06964c2adb 253 bio->pair->rdIdx = 0;
wolfSSL 12:1a06964c2adb 254 bio->pair->wrIdx = 0;
wolfSSL 12:1a06964c2adb 255 }
wolfSSL 12:1a06964c2adb 256 }
wolfSSL 12:1a06964c2adb 257
wolfSSL 12:1a06964c2adb 258 return sz;
wolfSSL 12:1a06964c2adb 259 }
wolfSSL 12:1a06964c2adb 260
wolfSSL 12:1a06964c2adb 261
wolfSSL 12:1a06964c2adb 262 int wolfSSL_BIO_nwrite(WOLFSSL_BIO *bio, char **buf, int num)
wolfSSL 12:1a06964c2adb 263 {
wolfSSL 12:1a06964c2adb 264 int sz = WOLFSSL_BIO_UNSET;
wolfSSL 12:1a06964c2adb 265
wolfSSL 12:1a06964c2adb 266 WOLFSSL_ENTER("wolfSSL_BIO_nwrite");
wolfSSL 12:1a06964c2adb 267
wolfSSL 12:1a06964c2adb 268 if (bio == NULL || buf == NULL) {
wolfSSL 12:1a06964c2adb 269 WOLFSSL_MSG("NULL argument passed in");
wolfSSL 12:1a06964c2adb 270 return 0;
wolfSSL 12:1a06964c2adb 271 }
wolfSSL 12:1a06964c2adb 272
wolfSSL 12:1a06964c2adb 273 if (bio->pair != NULL) {
wolfSSL 12:1a06964c2adb 274 if (num == 0) {
wolfSSL 12:1a06964c2adb 275 *buf = (char*)bio->mem + bio->wrIdx;
wolfSSL 12:1a06964c2adb 276 return 0;
wolfSSL 12:1a06964c2adb 277 }
wolfSSL 12:1a06964c2adb 278
wolfSSL 12:1a06964c2adb 279 if (bio->wrIdx < bio->rdIdx) {
wolfSSL 12:1a06964c2adb 280 /* if wrapped around only write up to read index. In this case
wolfSSL 12:1a06964c2adb 281 * rdIdx is always greater then wrIdx so sz will not be negative. */
wolfSSL 12:1a06964c2adb 282 sz = bio->rdIdx - bio->wrIdx;
wolfSSL 12:1a06964c2adb 283 }
wolfSSL 12:1a06964c2adb 284 else if (bio->rdIdx > 0 && bio->wrIdx == bio->rdIdx) {
wolfSSL 12:1a06964c2adb 285 return WOLFSSL_BIO_ERROR; /* no more room to write */
wolfSSL 12:1a06964c2adb 286 }
wolfSSL 12:1a06964c2adb 287 else {
wolfSSL 12:1a06964c2adb 288 /* write index is past read index so write to end of buffer */
wolfSSL 12:1a06964c2adb 289 sz = bio->wrSz - bio->wrIdx;
wolfSSL 12:1a06964c2adb 290
wolfSSL 12:1a06964c2adb 291 if (sz <= 0) {
wolfSSL 12:1a06964c2adb 292 /* either an error has occured with write index or it is at the
wolfSSL 12:1a06964c2adb 293 * end of the write buffer. */
wolfSSL 12:1a06964c2adb 294 if (bio->rdIdx == 0) {
wolfSSL 12:1a06964c2adb 295 /* no more room, nothing has been read */
wolfSSL 12:1a06964c2adb 296 return WOLFSSL_BIO_ERROR;
wolfSSL 12:1a06964c2adb 297 }
wolfSSL 12:1a06964c2adb 298
wolfSSL 12:1a06964c2adb 299 bio->wrIdx = 0;
wolfSSL 12:1a06964c2adb 300
wolfSSL 12:1a06964c2adb 301 /* check case where read index is not at 0 */
wolfSSL 12:1a06964c2adb 302 if (bio->rdIdx > 0) {
wolfSSL 12:1a06964c2adb 303 sz = bio->rdIdx; /* can write up to the read index */
wolfSSL 12:1a06964c2adb 304 }
wolfSSL 12:1a06964c2adb 305 else {
wolfSSL 12:1a06964c2adb 306 sz = bio->wrSz; /* no restriction other then buffer size */
wolfSSL 12:1a06964c2adb 307 }
wolfSSL 12:1a06964c2adb 308 }
wolfSSL 12:1a06964c2adb 309 }
wolfSSL 12:1a06964c2adb 310
wolfSSL 12:1a06964c2adb 311 if (num < sz) {
wolfSSL 12:1a06964c2adb 312 sz = num;
wolfSSL 12:1a06964c2adb 313 }
wolfSSL 12:1a06964c2adb 314 *buf = (char*)bio->mem + bio->wrIdx;
wolfSSL 12:1a06964c2adb 315 bio->wrIdx += sz;
wolfSSL 12:1a06964c2adb 316
