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authorKris Kennaway <kris@FreeBSD.org>2000-01-10 06:22:05 +0000
committerKris Kennaway <kris@FreeBSD.org>2000-01-10 06:22:05 +0000
commit74664626283603849f4acbd49e8c8288c08cff4d (patch)
treeb5683ff3d44c93978826763313683673904c6bd9 /crypto/openssl/ssl/s3_srvr.c
parentf5952845872443119d7617dd3ef63397853419c1 (diff)
downloadsrc-74664626283603849f4acbd49e8c8288c08cff4d.tar.gz
src-74664626283603849f4acbd49e8c8288c08cff4d.zip
Initial import of OpenSSL 0.9.4, sans IDEA and RSA code for patent
infringement reasons.
Notes
Notes: svn path=/vendor-crypto/openssl/dist/; revision=55714
Diffstat (limited to 'crypto/openssl/ssl/s3_srvr.c')
-rw-r--r--crypto/openssl/ssl/s3_srvr.c1683
1 files changed, 1683 insertions, 0 deletions
diff --git a/crypto/openssl/ssl/s3_srvr.c b/crypto/openssl/ssl/s3_srvr.c
new file mode 100644
index 000000000000..e003d8835746
--- /dev/null
+++ b/crypto/openssl/ssl/s3_srvr.c
@@ -0,0 +1,1683 @@
+/* ssl/s3_srvr.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.]
+ */
+
+#define REUSE_CIPHER_BUG
+
+#include <stdio.h>
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/md5.h>
+#include <openssl/sha.h>
+#include <openssl/evp.h>
+#include <openssl/x509.h>
+#include "ssl_locl.h"
+
+static SSL_METHOD *ssl3_get_server_method(int ver);
+static int ssl3_get_client_hello(SSL *s);
+static int ssl3_send_server_hello(SSL *s);
+static int ssl3_send_server_key_exchange(SSL *s);
+static int ssl3_send_certificate_request(SSL *s);
+static int ssl3_send_server_done(SSL *s);
+static int ssl3_get_cert_verify(SSL *s);
+static int ssl3_get_client_key_exchange(SSL *s);
+static int ssl3_get_client_certificate(SSL *s);
+static int ssl3_send_hello_request(SSL *s);
+
+static SSL_METHOD *ssl3_get_server_method(int ver)
+ {
+ if (ver == SSL3_VERSION)
+ return(SSLv3_server_method());
+ else
+ return(NULL);
+ }
+
+SSL_METHOD *SSLv3_server_method(void)
+ {
+ static int init=1;
+ static SSL_METHOD SSLv3_server_data;
+
+ if (init)
+ {
+ memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
+ sizeof(SSL_METHOD));
+ SSLv3_server_data.ssl_accept=ssl3_accept;
+ SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
+ init=0;
+ }
+ return(&SSLv3_server_data);
+ }
+
+int ssl3_accept(SSL *s)
+ {
+ BUF_MEM *buf;
+ unsigned long l,Time=time(NULL);
+ void (*cb)()=NULL;
+ long num1;
+ int ret= -1;
+ int new_state,state,skip=0;
+
+ RAND_seed(&Time,sizeof(Time));
+ 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;
+
+ /* init things to blank */
+ if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
+ s->in_handshake++;
+
+ if (s->cert == NULL)
+ {
+ SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
+ return(-1);
+ }
+
+ for (;;)
+ {
+ state=s->state;
+
+ switch (s->state)
+ {
+ case SSL_ST_RENEGOTIATE:
+ s->new_session=1;
+ /* s->state=SSL_ST_ACCEPT; */
+
+ case SSL_ST_BEFORE:
+ case SSL_ST_ACCEPT:
+ case SSL_ST_BEFORE|SSL_ST_ACCEPT:
+ case SSL_ST_OK|SSL_ST_ACCEPT:
+
+ s->server=1;
+ if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
+
+ if ((s->version>>8) != 3)
+ abort();
+ /* s->version=SSL3_VERSION; */
+ s->type=SSL_ST_ACCEPT;
+
+ 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;
+ }
+
+ if (!ssl3_setup_buffers(s))
+ {
+ ret= -1;
+ goto end;
+ }
+
+ /* Ok, we now need to push on a buffering BIO so that
+ * the output is sent in a way that TCP likes :-)
+ */
+ if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
+
+ s->init_num=0;
+
+ if (s->state != SSL_ST_RENEGOTIATE)
+ {
+ s->state=SSL3_ST_SR_CLNT_HELLO_A;
+ ssl3_init_finished_mac(s);
+ s->ctx->stats.sess_accept++;
