diff options
Diffstat (limited to 'openssl/ssl/d1_clnt.c')
| -rw-r--r-- | openssl/ssl/d1_clnt.c | 1155 |
1 files changed, 1155 insertions, 0 deletions
diff --git a/openssl/ssl/d1_clnt.c b/openssl/ssl/d1_clnt.c new file mode 100644 index 000000000..49c6760d1 --- /dev/null +++ b/openssl/ssl/d1_clnt.c @@ -0,0 +1,1155 @@ +/* ssl/d1_clnt.c */ +/* + * DTLS implementation written by Nagendra Modadugu + * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. + */ +/* ==================================================================== + * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +/* 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 "ssl_locl.h" +#include "kssl_lcl.h" +#include <openssl/buffer.h> +#include <openssl/rand.h> +#include <openssl/objects.h> +#include <openssl/evp.h> +#include <openssl/md5.h> +#ifndef OPENSSL_NO_DH +#include <openssl/dh.h> +#endif + +static SSL_METHOD *dtls1_get_client_method(int ver); +static int dtls1_get_hello_verify(SSL *s); + +static SSL_METHOD *dtls1_get_client_method(int ver) + { + if (ver == DTLS1_VERSION) + return(DTLSv1_client_method()); + else + return(NULL); + } + +IMPLEMENT_dtls1_meth_func(DTLSv1_client_method, + ssl_undefined_function, + dtls1_connect, + dtls1_get_client_method) + +int dtls1_connect(SSL *s) + { + BUF_MEM *buf=NULL; + unsigned long Time=(unsigned long)time(NULL),l; + long num1; + void (*cb)(const SSL *ssl,int type,int val)=NULL; + int ret= -1; + int new_state,state,skip=0;; + + RAND_add(&Time,sizeof(Time),0); + ERR_clear_error(); + clear_sys_error(); + + if (s->info_callback != NULL) + cb=s->info_callback; + else if (s->ctx->info_callback != NULL) + cb=s->ctx->info_callback; + + s->in_handshake++; + if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); + + for (;;) + { + state=s->state; + + switch(s->state) + { + case SSL_ST_RENEGOTIATE: + s->new_session=1; + s->state=SSL_ST_CONNECT; + s->ctx->stats.sess_connect_renegotiate++; + /* break */ + case SSL_ST_BEFORE: + case SSL_ST_CONNECT: + case SSL_ST_BEFORE|SSL_ST_CONNECT: + case SSL_ST_OK|SSL_ST_CONNECT: + + s->server=0; + if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); + + if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00)) + { + SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR); + ret = -1; + goto end; + } + + /* s->version=SSL3_VERSION; */ + s->type=SSL_ST_CONNECT; + + if (s->init_buf == NULL) + { + if ((buf=BUF_MEM_new()) == NULL) + { + ret= -1; + goto end; + } + if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) + { + ret= -1; + goto end; + } + s->init_buf=buf; + buf=NULL; + } + + if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } + + /* setup buffing BIO */ + if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } + + /* don't push the buffering BIO quite yet */ + + s->state=SSL3_ST_CW_CLNT_HELLO_A; + s->ctx->stats.sess_connect++; + s->init_num=0; + /* mark client_random uninitialized */ + memset(s->s3->client_random,0,sizeof(s->s3->client_random)); + break; + + case SSL3_ST_CW_CLNT_HELLO_A: + case SSL3_ST_CW_CLNT_HELLO_B: + + s->shutdown=0; + + /* every DTLS ClientHello resets Finished MAC */ + ssl3_init_finished_mac(s); + + ret=dtls1_client_hello(s); + if (ret <= 0) goto end; + + if ( s->d1->send_cookie) + { + s->state=SSL3_ST_CW_FLUSH; + s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A; + } + else + s->state=SSL3_ST_CR_SRVR_HELLO_A; + + s->init_num=0; + + /* turn on buffering for the next lot of output */ + if (s->bbio != s->wbio) + s->wbio=BIO_push(s->bbio,s->wbio); + + break; + + case SSL3_ST_CR_SRVR_HELLO_A: + case SSL3_ST_CR_SRVR_HELLO_B: + ret=ssl3_get_server_hello(s); + if (ret <= 0) goto end; + else + { + if (s->hit) + s->state=SSL3_ST_CR_FINISHED_A; + else + s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A; + } + s->init_num=0; + break; + + case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A: + case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B: + + ret = dtls1_get_hello_verify(s); + if ( ret <= 0) + goto end; + if ( s->d1->send_cookie) /* start again, with a cookie */ + s->state=SSL3_ST_CW_CLNT_HELLO_A; + else + s->state = SSL3_ST_CR_CERT_A; + s->init_num = 0; + break; + + case SSL3_ST_CR_CERT_A: + case SSL3_ST_CR_CERT_B: + /* Check if it is anon DH */ + if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) + { + ret=ssl3_get_server_certificate(s); + if (ret <= 0) goto end; + } + else + skip=1; + s->state=SSL3_ST_CR_KEY_EXCH_A; + s->init_num=0; + break; + + case SSL3_ST_CR_KEY_EXCH_A: + case SSL3_ST_CR_KEY_EXCH_B: + ret=ssl3_get_key_exchange(s); + if (ret <= 0) goto end; + s->state=SSL3_ST_CR_CERT_REQ_A; + s->init_num=0; + + /* at this point we check that we have the + * required stuff from the server */ + if (!ssl3_check_cert_and_algorithm(s)) + { + ret= -1; + goto end; + } + break; + + case SSL3_ST_CR_CERT_REQ_A: + case SSL3_ST_CR_CERT_REQ_B: + ret=ssl3_get_certificate_request(s); + if (ret <= 0) goto end; + s->state=SSL3_ST_CR_SRVR_DONE_A; + s->init_num=0; + break; + + case SSL3_ST_CR_SRVR_DONE_A: + case SSL3_ST_CR_SRVR_DONE_B: + ret=ssl3_get_server_done(s); + if (ret <= 0) goto end; + if (s->s3->tmp.cert_req) + s->state=SSL3_ST_CW_CERT_A; + else + s->state=SSL3_ST_CW_KEY_EXCH_A; + s->init_num=0; + + break; + + case SSL3_ST_CW_CERT_A: + case SSL3_ST_CW_CERT_B: + case SSL3_ST_CW_CERT_C: + case SSL3_ST_CW_CERT_D: + ret=dtls1_send_client_certificate(s); + if (ret <= 0) goto end; + s->state=SSL3_ST_CW_KEY_EXCH_A; + s->init_num=0; + break; + + case SSL3_ST_CW_KEY_EXCH_A: + case SSL3_ST_CW_KEY_EXCH_B: + ret=dtls1_send_client_key_exchange(s); + if (ret <= 0) goto end; + l=s->s3->tmp.new_cipher->algorithms; + /* EAY EAY EAY need to check for DH fix cert + * sent back */ + /* For TLS, cert_req is set to 2, so a cert chain + * of nothing is sent, but no verify packet is sent */ + if (s->s3->tmp.cert_req == 1) + { + s->state=SSL3_ST_CW_CERT_VRFY_A; + } + else + { + s->state=SSL3_ST_CW_CHANGE_A; + s->s3->change_cipher_spec=0; + } + + s->init_num=0; + break; + + case SSL3_ST_CW_CERT_VRFY_A: + case SSL3_ST_CW_CERT_VRFY_B: + ret=dtls1_send_client_verify(s); + if (ret <= 0) goto end; + s->state=SSL3_ST_CW_CHANGE_A; + s->init_num=0; + s->s3->change_cipher_spec=0; + break; + + case SSL3_ST_CW_CHANGE_A: + case SSL3_ST_CW_CHANGE_B: + ret=dtls1_send_change_cipher_spec(s, + SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); + if (ret <= 0) goto end; + s->state=SSL3_ST_CW_FINISHED_A; + s->init_num=0; + + s->session->cipher=s->s3->tmp.new_cipher; +#ifdef OPENSSL_NO_COMP + s->session->compress_meth=0; +#else + if (s->s3->tmp.new_compression == NULL) + s->session->compress_meth=0; + else + s->session->compress_meth= + s->s3->tmp.new_compression->id; +#endif + if (!s->method->ssl3_enc->setup_key_block(s)) + { + ret= -1; + goto end; + } + + if (!s->method->ssl3_enc->change_cipher_state(s, + SSL3_CHANGE_CIPHER_CLIENT_WRITE)) + { + ret= -1; + goto end; + } + + dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); + break; + + case SSL3_ST_CW_FINISHED_A: + case SSL3_ST_CW_FINISHED_B: + ret=dtls1_send_finished(s, + SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, + s->method->ssl3_enc->client_finished_label, + s->method->ssl3_enc->client_finished_label_len); + if (ret <= 0) goto end; + s->state=SSL3_ST_CW_FLUSH; + + /* clear flags */ + s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; + if (s->hit) + { + s->s3->tmp.next_state=SSL_ST_OK; + if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) + { + s->state=SSL_ST_OK; + s->s3->flags|=SSL3_FLAGS_POP_BUFFER; + s->s3->delay_buf_pop_ret=0; + } + } + else + { + s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; + } + s->init_num=0; + /* mark client_random uninitialized */ + memset (s->s3->client_random,0,sizeof(s->s3->client_random)); + + break; + + case SSL3_ST_CR_FINISHED_A: + case SSL3_ST_CR_FINISHED_B: + + ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, + SSL3_ST_CR_FINISHED_B); + if (ret <= 0) goto end; + + if (s->hit) + s->state=SSL3_ST_CW_CHANGE_A; + else + s->state=SSL_ST_OK; + s->init_num=0; + break; + + case SSL3_ST_CW_FLUSH: + /* number of bytes to be flushed */ + num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); + if (num1 > 0) + { + s->rwstate=SSL_WRITING; + num1=BIO_flush(s->wbio); + if (num1 <= 0) { ret= -1; goto end; } + s->rwstate=SSL_NOTHING; + } + + s->state=s->s3->tmp.next_state; + break; + + case SSL_ST_OK: + /* clean a few things up */ + ssl3_cleanup_key_block(s); + +#if 0 + if (s->init_buf != NULL) + { + BUF_MEM_free(s->init_buf); + s->init_buf=NULL; + } +#endif + + /* If we are not 'joining' the last two packets, + * remove the buffering now */ + if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) + ssl_free_wbio_buffer(s); + /* else do it later in ssl3_write */ + + s->init_num=0; + s->new_session=0; + + ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); + if (s->hit) s->ctx->stats.sess_hit++; + + ret=1; + /* s->server=0; */ + s->handshake_func=dtls1_connect; + s->ctx->stats.sess_connect_good++; + + if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); + + /* done with handshaking */ + s->d1->handshake_read_seq = 0; + goto end; + /* break; */ + + default: + SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE); + ret= -1; + goto end; + /* break; */ + } + + /* did we do anything */ + if (!s->s3->tmp.reuse_message && !skip) + { + if (s->debug) + { + if ((ret=BIO_flush(s->wbio)) <= 0) + goto end; + } + + if ((cb != NULL) && (s->state != state)) + { + new_state=s->state; + s->state=state; + cb(s,SSL_CB_CONNECT_LOOP,1); + s->state=new_state; + } + } + skip=0; + } +end: + s->in_handshake--; + if (buf != NULL) + BUF_MEM_free(buf); + if (cb != NULL) + cb(s,SSL_CB_CONNECT_EXIT,ret); + return(ret); + } + +int dtls1_client_hello(SSL *s) + { + unsigned char *buf; + unsigned char *p,*d; + unsigned int i,j; + unsigned long Time,l; + SSL_COMP *comp; + + buf=(unsigned char *)s->init_buf->data; + if (s->state == SSL3_ST_CW_CLNT_HELLO_A) + { + if ((s->session == NULL) || + (s->session->ssl_version != s->version) || + (s->session->not_resumable)) + { + if (!ssl_get_new_session(s,0)) + goto err; + } + /* else use the pre-loaded session */ + + p=s->s3->client_random; + /* if client_random is initialized, reuse it, we are + * required to use same upon reply to HelloVerify */ + for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ; + if (i==sizeof(s->s3->client_random)) + { + Time=(unsigned long)time(NULL); /* Time */ + l2n(Time,p); + RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4); + } + + /* Do the message type and length last */ + d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); + + *(p++)=s->version>>8; + *(p++)=s->version&0xff; + s->client_version=s->version; + + /* Random stuff */ + memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + + /* Session ID */ + if (s->new_session) + i=0; + else + i=s->session->session_id_length; + *(p++)=i; + if (i != 0) + { + if (i > sizeof s->session->session_id) + { + SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + goto err; + } + memcpy(p,s->session->session_id,i); + p+=i; + } + + /* cookie stuff */ + if ( s->d1->cookie_len > sizeof(s->d1->cookie)) + { + SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + goto err; + } + *(p++) = s->d1->cookie_len; + memcpy(p, s->d1->cookie, s->d1->cookie_len); + p += s->d1->cookie_len; + + /* Ciphers supported */ + i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); + if (i == 0) + { + SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); + goto err; + } + s2n(i,p); + p+=i; + + /* COMPRESSION */ + if (s->ctx->comp_methods == NULL) + j=0; + else + j=sk_SSL_COMP_num(s->ctx->comp_methods); + *(p++)=1+j; + for (i=0; i<j; i++) + { + comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); + *(p++)=comp->id; + } + *(p++)=0; /* Add the NULL method */ + + l=(p-d); + d=buf; + + d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l); + + s->state=SSL3_ST_CW_CLNT_HELLO_B; + /* number of bytes to write */ + s->init_num=p-buf; + s->init_off=0; + + /* buffer the