--- /dev/null
+/* crypto/evp/e_rc2.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_RC2
+
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include "evp_locl.h"
+#include <openssl/rc2.h>
+
+static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv,int enc);
+static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx);
+static int rc2_magic_to_meth(int i);
+static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
+static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
+static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
+
+typedef struct
+ {
+ int key_bits; /* effective key bits */
+ RC2_KEY ks; /* key schedule */
+ } EVP_RC2_KEY;
+
+#define data(ctx) ((EVP_RC2_KEY *)(ctx)->cipher_data)
+
+IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2,
+ 8,
+ RC2_KEY_LENGTH, 8, 64,
+ EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+ rc2_init_key, NULL,
+ rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv,
+ rc2_ctrl)
+
+#define RC2_40_MAGIC 0xa0
+#define RC2_64_MAGIC 0x78
+#define RC2_128_MAGIC 0x3a
+
+static const EVP_CIPHER r2_64_cbc_cipher=
+ {
+ NID_rc2_64_cbc,
+ 8,8 /* 64 bit */,8,
+ EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+ rc2_init_key,
+ rc2_cbc_cipher,
+ NULL,
+ sizeof(EVP_RC2_KEY),
+ rc2_set_asn1_type_and_iv,
+ rc2_get_asn1_type_and_iv,
+ rc2_ctrl,
+ NULL
+ };
+
+static const EVP_CIPHER r2_40_cbc_cipher=
+ {
+ NID_rc2_40_cbc,
+ 8,5 /* 40 bit */,8,
+ EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+ rc2_init_key,
+ rc2_cbc_cipher,
+ NULL,
+ sizeof(EVP_RC2_KEY),
+ rc2_set_asn1_type_and_iv,
+ rc2_get_asn1_type_and_iv,
+ rc2_ctrl,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_rc2_64_cbc(void)
+ {
+ return(&r2_64_cbc_cipher);
+ }
+
+const EVP_CIPHER *EVP_rc2_40_cbc(void)
+ {
+ return(&r2_40_cbc_cipher);
+ }
+
+static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+ {
+ RC2_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx),
+ key,data(ctx)->key_bits);
+ return 1;
+ }
+
+static int rc2_meth_to_magic(EVP_CIPHER_CTX *e)
+ {
+ int i;
+
+ EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i);
+ if (i == 128) return(RC2_128_MAGIC);
+ else if (i == 64) return(RC2_64_MAGIC);
+ else if (i == 40) return(RC2_40_MAGIC);
+ else return(0);
+ }
+
+static int rc2_magic_to_meth(int i)
+ {
+ if (i == RC2_128_MAGIC) return 128;
+ else if (i == RC2_64_MAGIC) return 64;
+ else if (i == RC2_40_MAGIC) return 40;
+ else
+ {
+ EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
+ return(0);
+ }
+ }
+
+static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
+ {
+ long num=0;
+ int i=0;
+ int key_bits;
+ unsigned int l;
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+
+ if (type != NULL)
+ {
+ l=EVP_CIPHER_CTX_iv_length(c);
+ OPENSSL_assert(l <= sizeof(iv));
+ i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l);
+ if (i != (int)l)
+ return(-1);
+ key_bits =rc2_magic_to_meth((int)num);
+ if (!key_bits)
+ return(-1);
+ if(i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1))
+ return -1;
+ EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL);
+ EVP_CIPHER_CTX_set_key_length(c, key_bits / 8);
+ }
+ return(i);
+ }
+
+static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
+ {
+ long num;
+ int i=0,j;
+
+ if (type != NULL)
+ {
+ num=rc2_meth_to_magic(c);
+ j=EVP_CIPHER_CTX_iv_length(c);
+ i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
+ }
+ return(i);
+ }
+
+static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+ {
+ switch(type)
+ {
+ case EVP_CTRL_INIT:
+ data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8;
+ return 1;
+
+ case EVP_CTRL_GET_RC2_KEY_BITS:
+ *(int *)ptr = data(c)->key_bits;
+ return 1;
+
+ case EVP_CTRL_SET_RC2_KEY_BITS:
+ if(arg > 0)
+ {
+ data(c)->key_bits = arg;
+ return 1;
+ }
+ return 0;
+#ifdef PBE_PRF_TEST
+ case EVP_CTRL_PBE_PRF_NID:
+ *(int *)ptr = NID_hmacWithMD5;
+ return 1;
+#endif
+
+ default:
+ return -1;
+ }
+ }
+
+#endif
projects / cassiopeia.git / blobdiff