+ }
+ else
+ {
+ s->ctx->stats.sess_accept_renegotiate++;
+ s->state=SSL3_ST_SW_HELLO_REQ_A;
+ }
+ break;
+
+ case SSL3_ST_SW_HELLO_REQ_A:
+ case SSL3_ST_SW_HELLO_REQ_B:
+
+ s->shutdown=0;
+ ret=ssl3_send_hello_request(s);
+ if (ret <= 0) goto end;
+ s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
+ s->state=SSL3_ST_SW_FLUSH;
+ s->init_num=0;
+
+ ssl3_init_finished_mac(s);
+ break;
+
+ case SSL3_ST_SW_HELLO_REQ_C:
+ s->state=SSL_ST_OK;
+ ret=1;
+ goto end;
+ /* break; */
+
+ case SSL3_ST_SR_CLNT_HELLO_A:
+ case SSL3_ST_SR_CLNT_HELLO_B:
+ case SSL3_ST_SR_CLNT_HELLO_C:
+
+ s->shutdown=0;
+ ret=ssl3_get_client_hello(s);
+ if (ret <= 0) goto end;
+ s->state=SSL3_ST_SW_SRVR_HELLO_A;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SW_SRVR_HELLO_A:
+ case SSL3_ST_SW_SRVR_HELLO_B:
+ ret=ssl3_send_server_hello(s);
+ if (ret <= 0) goto end;
+
+ if (s->hit)
+ s->state=SSL3_ST_SW_CHANGE_A;
+ else
+ s->state=SSL3_ST_SW_CERT_A;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SW_CERT_A:
+ case SSL3_ST_SW_CERT_B:
+ /* Check if it is anon DH */
+ if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
+ {
+ ret=ssl3_send_server_certificate(s);
+ if (ret <= 0) goto end;
+ }
+ else
+ skip=1;
+ s->state=SSL3_ST_SW_KEY_EXCH_A;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SW_KEY_EXCH_A:
+ case SSL3_ST_SW_KEY_EXCH_B:
+ l=s->s3->tmp.new_cipher->algorithms;
+
+ /* clear this, it may get reset by
+ * send_server_key_exchange */
+ if (s->options & SSL_OP_EPHEMERAL_RSA)
+ s->s3->tmp.use_rsa_tmp=1;
+ else
+ s->s3->tmp.use_rsa_tmp=0;
+
+ /* only send if a DH key exchange, fortezza or
+ * RSA but we have a sign only certificate */
+ if (s->s3->tmp.use_rsa_tmp
+ || (l & (SSL_DH|SSL_kFZA))
+ || ((l & SSL_kRSA)
+ && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
+ || (SSL_IS_EXPORT(l)
+ && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
+ )
+ )
+ )
+ )
+ {
+ ret=ssl3_send_server_key_exchange(s);
+ if (ret <= 0) goto end;
+ }
+ else
+ skip=1;
+
+ s->state=SSL3_ST_SW_CERT_REQ_A;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SW_CERT_REQ_A:
+ case SSL3_ST_SW_CERT_REQ_B:
+ if (!(s->verify_mode & SSL_VERIFY_PEER) ||
+ ((s->session->peer != NULL) &&
+ (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
+ {
+ /* no cert request */
+ skip=1;
+ s->s3->tmp.cert_request=0;
+ s->state=SSL3_ST_SW_SRVR_DONE_A;
+ }
+ else
+ {
+ s->s3->tmp.cert_request=1;
+ ret=ssl3_send_certificate_request(s);
+ if (ret <= 0) goto end;
+ s->state=SSL3_ST_SW_SRVR_DONE_A;
+ s->init_num=0;
+ }
+ break;
+
+ case SSL3_ST_SW_SRVR_DONE_A:
+ case SSL3_ST_SW_SRVR_DONE_B:
+ ret=ssl3_send_server_done(s);
+ if (ret <= 0) goto end;
+ s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
+ s->state=SSL3_ST_SW_FLUSH;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SW_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 SSL3_ST_SR_CERT_A:
+ case SSL3_ST_SR_CERT_B:
+ /* could be sent for a DH cert, even if we
+ * have not asked for it :-) */
+ ret=ssl3_get_client_certificate(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ s->state=SSL3_ST_SR_KEY_EXCH_A;
+ break;
+
+ case SSL3_ST_SR_KEY_EXCH_A:
+ case SSL3_ST_SR_KEY_EXCH_B:
+ ret=ssl3_get_client_key_exchange(s);
+ if (ret <= 0) goto end;
+ s->state=SSL3_ST_SR_CERT_VRFY_A;
+ s->init_num=0;
+
+ /* We need to get hashes here so if there is
+ * a client cert, it can be verified */
+ s->method->ssl3_enc->cert_verify_mac(s,
+ &(s->s3->finish_dgst1),
+ &(s->s3->tmp.finish_md[0]));
+ s->method->ssl3_enc->cert_verify_mac(s,
+ &(s->s3->finish_dgst2),
+ &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
