--- /dev/null
+/* ssl/s2_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.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2001 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).
+ *
+ */
+
+#include "ssl_locl.h"
+#ifndef OPENSSL_NO_SSL2
+#include <stdio.h>
+#include <openssl/bio.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+
+static const SSL_METHOD *ssl2_get_server_method(int ver);
+static int get_client_master_key(SSL *s);
+static int get_client_hello(SSL *s);
+static int server_hello(SSL *s);
+static int get_client_finished(SSL *s);
+static int server_verify(SSL *s);
+static int server_finish(SSL *s);
+static int request_certificate(SSL *s);
+static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
+ unsigned char *to,int padding);
+#define BREAK break
+
+static const SSL_METHOD *ssl2_get_server_method(int ver)
+ {
+ if (ver == SSL2_VERSION)
+ return(SSLv2_server_method());
+ else
+ return(NULL);
+ }
+
+IMPLEMENT_ssl2_meth_func(SSLv2_server_method,
+ ssl2_accept,
+ ssl_undefined_function,
+ ssl2_get_server_method)
+
+int ssl2_accept(SSL *s)
+ {
+ unsigned long l=(unsigned long)time(NULL);
+ BUF_MEM *buf=NULL;
+ int ret= -1;
+ long num1;
+ void (*cb)(const SSL *ssl,int type,int val)=NULL;
+ int new_state,state;
+
+ RAND_add(&l,sizeof(l),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;
+
+ /* init things to blank */
+ s->in_handshake++;
+ if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
+
+ if (s->cert == NULL)
+ {
+ SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
+ return(-1);
+ }
+
+ clear_sys_error();
+ for (;;)
+ {
+ state=s->state;
+
+ switch (s->state)
+ {
+ 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);
+
+ s->version=SSL2_VERSION;
+ s->type=SSL_ST_ACCEPT;
+
+ buf=s->init_buf;
+ if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
+ { ret= -1; goto end; }
+ if (!BUF_MEM_grow(buf,(int)
+ SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
+ { ret= -1; goto end; }
+ s->init_buf=buf;
+ s->init_num=0;
+ s->ctx->stats.sess_accept++;
+ s->handshake_func=ssl2_accept;
+ s->state=SSL2_ST_GET_CLIENT_HELLO_A;
+ BREAK;
+
+ case SSL2_ST_GET_CLIENT_HELLO_A:
+ case SSL2_ST_GET_CLIENT_HELLO_B:
+ case SSL2_ST_GET_CLIENT_HELLO_C:
+ s->shutdown=0;
+ ret=get_client_hello(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ s->state=SSL2_ST_SEND_SERVER_HELLO_A;
+ BREAK;
+
+ case SSL2_ST_SEND_SERVER_HELLO_A:
+ case SSL2_ST_SEND_SERVER_HELLO_B:
+ ret=server_hello(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ if (!s->hit)
+ {
+ s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
+ BREAK;
+ }
+ else
+ {
+ s->state=SSL2_ST_SERVER_START_ENCRYPTION;
+ BREAK;
+ }
+ case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
+ case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
+ ret=get_client_master_key(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ s->state=SSL2_ST_SERVER_START_ENCRYPTION;
+ BREAK;
+
+ case SSL2_ST_SERVER_START_ENCRYPTION:
+ /* Ok we how have sent all the stuff needed to
+ * start encrypting, the next packet back will
+ * be encrypted. */
+ if (!ssl2_enc_init(s,0))
+ { ret= -1; goto end; }
+ s->s2->clear_text=0;
+ s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
+ BREAK;
+
+ case SSL2_ST_SEND_SERVER_VERIFY_A:
+ case SSL2_ST_SEND_SERVER_VERIFY_B:
+ ret=server_verify(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ if (s->hit)
+ {
+ /* If we are in here, we have been
+ * buffering the output, so we need to
+ * flush it and remove buffering from
+ * future traffic */
+ s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
+ BREAK;
+ }
+ else
+ {
+ s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
+ break;
+ }
+
+ case SSL2_ST_SEND_SERVER_VERIFY_C:
+ /* get the number of bytes to write */
+ 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;
+ }
+
+ /* flushed and now remove buffering */
+ s->wbio=BIO_pop(s->wbio);
+
+ s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
+ BREAK;
+
+ case SSL2_ST_GET_CLIENT_FINISHED_A:
+ case SSL2_ST_GET_CLIENT_FINISHED_B:
+ ret=get_client_finished(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num=0;
