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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 <errno.h>
#include <stddef.h>
#include <limits.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/thread.h>
/* BIO_set initialises a BIO structure to have the given type and sets the
* reference count to one. It returns one on success or zero on error. */
static int bio_set(BIO *bio, const BIO_METHOD *method) {
/* This function can be called with a stack allocated |BIO| so we have to
* assume that the contents of |BIO| are arbitary. This also means that it'll
* leak memory if you call |BIO_set| twice on the same BIO. */
memset(bio, 0, sizeof(BIO));
bio->method = method;
bio->shutdown = 1;
bio->references = 1;
if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data)) {
return 0;
}
if (method->create != NULL) {
if (!method->create(bio)) {
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
return 0;
}
}
return 1;
}
BIO *BIO_new(const BIO_METHOD *method) {
BIO *ret = OPENSSL_malloc(sizeof(BIO));
if (ret == NULL) {
OPENSSL_PUT_ERROR(BIO, BIO_new, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (!bio_set(ret, method)) {
OPENSSL_free(ret);
ret = NULL;
}
return ret;
}
int BIO_free(BIO *bio) {
BIO *next_bio;
for (; bio != NULL; bio = next_bio) {
int refs = CRYPTO_add(&bio->references, -1, CRYPTO_LOCK_BIO);
if (refs > 0) {
return 0;
}
if (bio->callback != NULL) {
int i = (int)bio->callback(bio, BIO_CB_FREE, NULL, 0, 0, 1);
if (i <= 0) {
return i;
}
}
next_bio = BIO_pop(bio);
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
if (bio->method != NULL && bio->method->destroy != NULL) {
bio->method->destroy(bio);
}
OPENSSL_free(bio);
}
return 1;
}
void BIO_vfree(BIO *bio) {
BIO_free(bio);
}
void BIO_free_all(BIO *bio) {
BIO_free(bio);
}
static int bio_io(BIO *bio, void *buf, int len, size_t method_offset,
int callback_flags, size_t *num) {
int i;
typedef int (*io_func_t)(BIO *, char *, int);
io_func_t io_func = NULL;
if (bio != NULL && bio->method != NULL) {
io_func =
*((const io_func_t *)(((const uint8_t *)bio->method) + method_offset));
}
if (io_func == NULL) {
OPENSSL_PUT_ERROR(BIO, bio_io, BIO_R_UNSUPPORTED_METHOD);
return -2;
}
if (bio->callback != NULL) {
i = (int) bio->callback(bio, callback_flags, buf, len, 0L, 1L);
if (i <= 0) {
return i;
}
}
if (!bio->init) {
OPENSSL_PUT_ERROR(BIO, bio_io, BIO_R_UNINITIALIZED);
return -2;
}
i = 0;
if (buf != NULL && len > 0) {
i = io_func(bio, buf, len);
}
if (i > 0) {
*num += i;
}
if (bio->callback != NULL) {
i = (int)(bio->callback(bio, callback_flags | BIO_CB_RETURN, buf, len, 0L,
(long)i));
}
return i;
}
int BIO_read(BIO *bio, void *buf, int len) {
return bio_io(bio, buf, len, offsetof(BIO_METHOD, bread), BIO_CB_READ,
&bio->num_read);
}
int BIO_gets(BIO *bio, char *buf, int len) {
return bio_io(bio, buf, len, offsetof(BIO_METHOD, bgets), BIO_CB_GETS,
&bio->num_read);
}
int BIO_write(BIO *bio, const void *in, int inl) {
return bio_io(bio, (char *)in, inl, offsetof(BIO_METHOD, bwrite),
BIO_CB_WRITE, &bio->num_write);
}
int BIO_puts(BIO *bio, const char *in) {
return BIO_write(bio, in, strlen(in));
}
int BIO_flush(BIO *bio) {
return BIO_ctrl(bio, BIO_CTRL_FLUSH, 0, NULL);
}
long BIO_ctrl(BIO *bio, int cmd, long larg, void *parg) {
long ret;
if (bio == NULL) {
return 0;
}
if (bio->method == NULL || bio->method->ctrl == NULL) {
OPENSSL_PUT_ERROR(BIO, BIO_ctrl, BIO_R_UNSUPPORTED_METHOD);
return -2;
}
if (bio->callback != NULL) {
ret = bio->callback(bio, BIO_CB_CTRL, parg, cmd, larg, 1);
if (ret <= 0) {
return ret;
}
}
ret = bio->method->ctrl(bio, cmd, larg, parg);
if (bio->callback != NULL) {
ret = bio->callback(bio, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
}
return ret;
}
char *BIO_ptr_ctrl(BIO *b, int cmd, long larg) {
char *p = NULL;
if (BIO_ctrl(b, cmd, larg, (void *)&p) <= 0) {
return NULL;
}
return p;
}
long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg) {
int i = iarg;
return BIO_ctrl(b, cmd, larg, (void *)&i);
}
int BIO_reset(BIO *bio) {
return BIO_ctrl(bio, BIO_CTRL_RESET, 0, NULL);
