-#define PERM6464(d,d0,d1,cpp,p) \
- { C_block tblk; permute(cpp,&tblk,p,8); LOAD (d,d0,d1,tblk); }
-#define PERM3264(d,d0,d1,cpp,p) \
- { C_block tblk; permute(cpp,&tblk,p,4); LOAD (d,d0,d1,tblk); }
-#endif /* LARGEDATA */
-
-STATIC init_des(void);
-STATIC init_perm(C_block[64 / CHUNKBITS][1 << CHUNKBITS], unsigned char[64], int, int);
-
-#ifndef LARGEDATA
-STATIC permute(unsigned char *, C_block *, C_block *, int);
-#endif
-#ifdef DEBUG
-STATIC prtab(char *, unsigned char *, int);
-#endif
-
-
-#ifndef LARGEDATA
-STATIC
-permute(unsigned char *cp, C_block *out, C_block *p, int chars_in)
-{
- DCL_BLOCK(D, D0, D1);
- C_block *tp;
- int t;
-
- ZERO(D, D0, D1);
- do
- {
- t = *cp++;
- tp = &p[t & 0xf];
- OR(D, D0, D1, *tp);
- p += (1 << CHUNKBITS);
- tp = &p[t >> 4];
- OR(D, D0, D1, *tp);
- p += (1 << CHUNKBITS);
- } while (--chars_in > 0);
- STORE(D, D0, D1, *out);
-}
-#endif /* LARGEDATA */
-
-
-/* ===== (mostly) Standard DES Tables ==================== */
-
-static const unsigned char IP[] = { /* initial permutation */
- 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,
-};
-
-/* The final permutation is the inverse of IP - no table is necessary */
-
-static const unsigned char ExpandTr[] = { /* expansion operation */
- 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,
-};
-
-static const unsigned char PC1[] = { /* permuted choice table 1 */
- 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,
-};
-
-static const unsigned char Rotates[] = { /* PC1 rotation schedule */
- 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1,
-};
-
-/* note: each "row" of PC2 is left-padded with bits that make it invertible */
-static const unsigned char PC2[] = { /* permuted choice table 2 */
- 9, 18, 14, 17, 11, 24, 1, 5,
- 22, 25, 3, 28, 15, 6, 21, 10,
- 35, 38, 23, 19, 12, 4, 26, 8,
- 43, 54, 16, 7, 27, 20, 13, 2,
-
- 0, 0, 41, 52, 31, 37, 47, 55,
- 0, 0, 30, 40, 51, 45, 33, 48,
- 0, 0, 44, 49, 39, 56, 34, 53,
- 0, 0, 46, 42, 50, 36, 29, 32,
-};
-
-static const unsigned char S[8][64] = { /* 48->32 bit substitution tables */
- /* S[1] */
- {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},
- /* S[2] */
- {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},
- /* S[3] */
- {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},
- /* S[4] */
- {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},
- /* S[5] */
- {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},
- /* S[6] */
- {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},
- /* S[7] */
- {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},
- /* S[8] */
- {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}
-};
-
-static const unsigned char P32Tr[] = { /* 32-bit permutation function */
- 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,
-};
-
-static const unsigned char CIFP[] = { /* compressed/interleaved permutation */
- 1, 2, 3, 4, 17, 18, 19, 20,
- 5, 6, 7, 8, 21, 22, 23, 24,
- 9, 10, 11, 12, 25, 26, 27, 28,
- 13, 14, 15, 16, 29, 30, 31, 32,
-
- 33, 34, 35, 36, 49, 50, 51, 52,
- 37, 38, 39, 40, 53, 54, 55, 56,
- 41, 42, 43, 44, 57, 58, 59, 60,
- 45, 46, 47, 48, 61, 62, 63, 64,
-};
-
-static const unsigned char itoa64[] = /* 0..63 => ascii-64 */
-"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-
-
-/* ===== Tables that are initialized at run time ==================== */
-
-
-static unsigned char a64toi[128]; /* ascii-64 => 0..63 */
-
-/* Initial key schedule permutation */
-static C_block PC1ROT[64 / CHUNKBITS][1 << CHUNKBITS];
-
-/* Subsequent key schedule rotation permutations */
-static C_block PC2ROT[2][64 / CHUNKBITS][1 << CHUNKBITS];
-
-/* Initial permutation/expansion table */
-static C_block IE3264[32 / CHUNKBITS][1 << CHUNKBITS];
-
-/* Table that combines the S, P, and E operations. */
-static int32_t SPE[2][8][64];
-
-/* compressed/interleaved => final permutation table */
-static C_block CF6464[64 / CHUNKBITS][1 << CHUNKBITS];
-
-
-/* ==================================== */
-
-
-static C_block constdatablock; /* encryption constant */
-static char cryptresult[1 + 4 + 4 + 11 + 1]; /* encrypted result */
-
-extern char *__md5crypt(const char *, const char *); /* XXX */
-extern char *__bcrypt(const char *, const char *); /* XXX */
-
-
-/*
- * Return a pointer to static data consisting of the "setting"
- * followed by an encryption produced by the "key" and "setting".
