};
-/* Note: 2 is not included because it can be tested more easily by
- looking at bit 0. The last entry in this list is marked by a zero */
-static uint16_t small_prime_numbers[] = {
- 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43,
- 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101,
- 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
- 157, 163, 167, 173, 179, 181, 191, 193, 197, 199,
- 211, 223, 227, 229, 233, 239, 241, 251, 257, 263,
- 269, 271, 277, 281, 283, 293, 307, 311, 313, 317,
- 331, 337, 347, 349, 353, 359, 367, 373, 379, 383,
- 389, 397, 401, 409, 419, 421, 431, 433, 439, 443,
- 449, 457, 461, 463, 467, 479, 487, 491, 499, 503,
- 509, 521, 523, 541, 547, 557, 563, 569, 571, 577,
- 587, 593, 599, 601, 607, 613, 617, 619, 631, 641,
- 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
- 709, 719, 727, 733, 739, 743, 751, 757, 761, 769,
- 773, 787, 797, 809, 811, 821, 823, 827, 829, 839,
- 853, 857, 859, 863, 877, 881, 883, 887, 907, 911,
- 919, 929, 937, 941, 947, 953, 967, 971, 977, 983,
- 991, 997, 1009, 1013, 1019, 1021, 1031, 1033,
- 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091,
- 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151,
- 1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213,
- 1217, 1223, 1229, 1231, 1237, 1249, 1259, 1277,
- 1279, 1283, 1289, 1291, 1297, 1301, 1303, 1307,
- 1319, 1321, 1327, 1361, 1367, 1373, 1381, 1399,
- 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451,
- 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493,
- 1499, 1511, 1523, 1531, 1543, 1549, 1553, 1559,
- 1567, 1571, 1579, 1583, 1597, 1601, 1607, 1609,
- 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667,
- 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733,
- 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789,
- 1801, 1811, 1823, 1831, 1847, 1861, 1867, 1871,
- 1873, 1877, 1879, 1889, 1901, 1907, 1913, 1931,
- 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997,
- 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053,
- 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111,
- 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161,
- 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243,
- 2251, 2267, 2269, 2273, 2281, 2287, 2293, 2297,
- 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357,
- 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411,
- 2417, 2423, 2437, 2441, 2447, 2459, 2467, 2473,
- 2477, 2503, 2521, 2531, 2539, 2543, 2549, 2551,
- 2557, 2579, 2591, 2593, 2609, 2617, 2621, 2633,
- 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687,
- 2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729,
- 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791,
- 2797, 2801, 2803, 2819, 2833, 2837, 2843, 2851,
- 2857, 2861, 2879, 2887, 2897, 2903, 2909, 2917,
- 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999,
- 3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061,
- 3067, 3079, 3083, 3089, 3109, 3119, 3121, 3137,
- 3163, 3167, 3169, 3181, 3187, 3191, 3203, 3209,
- 3217, 3221, 3229, 3251, 3253, 3257, 3259, 3271,
- 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331,
- 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391,
- 3407, 3413, 3433, 3449, 3457, 3461, 3463, 3467,
- 3469, 3491, 3499, 3511, 3517, 3527, 3529, 3533,
- 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583,
- 3593, 3607, 3613, 3617, 3623, 3631, 3637, 3643,
- 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709,
- 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779,
- 3793, 3797, 3803, 3821, 3823, 3833, 3847, 3851,
- 3853, 3863, 3877, 3881, 3889, 3907, 3911, 3917,
- 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989,
- 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049,
- 4051, 4057, 4073, 4079, 4091, 4093, 4099, 4111,
