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Diffstat (limited to 'crypto/rc2/rc2_ecb.c')
| -rw-r--r-- | crypto/rc2/rc2_ecb.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/crypto/rc2/rc2_ecb.c b/crypto/rc2/rc2_ecb.c new file mode 100644 index 0000000000..65b5d3536a --- /dev/null +++ b/crypto/rc2/rc2_ecb.c @@ -0,0 +1,163 @@ +/* crypto/rc2/rc2_ecb.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.] + */ + +#include "rc2.h" +#include "rc2_locl.h" + +char *RC2_version="RC2 part of SSLeay 0.8.1b 29-Jun-1998"; + +/* RC2 as implemented frm a posting from + * Newsgroups: sci.crypt + * Sender: pgut01@cs.auckland.ac.nz (Peter Gutmann) + * Subject: Specification for Ron Rivests Cipher No.2 + * Message-ID: <4fk39f$f70@net.auckland.ac.nz> + * Date: 11 Feb 1996 06:45:03 GMT + */ + +void RC2_ecb_encrypt(in, out, ks, encrypt) +unsigned char *in; +unsigned char *out; +RC2_KEY *ks; +int encrypt; + { + unsigned long l,d[2]; + + c2l(in,l); d[0]=l; + c2l(in,l); d[1]=l; + RC2_encrypt(d,ks,encrypt); + l=d[0]; l2c(l,out); + l=d[1]; l2c(l,out); + l=d[0]=d[1]=0; + } + +void RC2_encrypt(d,key,encrypt) +unsigned long *d; +RC2_KEY *key; +int encrypt; + { + int i,n; + register RC2_INT *p0,*p1; + register RC2_INT x0,x1,x2,x3,t; + unsigned long l; + + l=d[0]; + x0=(RC2_INT)l&0xffff; + x1=(RC2_INT)(l>>16L); + l=d[1]; + x2=(RC2_INT)l&0xffff; + x3=(RC2_INT)(l>>16L); + + n=3; + i=5; + if (encrypt) + { + p0=p1= &(key->data[0]); + for (;;) + { + t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; + x0=(t<<1)|(t>>15); + t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; + x1=(t<<2)|(t>>14); + t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; + x2=(t<<3)|(t>>13); + t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; + x3=(t<<5)|(t>>11); + + if (--i == 0) + { + if (--n == 0) break; + i=(n == 2)?6:5; + + x0+=p1[x3&0x3f]; + x1+=p1[x0&0x3f]; + x2+=p1[x1&0x3f]; + x3+=p1[x2&0x3f]; + } + } + } + else + { + p0= &(key->data[63]); + p1= &(key->data[0]); + for (;;) + { + t=((x3<<11)|(x3>>5))&0xffff; + x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff; + t=((x2<<13)|(x2>>3))&0xffff; + x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff; + t=((x1<<14)|(x1>>2))&0xffff; + x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff; + t=((x0<<15)|(x0>>1))&0xffff; + x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff; + + if (--i == 0) + { + if (--n == 0) break; + i=(n == 2)?6:5; + + x3=(x3-p1[x2&0x3f])&0xffff; + x2=(x2-p1[x1&0x3f])&0xffff; + x1=(x1-p1[x0&0x3f])&0xffff; + x0=(x0-p1[x3&0x3f])&0xffff; + } + } + } + + d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L); + d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L); + } |