+
+ break;
+
+ case SSL3_ST_SR_CERT_VRFY_A:
+ case SSL3_ST_SR_CERT_VRFY_B:
+
+ /* we should decide if we expected this one */
+ ret=ssl3_get_cert_verify(s);
+ if (ret <= 0) goto end;
+
+ s->state=SSL3_ST_SR_FINISHED_A;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SR_FINISHED_A:
+ case SSL3_ST_SR_FINISHED_B:
+ ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
+ SSL3_ST_SR_FINISHED_B);
+ if (ret <= 0) goto end;
+ if (s->hit)
+ s->state=SSL_ST_OK;
+ else
+ s->state=SSL3_ST_SW_CHANGE_A;
+ s->init_num=0;
+ break;
+
+ case SSL3_ST_SW_CHANGE_A:
+ case SSL3_ST_SW_CHANGE_B:
+
+ s->session->cipher=s->s3->tmp.new_cipher;
+ if (!s->method->ssl3_enc->setup_key_block(s))
+ { ret= -1; goto end; }
+
+ ret=ssl3_send_change_cipher_spec(s,
+ SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
+
+ if (ret <= 0) goto end;
+ s->state=SSL3_ST_SW_FINISHED_A;
+ s->init_num=0;
+
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CHANGE_CIPHER_SERVER_WRITE))
+ {
+ ret= -1;
+ goto end;
+ }
+
+ break;
+
+ case SSL3_ST_SW_FINISHED_A:
+ case SSL3_ST_SW_FINISHED_B:
+ ret=ssl3_send_finished(s,
+ SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
+ s->method->ssl3_enc->server_finished,
+ s->method->ssl3_enc->server_finished_len);
+ if (ret <= 0) goto end;
+ s->state=SSL3_ST_SW_FLUSH;
+ if (s->hit)
+ s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
+ else
+ s->s3->tmp.next_state=SSL_ST_OK;
+ s->init_num=0;
+ break;
+
+ case SSL_ST_OK:
+ /* clean a few things up */
+ ssl3_cleanup_key_block(s);
+
+ BUF_MEM_free(s->init_buf);
+ s->init_buf=NULL;
+
+ /* remove buffering on output */
+ ssl_free_wbio_buffer(s);
+
+ s->new_session=0;
+ s->init_num=0;
+
+ ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
+
+ s->ctx->stats.sess_accept_good++;
+ /* s->server=1; */
+ s->handshake_func=ssl3_accept;
+ ret=1;
+
+ if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
+
+ goto end;
+ /* break; */
+
+ default:
+ SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
+ ret= -1;
+ goto end;
+ /* break; */
+ }
+
+ 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_ACCEPT_LOOP,1);
+ s->state=new_state;
+ }
+ }
+ skip=0;
+ }
+end:
+ /* BIO_flush(s->wbio); */
+
+ if (cb != NULL)
+ cb(s,SSL_CB_ACCEPT_EXIT,ret);
+ s->in_handshake--;
+ return(ret);
+ }
+
+static int ssl3_send_hello_request(SSL *s)
+ {
+ unsigned char *p;
+
+ if (s->state == SSL3_ST_SW_HELLO_REQ_A)
+ {
+ p=(unsigned char *)s->init_buf->data;
+ *(p++)=SSL3_MT_CLIENT_REQUEST;
+ *(p++)=0;
+ *(p++)=0;
+ *(p++)=0;
+
+ s->state=SSL3_ST_SW_HELLO_REQ_B;
+ /* number of bytes to write */
+ s->init_num=4;
+ s->init_off=0;
+ }
+
+ /* SSL3_ST_SW_HELLO_REQ_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+ }
+
+static int ssl3_get_client_hello(SSL *s)
+ {
+ int i,j,ok,al,ret= -1;
+ long n;
+ unsigned long id;
+ unsigned char *p,*d,*q;
+ SSL_CIPHER *c;
+ SSL_COMP *comp=NULL;
+ STACK_OF(SSL_CIPHER) *ciphers=NULL;
+
+ /* We do this so that we will respond with our native type.
+ * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
+ * This down switching should be handled by a different method.
+ * If we are SSLv3, we will respond with SSLv3, even if prompted with
+ * TLSv1.
+ */
+ if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
+ {
+ s->first_packet=1;
+ s->state=SSL3_ST_SR_CLNT_HELLO_B;
+ }
+ n=ssl3_get_message(s,
+ SSL3_ST_SR_CLNT_HELLO_B,
+ SSL3_ST_SR_CLNT_HELLO_C,
+ SSL3_MT_CLIENT_HELLO,
+ SSL3_RT_MAX_PLAIN_LENGTH,
+ &ok);
+
+ if (!ok) return((int)n);
+ d=p=(unsigned char *)s->init_buf->data;
+
+ /* The version number has already been checked in ssl3_get_message.