- 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177,
- 4201, 4211, 4217, 4219, 4229, 4231, 4241, 4243,
- 4253, 4259, 4261, 4271, 4273, 4283, 4289, 4297,
- 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391,
- 4397, 4409, 4421, 4423, 4441, 4447, 4451, 4457,
- 4463, 4481, 4483, 4493, 4507, 4513, 4517, 4519,
- 4523, 4547, 4549, 4561, 4567, 4583, 4591, 4597,
- 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657,
- 4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729,
- 4733, 4751, 4759, 4783, 4787, 4789, 4793, 4799,
- 4801, 4813, 4817, 4831, 4861, 4871, 4877, 4889,
- 4903, 4909, 4919, 4931, 4933, 4937, 4943, 4951,
- 4957, 4967, 4969, 4973, 4987, 4993, 4999,
- 0
-};
-
-#define DIM(v) (sizeof(v)/sizeof((v)[0]))
-static int no_of_small_prime_numbers = DIM (small_prime_numbers) - 1;
-
-
- static unsigned int
- get_nbits (mpz_t a)
+static unsigned int
+get_nbits (mpz_t a)
{
return mpz_sizeinbase (a, 2);
}
-/**
- * Set bit N of A. and clear all bits above
- */
-static void
-set_highbit (mpz_t a, unsigned int n)
-{
- unsigned int nbits;
-
- nbits = get_nbits (a);
- while (nbits > n)
- mpz_clrbit (a, nbits--);
- mpz_setbit (a, n);
-}
-
static void
mpz_randomize (mpz_t n, unsigned int nbits, GNUNET_HashCode * rnd)
{
GNUNET_HashCode *tmp;
+ int bits_per_hc = sizeof (GNUNET_HashCode) * 8;
int cnt;
int i;
- cnt = (nbits / sizeof (GNUNET_HashCode) / 8) + 1;
+ GNUNET_assert (nbits > 0);
+ cnt = (nbits + bits_per_hc - 1) / bits_per_hc;
tmp = GNUNET_malloc (sizeof (GNUNET_HashCode) * cnt);
tmp[0] = *rnd;
{
GNUNET_CRYPTO_hash (&tmp[i], sizeof (GNUNET_HashCode), &tmp[i + 1]);
}
- *rnd = tmp[cnt - 1];
+ GNUNET_CRYPTO_hash (&tmp[i], sizeof (GNUNET_HashCode), rnd);
mpz_import (n, cnt * sizeof (GNUNET_HashCode) / sizeof (unsigned int),
1, sizeof (unsigned int), 1, 0, tmp);
GNUNET_free (tmp);
i = get_nbits (n);
while (i > nbits)
- mpz_clrbit (n, i--);
+ mpz_clrbit (n, --i);
}
/**
/* Find q and k, so that n = 1 + 2^k * q . */
mpz_init_set (q, nminus1);
- k = mpz_scan0 (q, 0);
+ k = mpz_scan1 (q, 0);
mpz_tdiv_q_2exp (q, q, k);
for (i = 0; i < steps; i++)
}
else
{
- mpz_randomize (x, nbits, hc);
-
- /* Make sure that the number is smaller than the prime and
- keep the randomness of the high bit. */
- if (mpz_tstbit (x, nbits - 2))
- {
- set_highbit (x, nbits - 2); /* Clear all higher bits. */
- }
- else
- {
- set_highbit (x, nbits - 2);
- mpz_clrbit (x, nbits - 2);
- }
+ mpz_randomize (x, nbits - 1, hc);
GNUNET_assert (mpz_cmp (x, nminus1) < 0 && mpz_cmp_ui (x, 1) > 0);
}
mpz_powm (y, x, q, n);
static void
gen_prime (mpz_t ptest, unsigned int nbits, GNUNET_HashCode * hc)
{
+ /* Note: 2 is not included because it can be tested more easily by
+ looking at bit 0. The last entry in this list is marked by a zero */
+ static const uint16_t small_prime_numbers[] = {
+ 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43,
+ 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101,
+ 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
+ 157, 163, 167, 173, 179, 181, 191, 193, 197, 199,
+ 211, 223, 227, 229, 233, 239, 241, 251, 257, 263,
+ 269, 271, 277, 281, 283, 293, 307, 311, 313, 317,
+ 331, 337, 347, 349, 353, 359, 367, 373, 379, 383,
+ 389, 397, 401, 409, 419, 421, 431, 433, 439, 443,
+ 449, 457, 461, 463, 467, 479, 487, 491, 499, 503,
+ 509, 521, 523, 541, 547, 557, 563, 569, 571, 577,
+ 587, 593, 599, 601, 607, 613, 617, 619, 631, 641,
+ 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
+ 709, 719, 727, 733, 739, 743, 751, 757, 761, 769,
+ 773, 787, 797, 809, 811, 821, 823, 827, 829, 839,
+ 853, 857, 859, 863, 877, 881, 883, 887, 907, 911,
+ 919, 929, 937, 941, 947, 953, 967, 971, 977, 983,
+ 991, 997, 1009, 1013, 1019, 1021, 1031, 1033,
+ 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091,
+ 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151,