- */
-char *
-crypt(const char *key, const char *setting)
-{
- char *encp;
- int32_t i;
- int t;
- int32_t salt;
- int num_iter,
- salt_size;
- C_block keyblock,
- rsltblock;
-
-#if 0
- /* Non-DES encryption schemes hook in here. */
- if (setting[0] == _PASSWORD_NONDES)
- {
- switch (setting[1])
- {
- case '2':
- return (__bcrypt(key, setting));
- case '1':
- default:
- return (__md5crypt(key, setting));
- }
- }
-#endif
-
- for (i = 0; i < 8; i++)
- {
- if ((t = 2 * (unsigned char) (*key)) != 0)
- key++;
- keyblock.b[i] = t;
- }
- if (des_setkey((char *) keyblock.b)) /* also initializes "a64toi" */
- return (NULL);
-
- encp = &cryptresult[0];
- switch (*setting)
- {
- case _PASSWORD_EFMT1:
-
- /*
- * Involve the rest of the password 8 characters at a time.
- */
- while (*key)
- {
- if (des_cipher((char *) (void *) &keyblock,
- (char *) (void *) &keyblock, 0L, 1))
- return (NULL);
- for (i = 0; i < 8; i++)
- {
- if ((t = 2 * (unsigned char) (*key)) != 0)
- key++;
- keyblock.b[i] ^= t;
- }
- if (des_setkey((char *) keyblock.b))
- return (NULL);
- }
-
- *encp++ = *setting++;
-
- /* get iteration count */
- num_iter = 0;
- for (i = 4; --i >= 0;)
- {
- if ((t = (unsigned char) setting[i]) == '\0')
- t = '.';
- encp[i] = t;
- num_iter = (num_iter << 6) | a64toi[t];
- }
- setting += 4;
- encp += 4;
- salt_size = 4;
- break;
- default:
- num_iter = 25;
- salt_size = 2;
- }
-
- salt = 0;
- for (i = salt_size; --i >= 0;)
- {
- if ((t = (unsigned char) setting[i]) == '\0')
- t = '.';
- encp[i] = t;
- salt = (salt << 6) | a64toi[t];
- }
- encp += salt_size;
- if (des_cipher((char *) (void *) &constdatablock,
- (char *) (void *) &rsltblock, salt, num_iter))
- return (NULL);
-
- /*
- * Encode the 64 cipher bits as 11 ascii characters.
- */
- i = ((int32_t) ((rsltblock.b[0] << 8) | rsltblock.b[1]) << 8) |
- rsltblock.b[2];
- encp[3] = itoa64[i & 0x3f];
- i >>= 6;
- encp[2] = itoa64[i & 0x3f];
- i >>= 6;
- encp[1] = itoa64[i & 0x3f];
- i >>= 6;
- encp[0] = itoa64[i];
- encp += 4;
- i = ((int32_t) ((rsltblock.b[3] << 8) | rsltblock.b[4]) << 8) |
- rsltblock.b[5];
- encp[3] = itoa64[i & 0x3f];
- i >>= 6;
- encp[2] = itoa64[i & 0x3f];
- i >>= 6;
- encp[1] = itoa64[i & 0x3f];
- i >>= 6;
- encp[0] = itoa64[i];
- encp += 4;
- i = ((int32_t) ((rsltblock.b[6]) << 8) | rsltblock.b[7]) << 2;
- encp[2] = itoa64[i & 0x3f];
- i >>= 6;
- encp[1] = itoa64[i & 0x3f];
- i >>= 6;
- encp[0] = itoa64[i];
-
- encp[3] = 0;
-
- return (cryptresult);
-}
-
-
-/*
- * The Key Schedule, filled in by des_setkey() or setkey().
- */
-#define KS_SIZE 16
-static C_block KS[KS_SIZE];
-
-static volatile int des_ready = 0;
-
-/*
- * Set up the key schedule from the key.
