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Diffstat (limited to 'crypto/evp/e_cfb_i.c')
| -rw-r--r-- | crypto/evp/e_cfb_i.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/crypto/evp/e_cfb_i.c b/crypto/evp/e_cfb_i.c new file mode 100644 index 0000000000..7fe2fbf6df --- /dev/null +++ b/crypto/evp/e_cfb_i.c @@ -0,0 +1,116 @@ +/* crypto/evp/e_cfb_i.c */ +/* Copyright (C) 1995-1997 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_IDEA + +#include <stdio.h> +#include "cryptlib.h" +#include "evp.h" +#include "objects.h" + +#ifndef NOPROTO +static void idea_cfb_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, + unsigned char *iv,int enc); +static void idea_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + unsigned char *in, unsigned int inl); +#else +static void idea_cfb_init_key(); +static void idea_cfb_cipher(); +#endif + +static EVP_CIPHER i_cfb_cipher= + { + NID_idea_cfb64, + 1,IDEA_KEY_LENGTH,IDEA_BLOCK, + idea_cfb_init_key, + idea_cfb_cipher, + }; + +EVP_CIPHER *EVP_idea_cfb() + { + return(&i_cfb_cipher); + } + +static void idea_cfb_init_key(ctx,key,iv,enc) +EVP_CIPHER_CTX *ctx; +unsigned char *key; +unsigned char *iv; +int enc; + { + ctx->c.idea_cfb.num=0; + + if (iv != NULL) + memcpy(&(ctx->c.idea_cfb.oiv[0]),iv,8); + memcpy(&(ctx->c.idea_cfb.iv[0]),&(ctx->c.idea_cfb.oiv[0]),8); + if (key != NULL) + idea_set_encrypt_key(key,&(ctx->c.idea_cfb.ks)); + } + +static void idea_cfb_cipher(ctx,out,in,inl) +EVP_CIPHER_CTX *ctx; +unsigned char *out; +unsigned char *in; +unsigned int inl; + { + idea_cfb64_encrypt( + in,out,(long)inl, + &(ctx->c.idea_cfb.ks),&(ctx->c.idea_cfb.iv[0]), + &ctx->c.idea_cfb.num,ctx->encrypt); + } + +#endif |