599 lines
14 KiB
C
599 lines
14 KiB
C
/* ssl/bio_ssl.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
|
*
|
|
* This library is free for commercial and non-commercial use as long as
|
|
* the following conditions are aheared to. The following conditions
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
|
* included with this distribution is covered by the same copyright terms
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
|
*
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
|
* the code are not to be removed.
|
|
* If this package is used in a product, Eric Young should be given attribution
|
|
* as the author of the parts of the library used.
|
|
* This can be in the form of a textual message at program startup or
|
|
* in documentation (online or textual) provided with the package.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* "This product includes cryptographic software written by
|
|
* Eric Young (eay@cryptsoft.com)"
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
|
* being used are not cryptographic related :-).
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
|
* the apps directory (application code) you must include an acknowledgement:
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* The licence and distribution terms for any publically available version or
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
|
* copied and put under another distribution licence
|
|
* [including the GNU Public Licence.]
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <openssl/crypto.h>
|
|
#include <openssl/bio.h>
|
|
#include <openssl/err.h>
|
|
#include <openssl/ssl.h>
|
|
|
|
static int ssl_write(BIO *h, const char *buf, int num);
|
|
static int ssl_read(BIO *h, char *buf, int size);
|
|
static int ssl_puts(BIO *h, const char *str);
|
|
static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
|
|
static int ssl_new(BIO *h);
|
|
static int ssl_free(BIO *data);
|
|
static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
|
|
typedef struct bio_ssl_st
|
|
{
|
|
SSL *ssl; /* The ssl handle :-) */
|
|
/* re-negotiate every time the total number of bytes is this size */
|
|
int num_renegotiates;
|
|
unsigned long renegotiate_count;
|
|
unsigned long byte_count;
|
|
unsigned long renegotiate_timeout;
|
|
unsigned long last_time;
|
|
} BIO_SSL;
|
|
|
|
static BIO_METHOD methods_sslp=
|
|
{
|
|
BIO_TYPE_SSL,"ssl",
|
|
ssl_write,
|
|
ssl_read,
|
|
ssl_puts,
|
|
NULL, /* ssl_gets, */
|
|
ssl_ctrl,
|
|
ssl_new,
|
|
ssl_free,
|
|
ssl_callback_ctrl,
|
|
};
|
|
|
|
BIO_METHOD *BIO_f_ssl(void)
|
|
{
|
|
return(&methods_sslp);
|
|
}
|
|
|
|
static int ssl_new(BIO *bi)
|
|
{
|
|
BIO_SSL *bs;
|
|
|
|
bs=(BIO_SSL *)OPENSSL_malloc(sizeof(BIO_SSL));
|
|
if (bs == NULL)
|
|
{
|
|
BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
|
|
return(0);
|
|
}
|
|
memset(bs,0,sizeof(BIO_SSL));
|
|
bi->init=0;
|
|
bi->ptr=(char *)bs;
|
|
bi->flags=0;
|
|
return(1);
|
|
}
|
|
|
|
static int ssl_free(BIO *a)
|
|
{
|
|
BIO_SSL *bs;
|
|
|
|
if (a == NULL) return(0);
|
|
bs=(BIO_SSL *)a->ptr;
|
|