+ * I a native TLSv1/SSLv3 method, the match must be correct except
+ * perhaps for the first message */
+/* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
+ p+=2;
+
+ /* load the client random */
+ memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
+ p+=SSL3_RANDOM_SIZE;
+
+ /* get the session-id */
+ j= *(p++);
+
+ s->hit=0;
+ if (j == 0)
+ {
+ if (!ssl_get_new_session(s,1))
+ goto err;
+ }
+ else
+ {
+ i=ssl_get_prev_session(s,p,j);
+ if (i == 1)
+ { /* previous session */
+ s->hit=1;
+ }
+ else if (i == -1)
+ goto err;
+ else /* i == 0 */
+ {
+ if (!ssl_get_new_session(s,1))
+ goto err;
+ }
+ }
+
+ p+=j;
+ n2s(p,i);
+ if ((i == 0) && (j != 0))
+ {
+ /* we need a cipher if we are not resuming a session */
+ al=SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
+ goto f_err;
+ }
+ if ((i+p) > (d+n))
+ {
+ /* not enough data */
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
+ == NULL))
+ {
+ goto err;
+ }
+ p+=i;
+
+ /* If it is a hit, check that the cipher is in the list */
+ if ((s->hit) && (i > 0))
+ {
+ j=0;
+ id=s->session->cipher->id;
+
+#ifdef CIPHER_DEBUG
+ printf("client sent %d ciphers\n",sk_num(ciphers));
+#endif
+ for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
+ {
+ c=sk_SSL_CIPHER_value(ciphers,i);
+#ifdef CIPHER_DEBUG
+ printf("client [%2d of %2d]:%s\n",
+ i,sk_num(ciphers),SSL_CIPHER_get_name(c));
+#endif
+ if (c->id == id)
+ {
+ j=1;
+ break;
+ }
+ }
+ if (j == 0)
+ {
+ if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
+ {
+ /* Very bad for multi-threading.... */
+ s->session->cipher=sk_SSL_CIPHER_value(ciphers,
+ 0);
+ }
+ else
+ {
+ /* we need to have the cipher in the cipher
+ * list if we are asked to reuse it */
+ al=SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
+ goto f_err;
+ }
+ }
+ }
+
+ /* compression */
+ i= *(p++);
+ q=p;
+ for (j=0; j<i; j++)
+ {
+ if (p[j] == 0) break;
+ }
+
+ p+=i;
+ if (j >= i)
+ {
+ /* no compress */
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
+ goto f_err;
+ }
+
+ /* Worst case, we will use the NULL compression, but if we have other
+ * options, we will now look for them. We have i-1 compression
+ * algorithms from the client, starting at q. */
+ s->s3->tmp.new_compression=NULL;
+ if (s->ctx->comp_methods != NULL)
+ { /* See if we have a match */
+ int m,nn,o,v,done=0;
+
+ nn=sk_SSL_COMP_num(s->ctx->comp_methods);
+ for (m=0; m<nn; m++)
+ {
+ comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
+ v=comp->id;
+ for (o=0; o<i; o++)
+ {
+ if (v == q[o])
+ {
+ done=1;
+ break;
+ }
+ }
+ if (done) break;
+ }
+ if (done)
+ s->s3->tmp.new_compression=comp;
+ else
+ comp=NULL;
+ }
+
+ /* TLS does not mind if there is extra stuff */
+ if (s->version == SSL3_VERSION)
+ {
+ if (p > (d+n))
+ {
+ /* wrong number of bytes,
+ * there could be more to follow */
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ }
+
+ /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
+ * pick a cipher */
+
+ if (!s->hit)
+ {
+ s->session->compress_meth=(comp == NULL)?0:comp->id;
+ if (s->session->ciphers != NULL)
+ sk_SSL_CIPHER_free(s->session->ciphers);
+ s->session->ciphers=ciphers;
+ if (ciphers == NULL)
+ {
+ al=SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
+ goto f_err;
+ }
+ ciphers=NULL;
+ c=ssl3_choose_cipher(s,s->session->ciphers,
+ ssl_get_ciphers_by_id(s));
+
+ if (c == NULL)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
+ goto f_err;
+ }
+ s->s3->tmp.new_cipher=c;
+ }
+ else
+ {
+ /* Session-id reuse */
+#ifdef REUSE_CIPHER_BUG
+ STACK_OF(SSL_CIPHER) *sk;
+ SSL_CIPHER *nc=NULL;
+ SSL_CIPHER *ec=NULL;
+
+ if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
+ {
+ sk=s->session->ciphers;
+ for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
+ {
+ c=sk_SSL_CIPHER_value(sk,i);
+ if (c->algorithms & SSL_eNULL)
+ nc=c;
+ if (SSL_C_IS_EXPORT(c))
+ ec=c;
+ }
+ if (nc != NULL)
+ s->s3->tmp.new_cipher=nc;
+ else if (ec != NULL)
+ s->s3->tmp.new_cipher=ec;
+ else
+ s->s3->tmp.new_cipher=s->session->cipher;
+ }
+ else
+#endif
+ s->s3->tmp.new_cipher=s->session->cipher;
+ }
+
+ /* we now have the following setup.
+ * client_random
+ * cipher_list - our prefered list of ciphers
+ * ciphers - the clients prefered list of ciphers
+ * compression - basically ignored right now
+ * ssl version is set - sslv3
+ * s->session - The ssl session has been setup.
+ * s->hit - sesson reuse flag
+ * s->tmp.new_cipher - the new cipher to use.
+ */
+
+ ret=1;
+ if (0)
+ {
+f_err:
+ ssl3_send_alert(s,SSL3_AL_FATAL,al);
+ }
+err:
+ if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
+ return(ret);
+ }
+
+static int ssl3_send_server_hello(SSL *s)
+ {
+ unsigned char *buf;
+ unsigned char *p,*d;
+ int i,sl;
+ unsigned long l,Time;
+
+ if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
+ {
+ buf=(unsigned char *)s->init_buf->data;
+ p=s->s3->server_random;
+ Time=time(NULL); /* Time */
+ l2n(Time,p);
+ RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
+ /* Do the message type and length last */
+ d=p= &(buf[4]);
+
+ *(p++)=s->version>>8;
+ *(p++)=s->version&0xff;
+
+ /* Random stuff */
+ memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
+ p+=SSL3_RANDOM_SIZE;
+
+ /* now in theory we have 3 options to sending back the
+ * session id. If it is a re-use, we send back the
+ * old session-id, if it is a new session, we send
+ * back the new session-id or we send back a 0 length
+ * session-id if we want it to be single use.
