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/*
This file is part of TALER
Copyright (C) 2019 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file exchange-tools/taler-exchange-tvg.c
* @brief Generate test vectors for cryptographic operations.
* @author Florian Dold
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
#include <gnunet/gnunet_util_lib.h>
/**
* Print data base32-crockford with a preceding label.
*
* @param label label to print
* @param data data to print
* @param size size of data
*/
static void
display_data (char *label, void *data, size_t size)
{
char *enc = GNUNET_STRINGS_data_to_string_alloc (data, size);
printf ("%s %s\n", label, enc);
GNUNET_free (enc);
}
/**
* Main function that will be run.
*
* @param cls closure
* @param args remaining command-line arguments
* @param cfgfile name of the configuration file used (for saving, can be NULL!)
* @param cfg configuration
*/
static void
run (void *cls,
char *const *args,
const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
{
struct GNUNET_HashCode hc;
char *str = "Hello, GNU Taler";
GNUNET_CRYPTO_hash (str, strlen (str), &hc);
printf ("hash code:\n");
display_data (" input", str, strlen (str));
display_data (" output", &hc, sizeof (struct GNUNET_HashCode));
}
{
struct GNUNET_CRYPTO_EcdhePrivateKey *priv1;
struct GNUNET_CRYPTO_EcdhePublicKey pub1;
struct GNUNET_CRYPTO_EcdhePrivateKey *priv2;
struct GNUNET_HashCode skm;
priv1 = GNUNET_CRYPTO_ecdhe_key_create ();
priv2 = GNUNET_CRYPTO_ecdhe_key_create ();
GNUNET_CRYPTO_ecdhe_key_get_public (priv1, &pub1);
GNUNET_assert (GNUNET_OK == GNUNET_CRYPTO_ecc_ecdh (priv2, &pub1, &skm));
printf ("ecdhe key:\n");
display_data (" priv1", priv1, sizeof (struct
GNUNET_CRYPTO_EcdhePrivateKey));
display_data (" pub1", &pub1, sizeof (struct
GNUNET_CRYPTO_EcdhePublicKey));
display_data (" priv2", priv2, sizeof (struct
GNUNET_CRYPTO_EcdhePrivateKey));
display_data (" skm", &skm, sizeof (struct GNUNET_HashCode));
GNUNET_free (priv1);
GNUNET_free (priv2);
}
{
struct GNUNET_CRYPTO_EddsaPrivateKey *priv;
struct GNUNET_CRYPTO_EddsaPublicKey pub;
priv = GNUNET_CRYPTO_eddsa_key_create ();
GNUNET_CRYPTO_eddsa_key_get_public (priv, &pub);
printf ("eddsa key:\n");
display_data (" priv", priv, sizeof (struct
GNUNET_CRYPTO_EddsaPrivateKey));
display_data (" pub", &pub, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey));
GNUNET_free (priv);
}
{
struct GNUNET_CRYPTO_EddsaPrivateKey *priv;
struct GNUNET_CRYPTO_EddsaPublicKey pub;
struct GNUNET_CRYPTO_EddsaSignature sig;
struct TALER_ProposalDataPS data = { 0 };
priv = GNUNET_CRYPTO_eddsa_key_create ();
GNUNET_CRYPTO_eddsa_key_get_public (priv, &pub);
data.purpose.size = htonl (sizeof (struct TALER_ProposalDataPS));
GNUNET_assert (GNUNET_OK == GNUNET_CRYPTO_eddsa_sign (priv, &data.purpose,
&sig));
printf ("eddsa sig:\n");
display_data (" priv", priv, sizeof (struct
GNUNET_CRYPTO_EddsaPrivateKey));
display_data (" pub", &pub, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey));
display_data (" data", &data, sizeof (struct TALER_ProposalDataPS));
display_data (" sig", &sig, sizeof (struct GNUNET_CRYPTO_EddsaSignature));
GNUNET_free (priv);
}
{
size_t out_len = 64;
char out[out_len];
char *ikm = "I'm the secret input key material";
char *salt = "I'm very salty";
char *ctx = "I'm a context chunk, also known as 'info' in the RFC";
GNUNET_assert (GNUNET_OK == GNUNET_CRYPTO_kdf (&out,
out_len,
salt,
strlen (salt),
ikm,
strlen (ikm),
ctx,
strlen (ctx),
NULL));
printf ("kdf:\n");
display_data (" salt", salt, strlen (salt));
display_data (" ikm", ikm, strlen (ikm));
display_data (" ctx", ctx, strlen (ctx));
display_data (" out", out, out_len);
}
{
