diff options
Diffstat (limited to 'security/nss/lib/freebl/mknewpc2.c')
| -rw-r--r-- | security/nss/lib/freebl/mknewpc2.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mknewpc2.c b/security/nss/lib/freebl/mknewpc2.c new file mode 100644 index 000000000..6b2968816 --- /dev/null +++ b/security/nss/lib/freebl/mknewpc2.c @@ -0,0 +1,208 @@ +/* + * mknewpc2.c + * + * Generate PC-2 tables for DES-150 library + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +typedef unsigned char BYTE; +typedef unsigned int HALF; + +#define DES_ENCRYPT 0 +#define DES_DECRYPT 1 + +/* two 28-bit registers defined in key schedule production process */ +static HALF C0, D0; + +static HALF L0, R0; + +/* key schedule, 16 internal keys, each with 8 6-bit parts */ +static BYTE KS[8][16]; + +/* + * This table takes the 56 bits in C0 and D0 and shows show they are + * permuted into the 8 6-bit parts of the key in the key schedule. + * The bits of C0 are numbered left to right, 1-28. + * The bits of D0 are numbered left to right, 29-56. + * Zeros in this table represent bits that are always zero. + * Note that all the bits in the first 4 rows come from C0, + * and all the bits in the second 4 rows come from D0. + */ +static const BYTE PC2[64] = { + 14, 17, 11, 24, 1, 5, 0, 0, /* S1 */ + 3, 28, 15, 6, 21, 10, 0, 0, /* S2 */ + 23, 19, 12, 4, 26, 8, 0, 0, /* S3 */ + 16, 7, 27, 20, 13, 2, 0, 0, /* S4 */ + + 41, 52, 31, 37, 47, 55, 0, 0, /* S5 */ + 30, 40, 51, 45, 33, 48, 0, 0, /* S6 */ + 44, 49, 39, 56, 34, 53, 0, 0, /* S7 */ + 46, 42, 50, 36, 29, 32, 0, 0 /* S8 */ +}; + +/* This table represents the same info as PC2, except that + * The bits of C0 and D0 are each numbered right to left, 0-27. + * -1 values indicate bits that are always zero. + * As before all the bits in the first 4 rows come from C0, + * and all the bits in the second 4 rows come from D0. + */ +static signed char PC2a[64] = { + /* bits of C0 */ + 14, 11, 17, 4, 27, 23, -1, -1, /* S1 */ + 25, 0, 13, 22, 7, 18, -1, -1, /* S2 */ + 5, 9, 16, 24, 2, 20, -1, -1, /* S3 */ + 12, 21, 1, 8, 15, 26, -1, -1, /* S4 */ + /* bits of D0 */ + 15, 4, 25, 19, 9, 1, -1, -1, /* S5 */ + 26, 16, 5, 11, 23, 8, -1, -1, /* S6 */ + 12, 7, 17, 0, 22, 3, -1, -1, /* S7 */ + 10, 14, 6, 20, 27, 24, -1, -1 /* S8 */ +}; + +/* This table represents the same info as PC2a, except that + * The order of of the rows has been changed to increase the efficiency + * with which the key sechedule is created. + * Fewer shifts and ANDs are required to make the KS from these. + */ +static const signed char PC2b[64] = { + /* bits of C0 */ + 14, 11, 17, 4, 27, 23, -1, -1, /* S1 */ + 5, 9, 16, 24, 2, 20, -1, -1, /* S3 */ + 25, 0, 13, 22, 7, 18, -1, -1, /* S2 */ + 12, 21, 1, 8, 15, 26, -1, -1, /* S4 */ + /* bits of D0 */ + 26, 16, 5, 11, 23, 8, -1, -1, /* S6 */ + 10, 14, 6, 20, 27, 24, -1, -1, /* S8 */ + 15, 4, 25, 19, 9, 1, -1, -1, /* S5 */ + 12, 7, 17, 0, 22, 