diff options
Diffstat (limited to 'openssl/ssl/bio_ssl.c')
| -rw-r--r-- | openssl/ssl/bio_ssl.c | 603 |
1 files changed, 603 insertions, 0 deletions
diff --git a/openssl/ssl/bio_ssl.c b/openssl/ssl/bio_ssl.c new file mode 100644 index 00000000..eedac8a3 --- /dev/null +++ b/openssl/ssl/bio_ssl.c @@ -0,0 +1,603 @@ +/* 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); + if (!ssl_new(b)) + return 0; + } + 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: + /* Only detach if we are the BIO explicitly being popped */ + if (b == ptr) + { + /* Shouldn't happen in practice because the + * rbio and wbio are the same when pushed. + */ + if (ssl->rbio != ssl->wbio) + 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); + 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; + } + } |