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Reworked the ECC changes to better fit into the Libgcrypt API.

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See ChangeLog for details.  Key generation, signing and verification works.
Encryption does not yet work.  Requires latest Libgcrypt changes.
This commit is contained in:
Werner Koch 2011-01-31 09:27:06 +01:00
parent a58a6b5b78
commit 0fb0bb8d9a
12 changed files with 622 additions and 359 deletions
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26
g10/ecdh.c
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@ -48,16 +48,17 @@ static const struct
/* Returns allocated (binary) KEK parameters; the size is returned in
sizeout. The caller must free the returned value. Returns NULL
and sets ERRNO on error. */
byte *
pk_ecdh_default_params (unsigned int qbits, size_t *sizeout)
/* Return KEK parameters as an opaque MPI The caller must free the
returned value. Returns NULL and sets ERRNO on error. */
gcry_mpi_t
pk_ecdh_default_params (unsigned int qbits)
{
byte kek_params[4];
byte *kek_params;
int i;
byte *buffer;
kek_params = xtrymalloc (4);
if (!kek_params)
return NULL;
kek_params[0] = 3; /* Number of bytes to follow. */
kek_params[1] = 1; /* Version for KDF+AESWRAP. */
@ -78,12 +79,7 @@ pk_ecdh_default_params (unsigned int qbits, size_t *sizeout)
if (DBG_CIPHER)
log_printhex ("ECDH KEK params are", kek_params, sizeof(kek_params) );
buffer = xtrymalloc (sizeof(kek_params));
if (!buffer)
return NULL;
memcpy (buffer, kek_params, sizeof (kek_params));
*sizeout = sizeof (kek_params);
return buffer;
return gcry_mpi_set_opaque (NULL, kek_params, 4 * 8);
}
@ -411,8 +407,8 @@ gen_k (unsigned nbits)
unsigned char *buffer;
if (gcry_mpi_aprint (GCRYMPI_FMT_HEX, &buffer, NULL, k))
BUG ();
log_debug("ephemeral scalar MPI #0: %s\n", buffer);
gcry_free( buffer );
log_debug ("ephemeral scalar MPI #0: %s\n", buffer);
gcry_free (buffer);
}
return k;