struct GNUNET_CRYPTO_EcdhePrivateKey *priv_ecdhe;
struct GNUNET_CRYPTO_EcdhePublicKey pub_ecdhe;
struct GNUNET_CRYPTO_EddsaPrivateKey *priv_eddsa;
struct GNUNET_CRYPTO_EddsaPublicKey pub_eddsa;
struct GNUNET_HashCode key_material;
priv_ecdhe = GNUNET_CRYPTO_ecdhe_key_create ();
GNUNET_CRYPTO_ecdhe_key_get_public (priv_ecdhe, &pub_ecdhe);
priv_eddsa = GNUNET_CRYPTO_eddsa_key_create ();
GNUNET_CRYPTO_eddsa_key_get_public (priv_eddsa, &pub_eddsa);
GNUNET_CRYPTO_ecdh_eddsa (priv_ecdhe, &pub_eddsa, &key_material);
printf ("eddsa_ecdh:\n");
display_data (" priv_ecdhe", priv_ecdhe, sizeof (struct
GNUNET_CRYPTO_EcdhePrivateKey));
display_data (" pub_ecdhe", &pub_ecdhe, sizeof (struct
GNUNET_CRYPTO_EcdhePublicKey));
display_data (" priv_ecdhe", priv_ecdhe, sizeof (struct
GNUNET_CRYPTO_EddsaPrivateKey));
display_data (" pub_ecdhe", &pub_ecdhe, sizeof (struct
GNUNET_CRYPTO_EcdhePublicKey));
display_data (" key_material", &key_material, sizeof (struct
GNUNET_HashCode));
}
{
struct GNUNET_CRYPTO_RsaPrivateKey *skey;
struct GNUNET_CRYPTO_RsaPublicKey *pkey;
struct GNUNET_HashCode message_hash;
struct GNUNET_CRYPTO_RsaBlindingKeySecret bks;
struct GNUNET_CRYPTO_RsaSignature *blinded_sig;
struct GNUNET_CRYPTO_RsaSignature *sig;
char *blinded_data;
size_t blinded_len;
char *public_enc_data;
size_t public_enc_len;
char *blinded_sig_enc_data;
size_t blinded_sig_enc_length;
char *sig_enc_data;
size_t sig_enc_length;
skey = GNUNET_CRYPTO_rsa_private_key_create (2048);
pkey = GNUNET_CRYPTO_rsa_private_key_get_public (skey);
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, &message_hash,
sizeof (struct GNUNET_HashCode));
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, &bks, sizeof (struct
GNUNET_CRYPTO_RsaBlindingKeySecret));
GNUNET_assert (GNUNET_YES == GNUNET_CRYPTO_rsa_blind (&message_hash, &bks,
pkey, &blinded_data,
&blinded_len));
blinded_sig = GNUNET_CRYPTO_rsa_sign_blinded (skey, blinded_data,
blinded_len);
sig = GNUNET_CRYPTO_rsa_unblind (blinded_sig, &bks, pkey);
GNUNET_assert (GNUNET_YES == GNUNET_CRYPTO_rsa_verify (&message_hash, sig,
pkey));
public_enc_len = GNUNET_CRYPTO_rsa_public_key_encode (pkey,
&public_enc_data);
blinded_sig_enc_length = GNUNET_CRYPTO_rsa_signature_encode (blinded_sig,
&
blinded_sig_enc_data);
sig_enc_length = GNUNET_CRYPTO_rsa_signature_encode (sig, &sig_enc_data);
printf ("blind signing:\n");
display_data (" message_hash", &message_hash, sizeof (struct
GNUNET_HashCode));
display_data (" rsa_public_key", public_enc_data, public_enc_len);
display_data (" blinding_key_secret", &bks, sizeof (struct
GNUNET_CRYPTO_RsaBlindingKeySecret));
display_data (" blinded_message", blinded_data, blinded_len);
display_data (" blinded_sig", blinded_sig_enc_data,
blinded_sig_enc_length);
display_data (" sig", sig_enc_data, sig_enc_length);
GNUNET_CRYPTO_rsa_private_key_free (skey);
GNUNET_CRYPTO_rsa_public_key_free (pkey);
GNUNET_CRYPTO_rsa_signature_free (sig);
GNUNET_CRYPTO_rsa_signature_free (blinded_sig);
}
}
/**
* The main function of the test vector generation tool.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
*/
int
main (int argc,
char *const *argv)
{
const struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_OPTION_END
};
/* force linker to link against libtalerutil; if we do
not do this, the linker may "optimize" libtalerutil
away and skip #TALER_OS_init(), which we do need */
(void) TALER_project_data_default ();
GNUNET_assert (GNUNET_OK ==
GNUNET_log_setup ("taler-exchange-dbinit",
"INFO",
NULL));
if (GNUNET_OK !=
GNUNET_PROGRAM_run (argc, argv,
"taler-exchange-tvg",
"Generate test vectors",
options,
&run, NULL))
return 1;
return 0;
}
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