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596 lines
15 KiB
596 lines
15 KiB
/* crypto/bio/bio_lib.c */ |
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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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|
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#include <stdio.h> |
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#include <errno.h> |
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#include <openssl/crypto.h> |
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#include "cryptlib.h" |
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#include <openssl/bio.h> |
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#include <openssl/stack.h> |
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|
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BIO *BIO_new(BIO_METHOD *method) |
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{ |
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BIO *ret = NULL; |
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ret = (BIO *)OPENSSL_malloc(sizeof(BIO)); |
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if (ret == NULL) { |
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BIOerr(BIO_F_BIO_NEW, 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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OPENSSL_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 BIO_set(BIO *bio, 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, &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 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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#ifdef REF_PRINT |
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REF_PRINT("BIO", a); |
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#endif |
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if (i > 0) |
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return (1); |
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#ifdef REF_CHECK |
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if (i < 0) { |
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fprintf(stderr, "BIO_free, bad reference count\n"); |
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abort(); |
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} |
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#endif |
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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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OPENSSL_free(a); |
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return (1); |
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} |
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void BIO_vfree(BIO *a) |
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{ |
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BIO_free(a); |
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} |
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void 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 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 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 (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *, |
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int, long, long) { |
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return b->callback; |
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} |
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void BIO_set_callback(BIO *b, |
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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 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 *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 *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 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 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) || (b->method == NULL) || (b->method->bread == NULL)) { |
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BIOerr(BIO_F_BIO_READ, 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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BIOerr(BIO_F_BIO_READ, 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, 0L, (long)i); |
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return (i); |
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} |
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int 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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cb = b->callback; |
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if ((b->method == NULL) || (b->method->bwrite == NULL)) { |
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BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD); |
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return (-2); |
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} |
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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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BIOerr(BIO_F_BIO_WRITE, 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, 0L, (long)i); |
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return (i); |
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} |
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int 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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BIOerr(BIO_F_BIO_PUTS, 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) && ((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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BIOerr(BIO_F_BIO_PUTS, 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 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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BIOerr(BIO_F_BIO_GETS, 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) && ((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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BIOerr(BIO_F_BIO_GETS, 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 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 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 *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 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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BIOerr(BIO_F_BIO_CTRL, 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 BIO_callback_ctrl(BIO *b, int cmd, |
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void (*fp) (struct bio_st *, int, const char *, int, |
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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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BIOerr(BIO_F_BIO_CALLBACK_CTRL, 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); |
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if (cb != NULL) |
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ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret); |
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return (ret); |
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} |
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|
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/* |
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* It is unfortunate to duplicate in functions what the BIO_(w)pending macros |
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* do; but those macros have inappropriate return type, and for interfacing |
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* from other programming languages, C macros aren't much of a help anyway. |
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*/ |
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size_t BIO_ctrl_pending(BIO *bio) |
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{ |
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return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL); |
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} |
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size_t BIO_ctrl_wpending(BIO *bio) |
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{ |
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return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL); |
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} |
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/* put the 'bio' on the end of b's list of operators */ |
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BIO *BIO_push(BIO *b, BIO *bio) |
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{ |
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BIO *lb; |
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if (b == NULL) |
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return (bio); |
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lb = b; |
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while (lb->next_bio != NULL) |
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lb = lb->next_bio; |
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lb->next_bio = bio; |
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if (bio != NULL) |
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bio->prev_bio = lb; |
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/* called to do internal processing */ |
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BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb); |
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return (b); |
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} |
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|
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/* Remove the first and return the rest */ |
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BIO *BIO_pop(BIO *b) |
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{ |
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BIO *ret; |
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|
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if (b == NULL) |
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return (NULL); |
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ret = b->next_bio; |
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BIO_ctrl(b, BIO_CTRL_POP, 0, b); |
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if (b->prev_bio != NULL) |
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b->prev_bio->next_bio = b->next_bio; |
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if (b->next_bio != NULL) |
