dropbear: rc2.c annotate

annotate rc2.c @ 211:f01f0400314d libtomcrypt

disapproval of revision 6a39eb8b36778460fca83b8149df2a8b6d3327fd

author	Matt Johnston <matt@ucc.asn.au>
date	Wed, 06 Jul 2005 13:23:45 +0000
parents	d7da3b1e1540
children	5d99163f7e32

rev	line source
0 d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 * LibTomCrypt is a library that provides various cryptographic
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * algorithms in a highly modular and flexible manner.
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 * The library is free for all purposes without any express
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * guarantee it works.
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * Tom St Denis, [email protected], http://libtomcrypt.org
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 */
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11 /**********************************************************************\
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 * To commemorate the 1996 RSA Data Security Conference, the following *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 * code is released into the public domain by its author. Prost! *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 * *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 * This cipher uses 16-bit words and little-endian byte ordering. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 * I wonder which processor it was optimized for? *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 * *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 * Thanks to CodeView, SoftIce, and D86 for helping bring this code to *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 * the public. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 \**********************************************************************/
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 #include <mycrypt.h>
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24 #ifdef RC2
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 const struct _cipher_descriptor rc2_desc = {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 "rc2",
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 12, 8, 128, 8, 16,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 &rc2_setup,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 &rc2_ecb_encrypt,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 &rc2_ecb_decrypt,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 &rc2_test,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 &rc2_keysize
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 };
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 /**********************************************************************\
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38 * Expand a variable-length user key (between 1 and 128 bytes) to a *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39 * 64-short working rc2 key, of at most "bits" effective key bits. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	40 * The effective key bits parameter looks like an export control hack. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41 * For normal use, it should always be set to 1024. For convenience, *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 * zero is accepted as an alias for 1024. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 \**********************************************************************/
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 /* 256-entry permutation table, probably derived somehow from pi */
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 static const unsigned char permute[256] = {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 217,120,249,196, 25,221,181,237, 40,233,253,121, 74,160,216,157,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 198,126, 55,131, 43,118, 83,142, 98, 76,100,136, 68,139,251,162,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 23,154, 89,245,135,179, 79, 19, 97, 69,109,141, 9,129,125, 50,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50 189,143, 64,235,134,183,123, 11,240,149, 33, 34, 92,107, 78,130,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51 84,214,101,147,206, 96,178, 28,115, 86,192, 20,167,140,241,220,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	52 18,117,202, 31, 59,190,228,209, 66, 61,212, 48,163, 60,182, 38,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	53 111,191, 14,218, 70,105, 7, 87, 39,242, 29,155,188,148, 67, 3,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	54 248, 17,199,246,144,239, 62,231, 6,195,213, 47,200,102, 30,215,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55 8,232,234,222,128, 82,238,247,132,170,114,172, 53, 77,106, 42,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56 150, 26,210,113, 90, 21, 73,116, 75,159,208, 94, 4, 24,164,236,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57 194,224, 65,110, 15, 81,203,204, 36,145,175, 80,161,244,112, 57,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	58 153,124, 58,133, 35,184,180,122,252, 2, 54, 91, 37, 85,151, 49,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59 45, 93,250,152,227,138,146,174, 5,223, 41, 16,103,108,186,201,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60 211, 0,230,207,225,158,168, 44, 99, 22, 1, 63, 88,226,137,169,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61 13, 56, 52, 27,171, 51,255,176,187, 72, 12, 95,185,177,205, 46,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62 197,243,219, 71,229,165,156,119, 10,166, 32,104,254,127,193,173
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	63 };
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65 int rc2_setup(const unsigned char key, int keylen, int rounds, symmetric_key skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 unsigned *xkey = skey->rc2.xkey;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 unsigned char tmp[128];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 unsigned T8, TM;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70 int i, bits;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72 _ARGCHK(key != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	73 _ARGCHK(skey != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75 if (keylen < 8 \|\| keylen > 128) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76 return CRYPT_INVALID_KEYSIZE;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79 if (rounds != 0 && rounds != 16) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80 return CRYPT_INVALID_ROUNDS;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83 for (i = 0; i < keylen; i++) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 tmp[i] = key[i] & 255;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	85 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87 /* Phase 1: Expand input key to 128 bytes */
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88 if (keylen < 128) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	89 for (i = keylen; i < 128; i++) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90 tmp[i] = permute[(int)((tmp[i - 1] + tmp[i - keylen]) & 255)];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	91 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94 /* Phase 2 - reduce effective key size to "bits" */