}
void BIO_set_flags(BIO *bio, int flags) {
bio->flags |= flags;
}
int BIO_test_flags(const BIO *bio, int flags) {
return bio->flags & flags;
}
int BIO_should_read(const BIO *bio) {
return BIO_test_flags(bio, BIO_FLAGS_READ);
}
int BIO_should_write(const BIO *bio) {
return BIO_test_flags(bio, BIO_FLAGS_WRITE);
}
int BIO_should_retry(const BIO *bio) {
return BIO_test_flags(bio, BIO_FLAGS_SHOULD_RETRY);
}
int BIO_should_io_special(const BIO *bio) {
return BIO_test_flags(bio, BIO_FLAGS_IO_SPECIAL);
}
int BIO_get_retry_reason(const BIO *bio) { return bio->retry_reason; }
void BIO_clear_flags(BIO *bio, int flags) {
bio->flags &= ~flags;
}
void BIO_set_retry_read(BIO *bio) {
bio->flags |= BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY;
}
void BIO_set_retry_write(BIO *bio) {
bio->flags |= BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY;
}
static const int kRetryFlags = BIO_FLAGS_RWS | BIO_FLAGS_SHOULD_RETRY;
int BIO_get_retry_flags(BIO *bio) {
return bio->flags & kRetryFlags;
}
void BIO_clear_retry_flags(BIO *bio) {
bio->flags &= ~kRetryFlags;
bio->retry_reason = 0;
}
int BIO_method_type(const BIO *bio) { return bio->method->type; }
void BIO_copy_next_retry(BIO *bio) {
BIO_clear_retry_flags(bio);
BIO_set_flags(bio, BIO_get_retry_flags(bio->next_bio));
bio->retry_reason = bio->next_bio->retry_reason;
}
long BIO_callback_ctrl(BIO *bio, int cmd, bio_info_cb fp) {
long ret;
bio_info_cb cb;
if (bio == NULL) {
return 0;
}
if (bio->method == NULL || bio->method->callback_ctrl == NULL) {
OPENSSL_PUT_ERROR(BIO, BIO_callback_ctrl, BIO_R_UNSUPPORTED_METHOD);
return 0;
}
cb = bio->callback;
if (cb != NULL) {
ret = cb(bio, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L);
if (ret <= 0) {
return ret;
}
}
ret = bio->method->callback_ctrl(bio, cmd, fp);
if (cb != NULL) {
ret = cb(bio, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
}
return ret;
}
size_t BIO_pending(const BIO *bio) {
return BIO_ctrl((BIO *) bio, BIO_CTRL_PENDING, 0, NULL);
}
size_t BIO_wpending(const BIO *bio) {
return BIO_ctrl((BIO *) bio, BIO_CTRL_WPENDING, 0, NULL);
}
int BIO_set_close(BIO *bio, int close_flag) {
return BIO_ctrl(bio, BIO_CTRL_SET_CLOSE, close_flag, NULL);
}
void BIO_set_callback(BIO *bio, bio_info_cb callback_func) {
bio->callback = callback_func;
}
void BIO_set_callback_arg(BIO *bio, char *arg) {
bio->cb_arg = arg;
}
char *BIO_get_callback_arg(const BIO *bio) {
return bio->cb_arg;
}
OPENSSL_EXPORT size_t BIO_number_read(const BIO *bio) {
return bio->num_read;
}
OPENSSL_EXPORT size_t BIO_number_written(const BIO *bio) {
return bio->num_write;
}
BIO *BIO_push(BIO *bio, BIO *appended_bio) {
BIO *last_bio;
if (bio == NULL) {
return bio;
}
last_bio = bio;
while (last_bio->next_bio != NULL) {
last_bio = last_bio->next_bio;
}
last_bio->next_bio = appended_bio;
/* TODO(fork): this seems very suspect. If we got rid of BIO SSL, we could
* get rid of this. */
BIO_ctrl(bio, BIO_CTRL_PUSH, 0, bio);
return bio;
}
BIO *BIO_pop(BIO *bio) {
BIO *ret;
if (bio == NULL) {
return NULL;
}
ret = bio->next_bio;
BIO_ctrl(bio, BIO_CTRL_POP, 0, bio);
bio->next_bio = NULL;
return ret;
}
BIO *BIO_next(BIO *bio) {
if (!bio) {
return NULL;
}
return bio->next_bio;
}
BIO *BIO_find_type(BIO *bio, int type) {
int method_type, mask;
if (!bio) {
return NULL;
}
mask = type & 0xff;
do {
if (bio->method != NULL) {
method_type = bio->method->type;
if (!mask) {
if (method_type & type) {
return bio;
}
} else if (method_type == type) {
return bio;
}
}
bio = bio->next_bio;
} while (bio != NULL);
return NULL;
}
int BIO_indent(BIO *bio, unsigned indent, unsigned max_indent) {
if (indent > max_indent) {
indent = max_indent;
}
while (indent--) {
if (BIO_puts(bio, " ") != 1) {
return 0;
}
}
return 1;
}
void BIO_print_errors_fp(FILE *out) {
BIO *bio = BIO_new_fp(out, BIO_NOCLOSE);
BIO_print_errors(bio);
BIO_free(bio);
}
static int print_bio(const char *str, size_t len, void *bio) {
return BIO_write((BIO *)bio, str, len);
}
void BIO_print_errors(BIO *bio) {
ERR_print_errors_cb(print_bio, bio);
}