/* ssl/d1_clnt.c */
-/*
+/*
* DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
*/
/* ====================================================================
* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
* 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:
* 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
+ * 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
* 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
#include <stdio.h>
#include "ssl_locl.h"
-#ifndef OPENSSL_NO_KRB5
-#include "kssl_lcl.h"
-#endif
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/md5.h>
#include <openssl/bn.h>
#ifndef OPENSSL_NO_DH
-#include <openssl/dh.h>
+# include <openssl/dh.h>
#endif
static const SSL_METHOD *dtls1_get_client_method(int ver);
-static int dtls1_get_hello_verify(SSL *s);
static const SSL_METHOD *dtls1_get_client_method(int ver)
- {
- if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
- 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);
- 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) &&
- (s->version & 0xff00 ) != (DTLS1_BAD_VER & 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);
-
- dtls1_start_timer(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
- {
- dtls1_stop_timer(s);
- 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;
- dtls1_stop_timer(s);
- 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->algorithm_auth & 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:
- dtls1_start_timer(s);
- 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:
- dtls1_start_timer(s);
- ret=dtls1_send_client_key_exchange(s);
- if (ret <= 0) goto end;
- /* 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:
- dtls1_start_timer(s);
- 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:
- dtls1_start_timer(s);
- 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:
- dtls1_start_timer(s);
- 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;
- 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;
- dtls1_stop_timer(s);
-
- 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;
- s->d1->next_handshake_write_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,sizeof(s->s3->client_random)-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 alg_k;
-#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]);
-
- alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
-
- /* Fool emacs indentation */
- if (0) {}
-#ifndef OPENSSL_NO_RSA
- else if (alg_k & 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 (alg_k & 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;
- const 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",
- alg_k, 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 > (int)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 (alg_k & (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,
- NID_sha1,
- &(data[MD5_DIGEST_LENGTH]));
-
-#ifndef OPENSSL_NO_RSA
- if (pkey->type == EVP_PKEY_RSA)
- {
- s->method->ssl3_enc->cert_verify_mac(s,
- NID_md5,
- &(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));
- }
-
-
+{
+ if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
+ return (DTLSv1_client_method());
+ else if (ver == DTLS1_2_VERSION)
+ return (DTLSv1_2_client_method());
+ else
+ return (NULL);
+}
+
+IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
+ DTLSv1_client_method,
+ ssl_undefined_function,
+ dtls1_connect,
+ dtls1_get_client_method, DTLSv1_enc_data)
+
+ IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
+ DTLSv1_2_client_method,
+ ssl_undefined_function,
+ dtls1_connect,
+ dtls1_get_client_method, DTLSv1_2_enc_data)
+
+ IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
+ DTLS_client_method,
+ ssl_undefined_function,
+ dtls1_connect,
+ dtls1_get_client_method, DTLSv1_2_enc_data)
+
+
+enum MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, unsigned long n)
+{
+ int al;
+ unsigned char *data;
+ unsigned int cookie_len;
+
+ data = (unsigned char *)s->init_msg;
+ 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;
+
+ return MSG_PROCESS_FINISHED_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
projects / openssl.git / blobdiff