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+/* crypto/evp/e_des3.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_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv,int enc);
+
+static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv,int enc);
+
+static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
+
+typedef struct
+ {
+ DES_key_schedule ks1;/* key schedule */
+ DES_key_schedule ks2;/* key schedule (for ede) */
+ DES_key_schedule ks3;/* key schedule (for ede3) */
+ } DES_EDE_KEY;
+
+#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
+
+/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
+
+static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ BLOCK_CIPHER_ecb_loop()
+ DES_ecb3_encrypt((const_DES_cblock *)(in + i),
+ (DES_cblock *)(out + i),
+ &data(ctx)->ks1, &data(ctx)->ks2,
+ &data(ctx)->ks3,
+ ctx->encrypt);
+ return 1;
+}
+
+static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ if (inl>=EVP_MAXCHUNK)
+ {
+ DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
+ &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
+ (DES_cblock *)ctx->iv, &ctx->num);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_ede3_ofb64_encrypt(in, out, (long)inl,
+ &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
+ (DES_cblock *)ctx->iv, &ctx->num);
+
+ return 1;
+}
+
+static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+#ifdef KSSL_DEBUG
+ {
+ int i;
+ char *cp;
+ printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
+ printf("\t iv= ");
+ for(i=0;i<8;i++)
+ printf("%02X",ctx->iv[i]);
+ printf("\n");
+ }
+#endif /* KSSL_DEBUG */
+ if (inl>=EVP_MAXCHUNK)
+ {
+ DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
+ &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
+ (DES_cblock *)ctx->iv, ctx->encrypt);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_ede3_cbc_encrypt(in, out, (long)inl,
+ &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
+ (DES_cblock *)ctx->iv, ctx->encrypt);
+ return 1;
+}
+
+static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ if (inl>=EVP_MAXCHUNK)
+ {
+ DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
+ &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
+ (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_ede3_cfb64_encrypt(in, out, (long)inl,
+ &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
+ (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
+ return 1;
+}
+
+/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
+ way, so wrap it here */
+static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+ {
+ size_t n;
+ unsigned char c[1],d[1];
+
+ for(n=0 ; n < inl ; ++n)
+ {
+ c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
+ DES_ede3_cfb_encrypt(c,d,1,1,
+ &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
+ (DES_cblock *)ctx->iv,ctx->encrypt);
+ out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
+ ((d[0]&0x80) >> (unsigned int)(n%8));
+ }
+
+ return 1;
+ }
+
+static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+ {
+ while (inl>=EVP_MAXCHUNK)
+ {
+ DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
+ &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
+ (DES_cblock *)ctx->iv,ctx->encrypt);
+ inl-=EVP_MAXCHUNK;
+ in +=EVP_MAXCHUNK;
+ out+=EVP_MAXCHUNK;
+ }
+ if (inl)
+ DES_ede3_cfb_encrypt(in,out,8,(long)inl,
+ &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
+ (DES_cblock *)ctx->iv,ctx->encrypt);
+ return 1;
+ }
+
+BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
+ EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,
+ des3_ctrl)
+
+#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
+#define des_ede3_ofb_cipher des_ede_ofb_cipher
+#define des_ede3_cbc_cipher des_ede_cbc_cipher
+#define des_ede3_ecb_cipher des_ede_ecb_cipher
+
+BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
+ EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,
+ des3_ctrl)
+
+BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
+ EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,
+ des3_ctrl)
+
+BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
+ EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,
+ des3_ctrl)
+
+static int des_ede_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[0],&data(ctx)->ks1)
+ !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
+ return 0;
+#else
+ DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
+ DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
+#endif
+ memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
+ sizeof(data(ctx)->ks1));
+ return 1;
+ }
+
+static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+ {
+ DES_cblock *deskey = (DES_cblock *)key;
+#ifdef KSSL_DEBUG
+ {
+ int i;
+ printf("des_ede3_init_key(ctx=%lx)\n", ctx);
+ printf("\tKEY= ");
+ for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
+ printf("\t IV= ");
+ for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
+ }
+#endif /* KSSL_DEBUG */
+
+#ifdef EVP_CHECK_DES_KEY
+ if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
+ || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
+ || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
+ return 0;
+#else
+ DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
+ DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
+ DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
+#endif
+ return 1;
+ }
+
+static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+ {
+
+ DES_cblock *deskey = ptr;
+
+ switch(type)
+ {
+ case EVP_CTRL_RAND_KEY:
+ if (RAND_bytes(ptr, c->key_len) <= 0)
+ return 0;
+ DES_set_odd_parity(deskey);
+ if (c->key_len >= 16)
+ DES_set_odd_parity(deskey + 1);
+ if (c->key_len >= 24)
+ DES_set_odd_parity(deskey + 2);
+ return 1;
+
+ default:
+ return -1;
+ }
+ }
+
+const EVP_CIPHER *EVP_des_ede(void)
+{
+ return &des_ede_ecb;
+}
+
+const EVP_CIPHER *EVP_des_ede3(void)
+{
+ return &des_ede3_ecb;
+}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 13:20:49 +0000