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- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
- #include <openssl/bio.h>
-
- #include <limits.h>
- #include <string.h>
-
- #include <openssl/buf.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
-
-
- BIO *BIO_new_mem_buf(void *buf, int len) {
- BIO *ret;
- BUF_MEM *b;
- const size_t size = len < 0 ? strlen((char *)buf) : (size_t)len;
-
- if (!buf && len != 0) {
- OPENSSL_PUT_ERROR(BIO, BIO_R_NULL_PARAMETER);
- return NULL;
- }
-
- ret = BIO_new(BIO_s_mem());
- if (ret == NULL) {
- return NULL;
- }
-
- b = (BUF_MEM *)ret->ptr;
- b->data = buf;
- b->length = size;
- b->max = size;
-
- ret->flags |= BIO_FLAGS_MEM_RDONLY;
-
- /* |num| is used to store the value that this BIO will return when it runs
- * out of data. If it's negative then the retry flags will also be set. Since
- * this is static data, retrying wont help */
- ret->num = 0;
-
- return ret;
- }
-
- static int mem_new(BIO *bio) {
- BUF_MEM *b;
-
- b = BUF_MEM_new();
- if (b == NULL) {
- return 0;
- }
-
- /* |shutdown| is used to store the close flag: whether the BIO has ownership
- * of the BUF_MEM. */
- bio->shutdown = 1;
- bio->init = 1;
- bio->num = -1;
- bio->ptr = (char *)b;
-
- return 1;
- }
-
- static int mem_free(BIO *bio) {
- BUF_MEM *b;
-
- if (bio == NULL) {
- return 0;
- }
-
- if (!bio->shutdown || !bio->init || bio->ptr == NULL) {
- return 1;
- }
-
- b = (BUF_MEM *)bio->ptr;
- if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
- b->data = NULL;
- }
- BUF_MEM_free(b);
- bio->ptr = NULL;
- return 1;
- }
-
- static int mem_read(BIO *bio, char *out, int outl) {
- int ret;
- BUF_MEM *b = (BUF_MEM*) bio->ptr;
-
- BIO_clear_retry_flags(bio);
- ret = outl;
- if (b->length < INT_MAX && ret > (int)b->length) {
- ret = b->length;
- }
-
- if (ret > 0) {
- memcpy(out, b->data, ret);
- b->length -= ret;
- if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
- b->data += ret;
- } else {
- memmove(b->data, &b->data[ret], b->length);
- }
- } else if (b->length == 0) {
- ret = bio->num;
- if (ret != 0) {
- BIO_set_retry_read(bio);
- }
- }
- return ret;
- }
-
- static int mem_write(BIO *bio, const char *in, int inl) {
- int ret = -1;
- int blen;
- BUF_MEM *b;
-
- b = (BUF_MEM *)bio->ptr;
-
- if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
- OPENSSL_PUT_ERROR(BIO, BIO_R_WRITE_TO_READ_ONLY_BIO);
- goto err;
- }
-
- BIO_clear_retry_flags(bio);
- blen = b->length;
- if (INT_MAX - blen < inl) {
- goto err;
- }
- if (BUF_MEM_grow_clean(b, blen + inl) != (blen + inl)) {
- goto err;
- }
- memcpy(&b->data[blen], in, inl);
- ret = inl;
-
- err:
- return ret;
- }
-
- static int mem_puts(BIO *bp, const char *str) {
- return mem_write(bp, str, strlen(str));
- }
-
- static int mem_gets(BIO *bio, char *buf, int size) {
- int i, j;
- char *p;
- BUF_MEM *b = (BUF_MEM *)bio->ptr;
-
- BIO_clear_retry_flags(bio);
- j = b->length;
- if (size - 1 < j) {
- j = size - 1;
- }
- if (j <= 0) {
- if (size > 0) {
- *buf = 0;
- }
- return 0;
- }
-
- p = b->data;
- for (i = 0; i < j; i++) {
- if (p[i] == '\n') {
- i++;
- break;
- }
- }
-
- /* i is now the max num of bytes to copy, either j or up to and including the
- * first newline */
-
- i = mem_read(bio, buf, i);
- if (i > 0) {
- buf[i] = '\0';
- }
- return i;
- }
-
- static long mem_ctrl(BIO *bio, int cmd, long num, void *ptr) {
- long ret = 1;
- char **pptr;
-
- BUF_MEM *b = (BUF_MEM *)bio->ptr;
-
- switch (cmd) {
- case BIO_CTRL_RESET:
- if (b->data != NULL) {
- /* For read only case reset to the start again */
- if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
- b->data -= b->max - b->length;
- b->length = b->max;
- } else {
- memset(b->data, 0, b->max);
- b->length = 0;
- }
- }
- break;
- case BIO_CTRL_EOF:
- ret = (long)(b->length == 0);
- break;
- case BIO_C_SET_BUF_MEM_EOF_RETURN:
- bio->num = (int)num;
- break;
- case BIO_CTRL_INFO:
- ret = (long)b->length;
- if (ptr != NULL) {
- pptr = (char **)ptr;
- *pptr = (char *)&b->data[0];
- }
- break;
- case BIO_C_SET_BUF_MEM:
- mem_free(bio);
- bio->shutdown = (int)num;
- bio->ptr = ptr;
- break;
- case BIO_C_GET_BUF_MEM_PTR:
- if (ptr != NULL) {
- pptr = (char **)ptr;
- *pptr = (char *)b;
- }
- break;
- case BIO_CTRL_GET_CLOSE:
- ret = (long)bio->shutdown;
- break;
- case BIO_CTRL_SET_CLOSE:
- bio->shutdown = (int)num;
- break;
-
- case BIO_CTRL_WPENDING:
- ret = 0L;
- break;
- case BIO_CTRL_PENDING:
- ret = (long)b->length;
- break;
- case BIO_CTRL_FLUSH:
- ret = 1;
- break;
- default:
- ret = 0;
- break;
- }
- return ret;
- }
-
- static const BIO_METHOD mem_method = {
- BIO_TYPE_MEM, "memory buffer", mem_write, mem_read, mem_puts,
- mem_gets, mem_ctrl, mem_new, mem_free, NULL, };
-
- const BIO_METHOD *BIO_s_mem(void) { return &mem_method; }
-
- int BIO_mem_contents(const BIO *bio, const uint8_t **out_contents,
- size_t *out_len) {
- const BUF_MEM *b;
- if (bio->method != &mem_method) {
- return 0;
- }
-
- b = (BUF_MEM *)bio->ptr;
- *out_contents = (uint8_t *)b->data;
- *out_len = b->length;
- return 1;
- }
-
- long BIO_get_mem_data(BIO *bio, char **contents) {
- return BIO_ctrl(bio, BIO_CTRL_INFO, 0, (char *) contents);
- }
-
- int BIO_get_mem_ptr(BIO *bio, BUF_MEM **out) {
- return BIO_ctrl(bio, BIO_C_GET_BUF_MEM_PTR, 0, (char *) out);
- }
-
- int BIO_set_mem_buf(BIO *bio, BUF_MEM *b, int take_ownership) {
- return BIO_ctrl(bio, BIO_C_SET_BUF_MEM, take_ownership, (char *) b);
- }
-
- int BIO_set_mem_eof_return(BIO *bio, int eof_value) {
- return BIO_ctrl(bio, BIO_C_SET_BUF_MEM_EOF_RETURN, eof_value, NULL);
- }
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