if (bs->ssl != NULL) SSL_shutdown(bs->ssl);
|
|
if (a->shutdown)
|
|
{
|
|
if (a->init && (bs->ssl != NULL))
|
|
SSL_free(bs->ssl);
|
|
a->init=0;
|
|
a->flags=0;
|
|
}
|
|
if (a->ptr != NULL)
|
|
OPENSSL_free(a->ptr);
|
|
return(1);
|
|
}
|
|
|
|
static int ssl_read(BIO *b, char *out, int outl)
|
|
{
|
|
int ret=1;
|
|
BIO_SSL *sb;
|
|
SSL *ssl;
|
|
int retry_reason=0;
|
|
int r=0;
|
|
|
|
if (out == NULL) return(0);
|
|
sb=(BIO_SSL *)b->ptr;
|
|
ssl=sb->ssl;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
#if 0
|
|
if (!SSL_is_init_finished(ssl))
|
|
{
|
|
/* ret=SSL_do_handshake(ssl); */
|
|
if (ret > 0)
|
|
{
|
|
|
|
outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
|
|
ret= -1;
|
|
goto end;
|
|
}
|
|
}
|
|
#endif
|
|
/* if (ret > 0) */
|
|
ret=SSL_read(ssl,out,outl);
|
|
|
|
switch (SSL_get_error(ssl,ret))
|
|
{
|
|
case SSL_ERROR_NONE:
|
|
if (ret <= 0) break;
|
|
if (sb->renegotiate_count > 0)
|
|
{
|
|
sb->byte_count+=ret;
|
|
if (sb->byte_count > sb->renegotiate_count)
|
|
{
|
|
sb->byte_count=0;
|
|
sb->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
r=1;
|
|
}
|
|
}
|
|
if ((sb->renegotiate_timeout > 0) && (!r))
|
|
{
|
|
unsigned long tm;
|
|
|
|
tm=(unsigned long)time(NULL);
|
|
if (tm > sb->last_time+sb->renegotiate_timeout)
|
|
{
|
|
sb->last_time=tm;
|
|
sb->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
}
|
|
}
|
|
|
|
break;
|
|
case SSL_ERROR_WANT_READ:
|
|
BIO_set_retry_read(b);
|
|
break;
|
|
case SSL_ERROR_WANT_WRITE:
|
|
BIO_set_retry_write(b);
|
|
break;
|
|
case SSL_ERROR_WANT_X509_LOOKUP:
|
|
BIO_set_retry_special(b);
|
|
retry_reason=BIO_RR_SSL_X509_LOOKUP;
|
|
break;
|
|
case SSL_ERROR_WANT_ACCEPT:
|
|
BIO_set_retry_special(b);
|
|
retry_reason=BIO_RR_ACCEPT;
|
|
break;
|
|
case SSL_ERROR_WANT_CONNECT:
|
|
BIO_set_retry_special(b);
|
|
retry_reason=BIO_RR_CONNECT;
|
|
break;
|
|
case SSL_ERROR_SYSCALL:
|
|
case SSL_ERROR_SSL:
|
|
case SSL_ERROR_ZERO_RETURN:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
b->retry_reason=retry_reason;
|
|
return(ret);
|
|
}
|
|
|
|
static int ssl_write(BIO *b, const char *out, int outl)
|
|
{
|
|
int ret,r=0;
|
|
int retry_reason=0;
|
|
SSL *ssl;
|
|
BIO_SSL *bs;
|
|
|
|
if (out == NULL) return(0);
|
|
bs=(BIO_SSL *)b->ptr;
|
|
ssl=bs->ssl;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
/* ret=SSL_do_handshake(ssl);
|
|
if (ret > 0) */
|
|
ret=SSL_write(ssl,out,outl);
|
|
|
|
switch (SSL_get_error(ssl,ret))
|
|
{
|
|
case SSL_ERROR_NONE:
|
|
if (ret <= 0) break;
|
|
if (bs->renegotiate_count > 0)
|
|
{
|
|
bs->byte_count+=ret;
|
|
if (bs->byte_count > bs->renegotiate_count)
|
|
{
|
|
bs->byte_count=0;
|
|
bs->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
r=1;
|
|
}
|
|
}
|
|
if ((bs->renegotiate_timeout > 0) && (!r))
|
|
{
|
|
unsigned long tm;
|
|
|
|
tm=(unsigned long)time(NULL);
|
|
if (tm > bs->last_time+bs->renegotiate_timeout)
|
|
{
|
|
bs->last_time=tm;
|
|
bs->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
}
|
|
}
|
|
break;
|
|
case SSL_ERROR_WANT_WRITE:
|
|
BIO_set_retry_write(b);
|
|
break;
|
|
