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686 lines
14 KiB
C
686 lines
14 KiB
C
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/* $OpenBSD: bio_lib.c,v 1.29 2019/04/14 17:39:03 jsing Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <openssl/bio.h>
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#include <openssl/crypto.h>
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#include <openssl/err.h>
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#include <openssl/stack.h>
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int
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BIO_get_new_index(void)
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{
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static int bio_type_index = BIO_TYPE_START;
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int index;
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/* The index will collide with the BIO flag bits if it exceeds 255. */
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index = CRYPTO_add(&bio_type_index, 1, CRYPTO_LOCK_BIO);
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if (index > 255)
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return -1;
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return index;
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}
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BIO *
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BIO_new(const BIO_METHOD *method)
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{
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BIO *ret = NULL;
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ret = malloc(sizeof(BIO));
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if (ret == NULL) {
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BIOerror(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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if (!BIO_set(ret, method)) {
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free(ret);
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ret = NULL;
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}
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return (ret);
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}
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int
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BIO_set(BIO *bio, const BIO_METHOD *method)
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{
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bio->method = method;
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bio->callback = NULL;
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bio->cb_arg = NULL;
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bio->init = 0;
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bio->shutdown = 1;
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bio->flags = 0;
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bio->retry_reason = 0;
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bio->num = 0;
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bio->ptr = NULL;
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bio->prev_bio = NULL;
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bio->next_bio = NULL;
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bio->references = 1;
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bio->num_read = 0L;
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bio->num_write = 0L;
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
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if (method->create != NULL)
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if (!method->create(bio)) {
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
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&bio->ex_data);
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return (0);
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}
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return (1);
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}
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int
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BIO_free(BIO *a)
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{
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int i;
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if (a == NULL)
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return (0);
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i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO);
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if (i > 0)
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return (1);
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if ((a->callback != NULL) &&
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((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
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return (i);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
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if (a->method != NULL && a->method->destroy != NULL)
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a->method->destroy(a);
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free(a);
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return (1);
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}
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void
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BIO_vfree(BIO *a)
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{
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BIO_free(a);
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}
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int
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BIO_up_ref(BIO *bio)
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{
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int refs = CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
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return (refs > 1) ? 1 : 0;
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}
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void *
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BIO_get_data(BIO *a)
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{
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return (a->ptr);
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}
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void
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BIO_set_data(BIO *a, void *ptr)
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{
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a->ptr = ptr;
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}
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void
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BIO_set_init(BIO *a, int init)
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{
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a->init = init;
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}
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int
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BIO_get_shutdown(BIO *a)
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{
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return (a->shutdown);
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}
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void
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BIO_set_shutdown(BIO *a, int shut)
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{
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a->shutdown = shut;
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}
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void
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BIO_clear_flags(BIO *b, int flags)
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{
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b->flags &= ~flags;
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}
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int
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BIO_test_flags(const BIO *b, int flags)
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{
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return (b->flags & flags);
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}
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void
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BIO_set_flags(BIO *b, int flags)
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{
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b->flags |= flags;
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}
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long
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(*BIO_get_callback(const BIO *b))(struct bio_st *, int, const char *, int,
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long, long)
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{
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return b->callback;
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}
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void
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BIO_set_callback(BIO *b, long (*cb)(struct bio_st *, int, const char *, int,
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long, long))
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{
