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Diffstat (limited to 'crypto/des/set_key.c')
| -rw-r--r-- | crypto/des/set_key.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/crypto/des/set_key.c b/crypto/des/set_key.c new file mode 100644 index 000000000000..55efe03f4233 --- /dev/null +++ b/crypto/des/set_key.c @@ -0,0 +1,407 @@ +/* crypto/des/set_key.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.] + */ + +/* set_key.c v 1.4 eay 24/9/91 + * 1.4 Speed up by 400% :-) + * 1.3 added register declarations. + * 1.2 unrolled make_key_sched a bit more + * 1.1 added norm_expand_bits + * 1.0 First working version + */ +#include "des_locl.h" + +OPENSSL_IMPLEMENT_GLOBAL(int,DES_check_key); /* defaults to false */ + +static const unsigned char odd_parity[256]={ + 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14, + 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31, + 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47, + 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62, + 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79, + 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94, + 97, 97, 98, 98,100,100,103,103,104,104,107,107,109,109,110,110, +112,112,115,115,117,117,118,118,121,121,122,122,124,124,127,127, +128,128,131,131,133,133,134,134,137,137,138,138,140,140,143,143, +145,145,146,146,148,148,151,151,152,152,155,155,157,157,158,158, +161,161,162,162,164,164,167,167,168,168,171,171,173,173,174,174, +176,176,179,179,181,181,182,182,185,185,186,186,188,188,191,191, +193,193,194,194,196,196,199,199,200,200,203,203,205,205,206,206, +208,208,211,211,213,213,214,214,217,217,218,218,220,220,223,223, +224,224,227,227,229,229,230,230,233,233,234,234,236,236,239,239, +241,241,242,242,244,244,247,247,248,248,251,251,253,253,254,254}; + +void DES_set_odd_parity(DES_cblock *key) + { + unsigned int i; + + for (i=0; i<DES_KEY_SZ; i++) + (*key)[i]=odd_parity[(*key)[i]]; + } + +int DES_check_key_parity(const_DES_cblock *key) + { + unsigned int i; + + for (i=0; i<DES_KEY_SZ; i++) + { + if ((*key)[i] != odd_parity[(*key)[i]]) + return(0); + } + return(1); + } + +/* Weak and semi week keys as take from + * %A D.W. Davies + * %A W.L. Price + * %T Security for Computer Networks + * %I John Wiley & Sons + * %D 1984 + * Many thanks to smb@ulysses.att.com (Steven Bellovin) for the reference + * (and actual cblock values). + */ +#define NUM_WEAK_KEY 16 +static DES_cblock weak_keys[NUM_WEAK_KEY]={ + /* weak keys */ + {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, + {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE}, + {0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E}, + {0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1}, + /* semi-weak keys */ + {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, + {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01}, + {0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1}, + {0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E}, + {0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1}, + {0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01}, + {0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE}, + {0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E}, + {0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E}, + {0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01}, + {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE}, + {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}}; + +int