575 lines
16 KiB
C
575 lines
16 KiB
C
/* 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 "ssl_locl.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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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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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 = OPENSSL_zalloc(sizeof(*bs));
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if (bs == NULL) {
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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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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)
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return (0);
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bs = (BIO_SSL *)a->ptr;
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if (bs->ssl != NULL)
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SSL_shutdown(bs->ssl);
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if (a->shutdown) {
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if (a->init)
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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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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)
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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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ret = SSL_read(ssl, out, outl);
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switch (SSL_get_error(ssl, ret)) {
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case SSL_ERROR_NONE:
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if (ret <= 0)
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break;
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if (sb->renegotiate_count > 0) {
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sb->byte_count += ret;
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if (sb->byte_count > sb->renegotiate_count) {
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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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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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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)
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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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/*
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* ret=SSL_do_handshake(ssl); if (ret > 0)
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*/
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ret = SSL_write(ssl, out, outl);
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switch (SSL_get_error(ssl, ret)) {
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case SSL_ERROR_NONE:
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if (ret <= 0)
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break;
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if (bs->renegotiate_count > 0) {
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bs->byte_count += ret;
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if (bs->byte_count > bs->renegotiate_count) {
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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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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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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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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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if (!SSL_clear(ssl)) {
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ret = 0;
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break;
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}
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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)
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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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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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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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BIO_up_ref(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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sslp = (SSL **)ptr;
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*sslp = ssl;
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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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SSL_set_bio(ssl, b->next_bio, b->next_bio);
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BIO_up_ref(b);
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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 rbio and wbio are the
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* 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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BIO_free(b->next_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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case SSL_ERROR_WANT_READ:
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BIO_set_flags(b, 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, 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, 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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case SSL_ERROR_WANT_X509_LOOKUP:
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BIO_set_retry_special(b);
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b->retry_reason = BIO_RR_SSL_X509_LOOKUP;
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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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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 = ((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 = ((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
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* 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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case BIO_CTRL_SET_CALLBACK:
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{
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/*
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* FIXME: setting this via a completely different prototype seems
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* like a crap idea
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*/
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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
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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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BIO_free(buf);
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BIO_free(ssl);
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#endif
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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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#ifndef OPENSSL_NO_SOCK
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|
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:
|
|
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);
|
|
if (!SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl))
|
|
return 0;
|
|
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;
|
|
}
|
|
}
|