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Diffstat (limited to 'crypto/idea/i_ecb.c')
| -rw-r--r-- | crypto/idea/i_ecb.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/crypto/idea/i_ecb.c b/crypto/idea/i_ecb.c new file mode 100644 index 0000000000..b3b694b0c6 --- /dev/null +++ b/crypto/idea/i_ecb.c @@ -0,0 +1,138 @@ +/* crypto/idea/i_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 "idea.h" +#include "idea_lcl.h" + +char *IDEA_version="IDEA part of SSLeay 0.8.1b 29-Jun-1998"; + +char *idea_options() + { + if (sizeof(short) != sizeof(IDEA_INT)) + return("idea(int)"); + else + return("idea(short)"); + } + +void idea_ecb_encrypt(in, out, ks) +unsigned char *in; +unsigned char *out; +IDEA_KEY_SCHEDULE *ks; + { + unsigned long l0,l1,d[2]; + + n2l(in,l0); d[0]=l0; + n2l(in,l1); d[1]=l1; + idea_encrypt(d,ks); + l0=d[0]; l2n(l0,out); + l1=d[1]; l2n(l1,out); + l0=l1=d[0]=d[1]=0; + } + +void idea_encrypt(d,key) +unsigned long *d; +IDEA_KEY_SCHEDULE *key; + { + int i; + register IDEA_INT *p; + register unsigned long x1,x2,x3,x4,t0,t1,ul; + + x2=d[0]; + x1=(x2>>16); + x4=d[1]; + x3=(x4>>16); + + p= &(key->data[0][0]); + for (i=0; i<8; i++) + { + x1&=0xffff; + idea_mul(x1,x1,*p,ul); p++; + + x2+= *(p++); + x3+= *(p++); + + x4&=0xffff; + idea_mul(x4,x4,*p,ul); p++; + + t0=(x1^x3)&0xffff; + idea_mul(t0,t0,*p,ul); p++; + + t1=(t0+(x2^x4))&0xffff; + idea_mul(t1,t1,*p,ul); p++; + + t0+=t1; + + x1^=t1; + x4^=t0; + ul=x2^t0; /* do the swap to x3 */ + x2=x3^t1; + x3=ul; + } + + x1&=0xffff; + idea_mul(x1,x1,*p,ul); p++; + + t0= x3+ *(p++); + t1= x2+ *(p++); + + x4&=0xffff; + idea_mul(x4,x4,*p,ul); + + d[0]=(t0&0xffff)|((x1&0xffff)<<16); + d[1]=(x4&0xffff)|((t1&0xffff)<<16); + } |