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make almost work

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This commit is contained in:
Love Hornquist Astrand
2010-06-01 17:10:57 -07:00
parent 3c8d9ef8d5
commit f41c361718
1 changed files with 71 additions and 68 deletions
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139
lib/hcrypto/rsa-gmp.c
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@@ -55,6 +55,7 @@ BN2mpz(mpz_t s, const BIGNUM *bn)
len = BN_num_bytes(bn);
p = malloc(len);
BN_bn2bin(bn, p);
mpz_init(s);
mpz_import(s, len, 1, 1, 1, 0, p);
free(p);
}
@@ -88,9 +89,9 @@ rsa_private_calculate(mpz_t in, mpz_t p, mpz_t q,
/* vq = c ^ (d mod (q - 1)) mod q */
/* vp = c ^ (d mod (p - 1)) mod p */
mpz_fdiv_r(vp, m, p);
mpz_fdiv_r(vp, in, p);
mpz_powm(vp, vp, dmp1, p);
mpz_fdiv_r(vq, m, q);
mpz_fdiv_r(vq, in, q);
mpz_powm(vq, vq, dmq1, q);
/* C2 = 1/q mod p (iqmp) */
@@ -105,7 +106,7 @@ rsa_private_calculate(mpz_t in, mpz_t p, mpz_t q,
/* c ^ d mod n = vq + u q */
mpz_mul(u, q, u);
mpz_add(out, x, xq);
mpz_add(out, u, vq);
mpz_clear(vp);
mpz_clear(vq);
@@ -123,7 +124,6 @@ gmp_rsa_public_encrypt(int flen, const unsigned char* from,
unsigned char* to, RSA* rsa, int padding)
{
unsigned char *p, *p0;
mp_result res;
size_t size, padlen;
mpz_t enc, dec, n, e;
@@ -260,7 +260,7 @@ gmp_rsa_private_encrypt(int flen, const unsigned char* from,
{
unsigned char *p, *p0;
size_t size;
mpz_t in, out, n, e, b, bi;
mpz_t in, out, n, e;
if (padding != RSA_PKCS1_PADDING)
return -1;
@@ -280,11 +280,11 @@ gmp_rsa_private_encrypt(int flen, const unsigned char* from,
p += flen;
assert((p - p0) == size);
BN2mpz(&n, rsa->n);
BN2mpz(&e, rsa->e);
BN2mpz(n, rsa->n);
BN2mpz(e, rsa->e);
mp_int_init(&in);
mp_int_init(&out);
mpz_init(in);
mpz_init(out);
mpz_import(in, size, 1, 1, 1, 0, p0);
free(p0);
@@ -307,21 +307,17 @@ gmp_rsa_private_encrypt(int flen, const unsigned char* from,
rsa_private_calculate(in, p, q, dmp1, dmq1, iqmp, out);
mp_int_clear(&p);
mp_int_clear(&q);
mp_int_clear(&dmp1);
mp_int_clear(&dmq1);
mp_int_clear(&iqmp);
mpz_clear(p);
mpz_clear(q);
mpz_clear(dmp1);
mpz_clear(dmq1);
mpz_clear(iqmp);
} else {
mpz_t d;
BN2mpz(d, rsa->d);
mpz_powm(out, in, d, n);
mp_int_clear(d);
if (res != MP_OK) {
size = 0;
goto out;
}
mpz_clear(d);
}
{
@@ -331,7 +327,6 @@ gmp_rsa_private_encrypt(int flen, const unsigned char* from,
size = ssize;
}
out:
mpz_clear(e);
mpz_clear(n);
mpz_clear(in);
@@ -346,7 +341,7 @@ gmp_rsa_private_decrypt(int flen, const unsigned char* from,
{
unsigned char *ptr;
size_t size;
mpz_t in, out, n, e, b, bi;
mpz_t in, out, n, e;
if (padding != RSA_PKCS1_PADDING)
return -1;
@@ -361,14 +356,10 @@ gmp_rsa_private_decrypt(int flen, const unsigned char* from,
BN2mpz(n, rsa->n);
BN2mpz(e, rsa->e);
res = mp_int_read_unsigned(&in, rk_UNCONST(from), flen);
if (res != MP_OK) {
size = -1;
goto out;
}
mpz_import(in, flen, 1, 1, 1, 0, from);
if(mp_int_compare_zero(&in) < 0 ||
mp_int_compare(&in, &n) >= 0) {
if(mpz_cmp_ui(in, 0) < 0 ||
mpz_cmp(in, n) >= 0) {
size = 0;
goto out;
}
@@ -382,7 +373,7 @@ gmp_rsa_private_decrypt(int flen, const unsigned char* from,
