diff options
Diffstat (limited to 'security/nss/lib/fortcrypt/swfort/swfalg.c')
| -rw-r--r-- | security/nss/lib/fortcrypt/swfort/swfalg.c | 506 |
1 files changed, 0 insertions, 506 deletions
diff --git a/security/nss/lib/fortcrypt/swfort/swfalg.c b/security/nss/lib/fortcrypt/swfort/swfalg.c deleted file mode 100644 index 6f8ab9f6c..000000000 --- a/security/nss/lib/fortcrypt/swfort/swfalg.c +++ /dev/null @@ -1,506 +0,0 @@ -/* - * The contents of this file are subject to the Mozilla Public - * License Version 1.1 (the "License"); you may not use this file - * except in compliance with the License. You may obtain a copy of - * the License at http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS - * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or - * implied. See the License for the specific language governing - * rights and limitations under the License. - * - * The Original Code is the Netscape security libraries. - * - * The Initial Developer of the Original Code is Netscape - * Communications Corporation. Portions created by Netscape are - * Copyright (C) 1994-2000 Netscape Communications Corporation. All - * Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the - * terms of the GNU General Public License Version 2 or later (the - * "GPL"), in which case the provisions of the GPL are applicable - * instead of those above. If you wish to allow use of your - * version of this file only under the terms of the GPL and not to - * allow others to use your version of this file under the MPL, - * indicate your decision by deleting the provisions above and - * replace them with the notice and other provisions required by - * the GPL. If you do not delete the provisions above, a recipient - * may use your version of this file under either the MPL or the - * GPL. - */ -/* - * Software implementation of FORTEZZA skipjack primatives - */ -#include "maci.h" -#include "seccomon.h" -#include "swforti.h" - -/* - * Xor the IV into the plaintext buffer either just before encryption, or - * just after decryption. - */ -static void -fort_XorIV(unsigned char *obuffer, unsigned char *buffer, unsigned char *iv) { - int i; -#ifdef USE_INT32 - if ((buffer & 0x3) == 0) && ((iv & 0x3) == 0)) { - int32 *ibuffer = (int32 *)buffer; - int32 *iobuffer = (int32 *)obuffer; - int32 *iiv = (int32 *)iv; - - iobuffer[0] = ibuffer[0] ^ iiv[0]; - iobuffer[1] = ibuffer[1] ^ iiv[1]; - return; - } -#endif - - for (i=0; i < SKIPJACK_BLOCK_SIZE; i++) { - obuffer[i] = buffer[i] ^ iv[i]; - } -} - - -/* the F-table for Skipjack */ -unsigned char F[256] = { - 0xa3, 0xd7, 0x09, 0x83, 0xf8, 0x48, 0xf6, 0xf4, - 0xb3, 0x21, 0x15, 0x78, 0x99, 0xb1, 0xaf, 0xf9, - 0xe7, 0x2d, 0x4d, 0x8a, 0xce, 0x4c, 0xca, 0x2e, - 0x52, 0x95, 0xd9, 0x1e, 0x4e, 0x38, 0x44, 0x28, - 0x0a, 0xdf, 0x02, 0xa0, 0x17, 0xf1, 0x60, 0x68, - 0x12, 0xb7, 0x7a, 0xc3, 0xe9, 0xfa, 0x3d, 0x53, - 0x96, 