diff options
Diffstat (limited to 'openssl/ssl/d1_enc.c')
| -rw-r--r-- | openssl/ssl/d1_enc.c | 582 |
1 files changed, 289 insertions, 293 deletions
diff --git a/openssl/ssl/d1_enc.c b/openssl/ssl/d1_enc.c index 8fa57347a..d762dc5c5 100644 --- a/openssl/ssl/d1_enc.c +++ b/openssl/ssl/d1_enc.c @@ -1,293 +1,289 @@ -/* ssl/d1_enc.c */ -/* - * DTLS implementation written by Nagendra Modadugu - * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. - */ -/* ==================================================================== - * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * openssl-core@openssl.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.openssl.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). - * - */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ - -#include <stdio.h> -#include "ssl_locl.h" -#ifndef OPENSSL_NO_COMP -#include <openssl/comp.h> -#endif -#include <openssl/evp.h> -#include <openssl/hmac.h> -#include <openssl/md5.h> -#include <openssl/rand.h> -#ifdef KSSL_DEBUG -#include <openssl/des.h> -#endif - -int dtls1_enc(SSL *s, int send) - { - SSL3_RECORD *rec; - EVP_CIPHER_CTX *ds; - unsigned long l; - int bs,i,ii,j,k,n=0; - const EVP_CIPHER *enc; - - if (send) - { - if (EVP_MD_CTX_md(s->write_hash)) - { - n=EVP_MD_CTX_size(s->write_hash); - if (n < 0) - return -1; - } - 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); - if ( rec->data != rec->input) - /* we can't write into the input stream */ - fprintf(stderr, "%s:%d: rec->data != rec->input\n", - __FILE__, __LINE__); - else if ( EVP_CIPHER_block_size(ds->cipher) > 1) - { - if (RAND_bytes(rec->input, EVP_CIPHER_block_size(ds->cipher)) <= 0) - return -1; - } - } - } - else - { - if (EVP_MD_CTX_md(s->read_hash)) - { - n=EVP_MD_CTX_size(s->read_hash); - if (n < 0) - return -1; - } - 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); - } - -#ifdef KSSL_DEBUG - printf("dtls1_enc(%d)\n", send); -#endif /* KSSL_DEBUG */ - - 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); - - if ((bs != 1) && send) - { - i=bs-((int)l%bs); - - /* Add weird padding of upto 256 bytes */ - - /* we need to add 'i' padding bytes of value j */ - j=i-1; - if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) - { - if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) - j++; - } - for (k=(int)l; k<(int)(l+i); k++) - rec->input[k]=j; - l+=i; - rec->length+=i; - } - -#ifdef KSSL_DEBUG - { - unsigned long ui; - printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", - ds,rec->data,rec->input,l); - printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", - ds->buf_len, ds->cipher->key_len, - DES_KEY_SZ, DES_SCHEDULE_SZ, - ds->cipher->iv_len); - printf("\t\tIV: "); - for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); - printf("\n"); - printf("\trec->input="); - for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); - printf("\n"); - } -#endif /* KSSL_DEBUG */ - - if (!send) - { - if (l == 0 || l%bs != 0) - { - SSLerr(SSL_F_DTLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); - ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); - return 0; - } - } - - EVP_Cipher(ds,rec->data,rec->input,l); - -#ifdef KSSL_DEBUG - { - unsigned long i; - printf("\trec->data="); - for (i=0; i<l; i++) - printf(" %02x", rec->data[i]); printf("\n"); - } -#endif /* KSSL_DEBUG */ - - if ((bs != 1) && !send) - { - ii=i=rec->data[l-1]; /* padding_length */ - i++; - if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) - { - /* First packet is even in size, so check */ - if ((memcmp(s->s3->read_sequence, - "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) - s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; - if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) - i--; - } - /* TLS 1.0 does not bound the number of padding bytes by the block size. - * All of them must have value 'padding_length'. */ - if (i > (int)rec->length) - { - /* Incorrect padding. SSLerr() and ssl3_alert are done - * by caller: we don't want to reveal whether this is - * a decryption error or a MAC verification failure - * (see http://www.openssl.org/~bodo/tls-cbc.txt) - */ - return -1; - } - for (j=(int)(l-i); j<(int)l; j++) - { - if (rec->data[j] != ii) - { - /* Incorrect padding */ - return -1; - } - } - rec->length-=i; - - rec->data += bs; /* skip the implicit IV */ - rec->input += bs; - rec->length -= bs; - } - } - return(1); - } - +/* ssl/d1_enc.c */