message to handle re-xmits */ + dtls1_buffer_message(s, 0); + } + + /* SSL3_ST_CW_CLNT_HELLO_B */ + return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); +err: + return(-1); + } + +static int dtls1_get_hello_verify(SSL *s) + { + int n, al, ok = 0; + unsigned char *data; + unsigned int cookie_len; + + n=s->method->ssl_get_message(s, + DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A, + DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, + -1, + s->max_cert_list, + &ok); + + if (!ok) return((int)n); + + if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) + { + s->d1->send_cookie = 0; + s->s3->tmp.reuse_message=1; + return(1); + } + + data = (unsigned char *)s->init_msg; + + if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff))) + { + SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION); + s->version=(s->version&0xff00)|data[1]; + al = SSL_AD_PROTOCOL_VERSION; + goto f_err; + } + data+=2; + + cookie_len = *(data++); + if ( cookie_len > sizeof(s->d1->cookie)) + { + al=SSL_AD_ILLEGAL_PARAMETER; + goto f_err; + } + + memcpy(s->d1->cookie, data, cookie_len); + s->d1->cookie_len = cookie_len; + + s->d1->send_cookie = 1; + return 1; + +f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); + return -1; + } + +int dtls1_send_client_key_exchange(SSL *s) + { + unsigned char *p,*d; + int n; + unsigned long l; +#ifndef OPENSSL_NO_RSA + unsigned char *q; + EVP_PKEY *pkey=NULL; +#endif +#ifndef OPENSSL_NO_KRB5 + KSSL_ERR kssl_err; +#endif /* OPENSSL_NO_KRB5 */ + + if (s->state == SSL3_ST_CW_KEY_EXCH_A) + { + d=(unsigned char *)s->init_buf->data; + p= &(d[DTLS1_HM_HEADER_LENGTH]); + + l=s->s3->tmp.new_cipher->algorithms; + + /* Fool emacs indentation */ + if (0) {} +#ifndef OPENSSL_NO_RSA + else if (l & SSL_kRSA) + { + RSA *rsa; + unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; + + if (s->session->sess_cert->peer_rsa_tmp != NULL) + rsa=s->session->sess_cert->peer_rsa_tmp; + else + { + pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); + if ((pkey == NULL) || + (pkey->type != EVP_PKEY_RSA) || + (pkey->pkey.rsa == NULL)) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); + goto err; + } + rsa=pkey->pkey.rsa; + EVP_PKEY_free(pkey); + } + + tmp_buf[0]=s->client_version>>8; + tmp_buf[1]=s->client_version&0xff; + if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) + goto err; + + s->session->master_key_length=sizeof tmp_buf; + + q=p; + /* Fix buf for TLS and [incidentally] DTLS */ + if (s->version > SSL3_VERSION) + p+=2; + n=RSA_public_encrypt(sizeof tmp_buf, + tmp_buf,p,rsa,RSA_PKCS1_PADDING); +#ifdef PKCS1_CHECK + if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; + if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; +#endif + if (n <= 0) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); + goto err; + } + + /* Fix buf for TLS and [incidentally] DTLS */ + if (s->version > SSL3_VERSION) + { + s2n(n,q); + n+=2; + } + + s->session->master_key_length= + s->method->ssl3_enc->generate_master_secret(s, + s->session->master_key, + tmp_buf,sizeof tmp_buf); + OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); + } +#endif +#ifndef OPENSSL_NO_KRB5 + else if (l & SSL_kKRB5) + { + krb5_error_code krb5rc; + KSSL_CTX *kssl_ctx = s->kssl_ctx; + /* krb5_data krb5_ap_req; */ + krb5_data *enc_ticket; + krb5_data authenticator, *authp = NULL; + EVP_CIPHER_CTX ciph_ctx; + EVP_CIPHER *enc = NULL; + unsigned char iv[EVP_MAX_IV_LENGTH]; + unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; + unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + + EVP_MAX_IV_LENGTH]; + int padl, outl = sizeof(epms); + + EVP_CIPHER_CTX_init(&ciph_ctx); + +#ifdef KSSL_DEBUG + printf("ssl3_send_client_key_exchange(%lx & %lx)\n", + l, SSL_kKRB5); +#endif /* KSSL_DEBUG */ + + authp = NULL; +#ifdef KRB5SENDAUTH + if (KRB5SENDAUTH) authp = &authenticator; +#endif /* KRB5SENDAUTH */ + + krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, + &kssl_err); + enc = kssl_map_enc(kssl_ctx->enctype); + if (enc == NULL) + goto err; +#ifdef KSSL_DEBUG + { + printf("kssl_cget_tkt rtn %d\n", krb5rc); + if (krb5rc && kssl_err.text) + printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); + } +#endif /* KSSL_DEBUG */ + + if (krb5rc) + { + ssl3_send_alert(s,SSL3_AL_FATAL, + SSL_AD_HANDSHAKE_FAILURE); + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, + kssl_err.reason); + goto err; + } + + /* 20010406 VRS - Earlier versions used KRB5 AP_REQ + ** in place of RFC 2712 KerberosWrapper, as in: + ** + ** Send ticket (copy to *p, set n = length) + ** n = krb5_ap_req.length; + ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); + ** if (krb5_ap_req.data) + ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); + ** + ** Now using real RFC 2712 KerberosWrapper + ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) + ** Note: 2712 "opaque" types are here replaced + ** with a 2-byte length followed by the value. + ** Example: + ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms + ** Where "xx xx" = length bytes. Shown here with + ** optional authenticator omitted. + */ + + /* KerberosWrapper.Ticket */ + s2n(enc_ticket->length,p); + memcpy(p, enc_ticket->data, enc_ticket->length); + p+= enc_ticket->length; + n = enc_ticket->length + 2; + + /* KerberosWrapper.Authenticator */ + if (authp && authp->length) + { + s2n(authp->length,p); + memcpy(p, authp->data, authp->length); + p+= authp->length; + n+= authp->length + 2; + + free(authp->data); + authp->data = NULL; + authp->length = 0; + } + else + { + s2n(0,p);/* null authenticator length */ + n+=2; + } + + if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0) + goto err; + + /* 20010420 VRS. Tried it this way; failed. + ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); + ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, + ** kssl_ctx->length); + ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); + */ + + memset(iv, 0, sizeof iv); /* per RFC 1510 */ + EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, + kssl_ctx->key,iv); + EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, + sizeof tmp_buf); + EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); + outl += padl; + if (outl > sizeof epms) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto err; + } + EVP_CIPHER_CTX_cleanup(&ciph_ctx); + + /* KerberosWrapper.EncryptedPreMasterSecret */ + s2n(outl,p); + memcpy(p, epms, outl); + p+=outl; + n+=outl + 2; + + s->session->master_key_length= + s->method->ssl3_enc->generate_master_secret(s, + s->session->master_key, + tmp_buf, sizeof tmp_buf); + + OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); + OPENSSL_cleanse(epms, outl); + } +#endif +#ifndef OPENSSL_NO_DH + else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) + { + DH *dh_srvr,*dh_clnt; + + if (s->session->sess_cert->peer_dh_tmp != NULL) + dh_srvr=s->session->sess_cert->peer_dh_tmp; + else + { + /* we get them from the cert */ + ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); + goto err; + } + + /* generate a new random key */ + if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); + goto err; + } + if (!DH_generate_key(dh_clnt)) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); + goto err; + } + + /* use the 'p' output buffer for the DH key, but + * make sure to clear it out afterwards */ + + n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); + + if (n <= 0) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); + goto err; + } + + /* generate master key from the result */ + s->session->master_key_length= + s->method->ssl3_enc->generate_master_secret(s, + s->session->master_key,p,n); + /* clean up */ + memset(p,0,n); + + /* send off the data */ + n=BN_num_bytes(dh_clnt->pub_key); + s2n(n,p); + BN_bn2bin(dh_clnt->pub_key,p); + n+=2; + + DH_free(dh_clnt); + + /* perhaps clean things up a bit EAY EAY EAY EAY*/ + } +#endif + else + { + ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); + SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); + goto