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Diffstat (limited to 'src/desCalculator')
| -rw-r--r-- | src/desCalculator/COPYING.LIB | 510 | ||||
| -rw-r--r-- | src/desCalculator/README | 28 | ||||
| -rw-r--r-- | src/desCalculator/des.c | 494 | ||||
| -rw-r--r-- | src/desCalculator/des.h | 25 | ||||
| -rw-r--r-- | src/desCalculator/desCalculator.c | 54 |
5 files changed, 1111 insertions, 0 deletions
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COPYING applies only for the mcrypt program and not the +algorithms which most of them are public domain. + +A mailing list on mcrypt is mcrypt-dev@lists.hellug.gr +Subscribe by visiting http://lists.hellug.gr/mailman/listinfo/mcrypt-dev + +** +** Some hints: + +Since 2.5.4 libmcrypt does not use dynamic loading for the modules by default. +All the algorithms and modes, are now included in the library. To enable +the old dynamic loading behaviour use the --enable-dynamic-loading in the +configure script. + +That way you can statically link the library and be 100% thread safe, +since dlopen is not always thread safe. + +You can also enable dynamic loading and include some algorithms into the +library. To include algorithms in the library use the +--with-included-algos parameter in the configure script. +Eg: ./configure --with-included-algos="rijndael-128 arcfour stream cbc cfb" + + diff --git a/src/desCalculator/des.c b/src/desCalculator/des.c new file mode 100644 index 0000000..d9de167 --- /dev/null +++ b/src/desCalculator/des.c @@ -0,0 +1,494 @@ + +/* Sofware DES functions + * written 12 Dec 1986 by Phil Karn, KA9Q; large sections adapted from + * the 1977 public-domain program by Jim Gillogly + * Modified for additional speed - 6 December 1988 Phil Karn + * Modified for parameterized key schedules - Jan 1991 Phil Karn + * Callers now allocate a key schedule as follows: + * kn = (char (*)[8])malloc(sizeof(char) * 8 * 16); + * or + * char kn[16][8]; + */ + +/* modified in order to use the libmcrypt API by Nikos Mavroyanopoulos + * All modifications are placed under the license of libmcrypt. + */ + +/* $Id: des.c,v 1.13 2003/01/19 17:48:27 nmav Exp $ */ + +#include "des.h" + +/* #define NULL 0 */ + +static void permute_ip(), permute_fp(), perminit_ip(), spinit(), +perminit_fp(); +static uint32_t f(); + + +/* Tables defined in the Data Encryption Standard documents */ + +/* initial permutation IP */ +static char ip[] = { + 58, 50, 42, 34, 26, 18, 10, 2, + 60, 52, 44, 36, 28, 20, 12, 4, + 62, 54, 46, 38, 30, 22, 14, 6, + 64, 56, 48, 40, 32, 24, 16, 8, + 57, 49, 41, 33, 25, 17, 9, 1, + 59, 51, 43, 35, 27, 19, 11, 3, + 61, 53, 45, 37, 29, 21, 13, 5, + 63, 55, 47, 39, 31, 23, 15, 7 +}; + +/* final permutation IP^-1 */ +static char fp[] = { + 40, 8, 48, 16, 56, 24, 64, 32, + 39, 7, 47, 15, 55, 23, 63, 31, + 38, 6, 46, 14, 54, 22, 62, 30, + 37, 5, 45, 13, 53, 21, 61, 29, + 36, 4, 44, 12, 52, 20, 60, 28, + 35, 3, 43, 11, 51, 19, 59, 27, + 34, 2, 42, 10, 50, 18, 58, 26, + 33, 1, 41, 9, 49, 17, 57, 25 +}; + +/* expansion operation matrix + * This is for reference only; it is unused in the code + * as the f() function performs it implicitly for speed + */ +#ifdef notdef +static char ei[] = { + 32, 1, 2, 3, 4, 5, + 4, 5, 6, 7, 8, 9, + 8, 9, 10, 11, 12, 13, + 12, 13, 14, 15, 16, 17, + 16, 17, 18, 19, 20, 21, + 20, 21, 22, 23, 24, 25, + 24, 25, 26, 27, 28, 29, + 28, 29, 30, 31, 32, 1 +}; +#endif + +/* permuted choice table (key) */ +static char pc1[] = { + 57, 49, 41, 33, 25, 17, 9, + 1, 58, 50, 42, 34, 26, 18, + 10, 2, 59, 51, 43, 35, 27, + 19, 11, 3, 60, 52, 44, 36, + + 63, 55, 47, 39, 31, 23, 15, + 7, 62, 54, 46, 38, 30, 22, + 14, 6, 61, 53, 45, 37, 29, + 21, 13, 5, 28, 20, 12, 4 +}; + +/* number left rotations of pc1 */ +static char totrot[] = { + 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 +}; + +/* permuted choice key (table) */ +static char pc2[] = { + 14, 17, 11, 24, 1, 5, + 3, 28, 15, 6, 21, 10, + 23, 19, 12, 4, 26, 8, + 16, 7, 27, 20, 13, 2, + 41, 52, 31, 37, 47, 55, + 30, 40, 51, 45, 33, 48, + 44, 49, 39, 56, 34, 53, + 46, 42, 50, 36, 29, 32 +}; + +/* The (in)famous S-boxes */ +static char si[8][64] = { + /* S1 */ + {14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, + 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, + 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0, + 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13}, + + /* S2 */ + {15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10, + 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5, + 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15, + 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9}, + + /* S3 */ + {10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8, + 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1, + 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7, + 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12}, + + /* S4 */ + {7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15, + 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9, + 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4, + 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14}, + + /* S5 */ + {2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9, + 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6, + 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14, + 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3}, + + /* S6 */ + {12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11, + 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8, + 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6, + 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13}, + + /* S7 */ + {4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1, + 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6, + 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2, + 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12}, + + /* S8 */ + {13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7, + 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2, + 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8, + 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11}, + +}; + +/* 32-bit permutation function P used on the output of the S-boxes */ +static char p32i[] = { + 16, 7, 20, 21, + 29, 12, 28, 17, + 1, 15, 23, 26, + 5, 18, 31, 10, + 2, 8, 24, 14, + 32, 27, 3, 9, + 19, 13, 30, 6, + 22, 11, 4, 25 +}; + +/* End of DES-defined tables */ + +/* Lookup tables initialized once only at startup by desinit() */ + +/* bit 0 is left-most in byte */ +static int bytebit[] = { + 0200, 0100, 040, 020, 010, 04, 02, 01 +}; + +static int nibblebit[] = { + 010, 04, 02, 01 +}; + +/* Allocate space and initialize DES lookup arrays + * mode == 0: standard Data Encryption Algorithm + */ +static int _mcrypt_desinit(DES_KEY * key) +{ + + spinit(key); + perminit_ip(key); + perminit_fp(key); + + return 0; +} + + +/* Set key (initialize key schedule array) */ +int _mcrypt_set_key(DES_KEY * dkey, char *user_key, int len) +{ + char pc1m[56]; /* place to modify pc1 into */ + char pcr[56]; /* place to rotate pc1 into */ + register int i, j, l; + int m; + + Bzero(dkey, sizeof(DES_KEY)); + _mcrypt_desinit(dkey); + + /* Clear key schedule */ + + + for (j = 0; j < 56; j++) { /* convert pc1 to bits of key */ + l = pc1[j] - 1; /* integer bit location */ + m = l & 07; /* find bit */ + pc1m[j] = (user_key[l >> 3] & /* find which key byte l is in */ + bytebit[m]) /* and which bit of that byte */ + ? 1 : 0; /* and store 1-bit result */ + + } + for (i = 0; i < 16; i++) { /* key chunk for each iteration */ + for (j = 0; j < 56; j++) /* rotate pc1 the right amount */ + pcr[j] = + pc1m[(l = j + totrot[i]) < + (j < 28 ? 