case SSL_ERROR_WANT_READ:
|
|
BIO_set_retry_read(b);
|
|
break;
|
|
case SSL_ERROR_WANT_X509_LOOKUP:
|
|
BIO_set_retry_special(b);
|
|
retry_reason=BIO_RR_SSL_X509_LOOKUP;
|
|
break;
|
|
case SSL_ERROR_WANT_CONNECT:
|
|
BIO_set_retry_special(b);
|
|
retry_reason=BIO_RR_CONNECT;
|
|
case SSL_ERROR_SYSCALL:
|
|
case SSL_ERROR_SSL:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
b->retry_reason=retry_reason;
|
|
return(ret);
|
|
}
|
|
|
|
static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
|
|
{
|
|
SSL **sslp,*ssl;
|
|
BIO_SSL *bs;
|
|
BIO *dbio,*bio;
|
|
long ret=1;
|
|
|
|
bs=(BIO_SSL *)b->ptr;
|
|
ssl=bs->ssl;
|
|
if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
|
|
return(0);
|
|
switch (cmd)
|
|
{
|
|
case BIO_CTRL_RESET:
|
|
SSL_shutdown(ssl);
|
|
|
|
if (ssl->handshake_func == ssl->method->ssl_connect)
|
|
SSL_set_connect_state(ssl);
|
|
else if (ssl->handshake_func == ssl->method->ssl_accept)
|
|
SSL_set_accept_state(ssl);
|
|
|
|
SSL_clear(ssl);
|
|
|
|
if (b->next_bio != NULL)
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
else if (ssl->rbio != NULL)
|
|
ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
|
|
else
|
|
ret=1;
|
|
break;
|
|
case BIO_CTRL_INFO:
|
|
ret=0;
|
|
break;
|
|
case BIO_C_SSL_MODE:
|
|
if (num) /* client mode */
|
|
SSL_set_connect_state(ssl);
|
|
else
|
|
SSL_set_accept_state(ssl);
|
|
break;
|
|
case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
|
|
ret=bs->renegotiate_timeout;
|
|
if (num < 60) num=5;
|
|
bs->renegotiate_timeout=(unsigned long)num;
|
|
bs->last_time=(unsigned long)time(NULL);
|
|
break;
|
|
case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
|
|
ret=bs->renegotiate_count;
|
|
if ((long)num >=512)
|
|
bs->renegotiate_count=(unsigned long)num;
|
|
break;
|
|
case BIO_C_GET_SSL_NUM_RENEGOTIATES:
|
|
ret=bs->num_renegotiates;
|
|
break;
|
|
case BIO_C_SET_SSL:
|
|
if (ssl != NULL)
|
|
ssl_free(b);
|
|
b->shutdown=(int)num;
|
|
ssl=(SSL *)ptr;
|
|
((BIO_SSL *)b->ptr)->ssl=ssl;
|
|
bio=SSL_get_rbio(ssl);
|
|
if (bio != NULL)
|
|
{
|
|
if (b->next_bio != NULL)
|
|
BIO_push(bio,b->next_bio);
|
|
b->next_bio=bio;
|
|
CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);
|
|
}
|
|
b->init=1;
|
|
break;
|
|
case BIO_C_GET_SSL:
|
|
if (ptr != NULL)
|
|
{
|
|
sslp=(SSL **)ptr;
|
|
*sslp=ssl;
|
|
}
|
|
else
|
|
ret=0;
|
|
break;
|
|
case BIO_CTRL_GET_CLOSE:
|
|
ret=b->shutdown;
|
|
break;
|
|
case BIO_CTRL_SET_CLOSE:
|
|
b->shutdown=(int)num;
|
|
break;
|
|
case BIO_CTRL_WPENDING:
|
|
ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
|
|
break;
|
|
case BIO_CTRL_PENDING:
|
|
ret=SSL_pending(ssl);
|
|
if (ret == 0)
|
|
ret=BIO_pending(ssl->rbio);
|
|
break;
|
|
case BIO_CTRL_FLUSH:
|
|
BIO_clear_retry_flags(b);
|
|
ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
|
|
BIO_copy_next_retry(b);
|
|
break;
|
|
case BIO_CTRL_PUSH:
|
|
if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))
|
|
{
|
|
SSL_set_bio(ssl,b->next_bio,b->next_bio);
|
|
CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
|
|
}
|
|
break;
|
|
case BIO_CTRL_POP:
|
