mirror of
https://github.com/openssl/openssl.git
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a9188d4e17
non-function pointers to function pointers and vice versa. The current solution is to have unions that describe the conversion we want to do, and gives us the ability to extract the type of data we want. The current solution is a quick fix, and can probably be made in a more general or elegant way.
567 lines
13 KiB
C
567 lines
13 KiB
C
/* ssl/bio_ssl.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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <openssl/crypto.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/ssl.h>
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static int ssl_write(BIO *h,char *buf,int num);
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static int ssl_read(BIO *h,char *buf,int size);
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static int ssl_puts(BIO *h,char *str);
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static long ssl_ctrl(BIO *h,int cmd,long arg1,char *arg2);
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static int ssl_new(BIO *h);
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static int ssl_free(BIO *data);
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typedef struct bio_ssl_st
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{
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SSL *ssl; /* The ssl handle :-) */
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/* re-negotiate every time the total number of bytes is this size */
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int num_renegotiates;
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unsigned long renegotiate_count;
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unsigned long byte_count;
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unsigned long renegotiate_timeout;
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unsigned long last_time;
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} BIO_SSL;
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static BIO_METHOD methods_sslp=
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{
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BIO_TYPE_SSL,"ssl",
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ssl_write,
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ssl_read,
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ssl_puts,
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NULL, /* ssl_gets, */
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ssl_ctrl,
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ssl_new,
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ssl_free,
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};
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union void_fn_to_char_u
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{
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char *char_p;
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void (*fn_p)();
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};
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BIO_METHOD *BIO_f_ssl(void)
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{
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return(&methods_sslp);
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}
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static int ssl_new(BIO *bi)
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{
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BIO_SSL *bs;
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bs=(BIO_SSL *)Malloc(sizeof(BIO_SSL));
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if (bs == NULL)
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{
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BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
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return(0);
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}
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memset(bs,0,sizeof(BIO_SSL));
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bi->init=0;
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bi->ptr=(char *)bs;
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bi->flags=0;
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return(1);
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}
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static int ssl_free(BIO *a)
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{
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BIO_SSL *bs;
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if (a == NULL) return(0);
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bs=(BIO_SSL *)a->ptr;
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if (bs->ssl != NULL) SSL_shutdown(bs->ssl);
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if (a->shutdown)
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{
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if (a->init && (bs->ssl != NULL))
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SSL_free(bs->ssl);
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a->init=0;
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a->flags=0;
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}
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if (a->ptr != NULL)
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Free(a->ptr);
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return(1);
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}
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static int ssl_read(BIO *b, char *out, int outl)
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{
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int ret=1;
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BIO_SSL *sb;
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SSL *ssl;
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int retry_reason=0;
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int r=0;
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if (out == NULL) return(0);
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sb=(BIO_SSL *)b->ptr;
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ssl=sb->ssl;
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BIO_clear_retry_flags(b);
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#if 0
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if (!SSL_is_init_finished(ssl))
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{
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/* ret=SSL_do_handshake(ssl); */
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if (ret > 0)
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{
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outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
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ret= -1;
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goto end;
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}
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}
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#endif
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/* if (ret > 0) */
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ret=SSL_read(ssl,out,outl);
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switch (SSL_get_error(ssl,ret))
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{
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case SSL_ERROR_NONE:
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if (ret <= 0) break;
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if (sb->renegotiate_count > 0)
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{
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sb->byte_count+=ret;
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if (sb->byte_count > sb->renegotiate_count)
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{
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sb->byte_count=0;
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sb->num_renegotiates++;
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SSL_renegotiate(ssl);
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r=1;
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}
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}
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if ((sb->renegotiate_timeout > 0) && (!r))
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{
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unsigned long tm;
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tm=(unsigned long)time(NULL);
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if (tm > sb->last_time+sb->renegotiate_timeout)
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{
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sb->last_time=tm;
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sb->num_renegotiates++;
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SSL_renegotiate(ssl);
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}
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}
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break;
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case SSL_ERROR_WANT_READ:
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BIO_set_retry_read(b);
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break;
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case SSL_ERROR_WANT_WRITE:
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BIO_set_retry_write(b);
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break;
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case SSL_ERROR_WANT_X509_LOOKUP:
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BIO_set_retry_special(b);
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retry_reason=BIO_RR_SSL_X509_LOOKUP;
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break;
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case SSL_ERROR_WANT_CONNECT:
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BIO_set_retry_special(b);
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retry_reason=BIO_RR_CONNECT;
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break;
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case SSL_ERROR_SYSCALL:
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case SSL_ERROR_SSL:
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case SSL_ERROR_ZERO_RETURN:
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default:
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break;
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}
