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/*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "ed25519.h"
#include "logging.h"
#include "utils.h"
#include <botan/pubkey.h>
#include <botan/ed25519.h>
#include <cassert>
rnp_result_t
generate_ed25519_native(rnp::RNG * rng,
std::vector<uint8_t> &privkey,
std::vector<uint8_t> &pubkey)
{
Botan::Ed25519_PrivateKey private_key(*(rng->obj()));
const size_t key_len = 32;
auto priv_pub = Botan::unlock(private_key.raw_private_key_bits());
assert(priv_pub.size() == 2 * key_len);
privkey = std::vector<uint8_t>(priv_pub.begin(), priv_pub.begin() + key_len);
pubkey = std::vector<uint8_t>(priv_pub.begin() + key_len, priv_pub.end());
return RNP_SUCCESS;
}
rnp_result_t
ed25519_sign_native(rnp::RNG * rng,
std::vector<uint8_t> & sig_out,
const std::vector<uint8_t> &key,
const uint8_t * hash,
size_t hash_len)
{
Botan::Ed25519_PrivateKey priv_key(Botan::secure_vector<uint8_t>(key.begin(), key.end()));
auto signer = Botan::PK_Signer(priv_key, *(rng->obj()), "Pure");
sig_out = signer.sign_message(hash, hash_len, *(rng->obj()));
return RNP_SUCCESS;
}
rnp_result_t
ed25519_verify_native(const std::vector<uint8_t> &sig,
const std::vector<uint8_t> &key,
const uint8_t * hash,
size_t hash_len)
{
Botan::Ed25519_PublicKey pub_key(key);
auto verifier = Botan::PK_Verifier(pub_key, "Pure");
if (verifier.verify_message(hash, hash_len, sig.data(), sig.size())) {
return RNP_SUCCESS;
}
return RNP_ERROR_VERIFICATION_FAILED;
}
rnp_result_t
ed25519_validate_key_native(rnp::RNG *rng, const pgp_ed25519_key_t *key, bool secret)
{
Botan::Ed25519_PublicKey pub_key(key->pub);
if (!pub_key.check_key(*(rng->obj()), false)) {
return RNP_ERROR_BAD_PARAMETERS;
}
if (secret) {
Botan::Ed25519_PrivateKey priv_key(
Botan::secure_vector<uint8_t>(key->priv.begin(), key->priv.end()));
if (!priv_key.check_key(*(rng->obj()), false)) {
return RNP_ERROR_SIGNING_FAILED;
}
}
return RNP_SUCCESS;
}