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Store DH generator in a chunk, hide non-public data in a private struct

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This commit is contained in:
Martin Willi
2010-04-08 15:08:35 +02:00
parent 6c1dc87551
commit b34b93dbf7
5 changed files with 305 additions and 313 deletions
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src/libstrongswan/plugins/gcrypt/gcrypt_dh.c
+12 -3
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@@ -203,15 +203,24 @@ gcrypt_dh_t *gcrypt_dh_create(diffie_hellman_group_t group)
this->public.dh.destroy = (void (*)(diffie_hellman_t *)) destroy;
this->group = group;
this->p_len = params->prime_len;
this->p_len = params->prime.len;
err = gcry_mpi_scan(&this->p, GCRYMPI_FMT_USG,
params->prime, params->prime_len, NULL);
params->prime.ptr, params->prime.len, NULL);
if (err)
{
DBG1(DBG_LIB, "importing mpi modulus failed: %s", gpg_strerror(err));
free(this);
return NULL;
}
err = gcry_mpi_scan(&this->g, GCRYMPI_FMT_USG,
params->generator.ptr, params->generator.len, NULL);
if (err)
{
DBG1(DBG_LIB, "importing mpi generator failed: %s", gpg_strerror(err));
gcry_mpi_release(this->p);
free(this);
return NULL;
}
rng = lib->crypto->create_rng(lib->crypto, RNG_STRONG);
if (rng)
@@ -225,6 +234,7 @@ gcrypt_dh_t *gcrypt_dh_create(diffie_hellman_group_t group)
{
DBG1(DBG_LIB, "importing mpi xa failed: %s", gpg_strerror(err));
gcry_mpi_release(this->p);
gcry_mpi_release(this->g);
free(this);
return NULL;
}
@@ -240,7 +250,6 @@ gcrypt_dh_t *gcrypt_dh_create(diffie_hellman_group_t group)
gcry_mpi_clear_bit(this->xa, params->exp_len * 8 - 1);
}
this->g = gcry_mpi_set_ui(NULL, params->generator);
this->ya = gcry_mpi_new(this->p_len * 8);
this->yb = NULL;
this->zz = NULL;