+ * Currently I will not implement the '0' length session-id
+ * 12-Jan-98 - I'll now support the '0' length stuff.
+ */
+ if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
+ s->session->session_id_length=0;
+
+ sl=s->session->session_id_length;
+ *(p++)=sl;
+ memcpy(p,s->session->session_id,sl);
+ p+=sl;
+
+ /* put the cipher */
+ i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
+ p+=i;
+
+ /* put the compression method */
+ if (s->s3->tmp.new_compression == NULL)
+ *(p++)=0;
+ else
+ *(p++)=s->s3->tmp.new_compression->id;
+
+ /* do the header */
+ l=(p-d);
+ d=buf;
+ *(d++)=SSL3_MT_SERVER_HELLO;
+ l2n3(l,d);
+
+ s->state=SSL3_ST_CW_CLNT_HELLO_B;
+ /* number of bytes to write */
+ s->init_num=p-buf;
+ s->init_off=0;
+ }
+
+ /* SSL3_ST_CW_CLNT_HELLO_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+ }
+
+static int ssl3_send_server_done(SSL *s)
+ {
+ unsigned char *p;
+
+ if (s->state == SSL3_ST_SW_SRVR_DONE_A)
+ {
+ p=(unsigned char *)s->init_buf->data;
+
+ /* do the header */
+ *(p++)=SSL3_MT_SERVER_DONE;
+ *(p++)=0;
+ *(p++)=0;
+ *(p++)=0;
+
+ s->state=SSL3_ST_SW_SRVR_DONE_B;
+ /* number of bytes to write */
+ s->init_num=4;
+ s->init_off=0;
+ }
+
+ /* SSL3_ST_CW_CLNT_HELLO_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+ }
+
+static int ssl3_send_server_key_exchange(SSL *s)
+ {
+#ifndef NO_RSA
+ unsigned char *q;
+ int j,num;
+ RSA *rsa;
+ unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
+#endif
+#ifndef NO_DH
+ DH *dh,*dhp;
+#endif
+ EVP_PKEY *pkey;
+ unsigned char *p,*d;
+ int al,i;
+ unsigned long type;
+ int n;
+ CERT *cert;
+ BIGNUM *r[4];
+ int nr[4],kn;
+ BUF_MEM *buf;
+ EVP_MD_CTX md_ctx;
+
+ if (s->state == SSL3_ST_SW_KEY_EXCH_A)
+ {
+ type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
+ cert=s->cert;
+
+ buf=s->init_buf;
+
+ r[0]=r[1]=r[2]=r[3]=NULL;
+ n=0;
+#ifndef NO_RSA
+ if (type & SSL_kRSA)
+ {
+ rsa=cert->rsa_tmp;
+ if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
+ {
+ rsa=s->cert->rsa_tmp_cb(s,
+ SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
+ CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
+ cert->rsa_tmp=rsa;
+ }
+ if (rsa == NULL)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
+ goto f_err;
+ }
+ r[0]=rsa->n;
+ r[1]=rsa->e;
+ s->s3->tmp.use_rsa_tmp=1;
+ }
+ else
+#endif
+#ifndef NO_DH
+ if (type & SSL_kEDH)
+ {
+ dhp=cert->dh_tmp;
+ if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
+ dhp=s->cert->dh_tmp_cb(s,
+ !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
+ if (dhp == NULL)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
+ goto f_err;
+ }
+ if ((dh=DHparams_dup(dhp)) == NULL)
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
+ goto err;
+ }
+
+ s->s3->tmp.dh=dh;
+ if ((dhp->pub_key == NULL ||
+ dhp->priv_key == NULL ||
+ (s->options & SSL_OP_SINGLE_DH_USE)))
+ {
+ if(!DH_generate_key(dh))
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
+ ERR_R_DH_LIB);
+ goto err;
+ }
+ }
+ else
+ {
+ dh->pub_key=BN_dup(dhp->pub_key);
+ dh->priv_key=BN_dup(dhp->priv_key);
+ if ((dh->pub_key == NULL) ||
+ (dh->priv_key == NULL))
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
+ goto err;
+ }
+ }
+ r[0]=dh->p;
+ r[1]=dh->g;
+ r[2]=dh->pub_key;
+ }
+ else
+#endif
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
+ goto f_err;
+ }
+ for (i=0; r[i] != NULL; i++)
+ {
+ nr[i]=BN_num_bytes(r[i]);
+ n+=2+nr[i];
+ }
+
+ if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
+ {
+ if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
+ == NULL)
+ {
+ al=SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ kn=EVP_PKEY_size(pkey);
+ }
+ else
+ {
+ pkey=NULL;
+ kn=0;
+ }
+
+ if (!BUF_MEM_grow(buf,n+4+kn))
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
+ goto err;
+ }
+ d=(unsigned char *)s->init_buf->data;
+ p= &(d[4]);
+
+ for (i=0; r[i] != NULL; i++)
+ {
+ s2n(nr[i],p);
+ BN_bn2bin(r[i],p);
+ p+=nr[i];
+ }
+
+ /* not anonymous */
+ if (pkey != NULL)
+ {
+ /* n is the length of the params, they start at &(d[4])
+ * and p points to the space at the end. */
