--- /dev/null
+/* ssl/s3_enc.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) 1998-2007 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE.
+ */
+
+#include <stdio.h>
+#include "ssl_locl.h"
+#include <openssl/evp.h>
+#include <openssl/md5.h>
+
+static unsigned char ssl3_pad_1[48]={
+ 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
+ 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
+ 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
+ 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
+ 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
+ 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
+
+static unsigned char ssl3_pad_2[48]={
+ 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
+ 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
+ 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
+ 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
+ 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
+ 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
+static int ssl3_handshake_mac(SSL *s, int md_nid,
+ const char *sender, int len, unsigned char *p);
+static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
+ {
+ EVP_MD_CTX m5;
+ EVP_MD_CTX s1;
+ unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
+ unsigned char c='A';
+ unsigned int i,j,k;
+
+#ifdef CHARSET_EBCDIC
+ c = os_toascii[c]; /*'A' in ASCII */
+#endif
+ k=0;
+ EVP_MD_CTX_init(&m5);
+ EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+ EVP_MD_CTX_init(&s1);
+ for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
+ {
+ k++;
+ if (k > sizeof buf)
+ {
+ /* bug: 'buf' is too small for this ciphersuite */
+ SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ for (j=0; j<k; j++)
+ buf[j]=c;
+ c++;
+ EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
+ EVP_DigestUpdate(&s1,buf,k);
+ EVP_DigestUpdate(&s1,s->session->master_key,
+ s->session->master_key_length);
+ EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
+ EVP_DigestFinal_ex(&s1,smd,NULL);
+
+ EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
+ EVP_DigestUpdate(&m5,s->session->master_key,
+ s->session->master_key_length);
+ EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
+ if ((int)(i+MD5_DIGEST_LENGTH) > num)
+ {
+ EVP_DigestFinal_ex(&m5,smd,NULL);
+ memcpy(km,smd,(num-i));
+ }
+ else
+ EVP_DigestFinal_ex(&m5,km,NULL);
+
+ km+=MD5_DIGEST_LENGTH;
+ }
+ OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
+ EVP_MD_CTX_cleanup(&m5);
+ EVP_MD_CTX_cleanup(&s1);
+ return 1;
+ }
+
+int ssl3_change_cipher_state(SSL *s, int which)
+ {
+ unsigned char *p,*mac_secret;
+ unsigned char exp_key[EVP_MAX_KEY_LENGTH];
+ unsigned char exp_iv[EVP_MAX_IV_LENGTH];
+ unsigned char *ms,*key,*iv,*er1,*er2;
+ EVP_CIPHER_CTX *dd;
+ const EVP_CIPHER *c;
+#ifndef OPENSSL_NO_COMP
+ COMP_METHOD *comp;
+#endif
+ const EVP_MD *m;
+ EVP_MD_CTX md;
+ int is_exp,n,i,j,k,cl;
+ int reuse_dd = 0;
+
+ is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
