Header And Logo
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#include "postgres.h"#include <openssl/bn.h>#include "px.h"#include "mbuf.h"#include "pgp.h"
Go to the source code of this file.
Functions | |
| static BIGNUM * | mpi_to_bn (PGP_MPI *n) |
| static PGP_MPI * | bn_to_mpi (BIGNUM *bn) |
| static int | decide_k_bits (int p_bits) |
| int | pgp_elgamal_encrypt (PGP_PubKey *pk, PGP_MPI *_m, PGP_MPI **c1_p, PGP_MPI **c2_p) |
| int | pgp_elgamal_decrypt (PGP_PubKey *pk, PGP_MPI *_c1, PGP_MPI *_c2, PGP_MPI **msg_p) |
| int | pgp_rsa_encrypt (PGP_PubKey *pk, PGP_MPI *_m, PGP_MPI **c_p) |
| int | pgp_rsa_decrypt (PGP_PubKey *pk, PGP_MPI *_c, PGP_MPI **m_p) |
| static PGP_MPI* bn_to_mpi | ( | BIGNUM * | bn | ) | [static] |
Definition at line 57 of file pgp-mpi-openssl.c.
References PGP_MPI::bytes, PGP_MPI::data, pgp_mpi_alloc(), pgp_mpi_free(), and px_debug().
Referenced by pgp_elgamal_decrypt(), pgp_elgamal_encrypt(), pgp_rsa_decrypt(), and pgp_rsa_encrypt().
{
int res;
PGP_MPI *n;
res = pgp_mpi_alloc(BN_num_bits(bn), &n);
if (res < 0)
return NULL;
if (BN_num_bytes(bn) != n->bytes)
{
px_debug("bn_to_mpi: bignum conversion failed: bn=%d, mpi=%d",
BN_num_bytes(bn), n->bytes);
pgp_mpi_free(n);
return NULL;
}
BN_bn2bin(bn, n->data);
return n;
}
| static int decide_k_bits | ( | int | p_bits | ) | [static] |
Definition at line 93 of file pgp-mpi-openssl.c.
Referenced by pgp_elgamal_encrypt().
{
if (p_bits <= 5120)
return p_bits / 10 + 160;
else
return (p_bits / 8 + 200) * 3 / 2;
}
| static BIGNUM* mpi_to_bn | ( | PGP_MPI * | n | ) | [static] |
Definition at line 40 of file pgp-mpi-openssl.c.
References PGP_MPI::bits, PGP_MPI::bytes, PGP_MPI::data, NULL, and px_debug().
Referenced by pgp_elgamal_decrypt(), pgp_elgamal_encrypt(), pgp_rsa_decrypt(), and pgp_rsa_encrypt().
| int pgp_elgamal_decrypt | ( | PGP_PubKey * | pk, | |
| PGP_MPI * | _c1, | |||
| PGP_MPI * | _c2, | |||
| PGP_MPI ** | msg_p | |||
| ) |
Definition at line 165 of file pgp-mpi-openssl.c.
References bn_to_mpi(), PGP_PubKey::elg, mp_clear_free(), mp_int_exptmod(), mp_int_invmod(), mp_modmul(), mp_new(), mpi_to_bn(), PGP_PubKey::pub, and PGP_PubKey::sec.
{
int res = PXE_PGP_MATH_FAILED;
BIGNUM *c1 = mpi_to_bn(_c1);
BIGNUM *c2 = mpi_to_bn(_c2);
BIGNUM *p = mpi_to_bn(pk->pub.elg.p);
BIGNUM *x = mpi_to_bn(pk->sec.elg.x);
BIGNUM *c1x = BN_new();
BIGNUM *div = BN_new();
BIGNUM *m = BN_new();
BN_CTX *tmp = BN_CTX_new();
if (!c1 || !c2 || !p || !x || !c1x || !div || !m || !tmp)
goto err;
/*
* m = c2 / (c1^x)
*/
if (!BN_mod_exp(c1x, c1, x, p, tmp))
goto err;
if (!BN_mod_inverse(div, c1x, p, tmp))
goto err;
if (!BN_mod_mul(m, c2, div, p, tmp))
goto err;
/* result */
*msg_p = bn_to_mpi(m);
if (*msg_p)
res = 0;
err:
if (tmp)
BN_CTX_free(tmp);
if (m)
BN_clear_free(m);
if (div)
BN_clear_free(div);
if (c1x)
BN_clear_free(c1x);
if (x)
BN_clear_free(x);
if (p)
BN_clear_free(p);
if (c2)
BN_clear_free(c2);
if (c1)
BN_clear_free(c1);
return res;
}
| int pgp_elgamal_encrypt | ( | PGP_PubKey * | pk, | |
| PGP_MPI * | _m, | |||
| PGP_MPI ** | c1_p, | |||
| PGP_MPI ** | c2_p | |||
| ) |
Definition at line 102 of file pgp-mpi-openssl.c.