+ s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
+ BREAK;
+
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
+ /* don't do a 'request certificate' if we
+ * don't want to, or we already have one, and
+ * we only want to do it once. */
+ if (!(s->verify_mode & SSL_VERIFY_PEER) ||
+ ((s->session->peer != NULL) &&
+ (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
+ {
+ s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
+ break;
+ }
+ else
+ {
+ ret=request_certificate(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
+ }
+ BREAK;
+
+ case SSL2_ST_SEND_SERVER_FINISHED_A:
+ case SSL2_ST_SEND_SERVER_FINISHED_B:
+ ret=server_finish(s);
+ if (ret <= 0) goto end;
+ s->init_num=0;
+ s->state=SSL_ST_OK;
+ break;
+
+ case SSL_ST_OK:
+ BUF_MEM_free(s->init_buf);
+ ssl_free_wbio_buffer(s);
+ s->init_buf=NULL;
+ s->init_num=0;
+ /* ERR_clear_error();*/
+
+ ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
+
+ s->ctx->stats.sess_accept_good++;
+ /* s->server=1; */
+ ret=1;
+
+ if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
+
+ goto end;
+ /* BREAK; */
+
+ default:
+ SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
+ ret= -1;
+ goto end;
+ /* BREAK; */
+ }
+
+ if ((cb != NULL) && (s->state != state))
+ {
+ new_state=s->state;
+ s->state=state;
+ cb(s,SSL_CB_ACCEPT_LOOP,1);
+ s->state=new_state;
+ }
+ }
+end:
+ s->in_handshake--;
+ if (cb != NULL)
+ cb(s,SSL_CB_ACCEPT_EXIT,ret);
+ return(ret);
+ }
+
+static int get_client_master_key(SSL *s)
+ {
+ int is_export,i,n,keya,ek;
+ unsigned long len;
+ unsigned char *p;
+ const SSL_CIPHER *cp;
+ const EVP_CIPHER *c;
+ const EVP_MD *md;
+
+ p=(unsigned char *)s->init_buf->data;
+ if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
+ {
+ i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
+
+ if (i < (10-s->init_num))
+ return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
+ s->init_num = 10;
+
+ if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
+ {
+ if (p[-1] != SSL2_MT_ERROR)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
+ }
+ else
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
+ return(-1);
+ }
+
+ cp=ssl2_get_cipher_by_char(p);
+ if (cp == NULL)
+ {
+ ssl2_return_error(s,SSL2_PE_NO_CIPHER);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
+ return(-1);
+ }
+ s->session->cipher= cp;
+
+ p+=3;
+ n2s(p,i); s->s2->tmp.clear=i;
+ n2s(p,i); s->s2->tmp.enc=i;
+ n2s(p,i);
+ if(i > SSL_MAX_KEY_ARG_LENGTH)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
+ return -1;
+ }
+ s->session->key_arg_length=i;
+ s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
+ }
+
+ /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
+ p=(unsigned char *)s->init_buf->data;
+ if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ keya=s->session->key_arg_length;
+ len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
+ if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
+ return -1;
+ }
+ n = (int)len - s->init_num;
+ i = ssl2_read(s,(char *)&(p[s->init_num]),n);
+ if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
+ p += 10;
+
+ memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
+ (unsigned int)keya);
+
+ if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
+ return(-1);
+ }
+ i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
+ &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
+ (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
+
+ is_export=SSL_C_IS_EXPORT(s->session->cipher);
+
+ if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL))
+ {
+ ssl2_return_error(s,SSL2_PE_NO_CIPHER);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
+ return(0);
+ }
+
+ if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
+ {
+ is_export=1;
+ ek=8;
+ }
+ else
+ ek=5;
+
+ /* bad decrypt */
+#if 1
+ /* If a bad decrypt, continue with protocol but with a
+ * random master secret (Bleichenbacher attack) */
+ if ((i < 0) ||
+ ((!is_export && (i != EVP_CIPHER_key_length(c)))
+ || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
+ (unsigned int)EVP_CIPHER_key_length(c))))))
+ {
+ ERR_clear_error();
+ if (is_export)
+ i=ek;
+ else
+ i=EVP_CIPHER_key_length(c);
