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Diffstat (limited to 'crypto/evp/e_rc2.c')
| -rw-r--r-- | crypto/evp/e_rc2.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/crypto/evp/e_rc2.c b/crypto/evp/e_rc2.c new file mode 100644 index 0000000..4c3bf1e --- /dev/null +++ b/crypto/evp/e_rc2.c @@ -0,0 +1,198 @@ +/* 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.] + */ + +#ifndef NO_RC2 + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/evp.h> +#include <openssl/objects.h> +#include "evp_locl.h" + +static int rc2_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, + unsigned char *iv,int enc); +static int rc2_meth_to_magic(const EVP_CIPHER *e); +static EVP_CIPHER *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); + +IMPLEMENT_BLOCK_CIPHER(rc2, rc2.ks, RC2, rc2, NID_rc2, + 8, + EVP_RC2_KEY_SIZE, 8, + EVP_CIPH_VARIABLE_LENGTH, rc2_init_key, NULL, + rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, NULL) + +#define RC2_40_MAGIC 0xa0 +#define RC2_64_MAGIC 0x78 +#define RC2_128_MAGIC 0x3a + +static EVP_CIPHER r2_64_cbc_cipher= + { + NID_rc2_64_cbc, + 8,8 /* 64 bit */,8, + EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH, + rc2_init_key, + rc2_cbc_cipher, + NULL, + sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+ + sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)), + rc2_set_asn1_type_and_iv, + rc2_get_asn1_type_and_iv, + NULL, + NULL + }; + +static EVP_CIPHER r2_40_cbc_cipher= + { + NID_rc2_40_cbc, + 8,5 /* 40 bit */,8, + EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH, + rc2_init_key, + rc2_cbc_cipher, + NULL, + sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+ + sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)), + rc2_set_asn1_type_and_iv, + rc2_get_asn1_type_and_iv, + NULL, + NULL + }; + +EVP_CIPHER *EVP_rc2_64_cbc(void) + { + return(&r2_64_cbc_cipher); + } + +EVP_CIPHER *EVP_rc2_40_cbc(void) + { + return(&r2_40_cbc_cipher); + } + +static int rc2_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, + unsigned char *iv, int enc) + { + RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx), + key,EVP_CIPHER_key_length(ctx->cipher)*8); + return 1; + } + +static int rc2_meth_to_magic(const EVP_CIPHER *e) + { + int i; + + i=EVP_CIPHER_key_length(e); + if (i == 16) return(RC2_128_MAGIC); + else if (i == 8) return(RC2_64_MAGIC); + else if (i == 5) return(RC2_40_MAGIC); + else return(0); + } + +static EVP_CIPHER *rc2_magic_to_meth(int i) + { + if (i == RC2_128_MAGIC) return(EVP_rc2_cbc()); + else if (i == RC2_64_MAGIC) return(EVP_rc2_64_cbc()); + else if (i == RC2_40_MAGIC) return(EVP_rc2_40_cbc()); + else + { + EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE); + return(NULL); + } + } + +static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) + { + long num=0; + int i=0,l; + EVP_CIPHER *e; + + if (type != NULL) + { + l=EVP_CIPHER_CTX_iv_length(c); + i=ASN1_TYPE_get_int_octetstring(type,&num,c->oiv,l); + if (i != l) + return(-1); + else if (i > 0) + memcpy(c->iv,c->oiv,l); + e=rc2_magic_to_meth((int)num); + if (e == NULL) + return(-1); + if (e != EVP_CIPHER_CTX_cipher(c)) + { + EVP_CIPHER_CTX_cipher(c)=e; + EVP_CIPHER_CTX_set_key_length(c, EVP_CIPHER_key_length(c)); + rc2_init_key(c,NULL,NULL,1); + } + } + 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(EVP_CIPHER_CTX_cipher(c)); + j=EVP_CIPHER_CTX_iv_length(c); + i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j); + } + return(i); + } + +#endif |