+#ifndef NO_RSA
+ if (pkey->type == EVP_PKEY_RSA)
+ {
+ q=md_buf;
+ j=0;
+ for (num=2; num > 0; num--)
+ {
+ EVP_DigestInit(&md_ctx,(num == 2)
+ ?s->ctx->md5:s->ctx->sha1);
+ EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md_ctx,&(d[4]),n);
+ EVP_DigestFinal(&md_ctx,q,
+ (unsigned int *)&i);
+ q+=i;
+ j+=i;
+ }
+ i=RSA_private_encrypt(j,md_buf,&(p[2]),
+ pkey->pkey.rsa,RSA_PKCS1_PADDING);
+ if (i <= 0)
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
+ goto err;
+ }
+ s2n(i,p);
+ n+=i+2;
+ }
+ else
+#endif
+#if !defined(NO_DSA)
+ if (pkey->type == EVP_PKEY_DSA)
+ {
+ /* lets do DSS */
+ EVP_SignInit(&md_ctx,EVP_dss1());
+ EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
+ EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
+ EVP_SignUpdate(&md_ctx,&(d[4]),n);
+ if (!EVP_SignFinal(&md_ctx,&(p[2]),
+ (unsigned int *)&i,pkey))
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
+ goto err;
+ }
+ s2n(i,p);
+ n+=i+2;
+ }
+ else
+#endif
+ {
+ /* Is this error check actually needed? */
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
+ goto f_err;
+ }
+ }
+
+ *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
+ l2n3(n,d);
+
+ /* we should now have things packed up, so lets send
+ * it off */
+ s->init_num=n+4;
+ s->init_off=0;
+ }
+
+ /* SSL3_ST_SW_KEY_EXCH_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+f_err:
+ ssl3_send_alert(s,SSL3_AL_FATAL,al);
+err:
+ return(-1);
+ }
+
+static int ssl3_send_certificate_request(SSL *s)
+ {
+ unsigned char *p,*d;
+ int i,j,nl,off,n;
+ STACK_OF(X509_NAME) *sk=NULL;
+ X509_NAME *name;
+ BUF_MEM *buf;
+
+ if (s->state == SSL3_ST_SW_CERT_REQ_A)
+ {
+ buf=s->init_buf;
+
+ d=p=(unsigned char *)&(buf->data[4]);
+
+ /* get the list of acceptable cert types */
+ p++;
+ n=ssl3_get_req_cert_type(s,p);
+ d[0]=n;
+ p+=n;
+ n++;
+
+ off=n;
+ p+=2;
+ n+=2;
+
+ sk=SSL_get_client_CA_list(s);
+ nl=0;
+ if (sk != NULL)
+ {
+ for (i=0; i<sk_X509_NAME_num(sk); i++)
+ {
+ name=sk_X509_NAME_value(sk,i);
+ j=i2d_X509_NAME(name,NULL);
+ if (!BUF_MEM_grow(buf,4+n+j+2))
+ {
+ SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
+ goto err;
+ }
+ p=(unsigned char *)&(buf->data[4+n]);
+ if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
+ {
+ s2n(j,p);
+ i2d_X509_NAME(name,&p);
+ n+=2+j;
+ nl+=2+j;
+ }
+ else
+ {
+ d=p;
+ i2d_X509_NAME(name,&p);
+ j-=2; s2n(j,d); j+=2;
+ n+=j;
+ nl+=j;
+ }
+ }
+ }
+ /* else no CA names */
+ p=(unsigned char *)&(buf->data[4+off]);
+ s2n(nl,p);
+
+ d=(unsigned char *)buf->data;
+ *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
+ l2n3(n,d);
+
+ /* we should now have things packed up, so lets send
+ * it off */
+
+ s->init_num=n+4;
+ s->init_off=0;
+ }
+
+ /* SSL3_ST_SW_CERT_REQ_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+err:
+ return(-1);
+ }
+
+static int ssl3_get_client_key_exchange(SSL *s)
+ {
+ int i,al,ok;
+ long n;
+ unsigned long l;
+ unsigned char *p;
+#ifndef NO_RSA
+ RSA *rsa=NULL;
+ EVP_PKEY *pkey=NULL;
+#endif
+#ifndef NO_DH
+ BIGNUM *pub=NULL;
+ DH *dh_srvr;
+#endif
+
+ n=ssl3_get_message(s,
+ SSL3_ST_SR_KEY_EXCH_A,
+ SSL3_ST_SR_KEY_EXCH_B,
+ SSL3_MT_CLIENT_KEY_EXCHANGE,
+ 400, /* ???? */
+ &ok);
+
+ if (!ok) return((int)n);
+ p=(unsigned char *)s->init_buf->data;
+
+ l=s->s3->tmp.new_cipher->algorithms;
+
+#ifndef NO_RSA
+ if (l & SSL_kRSA)
+ {
+ /* FIX THIS UP EAY EAY EAY EAY */
+ if (s->s3->tmp.use_rsa_tmp)
+ {
+ if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
+ rsa=s->cert->rsa_tmp;
+ /* Don't do a callback because rsa_tmp should
+ * be sent already */
+ if (rsa == NULL)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
+ goto f_err;
+
+ }
+ }
+ else
+ {
+ pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
+ if ( (pkey == NULL) ||
+ (pkey->type != EVP_PKEY_RSA) ||
+ (pkey->pkey.rsa == NULL))
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
+ goto f_err;
+ }
+ rsa=pkey->pkey.rsa;
+ }
+
+ /* TLS */
+ if (s->version > SSL3_VERSION)
+ {
+ n2s(p,i);
+ if (n != i+2)
+ {
+ if (!(s->options & SSL_OP_TLS_D5_BUG))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