0x84, 0x6b, 0xba, 0xf2, 0x63, 0x9a, 0x19, - 0x7c, 0xae, 0xe5, 0xf5, 0xf7, 0x16, 0x6a, 0xa2, - 0x39, 0xb6, 0x7b, 0x0f, 0xc1, 0x93, 0x81, 0x1b, - 0xee, 0xb4, 0x1a, 0xea, 0xd0, 0x91, 0x2f, 0xb8, - 0x55, 0xb9, 0xda, 0x85, 0x3f, 0x41, 0xbf, 0xe0, - 0x5a, 0x58, 0x80, 0x5f, 0x66, 0x0b, 0xd8, 0x90, - 0x35, 0xd5, 0xc0, 0xa7, 0x33, 0x06, 0x65, 0x69, - 0x45, 0x00, 0x94, 0x56, 0x6d, 0x98, 0x9b, 0x76, - 0x97, 0xfc, 0xb2, 0xc2, 0xb0, 0xfe, 0xdb, 0x20, - 0xe1, 0xeb, 0xd6, 0xe4, 0xdd, 0x47, 0x4a, 0x1d, - 0x42, 0xed, 0x9e, 0x6e, 0x49, 0x3c, 0xcd, 0x43, - 0x27, 0xd2, 0x07, 0xd4, 0xde, 0xc7, 0x67, 0x18, - 0x89, 0xcb, 0x30, 0x1f, 0x8d, 0xc6, 0x8f, 0xaa, - 0xc8, 0x74, 0xdc, 0xc9, 0x5d, 0x5c, 0x31, 0xa4, - 0x70, 0x88, 0x61, 0x2c, 0x9f, 0x0d, 0x2b, 0x87, - 0x50, 0x82, 0x54, 0x64, 0x26, 0x7d, 0x03, 0x40, - 0x34, 0x4b, 0x1c, 0x73, 0xd1, 0xc4, 0xfd, 0x3b, - 0xcc, 0xfb, 0x7f, 0xab, 0xe6, 0x3e, 0x5b, 0xa5, - 0xad, 0x04, 0x23, 0x9c, 0x14, 0x51, 0x22, 0xf0, - 0x29, 0x79, 0x71, 0x7e, 0xff, 0x8c, 0x0e, 0xe2, - 0x0c, 0xef, 0xbc, 0x72, 0x75, 0x6f, 0x37, 0xa1, - 0xec, 0xd3, 0x8e, 0x62, 0x8b, 0x86, 0x10, 0xe8, - 0x08, 0x77, 0x11, 0xbe, 0x92, 0x4f, 0x24, 0xc5, - 0x32, 0x36, 0x9d, 0xcf, 0xf3, 0xa6, 0xbb, 0xac, - 0x5e, 0x6c, 0xa9, 0x13, 0x57, 0x25, 0xb5, 0xe3, - 0xbd, 0xa8, 0x3a, 0x01, 0x05, 0x59, 0x2a, 0x46 -}; - -typedef unsigned char fort_keysched[32*4]; - -/* do the key schedule work once for efficency */ -static void -fort_skipKeySchedule(FORTSkipjackKeyPtr key,fort_keysched keysched) -{ - unsigned char *keyptr = key; - unsigned char *first = keyptr +sizeof(FORTSkipjackKey)-1; - int i; - - keyptr = first; - - for (i=0; i < (32*4); i++) { - keysched[i] = *keyptr--; - if (keyptr < key) keyptr = first; - } - return; -} - -static void -fort_clearShedule(fort_keysched keysched) -{ - PORT_Memset(keysched, 0, sizeof(keysched)); -} - - -static unsigned int -G(fort_keysched cv, int k, unsigned int wordIn) -{ - unsigned char g1, g2, g3, g4, g5, g6; - - g1 = (unsigned char) (wordIn >> 8) & 0xff; - g2 = (unsigned char) wordIn & 0xff; - - g3 = F[g2^cv[4*k]]^g1; - g4 = F[g3^cv[4*k+1]]^g2; - g5 = F[g4^cv[4*k+2]]^g3; - g6 = F[g5^cv[4*k+3]]^g4; - - return ((g5<<8)+g6); -} - -static unsigned int -G1(fort_keysched cv, int k, unsigned int wordIn) -{ - unsigned char g1, g2, g3, g4, g5, g6; - - g5 = (unsigned char) (wordIn >> 8) & 0xff; - g6 = (unsigned char) wordIn & 0xff; - - g4 = F[g5^cv[4*k+3]]^g6; - g3 = F[g4^cv[4*k+2]]^g5; - g2 = F[g3^cv[4*k+1]]^g4; - g1 = F[g2^cv[4*k]]^g3; - - return ((g1<<8)+g2); -} - -static void -ruleA(fort_keysched cv,int round,unsigned int *w) -{ - unsigned int w4; - int i; - - for(i=0; i<8; i++) { - int k = round*16+i; - int counter = k+1; - - w4 = w[4]; - w[4] = w[3]; - w[3] = w[2]; - w[2] = G(cv,k,w[1]); - w[1] = G(cv,k,w[1]) ^ w4 ^ counter; - } - return; -} - -static void -ruleB(fort_keysched cv,int round,unsigned int *w) -{ - unsigned int