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Improve LibreSSL compatibility

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David Uhden Collado 2025-10-13 22:56:56 +02:00
parent 80840b761e
commit 29660b6745
No known key found for this signature in database
GPG key ID: 1A47E8A7D51FB3DA
4 changed files with 98 additions and 29 deletions
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49
libi2pd/Signature.cpp
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@ -7,6 +7,7 @@
*/
#include <memory>
#include <cstring>
#include "Crypto.h"
#include <openssl/evp.h>
#if I2PD_OPENSSL_GE_3 // since 3.0.0
@ -286,19 +287,41 @@ namespace crypto
void CreateECDSARandomKeys (int curve, size_t keyLen, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{
EVP_PKEY * pkey = EVP_EC_gen (OBJ_nid2ln(curve));
// private
BIGNUM * priv = BN_new ();
EVP_PKEY_get_bn_param (pkey, OSSL_PKEY_PARAM_PRIV_KEY, &priv);
bn2buf (priv, signingPrivateKey, keyLen/2);
BN_free (priv);
// public
BIGNUM * x = BN_new (), * y = BN_new ();
EVP_PKEY_get_bn_param (pkey, OSSL_PKEY_PARAM_EC_PUB_X, &x);
EVP_PKEY_get_bn_param (pkey, OSSL_PKEY_PARAM_EC_PUB_Y, &y);
bn2buf (x, signingPublicKey, keyLen/2);
bn2buf (y, signingPublicKey + keyLen/2, keyLen/2);
BN_free (x); BN_free (y);
auto pkey = GenerateECKey (curve);
if (!pkey)
return;
EC_KEY * ec = EVP_PKEY_get1_EC_KEY (pkey);
if (!ec)
{
LogPrint (eLogError, "ECDSA: Failed to extract EC key for curve ", curve);
EVP_PKEY_free (pkey);
return;
}
const BIGNUM * priv = EC_KEY_get0_private_key (ec);
if (priv)
bn2buf (priv, signingPrivateKey, keyLen/2);
else
memset (signingPrivateKey, 0, keyLen/2);
const EC_GROUP * group = EC_KEY_get0_group (ec);
const EC_POINT * pub = EC_KEY_get0_public_key (ec);
if (group && pub)
{
BIGNUM * x = BN_new (), * y = BN_new ();
BN_CTX * ctx = BN_CTX_new ();
if (x && y && ctx && EC_POINT_get_affine_coordinates_GFp (group, pub, x, y, ctx))
{
bn2buf (x, signingPublicKey, keyLen/2);
bn2buf (y, signingPublicKey + keyLen/2, keyLen/2);
}
else
LogPrint (eLogError, "ECDSA: Failed to extract public coordinates for curve ", curve);
if (ctx) BN_CTX_free (ctx);
if (x) BN_free (x);
if (y) BN_free (y);
}
else
LogPrint (eLogError, "ECDSA: Missing group or public key for curve ", curve);
EC_KEY_free (ec);
EVP_PKEY_free (pkey);
}