--- /dev/null
+/*
+ * Copyright (c) 2010 SURFnet bv
+ * 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 AUTHOR ``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 AUTHOR 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.
+ */
+
+/*****************************************************************************
+ OSSLEDDSA.cpp
+
+ OpenSSL EDDSA asymmetric algorithm implementation
+ *****************************************************************************/
+
+#include "config.h"
+#ifdef WITH_EDDSA
+#include "log.h"
+#include "OSSLEDDSA.h"
+#include "CryptoFactory.h"
+#include "ECParameters.h"
+#include "OSSLEDKeyPair.h"
+#include "OSSLComp.h"
+#include "OSSLUtil.h"
+#include <algorithm>
+#include <openssl/evp.h>
+#include <openssl/pem.h>
+#include <openssl/err.h>
+#include <string.h>
+
+// Signing functions
+bool OSSLEDDSA::sign(PrivateKey* privateKey, const ByteString& dataToSign,
+ ByteString& signature, const AsymMech::Type mechanism,
+ const void* /* param = NULL */, const size_t /* paramLen = 0 */)
+{
+ if (mechanism != AsymMech::EDDSA)
+ {
+ ERROR_MSG("Invalid mechanism supplied (%i)", mechanism);
+ return false;
+ }
+
+ // Check if the private key is the right type
+ if (!privateKey->isOfType(OSSLEDPrivateKey::type))
+ {
+ ERROR_MSG("Invalid key type supplied");
+
+ return false;
+ }
+
+ OSSLEDPrivateKey* pk = (OSSLEDPrivateKey*) privateKey;
+ EVP_PKEY* pkey = pk->getOSSLKey();
+
+ if (pkey == NULL)
+ {
+ ERROR_MSG("Could not get the OpenSSL private key");
+
+ return false;
+ }
+
+ // Perform the signature operation
+ size_t len = pk->getOrderLength();
+ if (len == 0)
+ {
+ ERROR_MSG("Could not get the order length");
+ return false;
+ }
+ len *= 2;
+ signature.resize(len);
+ memset(&signature[0], 0, len);
+ EVP_MD_CTX* ctx = EVP_MD_CTX_new();
+ if (!EVP_DigestSignInit(ctx, NULL, NULL, NULL, pkey))
+ {
+ ERROR_MSG("EDDSA sign init failed (0x%08X)", ERR_get_error());
+ EVP_MD_CTX_free(ctx);
+ return false;
+ }
+ if (!EVP_DigestSign(ctx, &signature[0], &len, dataToSign.const_byte_str(), dataToSign.size()))
+ {
+ ERROR_MSG("EDDSA sign failed (0x%08X)", ERR_get_error());
+ EVP_MD_CTX_free(ctx);
+ return false;
+ }
+ EVP_MD_CTX_free(ctx);
+ return true;
+}
+
+bool OSSLEDDSA::signInit(PrivateKey* /*privateKey*/, const AsymMech::Type /*mechanism*/,
+ const void* /* param = NULL */, const size_t /* paramLen = 0 */)
+{
+ ERROR_MSG("EDDSA does not support multi part signing");
+
+ return false;
+}
+
+bool OSSLEDDSA::signUpdate(const ByteString& /*dataToSign*/)
+{
+ ERROR_MSG("EDDSA does not support multi part signing");
+
+ return false;
+}
+
+bool OSSLEDDSA::signFinal(ByteString& /*signature*/)
+{
+ ERROR_MSG("EDDSA does not support multi part signing");
+
+ return false;
+}
+
+// Verification functions
+bool OSSLEDDSA::verify(PublicKey* publicKey, const ByteString& originalData,
+ const ByteString& signature, const AsymMech::Type mechanism,
+ const void* /* param = NULL */, const size_t /* paramLen = 0 */)
+{
+ if (mechanism != AsymMech::EDDSA)
+ {
+ ERROR_MSG("Invalid mechanism supplied (%i)", mechanism);
+ return false;
+ }
+
+ // Check if the private key is the right type
+ if (!publicKey->isOfType(OSSLEDPublicKey::type))
+ {
+ ERROR_MSG("Invalid key type supplied");
+
+ return false;
+ }
+
+ OSSLEDPublicKey* pk = (OSSLEDPublicKey*) publicKey;
+ EVP_PKEY* pkey = pk->getOSSLKey();
+
+ if (pkey == NULL)
+ {
+ ERROR_MSG("Could not get the OpenSSL public key");
+
+ return false;
+ }
+
+ // Perform the verify operation
+ size_t len = pk->getOrderLength();
+ if (len == 0)
+ {