+ goto err;
+ }
+ else
+ p-=2;
+ }
+ else
+ n=i;
+ }
+
+ i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
+
+#if 1
+ /* If a bad decrypt, use a random master key */
+ if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
+ ((p[0] != (s->client_version>>8)) ||
+ (p[1] != (s->client_version & 0xff))))
+ {
+ int bad=1;
+
+ if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
+ (p[0] == (s->version>>8)) &&
+ (p[1] == 0))
+ {
+ if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
+ bad=0;
+ }
+ if (bad)
+ {
+ p[0]=(s->version>>8);
+ p[1]=(s->version & 0xff);
+ RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
+ i=SSL_MAX_MASTER_KEY_LENGTH;
+ }
+ /* else, an SSLeay bug, ssl only server, tls client */
+ }
+#else
+ if (i != SSL_MAX_MASTER_KEY_LENGTH)
+ {
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
+ goto f_err;
+ }
+
+ if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
+ {
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
+ goto f_err;
+ }
+#endif
+
+ s->session->master_key_length=
+ s->method->ssl3_enc->generate_master_secret(s,
+ s->session->master_key,
+ p,i);
+ memset(p,0,i);
+ }
+ else
+#endif
+#ifndef NO_DH
+ if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
+ {
+ n2s(p,i);
+ if (n != i+2)
+ {
+ if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
+ goto err;
+ }
+ else
+ {
+ p-=2;
+ i=(int)n;
+ }
+ }
+
+ if (n == 0L) /* the parameters are in the cert */
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
+ goto f_err;
+ }
+ else
+ {
+ if (s->s3->tmp.dh == NULL)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
+ goto f_err;
+ }
+ else
+ dh_srvr=s->s3->tmp.dh;
+ }
+
+ pub=BN_bin2bn(p,i,NULL);
+ if (pub == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
+ goto err;
+ }
+
+ i=DH_compute_key(p,pub,dh_srvr);
+
+ if (i <= 0)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
+ goto err;
+ }
+
+ DH_free(s->s3->tmp.dh);
+ s->s3->tmp.dh=NULL;
+
+ BN_clear_free(pub);
+ pub=NULL;
+ s->session->master_key_length=
+ s->method->ssl3_enc->generate_master_secret(s,
+ s->session->master_key,p,i);
+ }
+ else
+#endif
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
+ goto f_err;
+ }
+
+ return(1);
+f_err:
+ ssl3_send_alert(s,SSL3_AL_FATAL,al);
+#if !defined(NO_DH) || !defined(NO_RSA)
+err:
+#endif
+ return(-1);
+ }
+
+static int ssl3_get_cert_verify(SSL *s)
+ {
+ EVP_PKEY *pkey=NULL;
+ unsigned char *p;
+ int al,ok,ret=0;
+ long n;
+ int type=0,i,j;
+ X509 *peer;
+
+ n=ssl3_get_message(s,
+ SSL3_ST_SR_CERT_VRFY_A,
+ SSL3_ST_SR_CERT_VRFY_B,
+ -1,
+ 512, /* 512? */
+ &ok);
+
+ if (!ok) return((int)n);
+
+ if (s->session->peer != NULL)
+ {
+ peer=s->session->peer;
+ pkey=X509_get_pubkey(peer);
+ type=X509_certificate_type(peer,pkey);
+ }
+ else
+ {
+ peer=NULL;
+ pkey=NULL;
+ }
+
+ if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
+ {
+ s->s3->tmp.reuse_message=1;
+ if ((peer != NULL) && (type | EVP_PKT_SIGN))
+ {
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
+ goto f_err;
+ }
+ ret=1;
+ goto end;
+ }
+
+ if (peer == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ goto f_err;
+ }
+
+ if (!(type & EVP_PKT_SIGN))
+ {
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
+ al=SSL_AD_ILLEGAL_PARAMETER;
+ goto f_err;
+ }
+
+ if (s->s3->change_cipher_spec)
+ {
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ goto f_err;
+ }
+
+ /* we now have a signature that we need to verify */
+ p=(unsigned char *)s->init_buf->data;
+ n2s(p,i);
+ n-=2;
+ if (i > n)
+ {
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
+ al=SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ j=EVP_PKEY_size(pkey);
+ if ((i > j) || (n > j) || (n <= 0))
+ {
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
+ al=SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+#ifndef NO_RSA
+ if (pkey->type == EVP_PKEY_RSA)
+ {
+ i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
+ if (i < 0)
+ {
+ al=SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
+ goto f_err;
+ }
+ if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