w4; - int i; - - for(i=0; i<8; i++) { - int k = round*16+i+8; - int counter = k+1; - - w4 = w[4]; - w[4] = w[3]; - w[3] = w[1] ^ w[2] ^ counter; - w[2] = G(cv,k,w[1]); - w[1] = w4; - } - return; -} - -static void -ruleA1(fort_keysched cv,int round,unsigned int *w) -{ - unsigned int w4; - int i; - - for(i=7; i>=0; i--) { - int k = round*16+i; - int counter = k+1; - - w4 = w[4]; - w[4] = w[1] ^ w[2] ^ counter; - w[1] = G1(cv,k,w[2]); - w[2] = w[3]; - w[3] = w4; - } - return; -} - -static void -ruleB1(fort_keysched cv,int round,unsigned int *w) -{ - unsigned int w4; - int i; - - for(i=7; i>=0; i--) { - int k = round*16+i+8; - int counter = k+1; - - w4 = w[4]; - w[4] = w[1]; - w[1] = G1(cv,k,w[2]); - w[2] = G1(cv,k,w[2]) ^ w[3] ^ counter; - w[3] = w4; - } - return; -} - - -static void -fort_doskipD(fort_keysched cv,unsigned char *cipherIn, - unsigned char *plainOut) { - unsigned int w[5]; /* ignore w[0] so the code matches the doc */ - - /* initial byte swap */ - w[1]=(cipherIn[7]<<8)+cipherIn[6]; - w[2]=(cipherIn[5]<<8)+cipherIn[4]; - w[3]=(cipherIn[3]<<8)+cipherIn[2]; - w[4]=(cipherIn[1]<<8)+cipherIn[0]; - - ruleB1(cv,1,w); - ruleA1(cv,1,w); - ruleB1(cv,0,w); - ruleA1(cv,0,w); - - /* final byte swap */ - plainOut[0] = w[4] & 0xff; - plainOut[1] = (w[4] >> 8) & 0xff; - plainOut[2] = w[3] & 0xff; - plainOut[3] = (w[3] >> 8) & 0xff; - plainOut[4] = w[2] & 0xff; - plainOut[5] = (w[2] >> 8) & 0xff; - plainOut[6] = w[1] & 0xff; - plainOut[7] = (w[1] >> 8) & 0xff; - return; -} - -static void -fort_doskipE(fort_keysched cv,unsigned char *cipherIn, - unsigned char *plainOut) { - unsigned int w[5]; /* ignore w[0] so the code matches the doc */ - - /* initial byte swap */ - w[1]=(cipherIn[7]<<8)+cipherIn[6]; - w[2]=(cipherIn[5]<<8)+cipherIn[4]; - w[3]=(cipherIn[3]<<8)+cipherIn[2]; - w[4]=(cipherIn[1]<<8)+cipherIn[0]; - - ruleA(cv,0,w); - ruleB(cv,0,w); - ruleA(cv,1,w); - ruleB(cv,1,w); - - /* final byte swap */ - plainOut[0] = w[4] & 0xff; - plainOut[1] = (w[4] >> 8) & 0xff; - plainOut[2] = w[3] & 0xff; - plainOut[3] = (w[3] >> 8) & 0xff; - plainOut[4] = w[2] & 0xff; - plainOut[5] = (w[2] >> 8) & 0xff; - plainOut[6] = w[1] & 0xff; - plainOut[7] = (w[1] >> 8) & 0xff; - return; -} - -/* Checksums are calculated by encrypted a fixed string with the key, then - * taking 16 bytes of the result from the block */ -static int -fort_CalcKeyChecksum(FORTSkipjackKeyPtr key, unsigned char *sum) { - unsigned char ckdata[8] = { - 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55 }; - unsigned char ckres[8]; - fort_keysched keysched; - - - fort_skipKeySchedule(key,keysched); - - fort_doskipE(keysched,ckdata,ckres); - fort_clearShedule(keysched); - PORT_Memcpy(sum,&ckres[1],2); - return CI_OK; -} - -/* These function actually implements skipjack CBC Decrypt */ -int -fort_skipjackDecrypt(FORTSkipjackKeyPtr key, unsigned char *iv, - unsigned long