References bn_to_mpi(), decide_k_bits(), PGP_PubKey::elg, mp_clear_free(), mp_int_count_bits(), mp_int_exptmod(), mp_modmul(), mp_new(), mp_px_rand(), mpi_to_bn(), and PGP_PubKey::pub.
{
int res = PXE_PGP_MATH_FAILED;
int k_bits;
BIGNUM *m = mpi_to_bn(_m);
BIGNUM *p = mpi_to_bn(pk->pub.elg.p);
BIGNUM *g = mpi_to_bn(pk->pub.elg.g);
BIGNUM *y = mpi_to_bn(pk->pub.elg.y);
BIGNUM *k = BN_new();
BIGNUM *yk = BN_new();
BIGNUM *c1 = BN_new();
BIGNUM *c2 = BN_new();
BN_CTX *tmp = BN_CTX_new();
if (!m || !p || !g || !y || !k || !yk || !c1 || !c2 || !tmp)
goto err;
/*
* generate k
*/
k_bits = decide_k_bits(BN_num_bits(p));
if (!BN_rand(k, k_bits, 0, 0))
goto err;
/*
* c1 = g^k c2 = m * y^k
*/
if (!BN_mod_exp(c1, g, k, p, tmp))
goto err;
if (!BN_mod_exp(yk, y, k, p, tmp))
goto err;
if (!BN_mod_mul(c2, m, yk, p, tmp))
goto err;
/* result */
*c1_p = bn_to_mpi(c1);
*c2_p = bn_to_mpi(c2);
if (*c1_p && *c2_p)
res = 0;
err:
if (tmp)
BN_CTX_free(tmp);
if (c2)
BN_clear_free(c2);
if (c1)
BN_clear_free(c1);
if (yk)
BN_clear_free(yk);
if (k)
BN_clear_free(k);
if (y)
BN_clear_free(y);
if (g)
BN_clear_free(g);
if (p)
BN_clear_free(p);
if (m)
BN_clear_free(m);
return res;
}
| int pgp_rsa_decrypt | ( | PGP_PubKey * | pk, | |
| PGP_MPI * | _c, | |||
| PGP_MPI ** | m_p | |||
| ) |
Definition at line 252 of file pgp-mpi-openssl.c.
References bn_to_mpi(), mp_clear_free(), mp_int_exptmod(), mp_new(), mpi_to_bn(), PGP_PubKey::pub, PGP_PubKey::rsa, and PGP_PubKey::sec.
{
int res = PXE_PGP_MATH_FAILED;
BIGNUM *c = mpi_to_bn(_c);
BIGNUM *d = mpi_to_bn(pk->sec.rsa.d);
BIGNUM *n = mpi_to_bn(pk->pub.rsa.n);
BIGNUM *m = BN_new();
BN_CTX *tmp = BN_CTX_new();
if (!m || !d || !n || !c || !tmp)
goto err;
/*
* m = c ^ d
*/
if (!BN_mod_exp(m, c, d, n, tmp))
goto err;
*m_p = bn_to_mpi(m);
if (*m_p)
res = 0;
err:
if (tmp)
BN_CTX_free(tmp);
if (m)
BN_clear_free(m);
if (n)
BN_clear_free(n);
if (d)
BN_clear_free(d);
if (c)
BN_clear_free(c);
return res;
}
| int pgp_rsa_encrypt | ( | PGP_PubKey * | pk, | |
| PGP_MPI * | _m, | |||
| PGP_MPI ** | c_p | |||
| ) |
Definition at line 216 of file pgp-mpi-openssl.c.
References bn_to_mpi(), mp_clear_free(), mp_int_exptmod(), mp_new(), mpi_to_bn(), PGP_PubKey::pub, and PGP_PubKey::rsa.
{
int res = PXE_PGP_MATH_FAILED;
BIGNUM *m = mpi_to_bn(_m);
BIGNUM *e = mpi_to_bn(pk->pub.rsa.e);
BIGNUM *n = mpi_to_bn(pk->pub.rsa.n);
BIGNUM *c = BN_new();
BN_CTX *tmp = BN_CTX_new();
if (!m || !e || !n || !c || !tmp)
goto err;
/*
* c = m ^ e
*/
if (!BN_mod_exp(c, m, e, n, tmp))
goto err;
*c_p = bn_to_mpi(c);
if (*c_p)
res = 0;
err:
if (tmp)
BN_CTX_free(tmp);
if (c)
BN_clear_free(c);
if (n)
BN_clear_free(n);
if (e)
BN_clear_free(e);
if (m)
BN_clear_free(m);
return res;
}
1.7.1