| /* 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(const 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; |
| /* BIO_FLAGS_MEM_RDONLY ensures |b->data| is not written to. */ |
| b->data = (void *)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) != ((size_t) 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); |
| } |