ref: bae3ac29fc39bc36329abf1823004c0d79b2f6f0
dir: /sys/src/ape/lib/openssl/ssl/bio_ssl.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;
}
}