err; + } + + d = dtls1_set_message_header(s, d, + SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n); + /* + *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; + l2n3(n,d); + l2n(s->d1->handshake_write_seq,d); + s->d1->handshake_write_seq++; + */ + + s->state=SSL3_ST_CW_KEY_EXCH_B; + /* number of bytes to write */ + s->init_num=n+DTLS1_HM_HEADER_LENGTH; + s->init_off=0; + + /* buffer the message to handle re-xmits */ + dtls1_buffer_message(s, 0); + } + + /* SSL3_ST_CW_KEY_EXCH_B */ + return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); +err: + return(-1); + } + +int dtls1_send_client_verify(SSL *s) + { + unsigned char *p,*d; + unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; + EVP_PKEY *pkey; +#ifndef OPENSSL_NO_RSA + unsigned u=0; +#endif + unsigned long n; +#ifndef OPENSSL_NO_DSA + int j; +#endif + + if (s->state == SSL3_ST_CW_CERT_VRFY_A) + { + d=(unsigned char *)s->init_buf->data; + p= &(d[DTLS1_HM_HEADER_LENGTH]); + pkey=s->cert->key->privatekey; + + s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), + &(data[MD5_DIGEST_LENGTH])); + +#ifndef OPENSSL_NO_RSA + if (pkey->type == EVP_PKEY_RSA) + { + s->method->ssl3_enc->cert_verify_mac(s, + &(s->s3->finish_dgst1),&(data[0])); + if (RSA_sign(NID_md5_sha1, data, + MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, + &(p[2]), &u, pkey->pkey.rsa) <= 0 ) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); + goto err; + } + s2n(u,p); + n=u+2; + } + else +#endif +#ifndef OPENSSL_NO_DSA + if (pkey->type == EVP_PKEY_DSA) + { + if (!DSA_sign(pkey->save_type, + &(data[MD5_DIGEST_LENGTH]), + SHA_DIGEST_LENGTH,&(p[2]), + (unsigned int *)&j,pkey->pkey.dsa)) + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); + goto err; + } + s2n(j,p); + n=j+2; + } + else +#endif + { + SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); + goto err; + } + + d = dtls1_set_message_header(s, d, + SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ; + + s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH; + s->init_off=0; + + /* buffer the message to handle re-xmits */ + dtls1_buffer_message(s, 0); + + s->state = SSL3_ST_CW_CERT_VRFY_B; + } + + /* s->state = SSL3_ST_CW_CERT_VRFY_B */ + return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); +err: + return(-1); + } + +int dtls1_send_client_certificate(SSL *s) + { + X509 *x509=NULL; + EVP_PKEY *pkey=NULL; + int i; + unsigned long l; + + if (s->state == SSL3_ST_CW_CERT_A) + { + if ((s->cert == NULL) || + (s->cert->key->x509 == NULL) || + (s->cert->key->privatekey == NULL)) + s->state=SSL3_ST_CW_CERT_B; + else + s->state=SSL3_ST_CW_CERT_C; + } + + /* We need to get a client cert */ + if (s->state == SSL3_ST_CW_CERT_B) + { + /* If we get an error, we need to + * ssl->rwstate=SSL_X509_LOOKUP; return(-1); + * We then get retied later */ + i=0; + i = ssl_do_client_cert_cb(s, &x509, &pkey); + if (i < 0) + { + s->rwstate=SSL_X509_LOOKUP; + return(-1); + } + s->rwstate=SSL_NOTHING; + if ((i == 1) && (pkey != NULL) && (x509 != NULL)) + { + s->state=SSL3_ST_CW_CERT_B; + if ( !SSL_use_certificate(s,x509) || + !SSL_use_PrivateKey(s,pkey)) + i=0; + } + else if (i == 1) + { + i=0; + SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); + } + + if (x509 != NULL) X509_free(x509); + if (pkey != NULL) EVP_PKEY_free(pkey); + if (i == 0) + { + if (s->version == SSL3_VERSION) + { + s->s3->tmp.cert_req=0; + ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); + return(1); + } + else + { + s->s3->tmp.cert_req=2; + } + } + + /* Ok, we have a cert */ + s->state=SSL3_ST_CW_CERT_C; + } + + if (s->state == SSL3_ST_CW_CERT_C) + { + s->state=SSL3_ST_CW_CERT_D; + l=dtls1_output_cert_chain(s, + (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); + s->init_num=(int)l; + s->init_off=0; + + /* set header called by dtls1_output_cert_chain() */ + + /* buffer the message to handle re-xmits */ + dtls1_buffer_message(s, 0); + } + /* SSL3_ST_CW_CERT_D */ + return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); + } + + |