DES_is_weak_key(const_DES_cblock *key) + { + int i; + + for (i=0; i<NUM_WEAK_KEY; i++) + /* Added == 0 to comparison, I obviously don't run + * this section very often :-(, thanks to + * engineering@MorningStar.Com for the fix + * eay 93/06/29 + * Another problem, I was comparing only the first 4 + * bytes, 97/03/18 */ + if (memcmp(weak_keys[i],key,sizeof(DES_cblock)) == 0) return(1); + return(0); + } + +/* NOW DEFINED IN des_local.h + * See ecb_encrypt.c for a pseudo description of these macros. + * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ + * (b)^=(t),\ + * (a)=((a)^((t)<<(n)))) + */ + +#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ + (a)=(a)^(t)^(t>>(16-(n)))) + +static const DES_LONG des_skb[8][64]={ + { + /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */ + 0x00000000L,0x00000010L,0x20000000L,0x20000010L, + 0x00010000L,0x00010010L,0x20010000L,0x20010010L, + 0x00000800L,0x00000810L,0x20000800L,0x20000810L, + 0x00010800L,0x00010810L,0x20010800L,0x20010810L, + 0x00000020L,0x00000030L,0x20000020L,0x20000030L, + 0x00010020L,0x00010030L,0x20010020L,0x20010030L, + 0x00000820L,0x00000830L,0x20000820L,0x20000830L, + 0x00010820L,0x00010830L,0x20010820L,0x20010830L, + 0x00080000L,0x00080010L,0x20080000L,0x20080010L, + 0x00090000L,0x00090010L,0x20090000L,0x20090010L, + 0x00080800L,0x00080810L,0x20080800L,0x20080810L, + 0x00090800L,0x00090810L,0x20090800L,0x20090810L, + 0x00080020L,0x00080030L,0x20080020L,0x20080030L, + 0x00090020L,0x00090030L,0x20090020L,0x20090030L, + 0x00080820L,0x00080830L,0x20080820L,0x20080830L, + 0x00090820L,0x00090830L,0x20090820L,0x20090830L, + },{ + /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */ + 0x00000000L,0x02000000L,0x00002000L,0x02002000L, + 0x00200000L,0x02200000L,0x00202000L,0x02202000L, + 0x00000004L,0x02000004L,0x00002004L,0x02002004L, + 0x00200004L,0x02200004L,0x00202004L,0x02202004L, + 0x00000400L,0x02000400L,0x00002400L,0x02002400L, + 0x00200400L,0x02200400L,0x00202400L,0x02202400L, + 0x00000404L,0x02000404L,0x00002404L,0x02002404L, + 0x00200404L,0x02200404L,0x00202404L,0x02202404L, + 0x10000000L,0x12000000L,0x10002000L,0x12002000L, + 0x10200000L,0x12200000L,0x10202000L,0x12202000L, + 0x10000004L,0x12000004L,0x10002004L,0x12002004L, + 0x10200004L,0x12200004L,0x10202004L,0x12202004L, + 0x10000400L,0x12000400L,0x10002400L,0x12002400L, + 0x10200400L,0x12200400L,0x10202400L,0x12202400L, + 0x10000404L,0x12000404L,0x10002404L,0x12002404L, + 0x10200404L,0x12200404L,0x10202404L,0x12202404L, + },{ + /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */ + 0x00000000L,0x00000001L,0x00040000L,0x00040001L, + 0x01000000L,0x01000001L,0x01040000L,0x01040001L, + 0x00000002L,0x00000003L,0x00040002L,0x00040003L, + 0x01000002L,0x01000003L,0x01040002L,0x01040003L, + 0x00000200L,0x00000201L,0x00040200L,0x00040201L, + 0x01000200L,0x01000201L,0x01040200L,0x01040201L, + 0x00000202L,0x00000203L,0x00040202L,0x00040203L, + 0x01000202L,0x01000203L,0x01040202L,0x01040203L, + 0x08000000L,0x08000001L,0x08040000L,0x08040001L, + 0x09000000L,0x09000001L,0x09040000L,0x09040001L, + 0x08000002L,0x08000003L,0x08040002L,0x08040003L, + 0x09000002L,0x09000003L,0x09040002L,0x09040003L, + 0x08000200L,0x08000201L,0x08040200L,0x08040201L, + 0x09000200L,0x09000201L,0x09040200L,0x09040201L, + 0x08000202L,0x08000203L,0x08040202L,0x08040203L, + 0x09000202L,0x09000203L,0x09040202L,0x09040203L, + },{ + /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */ + 0x00000000L,0x00100000L,0x00000100L,0x00100100L, + 0x00000008L,0x00100008L,0x00000108L,0x00100108L, + 0x00001000L,0x00101000L,0x00001100L,0x00101100L, + 0x00001008L,0x00101008L,0x00001108L,0x00101108L, + 0x04000000L,0x04100000L,0x04000100L,0x04100100L, + 0x04000008L,0x04100008L,0x04000108L,0x04100108L, + 0x04001000L,0x04101000L,0x04001100L,0x04101100L, + 0x04001008L,0x04101008L,0x04001108L,0x04101108L, + 0x00020000L,0x00120000L,0x00020100L,0x00120100L, + 0x00020008L,0x00120008L,0x00020108L,0x00120108L, + 0x00021000L,0x00121000L,0x00021100L,0x00121100L, + 0x00021008L,0x00121008L,0x00021108L,0x00121108L, + 0x04020000L,0x04120000L,0x04020100L,0x04120100L, + 0x04020008L,0x04120008L,0x04020108L,0x04120108L, + 0x04021000L,0x04121000L,0x04021100L,0x04121100L, + 0x04021008L,0x04121008L,0x04021108L,0x04121108L, + },{ + /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */ + 0x00000000L,0x10000000L,0x00010000L,0x10010000L, + 0x00000004L,0x10000004L,0x00010004L,0x10010004L, + 0x20000000L,0x30000000L,0x20010000L,0x30010000L, + 0x20000004L,0x30000004L,0x20010004L,0x30010004L, + 0x00100000L,0x10100000L,0x00110000L,0x10110000L, + 0x00100004L,0x10100004L,0x00110004L,0x10110004L, + 0x20100000L,0x30100000L,0x20110000L,0x30110000L, + 0x20100004L,0x30100004L,0x20110004L,0x30110004L, + 0x00001000L,0x10001000L,0x00011000L,0x10011000L, + 0x00001004L,0x10001004L,0x00011004L,0x10011004L, + 0x20001000L,0x30001000L,0x20011000L,0x30011000L, + 0x20001004L,0x30001004L,0x20011004L,0x30011004L, + 0x00101000L,0x10101000L,0x00111000L,0x10111000L, + 0x00101004L,0x10101004L,0x00111004L,0x10111004L, + 0x20101000L,0x30101000L,0x20111000L,0x30111000L, + 0x20101004L,0x30101004L,0x20111004L,0x30111004L, + },{ + /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */ + 0x00000000L,0x08000000L,0x00000008L,0x08000008L, + 0x00000400L,0x08000400L,0x00000408L,0x08000408L, + 0x00020000L,0x08020000L,0x00020008L,0x08020008L, + 0x00020400L,0x08020400L,0x00020408L,0x08020408L, + 0x00000001L,0x08000001L,0x00000009L,0x08000009L, + 0x00000401L,0x08000401L,0x00000409L,0x08000409L, + 0x00020001L,0x08020001L,0x00020009L,0x08020009L, + 0x00020401L,0x08020401L,0x00020409L,0x08020409L, + 0x02000000L,0x0A000000L,0x02000008L,0x0A000008L, + 0x02000400L,0x0A000400L,0x02000408L,0x0A000408L, + 0x02020000L,0x0A020000L,0x02020008L,0x0A020008L, + 0x02020400L,0x0A020400L,0x02020408L,0x0A020408L, + 0x02000001L,0x0A000001L,0x02000009L,0x0A000009L, + 0x02000401L,0x0A000401L,0x02000409L,0x0A000409L, + 0x02020001L,0x0A020001L,0x02020009L,0x0A020009L, + 0x02020401L,0x0A020401L,0x02020409L,0x0A020409L, + },{ + /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */ + 0x00000000L,0x00000100L,0x00080000L,0x00080100L, + 0x01000000L,0x01000100L,0x01080000L,0x01080100L, + 0x00000010L,0x00000110L,0x00080010L,0x00080110L, + 0x01000010L,0x01000110L,0x01080010L,0x01080110L, + 0x00200000L,0x00200100L,0x00280000L,0x00280100L, + 0x01200000L,0x01200100L,0x01280000L,0x01280100L, + 0x00200010L,0x00200110L,0x00280010L,0x00280110L, + 0x01200010L,0x01200110L,0x01280010L,0x01280110L, + 0x00000200L,0x00000300L,0x00080200L,0x00080300L, + 0x01000200L,0x01000300L,0x01080200L,0x01080300L, + 0x00000210L,0x00000310L,0x00080210L,0x00080310L, + 0x01000210L,0x01000310L,0x01080210L,0x01080310L, + 0x00200200L,0x00200300L,0x00280200L,0x00280300L, + 0x01200200L,0x01200300L,0x01280200L,0x01280300L, + 0x00200210L,0x00200310L,0x00280210L,0x00280310L, + 