BN2mpz(dmq1, rsa->dmq1);
BN2mpz(iqmp, rsa->iqmp);
res = rsa_private_calculate(in, p, q, dmp1, dmq1, iqmp, out);
rsa_private_calculate(in, p, q, dmp1, dmq1, iqmp, out);
mpz_clear(p);
mpz_clear(q);
@@ -400,11 +391,7 @@ gmp_rsa_private_decrypt(int flen, const unsigned char* from,
BN2mpz(d, rsa->d);
mpz_powm(out, in, d, n);
mp_int_clear(d);
if (res != MP_OK) {
size = 0;
goto out;
}
mpz_clear(d);
}
ptr = to;
@@ -437,6 +424,26 @@ out:
return size;
}
static int
random_num(mpz_t num, size_t len)
{
unsigned char *p;
len = (len + 7) / 8;
p = malloc(len);
if (p == NULL)
return 1;
if (RAND_bytes(p, len) != 1) {
free(p);
return 1;
}
mpz_init(num);
mpz_import(num, len, 1, 1, 1, 0, p);
free(p);
return 0;
}
static int
gmp_rsa_generate_key(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb)
{
@@ -463,68 +470,64 @@ gmp_rsa_generate_key(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb)
BN2mpz(el, e);
/* generate p and q so that p != q and bits(pq) ~ bits */
counter = 0;
#if 0
do {
BN_GENCB_call(cb, 2, counter++);
CHECK(random_num(&p, bits / 2 + 1), 0);
CHECK(mp_int_find_prime(&p), MP_TRUE);
random_num(p, bits / 2 + 1);
mpz_nextprime(p, p);
CHECK(mp_int_sub_value(&p, 1, &t1), MP_OK);
CHECK(mp_int_gcd(&t1, &el, &t2), MP_OK);
} while(mp_int_compare_value(&t2, 1) != 0);
mpz_sub_ui(t1, p, 1);
mpz_gcd(t2, t1, el);
} while(mpz_cmp_ui(t2, 1) != 0);
BN_GENCB_call(cb, 3, 0);
counter = 0;
do {
BN_GENCB_call(cb, 2, counter++);
CHECK(random_num(&q, bits / 2 + 1), 0);
CHECK(mp_int_find_prime(&q), MP_TRUE);
random_num(q, bits / 2 + 1);
mpz_nextprime(q, q);
if (mp_int_compare(&p, &q) == 0) /* don't let p and q be the same */
continue;
CHECK(mp_int_sub_value(&q, 1, &t1), MP_OK);
CHECK(mp_int_gcd(&t1, &el, &t2), MP_OK);
} while(mp_int_compare_value(&t2, 1) != 0);
mpz_sub_ui(t1, q, 1);
mpz_gcd(t2, t1, el);
} while(mpz_cmp_ui(t2, 1) != 0);
/* make p > q */
if (mp_int_compare(&p, &q) < 0)
mp_int_swap(&p, &q);
if (mpz_cmp(p, q) < 0)
mpz_swap(p, q);
BN_GENCB_call(cb, 3, 1);
/* calculate n, n = p * q */
CHECK(mp_int_mul(&p, &q, &n), MP_OK);
mpz_mul(n, p, q);
/* calculate d, d = 1/e mod (p - 1)(q - 1) */
CHECK(mp_int_sub_value(&p, 1, &t1), MP_OK);
CHECK(mp_int_sub_value(&q, 1, &t2), MP_OK);
CHECK(mp_int_mul(&t1, &t2, &t3), MP_OK);
CHECK(mp_int_invmod(&el, &t3, &d), MP_OK);
mpz_sub_ui(t1, p, 1);
mpz_sub_ui(t2, q, 1);
mpz_mul(t3, t1, t2);
mpz_invert(d, el, t3);
/* calculate dmp1 dmp1 = d mod (p-1) */
CHECK(mp_int_mod(&d, &t1, &dmp1), MP_OK);
mpz_mod(dmp1, d, t1);
/* calculate dmq1 dmq1 = d mod (q-1) */
CHECK(mp_int_mod(&d, &t2, &dmq1), MP_OK);
mpz_mod(dmq1, d, t2);
/* calculate iqmp iqmp = 1/q mod p */
CHECK(mp_int_invmod(&q, &p, &iqmp), MP_OK);
mpz_invert(iqmp, q, p);
/* fill in RSA key */
rsa->e = mpz2BN(&el);
rsa->p = mpz2BN(&p);
rsa->q = mpz2BN(&q);
rsa->n = mpz2BN(&n);
rsa->d = mpz2BN(&d);
rsa->dmp1 = mpz2BN(&dmp1);
rsa->dmq1 = mpz2BN(&dmq1);
rsa->iqmp = mpz2BN(&iqmp);
rsa->e = mpz2BN(el);
rsa->p = mpz2BN(p);
rsa->q = mpz2BN(q);
rsa->n = mpz2BN(n);
rsa->d = mpz2BN(d);
rsa->dmp1 = mpz2BN(dmp1);
rsa->dmq1 = mpz2BN(dmq1);
rsa->iqmp = mpz2BN(iqmp);
ret = 1;
#endif
out:
mpz_clear(el);
mpz_clear(p);
mpz_clear(q);