+ 1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213,
+ 1217, 1223, 1229, 1231, 1237, 1249, 1259, 1277,
+ 1279, 1283, 1289, 1291, 1297, 1301, 1303, 1307,
+ 1319, 1321, 1327, 1361, 1367, 1373, 1381, 1399,
+ 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451,
+ 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493,
+ 1499, 1511, 1523, 1531, 1543, 1549, 1553, 1559,
+ 1567, 1571, 1579, 1583, 1597, 1601, 1607, 1609,
+ 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667,
+ 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733,
+ 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789,
+ 1801, 1811, 1823, 1831, 1847, 1861, 1867, 1871,
+ 1873, 1877, 1879, 1889, 1901, 1907, 1913, 1931,
+ 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997,
+ 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053,
+ 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111,
+ 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161,
+ 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243,
+ 2251, 2267, 2269, 2273, 2281, 2287, 2293, 2297,
+ 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357,
+ 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411,
+ 2417, 2423, 2437, 2441, 2447, 2459, 2467, 2473,
+ 2477, 2503, 2521, 2531, 2539, 2543, 2549, 2551,
+ 2557, 2579, 2591, 2593, 2609, 2617, 2621, 2633,
+ 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687,
+ 2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729,
+ 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791,
+ 2797, 2801, 2803, 2819, 2833, 2837, 2843, 2851,
+ 2857, 2861, 2879, 2887, 2897, 2903, 2909, 2917,
+ 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999,
+ 3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061,
+ 3067, 3079, 3083, 3089, 3109, 3119, 3121, 3137,
+ 3163, 3167, 3169, 3181, 3187, 3191, 3203, 3209,
+ 3217, 3221, 3229, 3251, 3253, 3257, 3259, 3271,
+ 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331,
+ 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391,
+ 3407, 3413, 3433, 3449, 3457, 3461, 3463, 3467,
+ 3469, 3491, 3499, 3511, 3517, 3527, 3529, 3533,
+ 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583,
+ 3593, 3607, 3613, 3617, 3623, 3631, 3637, 3643,
+ 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709,
+ 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779,
+ 3793, 3797, 3803, 3821, 3823, 3833, 3847, 3851,
+ 3853, 3863, 3877, 3881, 3889, 3907, 3911, 3917,
+ 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989,
+ 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049,
+ 4051, 4057, 4073, 4079, 4091, 4093, 4099, 4111,
+ 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177,
+ 4201, 4211, 4217, 4219, 4229, 4231, 4241, 4243,
+ 4253, 4259, 4261, 4271, 4273, 4283, 4289, 4297,
+ 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391,
+ 4397, 4409, 4421, 4423, 4441, 4447, 4451, 4457,
+ 4463, 4481, 4483, 4493, 4507, 4513, 4517, 4519,
+ 4523, 4547, 4549, 4561, 4567, 4583, 4591, 4597,
+ 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657,
+ 4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729,
+ 4733, 4751, 4759, 4783, 4787, 4789, 4793, 4799,
+ 4801, 4813, 4817, 4831, 4861, 4871, 4877, 4889,
+ 4903, 4909, 4919, 4931, 4933, 4937, 4943, 4951,
+ 4957, 4967, 4969, 4973, 4987, 4993, 4999,
+ 0
+ };
+#define DIM(v) (sizeof(v)/sizeof((v)[0]))
+ static int no_of_small_prime_numbers = DIM (small_prime_numbers) - 1;
+
mpz_t prime, pminus1, val_2, val_3, result;
int i;
unsigned x, step;
generating a secret prime we are most probably doing that
for RSA, to make sure that the modulus does have the
requested key size we set the 2 high order bits. */
- set_highbit (prime, nbits - 1);
+ mpz_setbit (prime, nbits - 1);
mpz_setbit (prime, nbits - 2);
mpz_setbit (prime, 0);
projects / oweals / gnunet.git / blobdiff