+ c=s->s3->tmp.new_sym_enc;
+ m=s->s3->tmp.new_hash;
+ /* m == NULL will lead to a crash later */
+ OPENSSL_assert(m);
+#ifndef OPENSSL_NO_COMP
+ if (s->s3->tmp.new_compression == NULL)
+ comp=NULL;
+ else
+ comp=s->s3->tmp.new_compression->method;
+#endif
+
+ if (which & SSL3_CC_READ)
+ {
+ if (s->enc_read_ctx != NULL)
+ reuse_dd = 1;
+ else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
+ goto err;
+ else
+ /* make sure it's intialized in case we exit later with an error */
+ EVP_CIPHER_CTX_init(s->enc_read_ctx);
+ dd= s->enc_read_ctx;
+
+ ssl_replace_hash(&s->read_hash,m);
+#ifndef OPENSSL_NO_COMP
+ /* COMPRESS */
+ if (s->expand != NULL)
+ {
+ COMP_CTX_free(s->expand);
+ s->expand=NULL;
+ }
+ if (comp != NULL)
+ {
+ s->expand=COMP_CTX_new(comp);
+ if (s->expand == NULL)
+ {
+ SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
+ goto err2;
+ }
+ if (s->s3->rrec.comp == NULL)
+ s->s3->rrec.comp=(unsigned char *)
+ OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
+ if (s->s3->rrec.comp == NULL)
+ goto err;
+ }
+#endif
+ memset(&(s->s3->read_sequence[0]),0,8);
+ mac_secret= &(s->s3->read_mac_secret[0]);
+ }
+ else
+ {
+ if (s->enc_write_ctx != NULL)
+ reuse_dd = 1;
+ else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
+ goto err;
+ else
+ /* make sure it's intialized in case we exit later with an error */
+ EVP_CIPHER_CTX_init(s->enc_write_ctx);
+ dd= s->enc_write_ctx;
+ ssl_replace_hash(&s->write_hash,m);
+#ifndef OPENSSL_NO_COMP
+ /* COMPRESS */
+ if (s->compress != NULL)
+ {
+ COMP_CTX_free(s->compress);
+ s->compress=NULL;
+ }
+ if (comp != NULL)
+ {
+ s->compress=COMP_CTX_new(comp);
+ if (s->compress == NULL)
+ {
+ SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
+ goto err2;
+ }
+ }
+#endif
+ memset(&(s->s3->write_sequence[0]),0,8);
+ mac_secret= &(s->s3->write_mac_secret[0]);
+ }
+
+ if (reuse_dd)
+ EVP_CIPHER_CTX_cleanup(dd);
+
+ p=s->s3->tmp.key_block;
+ i=EVP_MD_size(m);
+ if (i < 0)
+ goto err2;
+ cl=EVP_CIPHER_key_length(c);
+ j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
+ cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
+ /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
+ k=EVP_CIPHER_iv_length(c);
+ if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
+ (which == SSL3_CHANGE_CIPHER_SERVER_READ))
+ {
+ ms= &(p[ 0]); n=i+i;
+ key= &(p[ n]); n+=j+j;
+ iv= &(p[ n]); n+=k+k;
+ er1= &(s->s3->client_random[0]);
+ er2= &(s->s3->server_random[0]);
+ }
+ else
+ {
+ n=i;
+ ms= &(p[ n]); n+=i+j;
+ key= &(p[ n]); n+=j+k;
+ iv= &(p[ n]); n+=k;
+ er1= &(s->s3->server_random[0]);
+ er2= &(s->s3->client_random[0]);
+ }
+
+ if (n > s->s3->tmp.key_block_length)
+ {
+ SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
+ goto err2;
+ }
+
+ EVP_MD_CTX_init(&md);
+ memcpy(mac_secret,ms,i);
+ if (is_exp)
+ {
+ /* In here I set both the read and write key/iv to the
+ * same value since only the correct one will be used :-).