+ if (RAND_pseudo_bytes(p,i) <= 0)
+ return 0;
+ }
+#else
+ if (i < 0)
+ {
+ error=1;
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
+ }
+ /* incorrect number of key bytes for non export cipher */
+ else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
+ || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
+ EVP_CIPHER_key_length(c)))))
+ {
+ error=1;
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
+ }
+ if (error)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ return(-1);
+ }
+#endif
+
+ if (is_export) i+=s->s2->tmp.clear;
+
+ if (i > SSL_MAX_MASTER_KEY_LENGTH)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ s->session->master_key_length=i;
+ memcpy(s->session->master_key,p,(unsigned int)i);
+ return(1);
+ }
+
+static int get_client_hello(SSL *s)
+ {
+ int i,n;
+ unsigned long len;
+ unsigned char *p;
+ STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
+ STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
+ STACK_OF(SSL_CIPHER) *prio, *allow;
+ int z;
+
+ /* This is a bit of a hack to check for the correct packet
+ * type the first time round. */
+ if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
+ {
+ s->first_packet=1;
+ s->state=SSL2_ST_GET_CLIENT_HELLO_B;
+ }
+
+ p=(unsigned char *)s->init_buf->data;
+ if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
+ {
+ i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
+ if (i < (9-s->init_num))
+ return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
+ s->init_num = 9;
+
+ if (*(p++) != SSL2_MT_CLIENT_HELLO)
+ {
+ if (p[-1] != SSL2_MT_ERROR)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
+ }
+ else
+ SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
+ return(-1);
+ }
+ n2s(p,i);
+ if (i < s->version) s->version=i;
+ n2s(p,i); s->s2->tmp.cipher_spec_length=i;
+ n2s(p,i); s->s2->tmp.session_id_length=i;
+ n2s(p,i); s->s2->challenge_length=i;
+ if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
+ (i > SSL2_MAX_CHALLENGE_LENGTH))
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
+ return(-1);
+ }
+ s->state=SSL2_ST_GET_CLIENT_HELLO_C;
+ }
+
+ /* SSL2_ST_GET_CLIENT_HELLO_C */
+ p=(unsigned char *)s->init_buf->data;
+ len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
+ if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
+ return -1;
+ }
+ n = (int)len - s->init_num;
+ i = ssl2_read(s,(char *)&(p[s->init_num]),n);
+ if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
+ p += 9;
+
+ /* get session-id before cipher stuff so we can get out session
+ * structure if it is cached */
+ /* session-id */
+ if ((s->s2->tmp.session_id_length != 0) &&
+ (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
+ return(-1);
+ }
+
+ if (s->s2->tmp.session_id_length == 0)
+ {
+ if (!ssl_get_new_session(s,1))
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ return(-1);
+ }
+ }
+ else
+ {
+ i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
+ s->s2->tmp.session_id_length, NULL);
+ if (i == 1)
+ { /* previous session */
+ s->hit=1;
+ }
+ else if (i == -1)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ return(-1);
+ }
+ else
+ {
+ if (s->cert == NULL)
+ {
+ ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
+ SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
+ return(-1);
+ }
+
+ if (!ssl_get_new_session(s,1))
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ return(-1);
+ }
+ }
+ }
+
+ if (!s->hit)
+ {
+ cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
+ &s->session->ciphers);
+ if (cs == NULL) goto mem_err;
+
+ cl=SSL_get_ciphers(s);
+
+ if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
+ {
+ prio=sk_SSL_CIPHER_dup(cl);
+ if (prio == NULL) goto mem_err;
+ allow = cs;
+ }
+ else
+ {
+ prio = cs;
+ allow = cl;
+ }
+ for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
+ {
+ if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
+ {
+ (void)sk_SSL_CIPHER_delete(prio,z);
+ z--;
+ }
+ }
+ if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
+ {
+ sk_SSL_CIPHER_free(s->session->ciphers);
+ s->session->ciphers = prio;
+ }
+ /* s->session->ciphers should now have a list of
+ * ciphers that are on both the client and server.