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b->callback = cb;
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}
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void
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BIO_set_callback_arg(BIO *b, char *arg)
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{
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b->cb_arg = arg;
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}
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char *
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BIO_get_callback_arg(const BIO *b)
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{
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return b->cb_arg;
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}
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const char *
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BIO_method_name(const BIO *b)
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{
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return b->method->name;
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}
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int
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BIO_method_type(const BIO *b)
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{
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return b->method->type;
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}
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int
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BIO_read(BIO *b, void *out, int outl)
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{
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int i;
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long (*cb)(BIO *, int, const char *, int, long, long);
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if (b == NULL)
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return (0);
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if (out == NULL || outl <= 0)
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return (0);
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if (b->method == NULL || b->method->bread == NULL) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
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return (-2);
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}
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cb = b->callback;
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if ((cb != NULL) &&
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((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
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return (i);
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if (!b->init) {
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BIOerror(BIO_R_UNINITIALIZED);
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return (-2);
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}
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i = b->method->bread(b, out, outl);
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if (i > 0)
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b->num_read += (unsigned long)i;
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if (cb != NULL)
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i = (int)cb(b, BIO_CB_READ|BIO_CB_RETURN, out, outl,
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0L, (long)i);
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return (i);
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}
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int
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BIO_write(BIO *b, const void *in, int inl)
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{
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int i;
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long (*cb)(BIO *, int, const char *, int, long, long);
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if (b == NULL)
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return (0);
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if (in == NULL || inl <= 0)
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return (0);
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if (b->method == NULL || b->method->bwrite == NULL) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
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return (-2);
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}
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cb = b->callback;
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if ((cb != NULL) &&
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((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
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return (i);
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if (!b->init) {
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BIOerror(BIO_R_UNINITIALIZED);
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return (-2);
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}
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i = b->method->bwrite(b, in, inl);
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if (i > 0)
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b->num_write += (unsigned long)i;
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if (cb != NULL)
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i = (int)cb(b, BIO_CB_WRITE|BIO_CB_RETURN, in, inl,
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0L, (long)i);
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return (i);
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}
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int
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BIO_puts(BIO *b, const char *in)
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{
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int i;
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long (*cb)(BIO *, int, const char *, int, long, long);
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if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
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return (-2);
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}
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cb = b->callback;
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if ((cb != NULL) &&
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((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
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return (i);
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if (!b->init) {
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BIOerror(BIO_R_UNINITIALIZED);
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return (-2);
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}
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i = b->method->bputs(b, in);
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if (i > 0)
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b->num_write += (unsigned long)i;
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if (cb != NULL)
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i = (int)cb(b, BIO_CB_PUTS|BIO_CB_RETURN, in, 0, 0L, (long)i);
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return (i);
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}
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int
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BIO_gets(BIO *b, char *in, int inl)
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{
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int i;
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long (*cb)(BIO *, int, const char *, int, long, long);
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if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
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return (-2);
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}
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cb = b->callback;
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if ((cb != NULL) &&
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((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
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return (i);
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if (!b->init) {
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BIOerror(BIO_R_UNINITIALIZED);
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return (-2);
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}
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i = b->method->bgets(b, in, inl);
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if (cb != NULL)
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i = (int)cb(b, BIO_CB_GETS|BIO_CB_RETURN, in, inl, 0L, (long)i);
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return (i);
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}
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int
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BIO_indent(BIO *b, int indent, int max)
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{
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if (indent < 0)
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indent = 0;
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if (indent > max)
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indent = max;