+ */
+ EVP_DigestInit_ex(&md,EVP_md5(), NULL);
+ EVP_DigestUpdate(&md,key,j);
+ EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
+ EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
+ key= &(exp_key[0]);
+
+ if (k > 0)
+ {
+ EVP_DigestInit_ex(&md,EVP_md5(), NULL);
+ EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
+ EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
+ iv= &(exp_iv[0]);
+ }
+ }
+
+ s->session->key_arg_length=0;
+
+ EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
+
+ OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
+ OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
+ EVP_MD_CTX_cleanup(&md);
+ return(1);
+err:
+ SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
+err2:
+ return(0);
+ }
+
+int ssl3_setup_key_block(SSL *s)
+ {
+ unsigned char *p;
+ const EVP_CIPHER *c;
+ const EVP_MD *hash;
+ int num;
+ int ret = 0;
+ SSL_COMP *comp;
+
+ if (s->s3->tmp.key_block_length != 0)
+ return(1);
+
+ if (!ssl_cipher_get_evp(s->session,&c,&hash,NULL,NULL,&comp))
+ {
+ SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
+ return(0);
+ }
+
+ s->s3->tmp.new_sym_enc=c;
+ s->s3->tmp.new_hash=hash;
+#ifdef OPENSSL_NO_COMP
+ s->s3->tmp.new_compression=NULL;
+#else
+ s->s3->tmp.new_compression=comp;
+#endif
+
+ num=EVP_MD_size(hash);
+ if (num < 0)
+ return 0;
+
+ num=EVP_CIPHER_key_length(c)+num+EVP_CIPHER_iv_length(c);
+ num*=2;
+
+ ssl3_cleanup_key_block(s);
+
+ if ((p=OPENSSL_malloc(num)) == NULL)
+ goto err;
+
+ s->s3->tmp.key_block_length=num;
+ s->s3->tmp.key_block=p;
+
+ ret = ssl3_generate_key_block(s,p,num);
+
+ if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
+ {
+ /* enable vulnerability countermeasure for CBC ciphers with
+ * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
+ */
+ s->s3->need_empty_fragments = 1;
+
+ if (s->session->cipher != NULL)
+ {
+ if (s->session->cipher->algorithm_enc == SSL_eNULL)
+ s->s3->need_empty_fragments = 0;
+
+#ifndef OPENSSL_NO_RC4
+ if (s->session->cipher->algorithm_enc == SSL_RC4)
+ s->s3->need_empty_fragments = 0;
+#endif
+ }
+ }
+
+ return ret;
+
+err:
+ SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+
+void ssl3_cleanup_key_block(SSL *s)
+ {
+ if (s->s3->tmp.key_block != NULL)
+ {
+ OPENSSL_cleanse(s->s3->tmp.key_block,
+ s->s3->tmp.key_block_length);
+ OPENSSL_free(s->s3->tmp.key_block);
+ s->s3->tmp.key_block=NULL;
+ }
+ s->s3->tmp.key_block_length=0;
+ }
+
+/* ssl3_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
+ *
+ * Returns:
+ * 0: (in non-constant time) if the record is publically invalid (i.e. too
+ * short etc).
+ * 1: if the record's padding is valid / the encryption was successful.
+ * -1: if the record's padding is invalid or, if sending, an internal error
+ * occured.
+ */
+int ssl3_enc(SSL *s, int send)
+ {
+ SSL3_RECORD *rec;
+ EVP_CIPHER_CTX *ds;
+ unsigned long l;
+ int bs,i,mac_size=0;
+ const EVP_CIPHER *enc;
+
+ if (send)
+ {
+ ds=s->enc_write_ctx;
+ rec= &(s->s3->wrec);
+ if (s->enc_write_ctx == NULL)
+ enc=NULL;
+ else
+ enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
+ }
+ else
+ {
+ ds=s->enc_read_ctx;