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b->next_bio->prev_bio = b->prev_bio; |
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b->next_bio = NULL; |
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b->prev_bio = NULL; |
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return (ret); |
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} |
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BIO *BIO_get_retry_BIO(BIO *bio, int *reason) |
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{ |
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BIO *b, *last; |
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b = last = bio; |
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for (;;) { |
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if (!BIO_should_retry(b)) |
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break; |
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last = b; |
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b = b->next_bio; |
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if (b == NULL) |
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break; |
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} |
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if (reason != NULL) |
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*reason = last->retry_reason; |
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return (last); |
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} |
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int BIO_get_retry_reason(BIO *bio) |
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{ |
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return (bio->retry_reason); |
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} |
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BIO *BIO_find_type(BIO *bio, int type) |
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{ |
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int mt, mask; |
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|
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if (!bio) |
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return NULL; |
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mask = type & 0xff; |
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do { |
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if (bio->method != NULL) { |
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mt = bio->method->type; |
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|
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if (!mask) { |
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if (mt & type) |
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return (bio); |
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} else if (mt == type) |
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return (bio); |
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} |
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bio = bio->next_bio; |
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} while (bio != NULL); |
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return (NULL); |
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} |
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|
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BIO *BIO_next(BIO *b) |
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{ |
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if (!b) |
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return NULL; |
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return b->next_bio; |
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} |
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|
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void BIO_free_all(BIO *bio) |
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{ |
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BIO *b; |
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int ref; |
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|
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while (bio != NULL) { |
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b = bio; |
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ref = b->references; |
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bio = bio->next_bio; |
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BIO_free(b); |
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/* Since ref count > 1, don't free anyone else. */ |
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if (ref > 1) |
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break; |
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} |
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} |
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|
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BIO *BIO_dup_chain(BIO *in) |
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{ |
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BIO *ret = NULL, *eoc = NULL, *bio, *new_bio; |
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|
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for (bio = in; bio != NULL; bio = bio->next_bio) { |
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if ((new_bio = BIO_new(bio->method)) == NULL) |
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goto err; |
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new_bio->callback = bio->callback; |
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new_bio->cb_arg = bio->cb_arg; |
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new_bio->init = bio->init; |
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new_bio->shutdown = bio->shutdown; |
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new_bio->flags = bio->flags; |
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|
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/* This will let SSL_s_sock() work with stdin/stdout */ |
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new_bio->num = bio->num; |
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|
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if (!BIO_dup_state(bio, (char *)new_bio)) { |
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BIO_free(new_bio); |
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goto err; |
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} |
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|
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/* copy app data */ |
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if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data, |
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&bio->ex_data)) { |
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BIO_free(new_bio); |
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goto err; |
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} |
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|
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if (ret == NULL) { |
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eoc = new_bio; |
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ret = eoc; |
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} else { |
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BIO_push(eoc, new_bio); |
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eoc = new_bio; |
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} |
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} |
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return (ret); |
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err: |
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BIO_free_all(ret); |
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|
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return (NULL); |
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} |
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void BIO_copy_next_retry(BIO *b) |
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{ |
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BIO_set_flags(b, BIO_get_retry_flags(b->next_bio)); |
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b->retry_reason = b->next_bio->retry_reason; |
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} |
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int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
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CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
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{ |
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp, |
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new_func, dup_func, free_func); |
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} |
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int BIO_set_ex_data(BIO *bio, int idx, void *data) |
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{ |
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return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data)); |
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} |
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void *BIO_get_ex_data(BIO *bio, int idx) |
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{ |
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return (CRYPTO_get_ex_data(&(bio->ex_data), idx)); |
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} |
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|
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unsigned long BIO_number_read(BIO *bio) |
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{ |
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if (bio) |
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return bio->num_read; |
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return 0; |
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} |
|
|
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unsigned long BIO_number_written(BIO *bio) |
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{ |
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if (bio) |
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return bio->num_write; |
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return 0; |
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} |
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|
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IMPLEMENT_STACK_OF(BIO)
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|
|