+/*
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "ssl_locl.h"
+#ifndef OPENSSL_NO_COMP
+#include <openssl/comp.h>
+#endif
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+#include <openssl/md5.h>
+#include <openssl/rand.h>
+#ifdef KSSL_DEBUG
+#include <openssl/des.h>
+#endif
+
+int dtls1_enc(SSL *s, int send)
+ {
+ SSL3_RECORD *rec;
+ EVP_CIPHER_CTX *ds;
+ unsigned long l;
+ int bs,i,ii,j,k,n=0;
+ const EVP_CIPHER *enc;
+
+ if (send)
+ {
+ if (EVP_MD_CTX_md(s->write_hash))
+ {
+ n=EVP_MD_CTX_size(s->write_hash);
+ if (n < 0)
+ return -1;
+ }
+ 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);
+ if ( rec->data != rec->input)
+ /* we can't write into the input stream */
+ fprintf(stderr, "%s:%d: rec->data != rec->input\n",
+ __FILE__, __LINE__);
+ else if ( EVP_CIPHER_block_size(ds->cipher) > 1)
+ {
+ if (RAND_bytes(rec->input, EVP_CIPHER_block_size(ds->cipher)) <= 0)
+ return -1;
+ }
+ }
+ }
+ else
+ {
+ if (EVP_MD_CTX_md(s->read_hash))
+ {
+ n=EVP_MD_CTX_size(s->read_hash);
+ if (n < 0)
+ return -1;
+ }
+ 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);
+ }
+
+#ifdef KSSL_DEBUG
+ printf("dtls1_enc(%d)\n", send);
+#endif /* KSSL_DEBUG */
+
+ 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);
+
+ if ((bs != 1) && send)
+ {
+ i=bs-((int)l%bs);
+
+ /* Add weird padding of upto 256 bytes */
+
+ /* we need to add 'i' padding bytes of value j */
+ j=i-1;
+ if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
+ {
+ if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
+ j++;
+ }
+ for (k=(int)l; k<(int)(l+i); k++)
+ rec->input[k]=j;
+ l+=i;
+ rec->length+=i;
+ }
+
+#ifdef KSSL_DEBUG
+ {
+ unsigned long ui;
+ printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
+ ds,rec->data,rec->input,l);
+ printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
+ ds->buf_len, ds->cipher->key_len,
+ DES_KEY_SZ, DES_SCHEDULE_SZ,
+ ds->cipher->iv_len);
+ printf("\t\tIV: ");
+ for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
+ printf("\n");
+ printf("\trec->input=");
+ for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
+ printf("\n");
+ }
+#endif /* KSSL_DEBUG */
+
+ if (!send)
+ {
+ if (l == 0 || l%bs != 0)
+ return -1;
+ }
+
+ EVP_Cipher(ds,rec->data,rec->input,l);
+
+#ifdef KSSL_DEBUG
+ {
+ unsigned long i;
+ printf("\trec->data=");
+ for (i=0; i<l; i++)
+ printf(" %02x", rec->data[i]); printf("\n");
+ }
+#endif /* KSSL_DEBUG */
+
+ if ((bs != 1) && !send)
+ {
+ ii=i=rec->data[l-1]; /* padding_length */
+ i++;
+ if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
+ {
+ /* First packet is even in size, so check */
+ if ((memcmp(s->s3->read_sequence,
+ "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
+ s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
+ if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
+ i--;
+ }
+ /* TLS 1.0 does not bound the number of padding bytes by the block size.
+ * All of them must have value 'padding_length'. */
+ if (i > (int)rec->length)
+ {
+ /* Incorrect padding. SSLerr() and ssl3_alert are done
+ * by caller: we don't want to reveal whether this is
+ * a decryption error or a MAC verification failure
+ * (see http://www.openssl.org/~bodo/tls-cbc.txt)
+ */
+ return -1;
+ }
+ for (j=(int)(l-i); j<(int)l; j++)
+ {
+ if (rec->data[j] != ii)
+ {
+ /* Incorrect padding */
+ return -1;
+ }
+ }
+ rec->length-=i;
+
+ rec->data += bs; /* skip the implicit IV */
+ rec->input += bs;
+ rec->length -= bs;
+ }
+ }
+ return(1);
+ }
+
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