606 lines
14 KiB
C
606 lines
14 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, const 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, const char *str);
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static long ssl_ctrl(BIO *h, int cmd, long arg1, void *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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static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
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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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ssl_callback_ctrl,
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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 *)OPENSSL_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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OPENSSL_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_ACCEPT:
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BIO_set_retry_special(b);
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retry_reason=BIO_RR_ACCEPT;
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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, const 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, void *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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{
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ssl_free(b);
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if (!ssl_new(b))
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return 0;
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}
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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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/* Only detach if we are the BIO explicitly being popped */
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if (b == ptr)
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{
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/* Shouldn't happen in practice because the
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* rbio and wbio are the same when pushed.
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*/
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if (ssl->rbio != ssl->wbio)
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BIO_free_all(ssl->wbio);
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if (b->next_bio != NULL)
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CRYPTO_add(&b->next_bio->references,-1,CRYPTO_LOCK_BIO);
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ssl->wbio=NULL;
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ssl->rbio=NULL;
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}
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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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#if 0 /* FIXME: Should this be used? -- Richard Levitte */
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SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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ret = -1;
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#else
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ret=0;
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#endif
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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)(const SSL *xssl,int type,int val);
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fptr=(void (**)(const SSL *xssl,int type,int val))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 long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
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{
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SSL *ssl;
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BIO_SSL *bs;
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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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switch (cmd)
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{
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case BIO_CTRL_SET_CALLBACK:
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{
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/* FIXME: setting this via a completely different prototype
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seems like a crap idea */
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SSL_set_info_callback(ssl,(void (*)(const SSL *,int,int))fp);
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}
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break;
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default:
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ret=BIO_callback_ctrl(ssl->rbio,cmd,fp);
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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, const 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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#ifndef OPENSSL_NO_SOCK
|
|
BIO *ret=NULL,*buf=NULL,*ssl=NULL;
|
|
|
|
if ((buf=BIO_new(BIO_f_buffer())) == NULL)
|
|
return(NULL);
|
|
if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)
|
|
goto err;
|
|
if ((ret=BIO_push(buf,ssl)) == NULL)
|
|
goto err;
|
|
return(ret);
|
|
err:
|
|
if (buf != NULL) BIO_free(buf);
|
|
if (ssl != NULL) BIO_free(ssl);
|
|
#endif
|
|
return(NULL);
|
|
}
|
|
|
|
BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
|
|
{
|
|
#ifndef OPENSSL_NO_SOCK
|
|
BIO *ret=NULL,*con=NULL,*ssl=NULL;
|
|
|
|
if ((con=BIO_new(BIO_s_connect())) == NULL)
|
|
return(NULL);
|
|
if ((ssl=BIO_new_ssl(ctx,1)) == NULL)
|
|
goto err;
|
|
if ((ret=BIO_push(ssl,con)) == NULL)
|
|
goto err;
|
|
return(ret);
|
|
err:
|
|
if (con != NULL) BIO_free(con);
|
|
#endif
|
|
return(NULL);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|