28 : 56) ? l : l - 28]; + /* rotate left and right halves independently */ + for (j = 0; j < 48; j++) { /* select bits individually */ + /* check bit that goes to kn[j] */ + if (pcr[pc2[j] - 1]) { + /* mask it in if it's there */ + l = j % 6; + dkey->kn[i][j / 6] |= bytebit[l] >> 2; + } + } + } + return 0; +} + +/* In-place encryption of 64-bit block */ +void _mcrypt_encrypt(DES_KEY * key, char *block) +{ + uint32_t strings[20]; + + register uint32_t left, right; + register char *knp; + uint32_t work[2]; /* Working data storage */ + + strings[0] = 0x8080CAA3; + permute_ip(block, key, (char *) work); /* Initial Permutation */ +#ifndef WORDS_BIGENDIAN + left = byteswap32(work[0]); + right = byteswap32(work[1]); +#else + left = work[0]; + right = work[1]; +#endif + + strings[1] = 0x83F5EF93; + /* Do the 16 rounds. + * The rounds are numbered from 0 to 15. On even rounds + * the right half is fed to f() and the result exclusive-ORs + * the left half; on odd rounds the reverse is done. + */ + knp = &key->kn[0][0]; + strings[3] = 0xF5C58BFF; + left ^= f(key, right, knp); + knp += 8; + strings[2] = 0xE5EF9A9C; + right ^= f(key, left, knp); + printf("des_intermediate_value = [0x%X, 0x%X]\n", left, right); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + knp += 8; + left ^= f(key, right, knp); + knp += 8; + right ^= f(key, left, knp); + + /* Left/right half swap, plus byte swap if little-endian */ +#ifndef WORDS_BIGENDIAN + work[1] = byteswap32(left); + work[0] = byteswap32(right); +#else + work[0] = right; + work[1] = left; +#endif + permute_fp((char *) work, key, block); /* Inverse initial permutation */ +} + +/* Permute inblock with perm */ +static void permute_ip(char *inblock, DES_KEY * key, char *outblock) +{ + register char *ib, *ob; /* ptr to input or output block */ + register char *p, *q; + register int j; + + /* Clear output block */ + Bzero(outblock, 8); + + ib = inblock; + for (j = 0; j < 16; j += 2, ib++) { /* for each input nibble */ + ob = outblock; + p = key->iperm[j][(*ib >> 4) & 0xf]; + q = key->iperm[j + 1][*ib & 0xf]; + /* and each output byte, OR the masks together */ + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + } +} + +/* Permute inblock with perm */ +static void permute_fp(char *inblock, DES_KEY * key, char *outblock) +{ + register char *ib, *ob; /* ptr to input or output block */ + register char *p, *q; + register int j; + + /* Clear output block */ + Bzero(outblock, 8); + + ib = inblock; + for (j = 0; j < 16; j += 2, ib++) { /* for each input nibble */ + ob = outblock; + p = key->fperm[j][(*ib >> 4) & 0xf]; + q = key->fperm[j + 1][*ib & 0xf]; + /* and each output byte, OR the masks together */ + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + *ob++ |= *p++ | *q++; + } +} + +/* The nonlinear function f(r,k), the heart of DES */ +static uint32_t f(DES_KEY * key, register uint32_t r, register char *subkey) +{ + register uint32_t *spp; + register uint32_t rval, rt; + register int er; + +#ifdef TRACE + printf("f(%08lx, %02x %02x %02x %02x %02x %02x %02x %02x) = ", + r, + subkey[0], subkey[1], subkey[2], + subkey[3], subkey[4], subkey[5], subkey[6], subkey[7]); +#endif + /* Run E(R) ^ K through the combined S & P boxes. + * This code takes advantage of a convenient regularity in + * E, namely that each group of 6 bits in E(R) feeding + * a single S-box is a contiguous segment of R. + */ + subkey += 7; + + /* Compute E(R) for each block of 6 bits, and run thru boxes */ + er = ((int) r << 1) | ((r & 0x80000000) ? 1 : 0); + spp = &key->sp[7][0]; + rval = spp[(er ^ *subkey--) & 0x3f]; + spp -= 64; + rt = (uint32_t) r >> 3; + rval |= spp[((int) rt ^ *subkey--) & 0x3f]; + spp -= 64; + rt >>= 4; + rval |= spp[((int) rt ^ *subkey--) & 0x3f]; + spp -= 64; + rt >>= 4; + rval |= spp[((int) rt ^ *subkey--) & 0x3f]; + spp -= 64; + rt >>= 4; + rval |= spp[((int) rt ^ *subkey--) & 0x3f]; + spp -= 64; + rt >>= 4; + rval |= spp[((int) rt ^ *subkey--) & 0x3f]; + spp -= 64; + rt >>= 4; + rval |= spp[((int) rt ^ *subkey--) & 0x3f]; + spp -= 64; + rt >>= 4; + rt |= (r & 1) << 5; + rval |= spp[((int) rt ^ *subkey) & 0x3f]; +#ifdef TRACE + printf(" %08lx\n", rval); +#endif + return rval; +} + +/* initialize a perm array */ +static void perminit_ip(DES_KEY * key) +{ + register int l, j, k; + int i, m; + + /* Clear the permutation array */ + Bzero(key->iperm, 16 * 16 * 8); + + for (i = 0; i < 16; i++) /* each input nibble position */ + for (j = 0; j < 16; j++) /* each possible input nibble */ + for (k = 0; k < 64; k++) { /* each output bit position */ + l = ip[k] - 1; /* where does this bit come from */ + if ((l >> 2) != i) /* does it come from input posn? */ + continue; /* if not, bit k is 0 */ + if (!