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while (indent--)
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if (BIO_puts(b, " ") != 1)
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return 0;
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return 1;
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}
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long
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BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
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{
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int i;
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i = iarg;
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return (BIO_ctrl(b, cmd, larg, (char *)&i));
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}
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char *
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BIO_ptr_ctrl(BIO *b, int cmd, long larg)
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{
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char *p = NULL;
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if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
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return (NULL);
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else
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return (p);
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}
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long
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BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
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{
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long ret;
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long (*cb)(BIO *, int, const char *, int, long, long);
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if (b == NULL)
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return (0);
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if ((b->method == NULL) || (b->method->ctrl == NULL)) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
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return (-2);
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}
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cb = b->callback;
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if ((cb != NULL) &&
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((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
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return (ret);
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ret = b->method->ctrl(b, cmd, larg, parg);
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if (cb != NULL)
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ret = cb(b, BIO_CB_CTRL|BIO_CB_RETURN, parg, cmd, larg, ret);
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return (ret);
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}
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long
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BIO_callback_ctrl(BIO *b, int cmd,
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void (*fp)(struct bio_st *, int, const char *, int, long, long))
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{
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long ret;
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long (*cb)(BIO *, int, const char *, int, long, long);
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if (b == NULL)
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return (0);
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if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
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return (-2);
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}
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cb = b->callback;
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if ((cb != NULL) &&
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((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
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return (ret);
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||
|
ret = b->method->callback_ctrl(b, cmd, fp);
|
||
|
|
||
|
if (cb != NULL)
|
||
|
ret = cb(b, BIO_CB_CTRL|BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
|
||
|
return (ret);
|
||
|
}
|
||
|
|
||
|
/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
|
||
|
* do; but those macros have inappropriate return type, and for interfacing
|
||
|
* from other programming languages, C macros aren't much of a help anyway. */
|
||
|
size_t
|
||
|
BIO_ctrl_pending(BIO *bio)
|
||
|
{
|
||
|
return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
|
||
|
}
|
||
|
|
||
|
size_t
|
||
|
BIO_ctrl_wpending(BIO *bio)
|
||
|
{
|
||
|
return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
|
||
|
}
|
||
|
|
||
|
|
||
|
/* put the 'bio' on the end of b's list of operators */
|
||
|
BIO *
|
||
|
BIO_push(BIO *b, BIO *bio)
|
||
|
{
|
||
|
BIO *lb;
|
||
|
|
||
|
if (b == NULL)
|
||
|
return (bio);
|
||
|
lb = b;
|
||
|
while (lb->next_bio != NULL)
|
||
|
lb = lb->next_bio;
|
||
|
lb->next_bio = bio;
|
||
|
if (bio != NULL)
|
||
|
bio->prev_bio = lb;
|
||
|
/* called to do internal processing */
|
||
|
BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
|
||
|
return (b);
|
||
|
}
|
||
|
|
||
|
/* Remove the first and return the rest */
|
||
|
BIO *
|
||
|
BIO_pop(BIO *b)
|
||
|
{
|
||
|
BIO *ret;
|
||
|
|
||
|
if (b == NULL)
|
||
|
return (NULL);
|
||
|
ret = b->next_bio;
|
||
|
|
||
|
BIO_ctrl(b, BIO_CTRL_POP, 0, b);
|
||
|
|
||
|
if (b->prev_bio != NULL)
|
||
|
b->prev_bio->next_bio = b->next_bio;
|
||
|
if (b->next_bio != NULL)
|
||
|
b->next_bio->prev_bio = b->prev_bio;
|
||
|
|
||
|
b->next_bio = NULL;
|
||
|
b->prev_bio = NULL;
|
||
|
return (ret);
|
||
|
}
|
||
|
|
||
|
BIO *
|
||
|
BIO_get_retry_BIO(BIO *bio, int *reason)
|
||
|
{
|
||
|
BIO *b, *last;
|
||
|
|
||
|
b = last = bio;
|
||
|
for (;;) {
|
||
|
if (!BIO_should_retry(b))
|
||
|
break;
|
||
|
last = b;
|
||
|
b = b->next_bio;
|
||
|
if (b == NULL)
|
||
|
break;
|
||
|
}
|
||
|
if (reason != NULL)
|
||
|
*reason = last->retry_reason;
|
||
|
return (last);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
BIO_get_retry_reason(BIO *bio)
|
||
|
{
|
||
|
return (bio->retry_reason);
|
||
|
}
|
||
|
|
||
|
BIO *
|
||
|
BIO_find_type(BIO *bio, int type)
|
||
|
{
|
||
|
int mt, mask;
|
||
|
|
||
|
if (!bio)
|
||
|
return NULL;
|
||
|
mask = type & 0xff;
|
||
|
do {
|
||
|
if (bio->method != NULL) {
|
||
|
mt = bio->method->type;
|
||
|
if (!mask) {
|
||
|
if (mt & type)
|
||
|
return (bio);
|
||
|
} else if (mt == type)
|
||
|
return (bio);
|
||
|
}
|
||
|
bio = bio->next_bio;
|
||
|
} while (bio != NULL);
|
||
|
return (NULL);
|
||
|
}
|
||
|
|
||
|
BIO *
|
||
|
BIO_next(BIO *b)
|
||
|
{
|
||
|
if (!b)
|
||
|
return NULL;
|
||
|
return b->next_bio;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
BIO_free_all(BIO *bio)
|
||
|
{
|
||
|
BIO *b;
|
||
|
int ref;
|
||
|
|
||
|
while (bio != NULL) {
|
||
|
b = bio;
|
||
|
ref = b->references;
|
||
|
bio = bio->next_bio;
|
||
|
BIO_free(b);
|
||
|
/* Since ref count > 1, don't free anyone else. */
|
||
|
if (ref > 1)
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
BIO *
|
||
|
BIO_dup_chain(BIO *in)
|
||
|
{
|
||
|
BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
|
||
|
|
||
|
for (bio = in; bio != NULL; bio = bio->next_bio) {
|
||
|
if ((new_bio = BIO_new(bio->method)) == NULL)
|
||
|
goto err;
|
||
|
new_bio->callback = bio->callback;
|
||
|
new_bio->cb_arg = bio->cb_arg;
|
||
|
new_bio->init = bio->init;
|
||
|
new_bio->shutdown = bio->shutdown;
|
||
|
new_bio->flags = bio->flags;
|
||
|
|
||
|
/* This will let SSL_s_sock() work with stdin/stdout */
|
||
|
new_bio->num = bio->num;
|
||
|
|
||
|
if (!BIO_dup_state(bio, (char *)new_bio)) {
|
||
|
BIO_free(new_bio);
|
||
|
goto err;
|
||
|
}
|
||
|
|
||
|
/* copy app data */
|
||
|
if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO,
|
||
|
&new_bio->ex_data, &bio->ex_data))
|
||
|
goto err;
|
||
|
|
||
|
if (ret == NULL) {
|
||
|
eoc = new_bio;
|
||
|
ret = eoc;
|
||
|
} else {
|
||
|
BIO_push(eoc, new_bio);
|
||
|
eoc = new_bio;
|
||
|
}
|
||
|
}
|
||
|
return (ret);
|
||
|
err:
|
||
|
BIO_free(ret);
|
||
|
return (NULL);
|
||
|
|
||
|
}
|
||
|
|
||
|
void
|
||
|
BIO_copy_next_retry(BIO *b)
|
||
|
{
|
||
|
BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
|
||
|
b->retry_reason = b->next_bio->retry_reason;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
|
||
|
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
|
||
|
{
|
||
|
return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
|
||
|
new_func, dup_func, free_func);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
BIO_set_ex_data(BIO *bio, int idx, void *data)
|
||
|
{
|
||
|
return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
|
||
|
}
|
||
|
|
||
|
void *
|
||
|
BIO_get_ex_data(BIO *bio, int idx)
|
||
|
{
|
||
|
return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
|
||
|
}
|
||
|
|
||
|
unsigned long
|
||
|
BIO_number_read(BIO *bio)
|
||
|
{
|
||
|
if (bio)
|
||
|
return bio->num_read;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
unsigned long
|
||
|
BIO_number_written(BIO *bio)
|
||
|
{
|
||
|
if (bio)
|
||
|
return bio->num_write;
|
||
|
return 0;
|
||
|
}
|