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Diffstat (limited to 'openssl/crypto/rc5/rc5_skey.c')
| -rw-r--r-- | openssl/crypto/rc5/rc5_skey.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/openssl/crypto/rc5/rc5_skey.c b/openssl/crypto/rc5/rc5_skey.c new file mode 100644 index 000000000..247fa6500 --- /dev/null +++ b/openssl/crypto/rc5/rc5_skey.c @@ -0,0 +1,130 @@ +/* crypto/rc5/rc5_skey.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 <openssl/crypto.h> +#include <openssl/rc5.h> +#ifdef OPENSSL_FIPS +#include <openssl/fips.h> +#endif + +#include "rc5_locl.h" + +#ifdef OPENSSL_FIPS +void RC5_32_set_key(RC5_32_KEY *key, int len, const unsigned char *data, + int rounds) + { + if (FIPS_mode()) + FIPS_BAD_ABORT(RC5) + private_RC5_32_set_key(key, len, data, rounds); + } +void private_RC5_32_set_key(RC5_32_KEY *key, int len, const unsigned char *data, + int rounds) +#else +void RC5_32_set_key(RC5_32_KEY *key, int len, const unsigned char *data, + int rounds) +#endif + { + RC5_32_INT L[64],l,ll,A,B,*S,k; + int i,j,m,c,t,ii,jj; + + if ( (rounds != RC5_16_ROUNDS) && + (rounds != RC5_12_ROUNDS) && + (rounds != RC5_8_ROUNDS)) + rounds=RC5_16_ROUNDS; + + key->rounds=rounds; + S= &(key->data[0]); + j=0; + for (i=0; i<=(len-8); i+=8) + { + c2l(data,l); + L[j++]=l; + c2l(data,l); + L[j++]=l; + } + ii=len-i; + if (ii) + { + k=len&0x07; + c2ln(data,l,ll,k); + L[j+0]=l; + L[j+1]=ll; + } + + c=(len+3)/4; + t=(rounds+1)*2; + S[0]=RC5_32_P; + for (i=1; i<t; i++) + S[i]=(S[i-1]+RC5_32_Q)&RC5_32_MASK; + + j=(t>c)?t:c; + j*=3; + ii=jj=0; + A=B=0; + for (i=0; i<j; i++) + { + k=(S[ii]+A+B)&RC5_32_MASK; + A=S[ii]=ROTATE_l32(k,3); + m=(int)(A+B); + k=(L[jj]+A+B)&RC5_32_MASK; + B=L[jj]=ROTATE_l32(k,m); + if (++ii >= t) ii=0; + if (++jj >= c) jj=0; + } + } + |