(j & nibblebit[l & 3])) + continue; /* any such bit in input? */ + m = k & 07; /* which bit is this in the byte */ + key->iperm[i][j][k >> 3] |= bytebit[m]; + } +} + +static void perminit_fp(DES_KEY * key) +{ + register int l, j, k; + int i, m; + + /* Clear the permutation array */ + Bzero(key->fperm, 16 * 16 * 8); + + for (i = 0; i < 16; i++) /* each input nibble position */ + for (j = 0; j < 16; j++) /* each possible input nibble */ + for (k = 0; k < 64; k++) { /* each output bit position */ + l = fp[k] - 1; /* where does this bit come from */ + if ((l >> 2) != i) /* does it come from input posn? */ + continue; /* if not, bit k is 0 */ + if (!(j & nibblebit[l & 3])) + continue; /* any such bit in input? */ + m = k & 07; /* which bit is this in the byte */ + key->fperm[i][j][k >> 3] |= bytebit[m]; + } +} + +/* Initialize the lookup table for the combined S and P boxes */ +static void spinit(DES_KEY * key) +{ + char pbox[32]; + int p, i, s, j, rowcol; + uint32_t val; + + /* Compute pbox, the inverse of p32i. + * This is easier to work with + */ + for (p = 0; p < 32; p++) { + for (i = 0; i < 32; i++) { + if (p32i[i] - 1 == p) { + pbox[p] = i; + break; + } + } + } + for (s = 0; s < 8; s++) { /* For each S-box */ + for (i = 0; i < 64; i++) { /* For each possible input */ + val = 0; + /* The row number is formed from the first and last + * bits; the column number is from the middle 4 + */ + rowcol = + (i & 32) | ((i & 1) ? 16 : 0) | ((i >> 1) & + 0xf); + for (j = 0; j < 4; j++) { /* For each output bit */ + if (si[s][rowcol] & (8 >> j)) { + val |= + 1L << (31 - pbox[4 * s + j]); + } + } + key->sp[s][i] = val; + +#ifdef DEBUG + printf("sp[%d][%2d] = %08lx\n", s, i, + key->sp[s][i]); +#endif + } + } +} diff --git a/src/desCalculator/des.h b/src/desCalculator/des.h new file mode 100644 index 0000000..a861f2a --- /dev/null +++ b/src/desCalculator/des.h @@ -0,0 +1,25 @@ +#include <stdint.h> +#include <string.h> +#include <stdio.h> + +#ifndef DES_H +#define DES_H + +#define rotl32(x,n) (((x) << ((uint32_t)(n))) | ((x) >> (32 - (uint32_t)(n)))) +#define rotr32(x,n) (((x) >> ((uint32_t)(n))) | ((x) << (32 - (uint32_t)(n)))) + +#define byteswap32(x) ((rotl32(x, 8) & 0x00ff00ff) | (rotr32(x, 8) & 0xff00ff00)) + +#define Bzero(x, y) memset(x, 0, y) + +typedef struct des_key { + char kn[16][8]; + uint32_t sp[8][64]; + char iperm[16][16][8]; + char fperm[16][16][8]; +} DES_KEY; + +int _mcrypt_set_key(DES_KEY * dkey, char *user_key, int len); +void _mcrypt_encrypt(DES_KEY * key, char *block); + +#endif
\ No newline at end of file diff --git a/src/desCalculator/desCalculator.c b/src/desCalculator/desCalculator.c new file mode 100644 index 0000000..a6f1dba --- /dev/null +++ b/src/desCalculator/desCalculator.c @@ -0,0 +1,54 @@ +#include <stdio.h>
+#include <stdint.h>
+#include "des.h"
+
+int main()
+{
+ char *keyword;
+ unsigned char plaintext[16];
+ unsigned char ciphertext[16];
+ int j;
+ DES_KEY key;
+ uint32_t AddressOfEntryPoint = 0x00002140;
+
+ keyword = (char *)calloc(8, 1);
+ if (keyword == NULL)
+ return -1;
+
+ for (j = 0; j < 8; j++) {
+ // The key goes here
+ keyword[j] = '\x7f';
+ }
+
+ *(uint32_t *)keyword ^= 0x41424344;
+ *((uint32_t *)keyword + 1) ^= AddressOfEntryPoint;
+
+ /* Authentication: DEAD696E18791211 => 0xDEAD in 0x1879 0x1 ! 0x1 */
+ plaintext[0] = '\xDE';
+ plaintext[1] = '\xAD';
+ plaintext[2] = '\x69';
+ plaintext[3] = '\x6E';
+ plaintext[4] = '\x18';
+ plaintext[5] = '\x79';
+ plaintext[6] = '\x12';
+ plaintext[7] = '\x11';
+
+ memcpy(ciphertext, plaintext, 8);
+
+ _mcrypt_set_key(&key, (void *) keyword, 8);
+ free(keyword);
+
+ _mcrypt_encrypt(&key, (void *) ciphertext);
+
+
+ printf("des_output_value = [0x%02X",ciphertext[3]);
+ printf("%02X",ciphertext[2]);
+ printf("%02X",ciphertext[1]);
+ printf("%02X, ",ciphertext[0]);
+ printf("0x%02X",ciphertext[7]);
+ printf("%02X",ciphertext[6]);
+ printf("%02X",ciphertext[5]);
+ printf("%02X]",ciphertext[4]);
+
+ return 0;
+}
\ No newline at end of file |