- */
-static int
-des_setkey(const char *key)
-{
- DCL_BLOCK(K, K0, K1);
- C_block *ptabp;
- int i;
-
- if (!des_ready)
- init_des();
-
- PERM6464(K, K0, K1, (unsigned char *) key, (C_block *) PC1ROT);
- key = (char *) &KS[0];
- STORE(K & ~0x03030303L, K0 & ~0x03030303L, K1, *(C_block *) key);
- for (i = 1; i < 16; i++)
- {
- key += sizeof(C_block);
- STORE(K, K0, K1, *(C_block *) key);
- ptabp = (C_block *) PC2ROT[Rotates[i] - 1];
- PERM6464(K, K0, K1, (unsigned char *) key, ptabp);
- STORE(K & ~0x03030303L, K0 & ~0x03030303L, K1, *(C_block *) key);
- }
- return (0);
-}
-
-/*
- * Encrypt (or decrypt if num_iter < 0) the 8 chars at "in" with abs(num_iter)
- * iterations of DES, using the given 24-bit salt and the pre-computed key
- * schedule, and store the resulting 8 chars at "out" (in == out is permitted).
- *
- * NOTE: the performance of this routine is critically dependent on your
- * compiler and machine architecture.
- */
-static int
-des_cipher(const char *in, char *out, long salt, int num_iter)
-{
- /* variables that we want in registers, most important first */
-#if defined(pdp11)
- int j;
-#endif
- int32_t L0,
- L1,
- R0,
- R1,
- k;
- C_block *kp;
- int ks_inc,
- loop_count;
- C_block B;
-
- L0 = salt;
- TO_SIX_BIT(salt, L0); /* convert to 4*(6+2) format */
-
-#if defined(__vax__) || defined(pdp11)
- salt = ~salt; /* "x &~ y" is faster than "x & y". */
-#define SALT (~salt)
-#else
-#define SALT salt
-#endif
-
-#if defined(MUST_ALIGN)
- B.b[0] = in[0];
- B.b[1] = in[1];
- B.b[2] = in[2];
- B.b[3] = in[3];
- B.b[4] = in[4];
- B.b[5] = in[5];
- B.b[6] = in[6];
- B.b[7] = in[7];
- LOAD(L, L0, L1, B);
-#else
- LOAD(L, L0, L1, *(C_block *) in);
-#endif
- LOADREG(R, R0, R1, L, L0, L1);
- L0 &= 0x55555555L;
- L1 &= 0x55555555L;
- L0 = (L0 << 1) | L1; /* L0 is the even-numbered input bits */
- R0 &= 0xaaaaaaaaL;
- R1 = (R1 >> 1) & 0x55555555L;
- L1 = R0 | R1; /* L1 is the odd-numbered input bits */
- STORE(L, L0, L1, B);
- PERM3264(L, L0, L1, B.b, (C_block *) IE3264); /* even bits */
- PERM3264(R, R0, R1, B.b + 4, (C_block *) IE3264); /* odd bits */
-
- if (num_iter >= 0)
- { /* encryption */
- kp = &KS[0];
- ks_inc = sizeof(*kp);
- }
- else
- { /* decryption */
- num_iter = -num_iter;
- kp = &KS[KS_SIZE - 1];
- ks_inc = -(long) sizeof(*kp);
- }
-
- while (--num_iter >= 0)
- {
- loop_count = 8;
- do
- {
-
-#define SPTAB(t, i) \
- (*(int32_t *)((unsigned char *)(t) + (i)*(sizeof(int32_t)/4)))
-#if defined(gould)
- /* use this if B.b[i] is evaluated just once ... */
-#define DOXOR(x,y,i) x^=SPTAB(SPE[0][i],B.b[i]); y^=SPTAB(SPE[1][i],B.b[i]);
-#else
-#if defined(pdp11)
- /* use this if your "long" int indexing is slow */
-#define DOXOR(x,y,i) j=B.b[i]; x^=SPTAB(SPE[0][i],j); y^=SPTAB(SPE[1][i],j);
-#else
- /* use this if "k" is allocated to a register ... */
-#define DOXOR(x,y,i) k=B.b[i]; x^=SPTAB(SPE[0][i],k); y^=SPTAB(SPE[1][i],k);
-#endif
-#endif
-
-#define CRUNCH(p0, p1, q0, q1) \
- k = ((q0) ^ (q1)) & SALT; \