+ ERROR_MSG("Could not get the order length");
+ return false;
+ }
+ len *= 2;
+ if (signature.size() != len)
+ {
+ ERROR_MSG("Invalid buffer length");
+ return false;
+ }
+ EVP_MD_CTX* ctx = EVP_MD_CTX_new();
+ if (!EVP_DigestVerifyInit(ctx, NULL, NULL, NULL, pkey))
+ {
+ ERROR_MSG("EDDSA verify init failed (0x%08X)", ERR_get_error());
+ EVP_MD_CTX_free(ctx);
+ return false;
+ }
+ int ret = EVP_DigestVerify(ctx, signature.const_byte_str(), len, originalData.const_byte_str(), originalData.size());
+ if (ret != 1)
+ {
+ if (ret < 0)
+ ERROR_MSG("EDDSA verify failed (0x%08X)", ERR_get_error());
+ EVP_MD_CTX_free(ctx);
+ return false;
+ }
+ EVP_MD_CTX_free(ctx);
+ return true;
+}
+
+bool OSSLEDDSA::verifyInit(PublicKey* /*publicKey*/, const AsymMech::Type /*mechanism*/,
+ const void* /* param = NULL */, const size_t /* paramLen = 0 */)
+{
+ ERROR_MSG("EDDSA does not support multi part verifying");
+
+ return false;
+}
+
+bool OSSLEDDSA::verifyUpdate(const ByteString& /*originalData*/)
+{
+ ERROR_MSG("EDDSA does not support multi part verifying");
+
+ return false;
+}
+
+bool OSSLEDDSA::verifyFinal(const ByteString& /*signature*/)
+{
+ ERROR_MSG("EDDSA does not support multi part verifying");
+
+ return false;
+}
+
+// Encryption functions
+bool OSSLEDDSA::encrypt(PublicKey* /*publicKey*/, const ByteString& /*data*/,
+ ByteString& /*encryptedData*/, const AsymMech::Type /*padding*/)
+{
+ ERROR_MSG("EDDSA does not support encryption");
+
+ return false;
+}
+
+// Decryption functions
+bool OSSLEDDSA::decrypt(PrivateKey* /*privateKey*/, const ByteString& /*encryptedData*/,
+ ByteString& /*data*/, const AsymMech::Type /*padding*/)
+{
+ ERROR_MSG("EDDSA does not support decryption");
+
+ return false;
+}
+
+// Key factory
+bool OSSLEDDSA::generateKeyPair(AsymmetricKeyPair** ppKeyPair, AsymmetricParameters* parameters, RNG* /*rng = NULL */)
+{
+ // Check parameters
+ if ((ppKeyPair == NULL) ||
+ (parameters == NULL))
+ {
+ return false;
+ }
+
+ if (!parameters->areOfType(ECParameters::type))
+ {
+ ERROR_MSG("Invalid parameters supplied for EDDSA key generation");
+
+ return false;
+ }
+
+ ECParameters* params = (ECParameters*) parameters;
+ int nid = OSSL::byteString2oid(params->getEC());
+
+ // Generate the key-pair
+ EVP_PKEY* pkey = NULL;
+ EVP_PKEY_CTX* ctx = EVP_PKEY_CTX_new_id(nid, NULL);
+ if (ctx == NULL)
+ {
+ ERROR_MSG("Failed to instantiate OpenSSL EDDSA context");
+
+ return false;
+ }
+ int ret = EVP_PKEY_keygen_init(ctx);
+ if (ret != 1)
+ {
+ ERROR_MSG("EDDSA key generation init failed (0x%08X)", ERR_get_error());
+ EVP_PKEY_CTX_free(ctx);
+ return false;
+ }
+ ret = EVP_PKEY_keygen(ctx, &pkey);
+ if (ret != 1)
+ {
+ ERROR_MSG("EDDSA key generation failed (0x%08X)", ERR_get_error());
+ EVP_PKEY_CTX_free(ctx);
+ return false;
+ }
+ EVP_PKEY_CTX_free(ctx);
+
+ // Create an asymmetric key-pair object to return
+ OSSLEDKeyPair* kp = new OSSLEDKeyPair();
+
+ ((OSSLEDPublicKey*) kp->getPublicKey())->setFromOSSL(pkey);
+ ((OSSLEDPrivateKey*) kp->getPrivateKey())->setFromOSSL(pkey);
+
+ *ppKeyPair = kp;
+
+ // Release the key
+ EVP_PKEY_free(pkey);
+
+ return true;
+}
+
+bool OSSLEDDSA::deriveKey(SymmetricKey **ppSymmetricKey, PublicKey* publicKey, PrivateKey* privateKey)
+{
+ // Check parameters
+ if ((ppSymmetricKey == NULL) ||
+ (publicKey == NULL) ||
+ (privateKey == NULL))
+ {
+ return false;
+ }
+
+ // Get keys
+ EVP_PKEY *pub = ((OSSLEDPublicKey *)publicKey)->getOSSLKey();
+ EVP_PKEY *priv = ((OSSLEDPrivateKey *)privateKey)->getOSSLKey();
+ if (pub == NULL || priv == NULL)
+ {
+ ERROR_MSG("Failed to get OpenSSL ECDH keys");