+ * This list is ordered by the order the client sent
+ * the ciphers or in the order of the server's preference
+ * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
+ */
+ }
+ p+=s->s2->tmp.cipher_spec_length;
+ /* done cipher selection */
+
+ /* session id extracted already */
+ p+=s->s2->tmp.session_id_length;
+
+ /* challenge */
+ if (s->s2->challenge_length > sizeof s->s2->challenge)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
+ return(1);
+mem_err:
+ SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+
+static int server_hello(SSL *s)
+ {
+ unsigned char *p,*d;
+ int n,hit;
+
+ p=(unsigned char *)s->init_buf->data;
+ if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
+ {
+ d=p+11;
+ *(p++)=SSL2_MT_SERVER_HELLO; /* type */
+ hit=s->hit;
+ *(p++)=(unsigned char)hit;
+#if 1
+ if (!hit)
+ {
+ if (s->session->sess_cert != NULL)
+ /* This can't really happen because get_client_hello
+ * has called ssl_get_new_session, which does not set
+ * sess_cert. */
+ ssl_sess_cert_free(s->session->sess_cert);
+ s->session->sess_cert = ssl_sess_cert_new();
+ if (s->session->sess_cert == NULL)
+ {
+ SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
+ return(-1);
+ }
+ }
+ /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
+ * depending on whether it survived in the internal cache
+ * or was retrieved from an external cache.
+ * If it is NULL, we cannot put any useful data in it anyway,
+ * so we don't touch it.
+ */
+
+#else /* That's what used to be done when cert_st and sess_cert_st were
+ * the same. */
+ if (!hit)
+ { /* else add cert to session */
+ CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
+ if (s->session->sess_cert != NULL)
+ ssl_cert_free(s->session->sess_cert);
+ s->session->sess_cert=s->cert;
+ }
+ else /* We have a session id-cache hit, if the
+ * session-id has no certificate listed against
+ * the 'cert' structure, grab the 'old' one
+ * listed against the SSL connection */
+ {
+ if (s->session->sess_cert == NULL)
+ {
+ CRYPTO_add(&s->cert->references,1,
+ CRYPTO_LOCK_SSL_CERT);
+ s->session->sess_cert=s->cert;
+ }
+ }
+#endif
+
+ if (s->cert == NULL)
+ {
+ ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
+ SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
+ return(-1);
+ }
+
+ if (hit)
+ {
+ *(p++)=0; /* no certificate type */
+ s2n(s->version,p); /* version */
+ s2n(0,p); /* cert len */
+ s2n(0,p); /* ciphers len */
+ }
+ else
+ {
+ /* EAY EAY */
+ /* put certificate type */
+ *(p++)=SSL2_CT_X509_CERTIFICATE;
+ s2n(s->version,p); /* version */
+ n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
+ s2n(n,p); /* certificate length */
+ i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
+ n=0;
+
+ /* lets send out the ciphers we like in the
+ * prefered order */
+ n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d,0);
+ d+=n;
+ s2n(n,p); /* add cipher length */
+ }
+
+ /* make and send conn_id */
+ s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
+ s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
+ if (RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length) <= 0)
+ return -1;
+ memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
+ d+=SSL2_CONNECTION_ID_LENGTH;
+
+ s->state=SSL2_ST_SEND_SERVER_HELLO_B;
+ s->init_num=d-(unsigned char *)s->init_buf->data;
+ s->init_off=0;
+ }
+ /* SSL2_ST_SEND_SERVER_HELLO_B */
+ /* If we are using TCP/IP, the performance is bad if we do 2
+ * writes without a read between them. This occurs when
+ * Session-id reuse is used, so I will put in a buffering module
+ */
+ if (s->hit)
+ {
+ if (!ssl_init_wbio_buffer(s,1)) return(-1);
+ }
+
+ return(ssl2_do_write(s));
+ }
+
+static int get_client_finished(SSL *s)
+ {
+ unsigned char *p;
+ int i, n;
+ unsigned long len;
+
+ p=(unsigned char *)s->init_buf->data;
+ if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
+ {