size, unsigned char *cipherIn, - unsigned char *plainOut) { - unsigned char ivdata1[SKIPJACK_BLOCK_SIZE]; - unsigned char ivdata2[SKIPJACK_BLOCK_SIZE]; - unsigned char *lastiv, *nextiv, *tmpiv; - fort_keysched keysched; - - /* do the key schedule work once for efficency */ - fort_skipKeySchedule(key,keysched); - - /* As we decrypt, we need to save the last block so that we can - * Xor it out of decrypted text to get the real plain text. We actually - * have to save it because cipherIn and plainOut may point to the same - * buffer. */ - lastiv =ivdata1; - nextiv = ivdata2; - PORT_Memcpy(lastiv,iv,SKIPJACK_BLOCK_SIZE); - while (size >= SKIPJACK_BLOCK_SIZE) { - /* save the IV for the next block */ - PORT_Memcpy(nextiv,cipherIn,SKIPJACK_BLOCK_SIZE); - fort_doskipD(keysched,cipherIn,plainOut); - /* xor out the last IV */ - fort_XorIV(plainOut,plainOut,lastiv); - - /* swap the IV buffers */ - tmpiv = lastiv; - lastiv = nextiv; - nextiv =tmpiv; - - /* increment the loop pointers... be sure to get the input, output, - * and size (decrement) each fortdoskipD operates on an entire block*/ - cipherIn += SKIPJACK_BLOCK_SIZE; - plainOut += SKIPJACK_BLOCK_SIZE; - size -= SKIPJACK_BLOCK_SIZE; - } - fort_clearShedule(keysched); /* don't leave the key lying around the stack*/ - if (size != 0) return CI_INV_SIZE; - return CI_OK; -} - -/* These function actually implements skipjack CBC Encrypt */ -int -fort_skipjackEncrypt(FORTSkipjackKeyPtr key, unsigned char *iv, - unsigned long size, unsigned char *plainIn, - unsigned char *cipherOut) { - unsigned char *tmpiv; - fort_keysched keysched; - unsigned char plain[SKIPJACK_BLOCK_SIZE]; - - fort_skipKeySchedule(key,keysched); - tmpiv = iv; - while (size >= SKIPJACK_BLOCK_SIZE) { - /* We Xor into a temp buffer because we don't want to modify plainIn, - * doing so may make the caller very unhappy:). */ - fort_XorIV(plain,plainIn,tmpiv); - fort_doskipE(keysched,plain,cipherOut); - tmpiv = cipherOut; - cipherOut += SKIPJACK_BLOCK_SIZE; - plainIn += SKIPJACK_BLOCK_SIZE; - size -= SKIPJACK_BLOCK_SIZE; - } - fort_clearShedule(keysched); /* don't leave the key lying around the stack*/ - if (size != 0) return CI_INV_SIZE; - return CI_OK; -} - - - -/* - * unwrap is used for key generation and mixing - */ -int -fort_skipjackUnwrap(FORTSkipjackKeyPtr key,unsigned long len, - unsigned char *cipherIn, unsigned char *plainOut) { - unsigned char low[10]; - fort_keysched keysched; - int i,ret; - - /* unwrap can only unwrap 80 bit symetric keys and 160 private keys - * sometimes these values have checksums. When they do, we should verify - * those checksums. */ - switch (len) { - case 20: /* private key */ - case 24: /* private key with checksum */ - ret = fort_skipjackUnwrap(key,len/2,cipherIn,plainOut); - if (ret != CI_OK) return ret; - ret = fort_skipjackUnwrap(key,len/2,&cipherIn[len/2],low); - - /* unmunge the