--- /dev/null
+/* ssl/s2_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.]
+ */
+
+#include "ssl_locl.h"
+#ifndef OPENSSL_NO_SSL2
+#include <stdio.h>
+
+int ssl2_enc_init(SSL *s, int client)
+ {
+ /* Max number of bytes needed */
+ EVP_CIPHER_CTX *rs,*ws;
+ const EVP_CIPHER *c;
+ const EVP_MD *md;
+ int num;
+
+ if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL))
+ {
+ ssl2_return_error(s,SSL2_PE_NO_CIPHER);
+ SSLerr(SSL_F_SSL2_ENC_INIT,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
+ return(0);
+ }
+ ssl_replace_hash(&s->read_hash,md);
+ ssl_replace_hash(&s->write_hash,md);
+
+ if ((s->enc_read_ctx == NULL) &&
+ ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
+ OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
+ goto err;
+
+ /* make sure it's intialized in case the malloc for enc_write_ctx fails
+ * and we exit with an error */
+ rs= s->enc_read_ctx;
+ EVP_CIPHER_CTX_init(rs);
+
+ if ((s->enc_write_ctx == NULL) &&
+ ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
+ OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
+ goto err;
+
+ ws= s->enc_write_ctx;
+ EVP_CIPHER_CTX_init(ws);
+
+ num=c->key_len;
+ s->s2->key_material_length=num*2;
+ OPENSSL_assert(s->s2->key_material_length <= sizeof s->s2->key_material);
+
+ if (ssl2_generate_key_material(s) <= 0)
+ return 0;
+
+ OPENSSL_assert(c->iv_len <= (int)sizeof(s->session->key_arg));
+ EVP_EncryptInit_ex(ws,c,NULL,&(s->s2->key_material[(client)?num:0]),
+ s->session->key_arg);
+ EVP_DecryptInit_ex(rs,c,NULL,&(s->s2->key_material[(client)?0:num]),
+ s->session->key_arg);
+ s->s2->read_key= &(s->s2->key_material[(client)?0:num]);
+ s->s2->write_key= &(s->s2->key_material[(client)?num:0]);
+ return(1);
+err:
+ SSLerr(SSL_F_SSL2_ENC_INIT,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+
+/* read/writes from s->s2->mac_data using length for encrypt and
+ * decrypt. It sets s->s2->padding and s->[rw]length
+ * if we are encrypting */
+void ssl2_enc(SSL *s, int send)
+ {
+ EVP_CIPHER_CTX *ds;
+ unsigned long l;
+ int bs;
+
+ if (send)
+ {
+ ds=s->enc_write_ctx;
+ l=s->s2->wlength;
+ }
+ else
+ {
+ ds=s->enc_read_ctx;
+ l=s->s2->rlength;
+ }
+
+ /* check for NULL cipher */
+ if (ds == NULL) return;
+
+
+ bs=ds->cipher->block_size;
+ /* This should be using (bs-1) and bs instead of 7 and 8, but
+ * what the hell. */
+ if (bs == 8)
+ l=(l+7)/8*8;
+
+ EVP_Cipher(ds,s->s2->mac_data,s->s2->mac_data,l);
+ }
+
+void ssl2_mac(SSL *s, unsigned char *md, int send)
+ {
+ EVP_MD_CTX c;
+ unsigned char sequence[4],*p,*sec,*act;
+ unsigned long seq;
+ unsigned int len;
+
+ if (send)
+ {
+ seq=s->s2->write_sequence;
+ sec=s->s2->write_key;
+ len=s->s2->wact_data_length;
+ act=s->s2->wact_data;
+ }
+ else
+ {
+ seq=s->s2->read_sequence;
+ sec=s->s2->read_key;
+ len=s->s2->ract_data_length;
+ act=s->s2->ract_data;
+ }
+
+ p= &(sequence[0]);
+ l2n(seq,p);
+
+ /* There has to be a MAC algorithm. */
+ EVP_MD_CTX_init(&c);
+ EVP_MD_CTX_copy(&c, s->read_hash);
+ EVP_DigestUpdate(&c,sec,
+ EVP_CIPHER_CTX_key_length(s->enc_read_ctx));
+ EVP_DigestUpdate(&c,act,len);
+ /* the above line also does the pad data */
+ EVP_DigestUpdate(&c,sequence,4);
+ EVP_DigestFinal_ex(&c,md,NULL);
+ EVP_MD_CTX_cleanup(&c);
+ }
+#else /* !OPENSSL_NO_SSL2 */
+
+# if PEDANTIC
+static void *dummy=&dummy;
+# endif
+
+#endif
projects / cassiopeia.git / blobdiff