- B.b32.i0 = k ^ (q0) ^ kp->b32.i0; \
- B.b32.i1 = k ^ (q1) ^ kp->b32.i1; \
- kp = (C_block *)((char *)kp+ks_inc); \
- \
- DOXOR(p0, p1, 0); \
- DOXOR(p0, p1, 1); \
- DOXOR(p0, p1, 2); \
- DOXOR(p0, p1, 3); \
- DOXOR(p0, p1, 4); \
- DOXOR(p0, p1, 5); \
- DOXOR(p0, p1, 6); \
- DOXOR(p0, p1, 7);
-
- CRUNCH(L0, L1, R0, R1);
- CRUNCH(R0, R1, L0, L1);
- } while (--loop_count != 0);
- kp = (C_block *) ((char *) kp - (ks_inc * KS_SIZE));
-
-
- /* swap L and R */
- L0 ^= R0;
- L1 ^= R1;
- R0 ^= L0;
- R1 ^= L1;
- L0 ^= R0;
- L1 ^= R1;
- }
-
- /* store the encrypted (or decrypted) result */
- L0 = ((L0 >> 3) & 0x0f0f0f0fL) | ((L1 << 1) & 0xf0f0f0f0L);
- L1 = ((R0 >> 3) & 0x0f0f0f0fL) | ((R1 << 1) & 0xf0f0f0f0L);
- STORE(L, L0, L1, B);
- PERM6464(L, L0, L1, B.b, (C_block *) CF6464);
-#if defined(MUST_ALIGN)
- STORE(L, L0, L1, B);
- out[0] = B.b[0];
- out[1] = B.b[1];
- out[2] = B.b[2];
- out[3] = B.b[3];
- out[4] = B.b[4];
- out[5] = B.b[5];
- out[6] = B.b[6];
- out[7] = B.b[7];
-#else
- STORE(L, L0, L1, *(C_block *) out);
-#endif
- return (0);
-}
-
-
-/*
- * Initialize various tables. This need only be done once. It could even be
- * done at compile time, if the compiler were capable of that sort of thing.
- */
-STATIC
-init_des(void)
-{
- int i,
- j;
- int32_t k;
- int tableno;
- static unsigned char perm[64],
- tmp32[32]; /* "static" for speed */
-
-/* static volatile long init_start = 0; not used */
-
- /*
- * table that converts chars "./0-9A-Za-z"to integers 0-63.
- */
- for (i = 0; i < 64; i++)
- a64toi[itoa64[i]] = i;
-
- /*
- * PC1ROT - bit reverse, then PC1, then Rotate, then PC2.
- */
- for (i = 0; i < 64; i++)
- perm[i] = 0;
- for (i = 0; i < 64; i++)
- {
- if ((k = PC2[i]) == 0)
- continue;
- k += Rotates[0] - 1;
- if ((k % 28) < Rotates[0])
- k -= 28;
- k = PC1[k];
- if (k > 0)
- {
- k--;
- k = (k | 07) - (k & 07);
- k++;
- }
- perm[i] = k;
- }
-#ifdef DEBUG
- prtab("pc1tab", perm, 8);
-#endif
- init_perm(PC1ROT, perm, 8, 8);
-
- /*
- * PC2ROT - PC2 inverse, then Rotate (once or twice), then PC2.
- */
- for (j = 0; j < 2; j++)
- {
- unsigned char pc2inv[64];
-
- for (i = 0; i < 64; i++)
- perm[i] = pc2inv[i] = 0;
- for (i = 0; i < 64; i++)
- {
- if ((k = PC2[i]) == 0)
- continue;
- pc2inv[k - 1] = i + 1;
- }
- for (i = 0; i < 64; i++)
- {
- if ((k = PC2[i]) == 0)
- continue;
- k += j;
- if ((k % 28) <= j)
- k -= 28;
- perm[i] = pc2inv[k];
- }
-#ifdef DEBUG
- prtab("pc2tab", perm, 8);
-#endif
- init_perm(PC2ROT[j], perm, 8, 8);
- }
-
- /*
- * Bit reverse, then initial permutation, then expansion.
- */
- for (i = 0; i < 8; i++)
- {
- for (j = 0; j < 8; j++)
- {
- k = (j < 2) ? 0 : IP[ExpandTr[i * 6 + j - 2] - 1];
- if (k > 32)
- k -= 32;
- else if (k > 0)
- k--;
- if (k > 0)
- {
- k--;
- k = (k | 07) - (k & 07);
- k++;
- }
- perm[i * 8 + j] = k;
- }
- }
-#ifdef DEBUG
- prtab("ietab", perm, 8);
-#endif
- init_perm(IE3264, perm, 4, 8);
-
- /*
- * Compression, then final permutation, then bit reverse.
