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Diffstat (limited to 'openssl/crypto/evp/e_rc2.c')
| -rw-r--r-- | openssl/crypto/evp/e_rc2.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_rc2.c b/openssl/crypto/evp/e_rc2.c new file mode 100644 index 000000000..d37726ffa --- /dev/null +++ b/openssl/crypto/evp/e_rc2.c @@ -0,0 +1,232 @@ +/* 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); + 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; + + default: + return -1; + } + } + +#endif |