diff options
Diffstat (limited to 'ssl/bio_ssl.c')
| -rw-r--r-- | ssl/bio_ssl.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/ssl/bio_ssl.c b/ssl/bio_ssl.c new file mode 100644 index 0000000000..6c0babaf30 --- /dev/null +++ b/ssl/bio_ssl.c @@ -0,0 +1,432 @@ +/* ssl/bio_ssl.c */ +/* Copyright (C) 1995-1997 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 <string.h> +#include <errno.h> +#include "bio.h" +#include "err.h" +#include "ssl.h" + +#ifndef NOPROTO +static int ssl_write(BIO *h,char *buf,int num); +static int ssl_read(BIO *h,char *buf,int size); +static int ssl_puts(BIO *h,char *str); +static long ssl_ctrl(BIO *h,int cmd,long arg1,char *arg2); +static int ssl_new(BIO *h); +static int ssl_free(BIO *data); +#else +static int ssl_write(); +static int ssl_read(); +static int ssl_puts(); +static long ssl_ctrl(); +static int ssl_new(); +static int ssl_free(); +#endif + +static BIO_METHOD methods_sslp= + { + BIO_TYPE_SSL,"ssl", + ssl_write, + ssl_read, + ssl_puts, + NULL, /* ssl_gets, */ + ssl_ctrl, + ssl_new, + ssl_free, + }; + +BIO_METHOD *BIO_f_ssl() + { + return(&methods_sslp); + } + +static int ssl_new(bi) +BIO *bi; + { + bi->init=0; + bi->ptr=NULL; /* The SSL structure */ + bi->flags=0; + return(1); + } + +static int ssl_free(a) +BIO *a; + { + if (a == NULL) return(0); + if (a->ptr != NULL) SSL_shutdown((SSL *)a->ptr); + if (a->shutdown) + { + if (a->init) SSL_free((SSL *)a->ptr); + a->init=0; + a->flags=0; + a->ptr=NULL; + } + return(1); + } + +static int ssl_read(b,out,outl) +BIO *b; +char *out; +int outl; + { + int ret=1; + int inflags,outflags; + SSL *ssl; + int retry_reason=0; + + if (out == NULL) return(0); + ssl=(SSL *)b->ptr; + + inflags=outflags=b->flags; + + outflags&= ~(BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY); + + if (!SSL_is_init_finished(ssl)) + { + ret=SSL_do_handshake(ssl); +#if 0 + 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; + break; + case SSL_ERROR_WANT_READ: + outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY); + break; + case SSL_ERROR_WANT_WRITE: + outflags=(BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY); + break; + case SSL_ERROR_WANT_X509_LOOKUP: + outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY); + retry_reason=BIO_RR_SSL_X509_LOOKUP; + break; + case SSL_ERROR_WANT_CONNECT: + outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY); + 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; + b->flags=outflags; + return(ret); + } + +static int ssl_write(b,out,outl) +BIO *b; +char *out; +int outl; + { + int ret; + int inflags,outflags,retry_reason=0; + SSL *ssl; + + if (out == NULL) return(0); + ssl=(SSL *)b->ptr; + + inflags=outflags=b->flags; + + outflags&= ~(BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY); + + 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; + break; + case SSL_ERROR_WANT_WRITE: + outflags=(BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY); + break; + case SSL_ERROR_WANT_READ: + outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY); + break; + case SSL_ERROR_WANT_X509_LOOKUP: + outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY); + retry_reason=BIO_RR_SSL_X509_LOOKUP; + break; + case SSL_ERROR_WANT_CONNECT: + outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY); + retry_reason=BIO_RR_CONNECT; + case SSL_ERROR_SYSCALL: + case SSL_ERROR_SSL: + default: + break; + } + + b->retry_reason=retry_reason; + b->flags=outflags; + return(ret); + } + +static long ssl_ctrl(b,cmd,num,ptr) +BIO *b; +int cmd; +long num; +char *ptr; + { + SSL **sslp,*ssl; + BIO *dbio,*bio; + long ret=1; + + ssl=(SSL *)b->ptr; + 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_EOF: + 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: + ssl_free(b); + b->shutdown=(int)num; + b->ptr=ptr; + ssl=(SSL *)ptr; + bio=SSL_get_rbio(ssl); + if (bio != NULL) + { + if (b->next_bio != NULL) + BIO_push(bio,b->next_bio); + b->next_bio=bio; + } + b->init=1; + break; + case BIO_C_GET_SSL: + if (ptr != NULL) + { + sslp=(SSL **)ptr; + *sslp=ssl; + } + 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) + { + SSL_set_bio(ssl,b->next_bio,b->next_bio); + b->next_bio->references++; + } + break; + case BIO_CTRL_POP: + /* ugly bit of a hack */ + if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */ + { + BIO_free_all(ssl->wbio); + } + 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 (dbio->ptr != NULL) + SSL_free((SSL *)dbio->ptr); + dbio->ptr=(char *)SSL_dup(ssl); + ret=(dbio->ptr != NULL); + break; + default: + return(0); + break; + } + return(ret); + } + +static int ssl_puts(bp,str) +BIO *bp; +char *str; + { + int n,ret; + + n=strlen(str); + ret=BIO_write(bp,str,n); + return(ret); + } + +BIO *BIO_new_ssl(ctx,client) +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(t,f) +BIO *t,*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 ((t->ptr == NULL) || (f->ptr == NULL)) + return(0); + SSL_copy_session_id((SSL *)t->ptr,(SSL *)f->ptr); + return(1); + } + +void BIO_ssl_shutdown(b) +BIO *b; + { + SSL *s; + + while (b != NULL) + { + if (b->method->type == BIO_TYPE_SSL) + { + s=(SSL *)b->ptr; + SSL_shutdown(s); + break; + } + b=b->next_bio; + } + } |