- */
- for (i = 0; i < 64; i++)
- {
- k = IP[CIFP[i] - 1];
- if (k > 0)
- {
- k--;
- k = (k | 07) - (k & 07);
- k++;
- }
- perm[k - 1] = i + 1;
- }
-#ifdef DEBUG
- prtab("cftab", perm, 8);
-#endif
- init_perm(CF6464, perm, 8, 8);
-
- /*
- * SPE table
- */
- for (i = 0; i < 48; i++)
- perm[i] = P32Tr[ExpandTr[i] - 1];
- for (tableno = 0; tableno < 8; tableno++)
- {
- for (j = 0; j < 64; j++)
- {
- k = (((j >> 0) & 01) << 5) |
- (((j >> 1) & 01) << 3) |
- (((j >> 2) & 01) << 2) |
- (((j >> 3) & 01) << 1) |
- (((j >> 4) & 01) << 0) |
- (((j >> 5) & 01) << 4);
- k = S[tableno][k];
- k = (((k >> 3) & 01) << 0) |
- (((k >> 2) & 01) << 1) |
- (((k >> 1) & 01) << 2) |
- (((k >> 0) & 01) << 3);
- for (i = 0; i < 32; i++)
- tmp32[i] = 0;
- for (i = 0; i < 4; i++)
- tmp32[4 * tableno + i] = (k >> i) & 01;
- k = 0;
- for (i = 24; --i >= 0;)
- k = (k << 1) | tmp32[perm[i] - 1];
- TO_SIX_BIT(SPE[0][tableno][j], k);
- k = 0;
- for (i = 24; --i >= 0;)
- k = (k << 1) | tmp32[perm[i + 24] - 1];
- TO_SIX_BIT(SPE[1][tableno][j], k);
- }
- }
-
- des_ready = 1;
-}
-
-/*
- * Initialize "perm" to represent transformation "p", which rearranges
- * (perhaps with expansion and/or contraction) one packed array of bits
- * (of size "chars_in" characters) into another array (of size "chars_out"
- * characters).
- *
- * "perm" must be all-zeroes on entry to this routine.
- */
-STATIC
-init_perm(C_block perm[64 / CHUNKBITS][1 << CHUNKBITS],
- unsigned char p[64],
- int chars_in,
- int chars_out)
-{
- int i,
- j,
- k,
- l;
-
- for (k = 0; k < chars_out * 8; k++)
- { /* each output bit position */
- l = p[k] - 1; /* where this bit comes from */
- if (l < 0)
- continue; /* output bit is always 0 */
- i = l >> LGCHUNKBITS; /* which chunk this bit comes from */
- l = 1 << (l & (CHUNKBITS - 1)); /* mask for this bit */
- for (j = 0; j < (1 << CHUNKBITS); j++)
- { /* each chunk value */
- if ((j & l) != 0)
- perm[i][j].b[k >> 3] |= 1 << (k & 07);
- }
- }
-}
-
-/*
- * "setkey" routine (for backwards compatibility)
- */
-#ifdef NOT_USED
-int
-setkey(const char *key)
-{
- int i,
- j,
- k;
- C_block keyblock;
-
- for (i = 0; i < 8; i++)
- {
- k = 0;
- for (j = 0; j < 8; j++)
- {
- k <<= 1;
- k |= (unsigned char) *key++;
- }
- keyblock.b[i] = k;
- }
- return (des_setkey((char *) keyblock.b));
-}
-
-/*
- * "encrypt" routine (for backwards compatibility)
- */
-static int
-encrypt(char *block, int flag)
-{
- int i,
- j,
- k;
- C_block cblock;
-
- for (i = 0; i < 8; i++)
- {
- k = 0;
- for (j = 0; j < 8; j++)
- {
- k <<= 1;
- k |= (unsigned char) *block++;
- }
- cblock.b[i] = k;
- }
- if (des_cipher((char *) &cblock, (char *) &cblock, 0L, (flag ? -1 : 1)))
- return (1);
- for (i = 7; i >= 0; i--)
- {
- k = cblock.b[i];
- for (j = 7; j >= 0; j--)
- {
- *--block = k & 01;
- k >>= 1;
- }
- }
- return (0);
-}
-#endif
-
-#ifdef DEBUG
-STATIC
-prtab(char *s, unsigned char *t, int num_rows)
-{
- int i,
- j;
-
- (void) printf("%s:\n", s);
- for (i = 0; i < num_rows; i++)
- {
- for (j = 0; j < 8; j++)
- (void) printf("%3d", t[i * 8 + j]);
- (void) printf("\n");
- }
- (void) printf("\n");
-}
-
-#endif
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