+
+ return false;
+ }
+
+ // Get and set context
+ EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new(priv, NULL);
+ if (ctx == NULL)
+ {
+ ERROR_MSG("Failed to get OpenSSL ECDH context");
+
+ return false;
+ }
+ if (EVP_PKEY_derive_init(ctx) <= 0)
+ {
+ ERROR_MSG("Failed to init OpenSSL key derive");
+
+ EVP_PKEY_CTX_free(ctx);
+ return false;
+ }
+ if (EVP_PKEY_derive_set_peer(ctx, pub) <= 0)
+ {
+ ERROR_MSG("Failed to set OpenSSL ECDH public key");
+
+ EVP_PKEY_CTX_free(ctx);
+ return false;
+ }
+
+ // Derive the secret
+ size_t len;
+ if (EVP_PKEY_derive(ctx, NULL, &len) <= 0)
+ {
+ ERROR_MSG("Failed to get OpenSSL ECDH key length");
+
+ EVP_PKEY_CTX_free(ctx);
+ return false;
+ }
+ ByteString secret;
+ secret.resize(len);
+ if (EVP_PKEY_derive(ctx, &secret[0], &len) <= 0)
+ {
+ ERROR_MSG("Failed to derive OpenSSL ECDH secret");
+
+ EVP_PKEY_CTX_free(ctx);
+ return false;
+ }
+ EVP_PKEY_CTX_free(ctx);
+
+ // Create derived key
+ *ppSymmetricKey = new SymmetricKey(secret.size() * 8);
+ if (*ppSymmetricKey == NULL)
+ return false;
+ if (!(*ppSymmetricKey)->setKeyBits(secret))
+ {
+ delete *ppSymmetricKey;
+ *ppSymmetricKey = NULL;
+ return false;
+ }
+
+ return true;
+}
+
+unsigned long OSSLEDDSA::getMinKeySize()
+{
+ // Ed25519 is supported
+ return 32*8;
+}
+
+unsigned long OSSLEDDSA::getMaxKeySize()
+{
+ // Ed448 will be supported
+ return 57*8;
+}
+
+bool OSSLEDDSA::reconstructKeyPair(AsymmetricKeyPair** ppKeyPair, ByteString& serialisedData)
+{
+ // Check input
+ if ((ppKeyPair == NULL) ||
+ (serialisedData.size() == 0))
+ {
+ return false;
+ }
+
+ ByteString dPub = ByteString::chainDeserialise(serialisedData);
+ ByteString dPriv = ByteString::chainDeserialise(serialisedData);
+
+ OSSLEDKeyPair* kp = new OSSLEDKeyPair();
+
+ bool rv = true;
+
+ if (!((EDPublicKey*) kp->getPublicKey())->deserialise(dPub))
+ {
+ rv = false;
+ }
+
+ if (!((EDPrivateKey*) kp->getPrivateKey())->deserialise(dPriv))
+ {
+ rv = false;
+ }
+
+ if (!rv)
+ {
+ delete kp;
+
+ return false;
+ }
+
+ *ppKeyPair = kp;
+
+ return true;
+}
+
+bool OSSLEDDSA::reconstructPublicKey(PublicKey** ppPublicKey, ByteString& serialisedData)
+{
+ // Check input
+ if ((ppPublicKey == NULL) ||
+ (serialisedData.size() == 0))
+ {
+ return false;
+ }
+
+ OSSLEDPublicKey* pub = new OSSLEDPublicKey();
+
+ if (!pub->deserialise(serialisedData))
+ {
+ delete pub;
+
+ return false;
+ }
+
+ *ppPublicKey = pub;
+
+ return true;
+}
+
+bool OSSLEDDSA::reconstructPrivateKey(PrivateKey** ppPrivateKey, ByteString& serialisedData)
+{
+ // Check input
+ if ((ppPrivateKey == NULL) ||
+ (serialisedData.size() == 0))
+ {
+ return false;
+ }
+
+ OSSLEDPrivateKey* priv = new OSSLEDPrivateKey();
+
+ if (!priv->deserialise(serialisedData))
+ {
+ delete priv;
+
+ return false;
+ }
+
+ *ppPrivateKey = priv;
+
+ return true;
+}
+
+PublicKey* OSSLEDDSA::newPublicKey()
+{
+ return (PublicKey*) new OSSLEDPublicKey();
+}
+
+PrivateKey* OSSLEDDSA::newPrivateKey()
+{
+ return (PrivateKey*) new OSSLEDPrivateKey();
+}
+
+AsymmetricParameters* OSSLEDDSA::newParameters()
+{
+ return (AsymmetricParameters*) new ECParameters();
+}
+
+bool OSSLEDDSA::reconstructParameters(AsymmetricParameters** ppParams, ByteString& serialisedData)
+{
+ // Check input parameters
+ if ((ppParams == NULL) || (serialisedData.size() == 0))
+ {
+ return false;
+ }
+
+ ECParameters* params = new ECParameters();
+
+ if (!params->deserialise(serialisedData))
+ {
+ delete params;
+
+ return false;
+ }
+
+ *ppParams = params;
+
+ return true;
+}
+#endif
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