wolfSSL 12:1a06964c2adb 317 /* if at the end of the buffer and space for wrap around then set
wolfSSL 12:1a06964c2adb 318 * write index back to 0 */
wolfSSL 12:1a06964c2adb 319 if (bio->wrIdx == bio->wrSz && bio->rdIdx > 0) {
wolfSSL 12:1a06964c2adb 320 bio->wrIdx = 0;
wolfSSL 12:1a06964c2adb 321 }
wolfSSL 12:1a06964c2adb 322 }
wolfSSL 12:1a06964c2adb 323
wolfSSL 12:1a06964c2adb 324 return sz;
wolfSSL 12:1a06964c2adb 325 }
wolfSSL 12:1a06964c2adb 326
wolfSSL 12:1a06964c2adb 327
wolfSSL 12:1a06964c2adb 328 /* Reset BIO to initial state */
wolfSSL 12:1a06964c2adb 329 int wolfSSL_BIO_reset(WOLFSSL_BIO *bio)
wolfSSL 12:1a06964c2adb 330 {
wolfSSL 12:1a06964c2adb 331 WOLFSSL_ENTER("wolfSSL_BIO_reset");
wolfSSL 12:1a06964c2adb 332
wolfSSL 12:1a06964c2adb 333 if (bio == NULL) {
wolfSSL 12:1a06964c2adb 334 WOLFSSL_MSG("NULL argument passed in");
wolfSSL 12:1a06964c2adb 335 /* -1 is consistent failure even for FILE type */
wolfSSL 12:1a06964c2adb 336 return WOLFSSL_BIO_ERROR;
wolfSSL 12:1a06964c2adb 337 }
wolfSSL 12:1a06964c2adb 338
wolfSSL 12:1a06964c2adb 339 switch (bio->type) {
wolfSSL 12:1a06964c2adb 340 #ifndef NO_FILESYSTEM
wolfSSL 12:1a06964c2adb 341 case BIO_FILE:
wolfSSL 12:1a06964c2adb 342 XREWIND(bio->file);
wolfSSL 12:1a06964c2adb 343 return 0;
wolfSSL 12:1a06964c2adb 344 #endif
wolfSSL 12:1a06964c2adb 345
wolfSSL 12:1a06964c2adb 346 case BIO_BIO:
wolfSSL 12:1a06964c2adb 347 bio->rdIdx = 0;
wolfSSL 12:1a06964c2adb 348 bio->wrIdx = 0;
wolfSSL 12:1a06964c2adb 349 return 0;
wolfSSL 12:1a06964c2adb 350
wolfSSL 12:1a06964c2adb 351 default:
wolfSSL 12:1a06964c2adb 352 WOLFSSL_MSG("Unknown BIO type needs added to reset function");
wolfSSL 12:1a06964c2adb 353 }
wolfSSL 12:1a06964c2adb 354
wolfSSL 12:1a06964c2adb 355 return WOLFSSL_BIO_ERROR;
wolfSSL 12:1a06964c2adb 356 }
wolfSSL 12:1a06964c2adb 357
wolfSSL 12:1a06964c2adb 358 #ifndef NO_FILESYSTEM
wolfSSL 12:1a06964c2adb 359 long wolfSSL_BIO_set_fp(WOLFSSL_BIO *bio, XFILE fp, int c)
wolfSSL 12:1a06964c2adb 360 {
wolfSSL 12:1a06964c2adb 361 WOLFSSL_ENTER("wolfSSL_BIO_set_fp");
wolfSSL 12:1a06964c2adb 362
wolfSSL 12:1a06964c2adb 363 if (bio == NULL || fp == NULL) {
wolfSSL 12:1a06964c2adb 364 WOLFSSL_LEAVE("wolfSSL_BIO_set_fp", BAD_FUNC_ARG);
wolfSSL 12:1a06964c2adb 365 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 366 }
wolfSSL 12:1a06964c2adb 367
wolfSSL 12:1a06964c2adb 368 if (bio->type != BIO_FILE) {
wolfSSL 12:1a06964c2adb 369 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 370 }
wolfSSL 12:1a06964c2adb 371
wolfSSL 12:1a06964c2adb 372 bio->close = (byte)c;
wolfSSL 12:1a06964c2adb 373 bio->file = fp;
wolfSSL 12:1a06964c2adb 374
wolfSSL 12:1a06964c2adb 375 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 376 }
wolfSSL 12:1a06964c2adb 377
wolfSSL 12:1a06964c2adb 378
wolfSSL 12:1a06964c2adb 379 long wolfSSL_BIO_get_fp(WOLFSSL_BIO *bio, XFILE* fp)
wolfSSL 12:1a06964c2adb 380 {
wolfSSL 12:1a06964c2adb 381 WOLFSSL_ENTER("wolfSSL_BIO_get_fp");
wolfSSL 12:1a06964c2adb 382
wolfSSL 12:1a06964c2adb 383 if (bio == NULL || fp == NULL) {