+ rec= &(s->s3->rrec);
+ if (s->enc_read_ctx == NULL)
+ enc=NULL;
+ else
+ enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
+ }
+
+ if ((s->session == NULL) || (ds == NULL) ||
+ (enc == NULL))
+ {
+ memmove(rec->data,rec->input,rec->length);
+ rec->input=rec->data;
+ }
+ else
+ {
+ l=rec->length;
+ bs=EVP_CIPHER_block_size(ds->cipher);
+
+ /* COMPRESS */
+
+ if ((bs != 1) && send)
+ {
+ i=bs-((int)l%bs);
+
+ /* we need to add 'i-1' padding bytes */
+ l+=i;
+ /* the last of these zero bytes will be overwritten
+ * with the padding length. */
+ memset(&rec->input[rec->length], 0, i);
+ rec->length+=i;
+ rec->input[l-1]=(i-1);
+ }
+
+ if (!send)
+ {
+ if (l == 0 || l%bs != 0)
+ return 0;
+ /* otherwise, rec->length >= bs */
+ }
+
+ EVP_Cipher(ds,rec->data,rec->input,l);
+
+ if (EVP_MD_CTX_md(s->read_hash) != NULL)
+ mac_size = EVP_MD_CTX_size(s->read_hash);
+ if ((bs != 1) && !send)
+ return ssl3_cbc_remove_padding(s, rec, bs, mac_size);
+ }
+ return(1);
+ }
+
+void ssl3_init_finished_mac(SSL *s)
+ {
+ if (s->s3->handshake_buffer) BIO_free(s->s3->handshake_buffer);
+ if (s->s3->handshake_dgst) ssl3_free_digest_list(s);
+ s->s3->handshake_buffer=BIO_new(BIO_s_mem());
+ (void)BIO_set_close(s->s3->handshake_buffer,BIO_CLOSE);
+ }
+
+void ssl3_free_digest_list(SSL *s)
+ {
+ int i;
+ if (!s->s3->handshake_dgst) return;
+ for (i=0;i<SSL_MAX_DIGEST;i++)
+ {
+ if (s->s3->handshake_dgst[i])
+ EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]);
+ }
+ OPENSSL_free(s->s3->handshake_dgst);
+ s->s3->handshake_dgst=NULL;
+ }
+
+
+
+void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
+ {
+ if (s->s3->handshake_buffer && !(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE))
+ {
+ BIO_write (s->s3->handshake_buffer,(void *)buf,len);
+ }
+ else
+ {
+ int i;
+ for (i=0;i< SSL_MAX_DIGEST;i++)
+ {
+ if (s->s3->handshake_dgst[i]!= NULL)
+ EVP_DigestUpdate(s->s3->handshake_dgst[i],buf,len);
+ }
+ }
+ }
+
+int ssl3_digest_cached_records(SSL *s)
+ {
+ int i;
+ long mask;
+ const EVP_MD *md;
+ long hdatalen;
+ void *hdata;
+
+ /* Allocate handshake_dgst array */
+ ssl3_free_digest_list(s);
+ s->s3->handshake_dgst = OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
+ memset(s->s3->handshake_dgst,0,SSL_MAX_DIGEST *sizeof(EVP_MD_CTX *));
+ hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,&hdata);
+ if (hdatalen <= 0)
+ {
+ SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
+ return 0;
+ }
+
+ /* Loop through bitso of algorithm2 field and create MD_CTX-es */
+ for (i=0;ssl_get_handshake_digest(i,&mask,&md); i++)
+ {
+ if ((mask & ssl_get_algorithm2(s)) && md)
+ {
+ s->s3->handshake_dgst[i]=EVP_MD_CTX_create();
+#ifdef OPENSSL_FIPS
+ if (EVP_MD_nid(md) == NID_md5)
+ {
+ EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i],
+ EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+ }
+#endif
+ EVP_DigestInit_ex(s->s3->handshake_dgst[i],md,NULL);
+ EVP_DigestUpdate(s->s3->handshake_dgst[i],hdata,hdatalen);
+ }
+ else
+ {
+ s->s3->handshake_dgst[i]=NULL;
+ }
+ }
+ if (!(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE))
+ {
+ /* Free handshake_buffer BIO */