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 bits = keylen*8;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 T8 = (unsigned)(bits+7)>>3;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 TM = (255 >> (unsigned)(7 & -bits));
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 tmp[128 - T8] = permute[(int)(tmp[128 - T8] & TM)];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 for (i = 127 - T8; i >= 0; i--) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 tmp[i] = permute[(int)(tmp[i + 1] ^ tmp[i + T8])];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 /* Phase 3 - copy to xkey in little-endian order */
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 i = 63;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 do {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106 xkey[i] = (unsigned)tmp[2i] + ((unsigned)tmp[2i+1] << 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107 } while (i-- > 0);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 #ifdef CLEAN_STACK
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 zeromem(tmp, sizeof(tmp));
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 return CRYPT_OK;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 /**********************************************************************\
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 * Encrypt an 8-byte block of plaintext using the given key. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 \**********************************************************************/
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 #ifdef CLEAN_STACK
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 static void _rc2_ecb_encrypt( const unsigned char *plain,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121 unsigned char *cipher,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 symmetric_key *skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123 #else
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 void rc2_ecb_encrypt( const unsigned char *plain,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 unsigned char *cipher,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 symmetric_key *skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 unsigned *xkey;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 unsigned x76, x54, x32, x10, i;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 _ARGCHK(plain != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 _ARGCHK(cipher != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 _ARGCHK(skey != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 xkey = skey->rc2.xkey;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 x76 = ((unsigned)plain[7] << 8) + (unsigned)plain[6];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139 x54 = ((unsigned)plain[5] << 8) + (unsigned)plain[4];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 x32 = ((unsigned)plain[3] << 8) + (unsigned)plain[2];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 x10 = ((unsigned)plain[1] << 8) + (unsigned)plain[0];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 for (i = 0; i < 16; i++) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 x10 = (x10 + (x32 & ~x76) + (x54 & x76) + xkey[4*i+0]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 x10 = ((x10 << 1) \| (x10 >> 15)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 x32 = (x32 + (x54 & ~x10) + (x76 & x10) + xkey[4*i+1]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 x32 = ((x32 << 2) \| (x32 >> 14)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 x54 = (x54 + (x76 & ~x32) + (x10 & x32) + xkey[4*i+2]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 x54 = ((x54 << 3) \| (x54 >> 13)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 x76 = (x76 + (x10 & ~x54) + (x32 & x54) + xkey[4*i+3]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 x76 = ((x76 << 5) \| (x76 >> 11)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 if (i == 4 \|\| i == 10) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 x10 = (x10 + xkey[x76 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 x32 = (x32 + xkey[x10 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 x54 = (x54 + xkey[x32 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 x76 = (x76 + xkey[x54 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 cipher[0] = (unsigned char)x10;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 cipher[1] = (unsigned char)(x10 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 cipher[2] = (unsigned char)x32;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 cipher[3] = (unsigned char)(x32 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168 cipher[4] = (unsigned char)x54;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 cipher[5] = (unsigned char)(x54 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 cipher[6] = (unsigned char)x76;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 cipher[7] = (unsigned char)(x76 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 #ifdef CLEAN_STACK
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 void rc2_ecb_encrypt( const unsigned char *plain,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 unsigned char *cipher,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 symmetric_key *skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	179 _rc2_ecb_encrypt(plain, cipher, skey);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	180 burn_stack(sizeof(unsigned ) + sizeof(unsigned) 5);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	181 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 /**********************************************************************\
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185 * Decrypt an 8-byte block of ciphertext using the given key. *
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 \**********************************************************************/
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 #ifdef CLEAN_STACK
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 static void _rc2_ecb_decrypt( const unsigned char *cipher,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 unsigned char *plain,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 symmetric_key *skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 #else
