--- /dev/null
+/* crypto/evp/e_des.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 <stdio.h>
+#include "cryptlib.h"
+#ifndef OPENSSL_NO_DES
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include "evp_locl.h"
+#include <openssl/des.h>
+#include <openssl/rand.h>
+
+static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc);
+static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
+
+/* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */
+
+static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ BLOCK_CIPHER_ecb_loop()
+ DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt);
+ return 1;
+}
+
+static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ while(inl>=EVP_MAXCHUNK)
+ {
+ DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
+ (DES_cblock *)ctx->iv, &ctx->num);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
+ (DES_cblock *)ctx->iv, &ctx->num);
+ return 1;
+}
+
+static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ while(inl>=EVP_MAXCHUNK)
+ {
+ DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
+ (DES_cblock *)ctx->iv, ctx->encrypt);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
+ (DES_cblock *)ctx->iv, ctx->encrypt);
+ return 1;
+}
+
+static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ while(inl>=EVP_MAXCHUNK)
+ {
+ DES_cfb64_encrypt(in,out, (long)EVP_MAXCHUNK, ctx->cipher_data,
+ (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
+ (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
+ return 1;
+}
+
+/* Although we have a CFB-r implementation for DES, it doesn't pack the right
+ way, so wrap it here */
+static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+ {
+ size_t n,chunk=EVP_MAXCHUNK/8;
+ unsigned char c[1],d[1];
+
+ if (inl<chunk) chunk=inl;
+
+ while (inl && inl>=chunk)
+ {
+ for(n=0 ; n < chunk*8; ++n)
+ {
+ c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
+ DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv,
+ ctx->encrypt);
+ out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
+ ((d[0]&0x80) >> (unsigned int)(n%8));
+ }
+ inl-=chunk;
+ in +=chunk;
+ out+=chunk;
+ if (inl<chunk) chunk=inl;
+ }
+
+ return 1;
+ }
+
+static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+ {
+ while (inl>=EVP_MAXCHUNK)
+ {
+ DES_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,ctx->cipher_data,
+ (DES_cblock *)ctx->iv,ctx->encrypt);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_cfb_encrypt(in,out,8,(long)inl,ctx->cipher_data,
+ (DES_cblock *)ctx->iv,ctx->encrypt);
+ return 1;
+ }
+
+BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64,
+ EVP_CIPH_RAND_KEY, des_init_key, NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,
+ des_ctrl)
+
+BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1,
+ EVP_CIPH_RAND_KEY, des_init_key,NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,des_ctrl)
+
+BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8,
+ EVP_CIPH_RAND_KEY,des_init_key,NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,des_ctrl)
+
+static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+ {
+ DES_cblock *deskey = (DES_cblock *)key;
+#ifdef EVP_CHECK_DES_KEY
+ if(DES_set_key_checked(deskey,ctx->cipher_data) != 0)
+ return 0;
+#else
+ DES_set_key_unchecked(deskey,ctx->cipher_data);
+#endif
+ return 1;
+ }
+
+static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+ {
+
+ switch(type)
+ {
+ case EVP_CTRL_RAND_KEY:
+ if (RAND_bytes(ptr, 8) <= 0)
+ return 0;
+ DES_set_odd_parity((DES_cblock *)ptr);
+ return 1;
+
+ default:
+ return -1;
+ }
+ }
+
+#endif
projects / cassiopeia.git / blobdiff