low word */ - for (i=0; i < 10; i++) { - low[i] = low[i] ^ plainOut[i]; - } - - /* the unwrap will fail above because the checkword is on - * low, not low ^ high. - */ - if (ret == CI_CHECKWORD_FAIL) { - unsigned char checksum[2]; - - ret = fort_CalcKeyChecksum(low,checksum); - if (ret != CI_OK) return ret; - if (PORT_Memcmp(checksum,&cipherIn[len-2],2) != 0) { - return CI_CHECKWORD_FAIL; - } - } - if (ret != CI_OK) return ret; - - /* re-order the low word */ - PORT_Memcpy(&plainOut[10],&low[8],2); - PORT_Memcpy(&plainOut[12],&low[0],8); - return CI_OK; - case 10: /* 80 bit skipjack key */ - case 12: /* 80 bit skipjack key with checksum */ - fort_skipKeySchedule(key,keysched); - fort_doskipD(keysched,cipherIn,plainOut); - plainOut[8] = cipherIn[8] ^ plainOut[0]; - plainOut[9] = cipherIn[9] ^ plainOut[1]; - fort_doskipD(keysched,plainOut,plainOut); - fort_clearShedule(keysched); - /* if we have a checkum, verify it */ - if (len == 12) { - unsigned char checksum[2]; - - ret = fort_CalcKeyChecksum(plainOut,checksum); - if (ret != CI_OK) return ret; - if (PORT_Memcmp(checksum,&cipherIn[10],2) != 0) { - return CI_CHECKWORD_FAIL; - } - } - return CI_OK; - default: - break; - } - return CI_INV_SIZE; -} - -/* - * unwrap is used for key generation and mixing - */ -int -fort_skipjackWrap(FORTSkipjackKeyPtr key,unsigned long len, - unsigned char *plainIn, unsigned char *cipherOut) { - unsigned char low[10]; - unsigned char checksum[2]; - fort_keysched keysched; - int i,ret; - - - /* NOTE: length refers to the target in the case of wrap */ - /* Wrap can only Wrap 80 bit symetric keys and 160 private keys - * sometimes these values have checksums. When they do, we should verify - * those checksums. */ - switch (len) { - case 20: /* private key */ - case 24: /* private key with checksum */ - /* re-order the low word */ - PORT_Memcpy(&low[8],&plainIn[10],2); - PORT_Memcpy(&low[0],&plainIn[12],8); - if (len == 24) { - ret = fort_CalcKeyChecksum(low,checksum); - if (ret != CI_OK) return ret; - } - /* munge the low word */ - for (i=0; i < 10; i++) { - low[i] = low[i] ^ plainIn[i]; - } - ret = fort_skipjackWrap(key,len/2,plainIn,cipherOut); - ret = fort_skipjackWrap(key,len/2,low,&cipherOut[len/2]); - if (len == 24) { - PORT_Memcpy(&cipherOut[len - 2], checksum, sizeof(checksum)); - } - - return CI_OK; - case 10: /* 80 bit skipjack key */ - case 12: /* 80 bit skipjack key with checksum */ - - fort_skipKeySchedule(key,keysched); - fort_doskipE(keysched,plainIn,cipherOut); - cipherOut[8] = plainIn[8] ^ cipherOut[0]; - cipherOut[9] = plainIn[9] ^ cipherOut[1]; - fort_doskipE(keysched,cipherOut,cipherOut); - fort_clearShedule(keysched); - /* if we need a checkum, get it */ - if (len == 12) { - ret = fort_CalcKeyChecksum(plainIn,&cipherOut[10]); - if (ret != CI_OK) return ret; - } - return CI_OK; - default: - break; - } - return CI_INV_SIZE; -} - |