|
/* ugly bit of a hack */
|
|
if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
|
|
{
|
|
BIO_free_all(ssl->wbio);
|
|
}
|
|
if (b->next_bio != NULL)
|
|
{
|
|
CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
|
|
}
|
|
ssl->wbio=NULL;
|
|
ssl->rbio=NULL;
|
|
break;
|
|
case BIO_C_DO_STATE_MACHINE:
|
|
BIO_clear_retry_flags(b);
|
|
|
|
b->retry_reason=0;
|
|
ret=(int)SSL_do_handshake(ssl);
|
|
|
|
switch (SSL_get_error(ssl,(int)ret))
|
|
{
|
|
case SSL_ERROR_WANT_READ:
|
|
BIO_set_flags(b,
|
|
BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
|
|
break;
|
|
case SSL_ERROR_WANT_WRITE:
|
|
BIO_set_flags(b,
|
|
BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
|
|
break;
|
|
case SSL_ERROR_WANT_CONNECT:
|
|
BIO_set_flags(b,
|
|
BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);
|
|
b->retry_reason=b->next_bio->retry_reason;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case BIO_CTRL_DUP:
|
|
dbio=(BIO *)ptr;
|
|
if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
|
|
SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
|
|
((BIO_SSL *)dbio->ptr)->ssl=SSL_dup(ssl);
|
|
((BIO_SSL *)dbio->ptr)->renegotiate_count=
|
|
((BIO_SSL *)b->ptr)->renegotiate_count;
|
|
((BIO_SSL *)dbio->ptr)->byte_count=
|
|
((BIO_SSL *)b->ptr)->byte_count;
|
|
((BIO_SSL *)dbio->ptr)->renegotiate_timeout=
|
|
((BIO_SSL *)b->ptr)->renegotiate_timeout;
|
|
((BIO_SSL *)dbio->ptr)->last_time=
|
|
((BIO_SSL *)b->ptr)->last_time;
|
|
ret=(((BIO_SSL *)dbio->ptr)->ssl != NULL);
|
|
break;
|
|
case BIO_C_GET_FD:
|
|
ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
|
|
break;
|
|
case BIO_CTRL_SET_CALLBACK:
|
|
{
|
|
#if 0 /* FIXME: Should this be used? -- Richard Levitte */
|
|
SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
ret = -1;
|
|
#else
|
|
ret=0;
|
|
#endif
|
|
}
|
|
break;
|
|
case BIO_CTRL_GET_CALLBACK:
|
|
{
|
|
void (**fptr)(const SSL *xssl,int type,int val);
|
|
|
|
fptr=(void (**)(const SSL *xssl,int type,int val))ptr;
|
|
*fptr=SSL_get_info_callback(ssl);
|
|
}
|
|
break;
|
|
default:
|
|
ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
|
|
break;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
|
|
{
|
|
SSL *ssl;
|
|
BIO_SSL *bs;
|
|
long ret=1;
|
|
|
|
bs=(BIO_SSL *)b->ptr;
|
|
ssl=bs->ssl;
|
|
switch (cmd)
|
|
{
|
|
case BIO_CTRL_SET_CALLBACK:
|
|
{
|
|
/* FIXME: setting this via a completely different prototype
|
|
seems like a crap idea */
|
|
SSL_set_info_callback(ssl,(void (*)(const SSL *,int,int))fp);
|
|
}
|
|
break;
|
|
default:
|
|
ret=BIO_callback_ctrl(ssl->rbio,cmd,fp);
|
|
break;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
static int ssl_puts(BIO *bp, const char *str)
|
|
{
|
|
int n,ret;
|
|
|
|
n=strlen(str);
|
|
ret=BIO_write(bp,str,n);
|
|
return(ret);
|
|
}
|
|
|
|
BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
|
|
{
|
|
#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)
|
|
{
|
|
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);
|
|
if (ret != NULL) BIO_free(ret);
|
|
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;
|
|
}
|
|
}
|