+ i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
+ if (i < 1-s->init_num)
+ return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
+ s->init_num += i;
+
+ if (*p != SSL2_MT_CLIENT_FINISHED)
+ {
+ if (*p != SSL2_MT_ERROR)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
+ }
+ else
+ {
+ SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
+ /* try to read the error message */
+ i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
+ return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
+ }
+ return(-1);
+ }
+ s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
+ }
+
+ /* SSL2_ST_GET_CLIENT_FINISHED_B */
+ if (s->s2->conn_id_length > sizeof s->s2->conn_id)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ len = 1 + (unsigned long)s->s2->conn_id_length;
+ n = (int)len - s->init_num;
+ i = ssl2_read(s,(char *)&(p[s->init_num]),n);
+ if (i < n)
+ {
+ return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
+ }
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
+ p += 1;
+ if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0)
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
+ return(-1);
+ }
+ return(1);
+ }
+
+static int server_verify(SSL *s)
+ {
+ unsigned char *p;
+
+ if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
+ {
+ p=(unsigned char *)s->init_buf->data;
+ *(p++)=SSL2_MT_SERVER_VERIFY;
+ if (s->s2->challenge_length > sizeof s->s2->challenge)
+ {
+ SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
+ /* p+=s->s2->challenge_length; */
+
+ s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
+ s->init_num=s->s2->challenge_length+1;
+ s->init_off=0;
+ }
+ return(ssl2_do_write(s));
+ }
+
+static int server_finish(SSL *s)
+ {
+ unsigned char *p;
+
+ if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
+ {
+ p=(unsigned char *)s->init_buf->data;
+ *(p++)=SSL2_MT_SERVER_FINISHED;
+
+ if (s->session->session_id_length > sizeof s->session->session_id)
+ {
+ SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
+ /* p+=s->session->session_id_length; */
+
+ s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
+ s->init_num=s->session->session_id_length+1;
+ s->init_off=0;
+ }
+
+ /* SSL2_ST_SEND_SERVER_FINISHED_B */
+ return(ssl2_do_write(s));
+ }
+
+/* send the request and check the response */
+static int request_certificate(SSL *s)
+ {
+ const unsigned char *cp;
+ unsigned char *p,*p2,*buf2;
+ unsigned char *ccd;
+ int i,j,ctype,ret= -1;
+ unsigned long len;
+ X509 *x509=NULL;
+ STACK_OF(X509) *sk=NULL;
+
+ ccd=s->s2->tmp.ccl;
+ if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
+ {
+ p=(unsigned char *)s->init_buf->data;
+ *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
+ *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
+ if (RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0)
+ return -1;
+ memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
+
+ s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
+ s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
+ s->init_off=0;
+ }
+
+ if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
+ {
+ i=ssl2_do_write(s);
+ if (i <= 0)
+ {
+ ret=i;
+ goto end;
+ }
+
+ s->init_num=0;
+ s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
+ }
+
+ if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
+ {
+ p=(unsigned char *)s->init_buf->data;
+ i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
+ if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
+ * (probably NO-CERTIFICATE-ERROR) */
+ {
+ ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
+ goto end;
+ }
+ s->init_num += i;
+
+ if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
+ {
+ n2s(p,i);
+ if (i != SSL2_PE_NO_CERTIFICATE)
+ {
+ /* not the error message we expected -- let ssl2_part_read handle it */
+ s->init_num -= 3;
+ ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
+ goto end;
+ }
+