+ memcmp(&(s->s3->tmp.finish_md[0]),p,
+ MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
+ {
+ al=SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
+ goto f_err;
+ }
+ }
+ else
+#endif
+#ifndef NO_DSA
+ if (pkey->type == EVP_PKEY_DSA)
+ {
+ j=DSA_verify(pkey->save_type,
+ &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
+ SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
+ if (j <= 0)
+ {
+ /* bad signature */
+ al=SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
+ goto f_err;
+ }
+ }
+ else
+#endif
+ {
+ SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
+ al=SSL_AD_UNSUPPORTED_CERTIFICATE;
+ goto f_err;
+ }
+
+
+ ret=1;
+ if (0)
+ {
+f_err:
+ ssl3_send_alert(s,SSL3_AL_FATAL,al);
+ }
+end:
+ EVP_PKEY_free(pkey);
+ return(ret);
+ }
+
+static int ssl3_get_client_certificate(SSL *s)
+ {
+ int i,ok,al,ret= -1;
+ X509 *x=NULL;
+ unsigned long l,nc,llen,n;
+ unsigned char *p,*d,*q;
+ STACK_OF(X509) *sk=NULL;
+
+ n=ssl3_get_message(s,
+ SSL3_ST_SR_CERT_A,
+ SSL3_ST_SR_CERT_B,
+ -1,
+#if defined(MSDOS) && !defined(WIN32)
+ 1024*30, /* 30k max cert list :-) */
+#else
+ 1024*100, /* 100k max cert list :-) */
+#endif
+ &ok);
+
+ if (!ok) return((int)n);
+
+ if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
+ {
+ if ( (s->verify_mode & SSL_VERIFY_PEER) &&
+ (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ goto f_err;
+ }
+ /* If tls asked for a client cert we must return a 0 list */
+ if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ goto f_err;
+ }
+ s->s3->tmp.reuse_message=1;
+ return(1);
+ }
+
+ if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
+ {
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
+ goto f_err;
+ }
+ d=p=(unsigned char *)s->init_buf->data;
+
+ if ((sk=sk_X509_new_null()) == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ n2l3(p,llen);
+ if (llen+3 != n)
+ {
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ for (nc=0; nc<llen; )
+ {
+ n2l3(p,l);
+ if ((l+nc+3) > llen)
+ {
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ q=p;
+ x=d2i_X509(NULL,&p,l);
+ if (x == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
+ goto err;
+ }
+ if (p != (q+l))
+ {
+ al=SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if (!sk_X509_push(sk,x))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ x=NULL;
+ nc+=l+3;
+ }
+
+ if (sk_X509_num(sk) <= 0)
+ {
+ /* TLS does not mind 0 certs returned */
+ if (s->version == SSL3_VERSION)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
+ goto f_err;
+ }
+ /* Fail for TLS only if we required a certificate */
+ else if ((s->verify_mode & SSL_VERIFY_PEER) &&
+ (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ goto f_err;
+ }
+ }
+ else
+ {
+ i=ssl_verify_cert_chain(s,sk);
+ if (!i)
+ {
+ al=ssl_verify_alarm_type(s->verify_result);
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
+ goto f_err;
+ }
+ }
+
+ if (s->session->peer != NULL) /* This should not be needed */
+ X509_free(s->session->peer);
+ s->session->peer=sk_X509_shift(sk);
+
+ /* With the current implementation, sess_cert will always be NULL
+ * when we arrive here. */
+ if (s->session->sess_cert == NULL)
+ {
+ s->session->sess_cert = ssl_sess_cert_new();
+ if (s->session->sess_cert == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+ if (s->session->sess_cert->cert_chain != NULL)
+ sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
+ s->session->sess_cert->cert_chain=sk;
+
+ sk=NULL;
+
+ ret=1;
+ if (0)
+ {
+f_err:
+ ssl3_send_alert(s,SSL3_AL_FATAL,al);
+ }
+err:
+ if (x != NULL) X509_free(x);
+ if (sk != NULL) sk_X509_pop_free(sk,X509_free);
+ return(ret);
+ }
+
+int ssl3_send_server_certificate(SSL *s)
+ {
+ unsigned long l;
+ X509 *x;
+
+ if (s->state == SSL3_ST_SW_CERT_A)
+ {
+ x=ssl_get_server_send_cert(s);
+ if (x == NULL)
+ {
+ SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
+ return(0);
+ }
+
+ l=ssl3_output_cert_chain(s,x);
+ s->state=SSL3_ST_SW_CERT_B;
+ s->init_num=(int)l;
+ s->init_off=0;
+ }
+
+ /* SSL3_ST_SW_CERT_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+ }