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b->retry_reason=retry_reason;
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return(ret);
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}
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static int ssl_write(BIO *b, char *out, int outl)
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{
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int ret,r=0;
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int retry_reason=0;
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SSL *ssl;
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BIO_SSL *bs;
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if (out == NULL) return(0);
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bs=(BIO_SSL *)b->ptr;
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ssl=bs->ssl;
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BIO_clear_retry_flags(b);
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/* ret=SSL_do_handshake(ssl);
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if (ret > 0) */
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ret=SSL_write(ssl,out,outl);
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switch (SSL_get_error(ssl,ret))
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{
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case SSL_ERROR_NONE:
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if (ret <= 0) break;
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if (bs->renegotiate_count > 0)
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{
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bs->byte_count+=ret;
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if (bs->byte_count > bs->renegotiate_count)
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{
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bs->byte_count=0;
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bs->num_renegotiates++;
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SSL_renegotiate(ssl);
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r=1;
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}
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}
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if ((bs->renegotiate_timeout > 0) && (!r))
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{
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unsigned long tm;
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tm=(unsigned long)time(NULL);
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if (tm > bs->last_time+bs->renegotiate_timeout)
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{
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bs->last_time=tm;
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bs->num_renegotiates++;
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SSL_renegotiate(ssl);
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}
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}
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break;
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case SSL_ERROR_WANT_WRITE:
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BIO_set_retry_write(b);
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break;
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case SSL_ERROR_WANT_READ:
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BIO_set_retry_read(b);
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break;
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case SSL_ERROR_WANT_X509_LOOKUP:
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BIO_set_retry_special(b);
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retry_reason=BIO_RR_SSL_X509_LOOKUP;
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break;
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case SSL_ERROR_WANT_CONNECT:
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BIO_set_retry_special(b);
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retry_reason=BIO_RR_CONNECT;
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case SSL_ERROR_SYSCALL:
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case SSL_ERROR_SSL:
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default:
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break;
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}
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b->retry_reason=retry_reason;
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return(ret);
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}
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static long ssl_ctrl(BIO *b, int cmd, long num, char *ptr)
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{
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SSL **sslp,*ssl;
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BIO_SSL *bs;
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BIO *dbio,*bio;
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long ret=1;
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bs=(BIO_SSL *)b->ptr;
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ssl=bs->ssl;
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if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
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return(0);
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switch (cmd)
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{
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case BIO_CTRL_RESET:
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SSL_shutdown(ssl);
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if (ssl->handshake_func == ssl->method->ssl_connect)
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SSL_set_connect_state(ssl);
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else if (ssl->handshake_func == ssl->method->ssl_accept)
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SSL_set_accept_state(ssl);
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SSL_clear(ssl);
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if (b->next_bio != NULL)
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ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
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else if (ssl->rbio != NULL)
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ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
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else
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ret=1;
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break;
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case BIO_CTRL_INFO:
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ret=0;
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break;
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case BIO_C_SSL_MODE:
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if (num) /* client mode */
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SSL_set_connect_state(ssl);
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else
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SSL_set_accept_state(ssl);
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break;
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case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
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ret=bs->renegotiate_timeout;
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if (num < 60) num=5;
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bs->renegotiate_timeout=(unsigned long)num;
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bs->last_time=(unsigned long)time(NULL);
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break;
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case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
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ret=bs->renegotiate_count;
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if ((long)num >=512)
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bs->renegotiate_count=(unsigned long)num;
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break;
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case BIO_C_GET_SSL_NUM_RENEGOTIATES:
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ret=bs->num_renegotiates;
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break;
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case BIO_C_SET_SSL:
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if (ssl != NULL)
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ssl_free(b);
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b->shutdown=(int)num;
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ssl=(SSL *)ptr;
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((BIO_SSL *)b->ptr)->ssl=ssl;
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bio=SSL_get_rbio(ssl);
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if (bio != NULL)
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{
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if (b->next_bio != NULL)
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BIO_push(bio,b->next_bio);
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b->next_bio=bio;
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CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);
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}
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b->init=1;
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break;
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case BIO_C_GET_SSL:
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if (ptr != NULL)
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{
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sslp=(SSL **)ptr;
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*sslp=ssl;
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}
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else
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ret=0;
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break;
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case BIO_CTRL_GET_CLOSE:
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ret=b->shutdown;
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break;
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case BIO_CTRL_SET_CLOSE:
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b->shutdown=(int)num;
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break;
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case BIO_CTRL_WPENDING:
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ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
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break;
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case BIO_CTRL_PENDING:
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ret=SSL_pending(ssl);
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if (ret == 0)
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ret=BIO_pending(ssl->rbio);
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break;
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case BIO_CTRL_FLUSH:
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BIO_clear_retry_flags(b);
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ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
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BIO_copy_next_retry(b);
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break;
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case BIO_CTRL_PUSH:
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if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))
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{
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SSL_set_bio(ssl,b->next_bio,b->next_bio);
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CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
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}
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break;
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case BIO_CTRL_POP:
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/* ugly bit of a hack */
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if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
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{
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BIO_free_all(ssl->wbio);
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}
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ssl->wbio=NULL;
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ssl->rbio=NULL;
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break;
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case BIO_C_DO_STATE_MACHINE:
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BIO_clear_retry_flags(b);
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b->retry_reason=0;
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ret=(int)SSL_do_handshake(ssl);
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switch (SSL_get_error(ssl,(int)ret))
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{
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case SSL_ERROR_WANT_READ:
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BIO_set_flags(b,
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BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
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break;
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case SSL_ERROR_WANT_WRITE:
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BIO_set_flags(b,
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BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
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break;
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case SSL_ERROR_WANT_CONNECT:
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BIO_set_flags(b,
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BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);
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b->retry_reason=b->next_bio->retry_reason;
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break;
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default:
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break;
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}
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break;
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case BIO_CTRL_DUP:
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dbio=(BIO *)ptr;
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if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
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SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
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((BIO_SSL *)dbio->ptr)->ssl=SSL_dup(ssl);
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((BIO_SSL *)dbio->ptr)->renegotiate_count=
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((BIO_SSL *)b->ptr)->renegotiate_count;
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((BIO_SSL *)dbio->ptr)->byte_count=
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((BIO_SSL *)b->ptr)->byte_count;
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((BIO_SSL *)dbio->ptr)->renegotiate_timeout=
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((BIO_SSL *)b->ptr)->renegotiate_timeout;
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((BIO_SSL *)dbio->ptr)->last_time=
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((BIO_SSL *)b->ptr)->last_time;
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ret=(((BIO_SSL *)dbio->ptr)->ssl != NULL);
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break;
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case BIO_C_GET_FD:
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ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
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break;
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case BIO_CTRL_SET_CALLBACK:
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{
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union void_fn_to_char_u tmp_cb;
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tmp_cb.char_p = ptr;
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SSL_set_info_callback(ssl,tmp_cb.fn_p);
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}
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break;
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case BIO_CTRL_GET_CALLBACK:
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{
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void (**fptr)();
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fptr=(void (**)())ptr;
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*fptr=SSL_get_info_callback(ssl);
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}
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break;
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default:
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ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
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break;
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}
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return(ret);
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}
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static int ssl_puts(BIO *bp, char *str)
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{
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int n,ret;
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n=strlen(str);
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ret=BIO_write(bp,str,n);
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return(ret);
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}
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BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
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{
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BIO *ret=NULL,*buf=NULL,*ssl=NULL;
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if ((buf=BIO_new(BIO_f_buffer())) == NULL)
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return(NULL);
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if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)
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goto err;
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if ((ret=BIO_push(buf,ssl)) == NULL)
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goto err;
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return(ret);
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err:
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if (buf != NULL) BIO_free(buf);
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if (ssl != NULL) BIO_free(ssl);
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return(NULL);
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}
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BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
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{
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BIO *ret=NULL,*con=NULL,*ssl=NULL;
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if ((con=BIO_new(BIO_s_connect())) == NULL)
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return(NULL);
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if ((ssl=BIO_new_ssl(ctx,1)) == NULL)
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goto err;
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if ((ret=BIO_push(ssl,con)) == NULL)
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goto err;
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return(ret);
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err:
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if (con != NULL) BIO_free(con);
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if (ret != NULL) BIO_free(ret);
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return(NULL);
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}
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|
BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
|
|
{
|
|
BIO *ret;
|
|
SSL *ssl;
|
|
|
|
if ((ret=BIO_new(BIO_f_ssl())) == NULL)
|
|
return(NULL);
|
|
if ((ssl=SSL_new(ctx)) == NULL)
|
|
{
|
|
BIO_free(ret);
|
|
return(NULL);
|
|
}
|
|
if (client)
|
|
SSL_set_connect_state(ssl);
|
|
else
|
|
SSL_set_accept_state(ssl);
|
|
|
|
BIO_set_ssl(ret,ssl,BIO_CLOSE);
|
|
return(ret);
|
|
}
|
|
|
|
int BIO_ssl_copy_session_id(BIO *t, BIO *f)
|
|
{
|
|
t=BIO_find_type(t,BIO_TYPE_SSL);
|
|
f=BIO_find_type(f,BIO_TYPE_SSL);
|
|
if ((t == NULL) || (f == NULL))
|
|
return(0);
|
|
if ( (((BIO_SSL *)t->ptr)->ssl == NULL) ||
|
|
(((BIO_SSL *)f->ptr)->ssl == NULL))
|
|
return(0);
|
|
SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl,((BIO_SSL *)f->ptr)->ssl);
|
|
return(1);
|
|
}
|
|
|
|
void BIO_ssl_shutdown(BIO *b)
|
|
{
|
|
SSL *s;
|
|
|
|
while (b != NULL)
|
|
{
|
|
if (b->method->type == BIO_TYPE_SSL)
|
|
{
|
|
s=((BIO_SSL *)b->ptr)->ssl;
|
|
SSL_shutdown(s);
|
|
break;
|
|
}
|
|
b=b->next_bio;
|
|
}
|
|
}
|