wolfSSL 12:1a06964c2adb 384 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 385 }
wolfSSL 12:1a06964c2adb 386
wolfSSL 12:1a06964c2adb 387 if (bio->type != BIO_FILE) {
wolfSSL 12:1a06964c2adb 388 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 389 }
wolfSSL 12:1a06964c2adb 390
wolfSSL 12:1a06964c2adb 391 *fp = bio->file;
wolfSSL 12:1a06964c2adb 392
wolfSSL 12:1a06964c2adb 393 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 394 }
wolfSSL 12:1a06964c2adb 395
wolfSSL 12:1a06964c2adb 396 /* overwrites file */
wolfSSL 12:1a06964c2adb 397 int wolfSSL_BIO_write_filename(WOLFSSL_BIO *bio, char *name)
wolfSSL 12:1a06964c2adb 398 {
wolfSSL 12:1a06964c2adb 399 WOLFSSL_ENTER("wolfSSL_BIO_write_filename");
wolfSSL 12:1a06964c2adb 400
wolfSSL 12:1a06964c2adb 401 if (bio == NULL || name == NULL) {
wolfSSL 12:1a06964c2adb 402 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 403 }
wolfSSL 12:1a06964c2adb 404
wolfSSL 12:1a06964c2adb 405 if (bio->type == BIO_FILE) {
wolfSSL 12:1a06964c2adb 406 if (bio->file != NULL && bio->close == BIO_CLOSE) {
wolfSSL 12:1a06964c2adb 407 XFCLOSE(bio->file);
wolfSSL 12:1a06964c2adb 408 }
wolfSSL 12:1a06964c2adb 409
wolfSSL 12:1a06964c2adb 410 bio->file = XFOPEN(name, "w");
wolfSSL 12:1a06964c2adb 411 if (bio->file == NULL) {
wolfSSL 12:1a06964c2adb 412 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 413 }
wolfSSL 12:1a06964c2adb 414 bio->close = BIO_CLOSE;
wolfSSL 12:1a06964c2adb 415
wolfSSL 12:1a06964c2adb 416 return SSL_SUCCESS;
wolfSSL 12:1a06964c2adb 417 }
wolfSSL 12:1a06964c2adb 418
wolfSSL 12:1a06964c2adb 419 return SSL_FAILURE;
wolfSSL 12:1a06964c2adb 420 }
wolfSSL 12:1a06964c2adb 421
wolfSSL 12:1a06964c2adb 422
wolfSSL 12:1a06964c2adb 423 int wolfSSL_BIO_seek(WOLFSSL_BIO *bio, int ofs)
wolfSSL 12:1a06964c2adb 424 {
wolfSSL 12:1a06964c2adb 425 WOLFSSL_ENTER("wolfSSL_BIO_seek");
wolfSSL 12:1a06964c2adb 426
wolfSSL 12:1a06964c2adb 427 if (bio == NULL) {
wolfSSL 12:1a06964c2adb 428 return -1;
wolfSSL 12:1a06964c2adb 429 }
wolfSSL 12:1a06964c2adb 430
wolfSSL 12:1a06964c2adb 431 /* offset ofs from begining of file */
wolfSSL 12:1a06964c2adb 432 if (bio->type == BIO_FILE && XFSEEK(bio->file, ofs, SEEK_SET) < 0) {
wolfSSL 12:1a06964c2adb 433 return -1;
wolfSSL 12:1a06964c2adb 434 }
wolfSSL 12:1a06964c2adb 435
wolfSSL 12:1a06964c2adb 436 return 0;
wolfSSL 12:1a06964c2adb 437 }
wolfSSL 12:1a06964c2adb 438 #endif /* NO_FILESYSTEM */
wolfSSL 12:1a06964c2adb 439
wolfSSL 12:1a06964c2adb 440
wolfSSL 12:1a06964c2adb 441 long wolfSSL_BIO_set_mem_eof_return(WOLFSSL_BIO *bio, int v)
wolfSSL 12:1a06964c2adb 442 {
wolfSSL 12:1a06964c2adb 443 WOLFSSL_ENTER("wolfSSL_BIO_set_mem_eof_return");
wolfSSL 12:1a06964c2adb 444
wolfSSL 12:1a06964c2adb 445 if (bio != NULL) {
wolfSSL 12:1a06964c2adb 446 bio->eof = v;
wolfSSL 12:1a06964c2adb 447 }
wolfSSL 12:1a06964c2adb 448
wolfSSL 12:1a06964c2adb 449 return 0;
wolfSSL 12:1a06964c2adb 450 }
wolfSSL 12:1a06964c2adb 451 #endif /* WOLFSSL_BIO_INCLUDED */
wolfSSL 12:1a06964c2adb 452
wolfSSL 12:1a06964c2adb 453