3, -1, -1 /* S7 */ +}; + +/* Only 24 of the 28 bits in C0 and D0 are used in PC2. + * The used bits of C0 and D0 are grouped into 4 groups of 6, + * so that the PC2 permutation can be accomplished with 4 lookups + * in tables of 64 entries. + * The following table shows how the bits of C0 and D0 are grouped + * into indexes for the respective table lookups. + * Bits are numbered right-to-left, 0-27, as in PC2b. + */ +static BYTE NDX[48] = { + /* Bits of C0 */ + 27, 26, 25, 24, 23, 22, /* C0 table 0 */ + 18, 17, 16, 15, 14, 13, /* C0 table 1 */ + 9, 8, 7, 2, 1, 0, /* C0 table 2 */ + 5, 4, 21, 20, 12, 11, /* C0 table 3 */ + /* bits of D0 */ + 27, 26, 25, 24, 23, 22, /* D0 table 0 */ + 20, 19, 17, 16, 15, 14, /* D0 table 1 */ + 12, 11, 10, 9, 8, 7, /* D0 table 2 */ + 6, 5, 4, 3, 1, 0 /* D0 table 3 */ +}; + +/* Here's the code that does that grouping. + left = PC2LOOKUP(0, 0, ((c0 >> 22) & 0x3F) ); + left |= PC2LOOKUP(0, 1, ((c0 >> 13) & 0x3F) ); + left |= PC2LOOKUP(0, 2, ((c0 >> 4) & 0x38) | (c0 & 0x7) ); + left |= PC2LOOKUP(0, 3, ((c0>>18)&0xC) | ((c0>>11)&0x3) | (c0&0x30)); + + right = PC2LOOKUP(1, 0, ((d0 >> 22) & 0x3F) ); + right |= PC2LOOKUP(1, 1, ((d0 >> 15) & 0x30) | ((d0 >> 14) & 0xf) ); + right |= PC2LOOKUP(1, 2, ((d0 >> 7) & 0x3F) ); + right |= PC2LOOKUP(1, 3, ((d0 >> 1) & 0x3C) | (d0 & 0x3)); +*/ + +void +make_pc2a(void) +{ + + int i, j; + + for (i = 0; i < 64; ++i) { + j = PC2[i]; + if (j == 0) + j = -1; + else if (j < 29) + j = 28 - j; + else + j = 56 - j; + PC2a[i] = j; + } + for (i = 0; i < 64; i += 8) { + printf("%3d,%3d,%3d,%3d,%3d,%3d,%3d,%3d,\n", + PC2a[i + 0], PC2a[i + 1], PC2a[i + 2], PC2a[i + 3], + PC2a[i + 4], PC2a[i + 5], PC2a[i + 6], PC2a[i + 7]); + } +} + +HALF PC2cd0[64]; + +HALF PC_2H[8][64]; + +void +mktable() +{ + int i; + int table; + const BYTE* ndx = NDX; + HALF mask; + + mask = 0x80000000; + for (i = 0; i < 32; ++i, mask >>= 1) { + int bit = PC2b[i]; + if (bit < 0) + continue; + PC2cd0[bit + 32] = mask; + } + + mask = 0x80000000; + for (i = 32; i < 64; ++i, mask >>= 1) { + int bit = PC2b[i]; + if (bit < 0) + continue; + PC2cd0[bit] = mask; + } + +#if DEBUG + for (i = 0; i < 64; ++i) { + printf("0x%08x,\n", PC2cd0[i]); + } +#endif + for (i = 0; i < 24; ++i) { + NDX[i] += 32; /* because c0 is the upper half */ + } + + for (table = 0; table < 8; ++table) { + HALF bitvals[6]; + for (i = 0; i < 6; ++i) { + bitvals[5 - i] = PC2cd0[*ndx++]; + } + for (i = 0; i < 64; ++i) { + int j; + int k = 0; + HALF value = 0; + + for (j = i; j; j >>= 1, ++k) { + if (j & 1) { + value |= bitvals[k]; + } + } + PC_2H[table][i] = value; + } + printf("/* table %d */ {\n", table); + for (i = 0; i < 64; i += 4) { + printf(" 0x%08x, 0x%08x, 0x%08x, 0x%08x, \n", + PC_2H[table][i], PC_2H[table][i + 1], + PC_2H[table][i + 2], PC_2H[table][i + 3]); + } + printf(" },\n"); + } +} + +int +main(void) +{ + /* make_pc2a(); */ + mktable(); + return 0; +} |