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
+
+ /* this is the one place where we can recover from an SSL 2.0 error */
+
+ if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
+ {
+ ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
+ goto end;
+ }
+ ret=1;
+ goto end;
+ }
+ if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
+ {
+ ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
+ goto end;
+ }
+ if (s->init_num != 6)
+ {
+ SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
+ goto end;
+ }
+
+ /* ok we have a response */
+ /* certificate type, there is only one right now. */
+ ctype= *(p++);
+ if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
+ {
+ ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
+ goto end;
+ }
+ n2s(p,i); s->s2->tmp.clen=i;
+ n2s(p,i); s->s2->tmp.rlen=i;
+ s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
+ }
+
+ /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
+ p=(unsigned char *)s->init_buf->data;
+ len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
+ if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
+ {
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
+ goto end;
+ }
+ j = (int)len - s->init_num;
+ i = ssl2_read(s,(char *)&(p[s->init_num]),j);
+ if (i < j)
+ {
+ ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
+ goto end;
+ }
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
+ p += 6;
+
+ cp = p;
+ x509=(X509 *)d2i_X509(NULL,&cp,(long)s->s2->tmp.clen);
+ if (x509 == NULL)
+ {
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
+ goto msg_end;
+ }
+
+ if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
+ {
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
+ goto msg_end;
+ }
+
+ i=ssl_verify_cert_chain(s,sk);
+
+ if (i > 0) /* we like the packet, now check the chksum */
+ {
+ EVP_MD_CTX ctx;
+ EVP_PKEY *pkey=NULL;
+
+ EVP_MD_CTX_init(&ctx);
+ if (!EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL)
+ || !EVP_VerifyUpdate(&ctx,s->s2->key_material,
+ s->s2->key_material_length)
+ || !EVP_VerifyUpdate(&ctx,ccd,
+ SSL2_MIN_CERT_CHALLENGE_LENGTH))
+ goto msg_end;
+
+ i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
+ buf2=OPENSSL_malloc((unsigned int)i);
+ if (buf2 == NULL)
+ {
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
+ goto msg_end;
+ }
+ p2=buf2;
+ i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
+ if (!EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i))
+ {
+ OPENSSL_free(buf2);
+ goto msg_end;
+ }
+ OPENSSL_free(buf2);
+
+ pkey=X509_get_pubkey(x509);
+ if (pkey == NULL) goto end;
+ i=EVP_VerifyFinal(&ctx,cp,s->s2->tmp.rlen,pkey);
+ EVP_PKEY_free(pkey);
+ EVP_MD_CTX_cleanup(&ctx);
+
+ if (i > 0)
+ {
+ if (s->session->peer != NULL)
+ X509_free(s->session->peer);
+ s->session->peer=x509;
+ CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
+ s->session->verify_result = s->verify_result;
+ ret=1;
+ goto end;
+ }
+ else
+ {
+ SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
+ goto msg_end;
+ }
+ }
+ else
+ {
+msg_end:
+ ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
+ }
+end:
+ sk_X509_free(sk);
+ X509_free(x509);
+ return(ret);
+ }
+
+static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
+ unsigned char *to, int padding)
+ {
+ RSA *rsa;
+ int i;
+
+ if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
+ {
+ SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
+ return(-1);
+ }
+ if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
+ {
+ SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
+ return(-1);
+ }
+ rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
+
+ /* we have the public key */
+ i=RSA_private_decrypt(len,from,to,rsa,padding);
+ if (i < 0)
+ SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
+ return(i);
+ }
+#else /* !OPENSSL_NO_SSL2 */
+
+# if PEDANTIC
+static void *dummy=&dummy;
+# endif
+
+#endif
projects / cassiopeia.git / blobdiff