+ BIO_free(s->s3->handshake_buffer);
+ s->s3->handshake_buffer = NULL;
+ }
+
+ return 1;
+ }
+
+int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p)
+ {
+ return(ssl3_handshake_mac(s,md_nid,NULL,0,p));
+ }
+int ssl3_final_finish_mac(SSL *s,
+ const char *sender, int len, unsigned char *p)
+ {
+ int ret, sha1len;
+ ret=ssl3_handshake_mac(s,NID_md5,sender,len,p);
+ if(ret == 0)
+ return 0;
+
+ p+=ret;
+
+ sha1len=ssl3_handshake_mac(s,NID_sha1,sender,len,p);
+ if(sha1len == 0)
+ return 0;
+
+ ret+=sha1len;
+ return(ret);
+ }
+static int ssl3_handshake_mac(SSL *s, int md_nid,
+ const char *sender, int len, unsigned char *p)
+ {
+ unsigned int ret;
+ int npad,n;
+ unsigned int i;
+ unsigned char md_buf[EVP_MAX_MD_SIZE];
+ EVP_MD_CTX ctx,*d=NULL;
+
+ if (s->s3->handshake_buffer)
+ if (!ssl3_digest_cached_records(s))
+ return 0;
+
+ /* Search for digest of specified type in the handshake_dgst
+ * array*/
+ for (i=0;i<SSL_MAX_DIGEST;i++)
+ {
+ if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
+ {
+ d=s->s3->handshake_dgst[i];
+ break;
+ }
+ }
+ if (!d) {
+ SSLerr(SSL_F_SSL3_HANDSHAKE_MAC,SSL_R_NO_REQUIRED_DIGEST);
+ return 0;
+ }
+ EVP_MD_CTX_init(&ctx);
+ EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+ EVP_MD_CTX_copy_ex(&ctx,d);
+ n=EVP_MD_CTX_size(&ctx);
+ if (n < 0)
+ return 0;
+
+ npad=(48/n)*n;
+ if (sender != NULL)
+ EVP_DigestUpdate(&ctx,sender,len);
+ EVP_DigestUpdate(&ctx,s->session->master_key,
+ s->session->master_key_length);
+ EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
+ EVP_DigestFinal_ex(&ctx,md_buf,&i);
+
+ EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
+ EVP_DigestUpdate(&ctx,s->session->master_key,
+ s->session->master_key_length);
+ EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
+ EVP_DigestUpdate(&ctx,md_buf,i);
+ EVP_DigestFinal_ex(&ctx,p,&ret);
+
+ EVP_MD_CTX_cleanup(&ctx);
+
+ return((int)ret);
+ }
+
+int n_ssl3_mac(SSL *ssl, unsigned char *md, int send)
+ {
+ SSL3_RECORD *rec;
+ unsigned char *mac_sec,*seq;
+ EVP_MD_CTX md_ctx;
+ const EVP_MD_CTX *hash;
+ unsigned char *p,rec_char;
+ size_t md_size, orig_len;
+ int npad;
+ int t;
+
+ if (send)
+ {
+ rec= &(ssl->s3->wrec);
+ mac_sec= &(ssl->s3->write_mac_secret[0]);
+ seq= &(ssl->s3->write_sequence[0]);
+ hash=ssl->write_hash;
+ }
+ else
+ {
+ rec= &(ssl->s3->rrec);
+ mac_sec= &(ssl->s3->read_mac_secret[0]);
+ seq= &(ssl->s3->read_sequence[0]);
+ hash=ssl->read_hash;
+ }
+
+ t=EVP_MD_CTX_size(hash);
+ if (t < 0)
+ return -1;
+ md_size=t;
+ npad=(48/md_size)*md_size;
+
+ /* kludge: ssl3_cbc_remove_padding passes padding length in rec->type */
+ orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
+ rec->type &= 0xff;
+
+ if (!send &&
+ EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
+ ssl3_cbc_record_digest_supported(hash))
+ {
+ /* This is a CBC-encrypted record. We must avoid leaking any
+ * timing-side channel information about how many blocks of
+ * data we are hashing because that gives an attacker a
+ * timing-oracle. */
+
+ /* npad is, at most, 48 bytes and that's with MD5:
+ * 16 + 48 + 8 (sequence bytes) + 1 + 2 = 75.