0x01200210L,0x01200310L,0x01280210L,0x01280310L, + },{ + /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */ + 0x00000000L,0x04000000L,0x00040000L,0x04040000L, + 0x00000002L,0x04000002L,0x00040002L,0x04040002L, + 0x00002000L,0x04002000L,0x00042000L,0x04042000L, + 0x00002002L,0x04002002L,0x00042002L,0x04042002L, + 0x00000020L,0x04000020L,0x00040020L,0x04040020L, + 0x00000022L,0x04000022L,0x00040022L,0x04040022L, + 0x00002020L,0x04002020L,0x00042020L,0x04042020L, + 0x00002022L,0x04002022L,0x00042022L,0x04042022L, + 0x00000800L,0x04000800L,0x00040800L,0x04040800L, + 0x00000802L,0x04000802L,0x00040802L,0x04040802L, + 0x00002800L,0x04002800L,0x00042800L,0x04042800L, + 0x00002802L,0x04002802L,0x00042802L,0x04042802L, + 0x00000820L,0x04000820L,0x00040820L,0x04040820L, + 0x00000822L,0x04000822L,0x00040822L,0x04040822L, + 0x00002820L,0x04002820L,0x00042820L,0x04042820L, + 0x00002822L,0x04002822L,0x00042822L,0x04042822L, + }}; + +int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule) + { + if (DES_check_key) + { + return DES_set_key_checked(key, schedule); + } + else + { + DES_set_key_unchecked(key, schedule); + return 0; + } + } + +/* return 0 if key parity is odd (correct), + * return -1 if key parity error, + * return -2 if illegal weak key. + */ +int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule) + { + if (!DES_check_key_parity(key)) + return(-1); + if (DES_is_weak_key(key)) + return(-2); + DES_set_key_unchecked(key, schedule); + return 0; + } + +void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule) + { + static int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0}; + register DES_LONG c,d,t,s,t2; + register const unsigned char *in; + register DES_LONG *k; + register int i; + +#ifdef OPENBSD_DEV_CRYPTO + memcpy(schedule->key,key,sizeof schedule->key); + schedule->session=NULL; +#endif + k = &schedule->ks->deslong[0]; + in = &(*key)[0]; + + c2l(in,c); + c2l(in,d); + + /* do PC1 in 47 simple operations :-) + * Thanks to John Fletcher (john_fletcher@lccmail.ocf.llnl.gov) + * for the inspiration. :-) */ + PERM_OP (d,c,t,4,0x0f0f0f0fL); + HPERM_OP(c,t,-2,0xcccc0000L); + HPERM_OP(d,t,-2,0xcccc0000L); + PERM_OP (d,c,t,1,0x55555555L); + PERM_OP (c,d,t,8,0x00ff00ffL); + PERM_OP (d,c,t,1,0x55555555L); + d= (((d&0x000000ffL)<<16L)| (d&0x0000ff00L) | + ((d&0x00ff0000L)>>16L)|((c&0xf0000000L)>>4L)); + c&=0x0fffffffL; + + for (i=0; i<ITERATIONS; i++) + { + if (shifts2[i]) + { c=((c>>2L)|(c<<26L)); d=((d>>2L)|(d<<26L)); } + else + { c=((c>>1L)|(c<<27L)); d=((d>>1L)|(d<<27L)); } + c&=0x0fffffffL; + d&=0x0fffffffL; + /* could be a few less shifts but I am to lazy at this + * point in time to investigate */ + s= des_skb[0][ (c )&0x3f ]| + des_skb[1][((c>> 6L)&0x03)|((c>> 7L)&0x3c)]| + des_skb[2][((c>>13L)&0x0f)|((c>>14L)&0x30)]| + des_skb[3][((c>>20L)&0x01)|((c>>21L)&0x06) | + ((c>>22L)&0x38)]; + t= des_skb[4][ (d )&0x3f ]| + des_skb[5][((d>> 7L)&0x03)|((d>> 8L)&0x3c)]| + des_skb[6][ (d>>15L)&0x3f ]| + des_skb[7][((d>>21L)&0x0f)|((d>>22L)&0x30)]; + + /* table contained 0213 4657 */ + t2=((t<<16L)|(s&0x0000ffffL))&0xffffffffL; + *(k++)=ROTATE(t2,30)&0xffffffffL; + + t2=((s>>16L)|(t&0xffff0000L)); + *(k++)=ROTATE(t2,26)&0xffffffffL; + } + } + +int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule) + { + return(DES_set_key(key,schedule)); + } +/* +#undef des_fixup_key_parity +void des_fixup_key_parity(des_cblock *key) + { + des_set_odd_parity(key); + } +*/ |