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 void rc2_ecb_decrypt( const unsigned char *cipher,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 unsigned char *plain,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 symmetric_key *skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 unsigned x76, x54, x32, x10;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 unsigned *xkey;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 int i;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 _ARGCHK(plain != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 _ARGCHK(cipher != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 _ARGCHK(skey != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206 xkey = skey->rc2.xkey;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 x76 = ((unsigned)cipher[7] << 8) + (unsigned)cipher[6];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 x54 = ((unsigned)cipher[5] << 8) + (unsigned)cipher[4];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210 x32 = ((unsigned)cipher[3] << 8) + (unsigned)cipher[2];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 x10 = ((unsigned)cipher[1] << 8) + (unsigned)cipher[0];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 for (i = 15; i >= 0; i--) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 if (i == 4 \|\| i == 10) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 x76 = (x76 - xkey[x54 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 x54 = (x54 - xkey[x32 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 x32 = (x32 - xkey[x10 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218 x10 = (x10 - xkey[x76 & 63]) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 x76 = ((x76 << 11) \| (x76 >> 5)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 x76 = (x76 - ((x10 & ~x54) + (x32 & x54) + xkey[4*i+3])) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224 x54 = ((x54 << 13) \| (x54 >> 3)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 x54 = (x54 - ((x76 & ~x32) + (x10 & x32) + xkey[4*i+2])) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227 x32 = ((x32 << 14) \| (x32 >> 2)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	228 x32 = (x32 - ((x54 & ~x10) + (x76 & x10) + xkey[4*i+1])) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 x10 = ((x10 << 15) \| (x10 >> 1)) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231 x10 = (x10 - ((x32 & ~x76) + (x54 & x76) + xkey[4*i+0])) & 0xFFFF;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 plain[0] = (unsigned char)x10;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235 plain[1] = (unsigned char)(x10 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	236 plain[2] = (unsigned char)x32;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 plain[3] = (unsigned char)(x32 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238 plain[4] = (unsigned char)x54;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 plain[5] = (unsigned char)(x54 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 plain[6] = (unsigned char)x76;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 plain[7] = (unsigned char)(x76 >> 8);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244 #ifdef CLEAN_STACK
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245 void rc2_ecb_decrypt( const unsigned char *cipher,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 unsigned char *plain,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 symmetric_key *skey)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 _rc2_ecb_decrypt(cipher, plain, skey);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 burn_stack(sizeof(unsigned ) + sizeof(unsigned) 4 + sizeof(int));
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254 int rc2_test(void)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256 #ifndef LTC_TEST
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 return CRYPT_NOP;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 #else
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 static const struct {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260 int keylen;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 unsigned char key[16], pt[8], ct[8];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262 } tests[] = {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	264 { 8,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	265 { 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	267 { 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 },
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	268 { 0x30, 0x64, 0x9e, 0xdf, 0x9b, 0xe7, 0xd2, 0xc2 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	269
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 },
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271 { 16,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 { 0x88, 0xbc, 0xa9, 0x0e, 0x90, 0x87, 0x5a, 0x7f,
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 0x0f, 0x79, 0xc3, 0x84, 0x62, 0x7b, 0xaf, 0xb2 },
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	274 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275 { 0x22, 0x69, 0x55, 0x2a, 0xb0, 0xf8, 0x5c, 0xa6 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277 };
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 int x, y, err;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 symmetric_key skey;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280 unsigned char tmp[2][8];
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	281
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	282 for (x = 0; x < (int)(sizeof(tests) / sizeof(tests[0])); x++) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	283 zeromem(tmp, sizeof(tmp));
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	284 if ((err = rc2_setup(tests[x].key, tests[x].keylen, 0, &skey)) != CRYPT_OK) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	285 return err;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	286 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 rc2_ecb_encrypt(tests[x].pt, tmp[0], &skey);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 rc2_ecb_decrypt(tmp[0], tmp[1], &skey);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 if (memcmp(tmp[0], tests[x].ct, 8) != 0 \|\| memcmp(tmp[1], tests[x].pt, 8) != 0) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 return CRYPT_FAIL_TESTVECTOR;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 for (y = 0; y < 8; y++) tmp[0][y] = 0;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 for (y = 0; y < 1000; y++) rc2_ecb_encrypt(tmp[0], tmp[0], &skey);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 for (y = 0; y < 1000; y++) rc2_ecb_decrypt(tmp[0], tmp[0], &skey);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 for (y = 0; y < 8; y++) if (tmp[0][y] != 0) return CRYPT_FAIL_TESTVECTOR;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	301 return CRYPT_OK;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 int rc2_keysize(int *keysize)
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306 {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307 _ARGCHK(keysize != NULL);
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 if (*keysize < 8) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 return CRYPT_INVALID_KEYSIZE;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310 } else if (*keysize > 128) {
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	311 *keysize = 128;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313 return CRYPT_OK;
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314 }
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316 #endif
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318
d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319

Mercurial > dropbear

annotate rc2.c @ 211:f01f0400314d libtomcrypt