+ *
+ * With SHA-1 (the largest hash speced for SSLv3) the hash size
+ * goes up 4, but npad goes down by 8, resulting in a smaller
+ * total size. */
+ unsigned char header[75];
+ unsigned j = 0;
+ memcpy(header+j, mac_sec, md_size);
+ j += md_size;
+ memcpy(header+j, ssl3_pad_1, npad);
+ j += npad;
+ memcpy(header+j, seq, 8);
+ j += 8;
+ header[j++] = rec->type;
+ header[j++] = rec->length >> 8;
+ header[j++] = rec->length & 0xff;
+
+ ssl3_cbc_digest_record(
+ hash,
+ md, &md_size,
+ header, rec->input,
+ rec->length + md_size, orig_len,
+ mac_sec, md_size,
+ 1 /* is SSLv3 */);
+ }
+ else
+ {
+ unsigned int md_size_u;
+ /* Chop the digest off the end :-) */
+ EVP_MD_CTX_init(&md_ctx);
+
+ EVP_MD_CTX_copy_ex( &md_ctx,hash);
+ EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
+ EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
+ EVP_DigestUpdate(&md_ctx,seq,8);
+ rec_char=rec->type;
+ EVP_DigestUpdate(&md_ctx,&rec_char,1);
+ p=md;
+ s2n(rec->length,p);
+ EVP_DigestUpdate(&md_ctx,md,2);
+ EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
+ EVP_DigestFinal_ex( &md_ctx,md,NULL);
+
+ EVP_MD_CTX_copy_ex( &md_ctx,hash);
+ EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
+ EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
+ EVP_DigestUpdate(&md_ctx,md,md_size);
+ EVP_DigestFinal_ex( &md_ctx,md,&md_size_u);
+ md_size = md_size_u;
+
+ EVP_MD_CTX_cleanup(&md_ctx);
+ }
+
+ ssl3_record_sequence_update(seq);
+ return(md_size);
+ }
+
+void ssl3_record_sequence_update(unsigned char *seq)
+ {
+ int i;
+
+ for (i=7; i>=0; i--)
+ {
+ ++seq[i];
+ if (seq[i] != 0) break;
+ }
+ }
+
+int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
+ int len)
+ {
+ static const unsigned char *salt[3]={
+#ifndef CHARSET_EBCDIC
+ (const unsigned char *)"A",
+ (const unsigned char *)"BB",
+ (const unsigned char *)"CCC",
+#else
+ (const unsigned char *)"\x41",
+ (const unsigned char *)"\x42\x42",
+ (const unsigned char *)"\x43\x43\x43",
+#endif
+ };
+ unsigned char buf[EVP_MAX_MD_SIZE];
+ EVP_MD_CTX ctx;
+ int i,ret=0;
+ unsigned int n;
+
+ EVP_MD_CTX_init(&ctx);
+ for (i=0; i<3; i++)
+ {
+ EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
+ EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
+ EVP_DigestUpdate(&ctx,p,len);
+ EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_DigestFinal_ex(&ctx,buf,&n);
+
+ EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
+ EVP_DigestUpdate(&ctx,p,len);
+ EVP_DigestUpdate(&ctx,buf,n);
+ EVP_DigestFinal_ex(&ctx,out,&n);
+ out+=n;
+ ret+=n;
+ }
+ EVP_MD_CTX_cleanup(&ctx);
+ return(ret);
+ }
+
+int ssl3_alert_code(int code)
+ {
+ switch (code)
+ {
+ case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
+ case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
+ case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
+ case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC);
+ case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC);
+ case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
+ case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE);
+ case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
+ case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
+ case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
+ case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
+ case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
+ case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
+ case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE);
+ case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
+ case SSL_AD_UNSUPPORTED_EXTENSION: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_UNRECOGNIZED_NAME: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(SSL3_AD_HANDSHAKE_FAILURE);
+ case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
+ case SSL_AD_INAPPROPRIATE_FALLBACK:return(TLS1_AD_INAPPROPRIATE_FALLBACK);
+ default: return(-1);
+ }
+ }
projects / cassiopeia.git / blobdiff