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Diffstat (limited to 'SoftHSMv2/src/lib/crypto/BotanECDSA.cpp')
-rw-r--r-- | SoftHSMv2/src/lib/crypto/BotanECDSA.cpp | 465 |
1 files changed, 465 insertions, 0 deletions
diff --git a/SoftHSMv2/src/lib/crypto/BotanECDSA.cpp b/SoftHSMv2/src/lib/crypto/BotanECDSA.cpp new file mode 100644 index 0000000..06b7a0f --- /dev/null +++ b/SoftHSMv2/src/lib/crypto/BotanECDSA.cpp @@ -0,0 +1,465 @@ +/* + * Copyright (c) 2010 .SE (The Internet Infrastructure Foundation) + * 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. + */ + +/***************************************************************************** + BotanECDSA.cpp + + Botan ECDSA asymmetric algorithm implementation + *****************************************************************************/ + +#include "config.h" +#ifdef WITH_ECC +#include "log.h" +#include "BotanECDSA.h" +#include "BotanRNG.h" +#include "CryptoFactory.h" +#include "BotanCryptoFactory.h" +#include "ECParameters.h" +#include "BotanECDSAKeyPair.h" +#include "BotanUtil.h" +#include <algorithm> +#include <botan/ec_group.h> +#include <botan/ecdsa.h> +#include <botan/version.h> +#include <iostream> + +// Constructor +BotanECDSA::BotanECDSA() +{ + signer = NULL; + verifier = NULL; +} + +// Destructor +BotanECDSA::~BotanECDSA() +{ + delete signer; + delete verifier; +} + +// Signing functions +bool BotanECDSA::sign(PrivateKey* privateKey, const ByteString& dataToSign, + ByteString& signature, const AsymMech::Type mechanism, + const void* /* param = NULL */, const size_t /* paramLen = 0 */) +{ + std::string emsa; + + if (mechanism == AsymMech::ECDSA) + { + emsa = "Raw"; + } + else + { + ERROR_MSG("Invalid mechanism supplied (%i)", mechanism); + return false; + } + + // Check if the private key is the right type + if (!privateKey->isOfType(BotanECDSAPrivateKey::type)) + { + ERROR_MSG("Invalid key type supplied"); + + return false; + } + + BotanECDSAPrivateKey* pk = (BotanECDSAPrivateKey*) privateKey; + Botan::ECDSA_PrivateKey* botanKey = pk->getBotanKey(); + + if (botanKey == NULL) + { + ERROR_MSG("Could not get the Botan private key"); + + return false; + } + + try + { +#if BOTAN_VERSION_CODE >= BOTAN_VERSION_CODE_FOR(1,11,33) + BotanRNG* rng = (BotanRNG*)BotanCryptoFactory::i()->getRNG(); + signer = new Botan::PK_Signer(*botanKey, *rng->getRNG(), emsa); +#else + signer = new Botan::PK_Signer(*botanKey, emsa); +#endif + // Should we add DISABLE_FAULT_PROTECTION? Makes this operation faster. + } + catch (...) + { + ERROR_MSG("Could not create the signer token"); + + return false; + } + + // Perform the signature operation +#if BOTAN_VERSION_CODE >= BOTAN_VERSION_CODE_FOR(1,11,0) + std::vector<Botan::byte> signResult; +#else + Botan::SecureVector<Botan::byte> signResult; +#endif + try + { + BotanRNG* rng = (BotanRNG*)BotanCryptoFactory::i()->getRNG(); + signResult = signer->sign_message(dataToSign.const_byte_str(), dataToSign.size(), *rng->getRNG()); + } + catch (...) + { + ERROR_MSG("Could not sign the data"); + + delete signer; + signer = NULL; + + return false; + } + + // Return the result + signature.resize(signResult.size()); +#if BOTAN_VERSION_CODE >= BOTAN_VERSION_CODE_FOR(1,11,0) + memcpy(&signature[0], signResult.data(), signResult.size()); +#else + memcpy(&signature[0], signResult.begin(), signResult.size()); +#endif + + delete signer; + signer = NULL; + + return true; +} + +// Signing functions +bool BotanECDSA::signInit(PrivateKey* /*privateKey*/, const AsymMech::Type /*mechanism*/, + const void* /* param = NULL */, const size_t /* paramLen = 0 */) +{ + ERROR_MSG("ECDSA does not support multi part signing"); + + return false; +} + +bool BotanECDSA::signUpdate(const ByteString& /*dataToSign*/) +{ + ERROR_MSG("ECDSA does not support multi part signing"); + + return false; +} + +bool BotanECDSA::signFinal(ByteString& /*signature*/) +{ + ERROR_MSG("ECDSA does not support multi part signing"); + + return false; +} + +// Verification functions +bool BotanECDSA::verify(PublicKey* publicKey, const ByteString& originalData, + const ByteString& signature, const AsymMech::Type mechanism, + const void* /* param = NULL */, const size_t /* paramLen = 0 */) +{ + std::string emsa; + + if (mechanism == AsymMech::ECDSA) + { + emsa = "Raw"; + } + else + { + ERROR_MSG("Invalid mechanism supplied (%i)", mechanism); + + return false; + } + + // Check if the public key is the right type + if (!publicKey->isOfType(BotanECDSAPublicKey::type)) + { + ERROR_MSG("Invalid key type supplied"); + + return false; + } + + BotanECDSAPublicKey* pk = (BotanECDSAPublicKey*) publicKey; + Botan::ECDSA_PublicKey* botanKey = pk->getBotanKey(); + + if (botanKey == NULL) + { + ERROR_MSG("Could not get the Botan public key"); + + return false; + } + + try + { + verifier = new Botan::PK_Verifier(*botanKey, emsa); + } + catch (...) + { + ERROR_MSG("Could not create the verifier token"); + + return false; + } + + // Perform the verify operation + bool verResult; + try + { + verResult = verifier->verify_message(originalData.const_byte_str(), + originalData.size(), + signature.const_byte_str(), + signature.size()); + } + catch (...) + { + ERROR_MSG("Could not check the signature"); + + delete verifier; + verifier = NULL; + + return false; + } + + delete verifier; + verifier = NULL; + + return verResult; +} + +// Verification functions +bool BotanECDSA::verifyInit(PublicKey* /*publicKey*/, const AsymMech::Type /*mechanism*/, + const void* /* param = NULL */, const size_t /* paramLen = 0 */) +{ + ERROR_MSG("ECDSA does not support multi part verifying"); + + return false; +} + +bool BotanECDSA::verifyUpdate(const ByteString& /*originalData*/) +{ + ERROR_MSG("ECDSA does not support multi part verifying"); + + return false; +} + +bool BotanECDSA::verifyFinal(const ByteString& /*signature*/) +{ + ERROR_MSG("ECDSA does not support multi part verifying"); + + return false; +} + +// Encryption functions +bool BotanECDSA::encrypt(PublicKey* /*publicKey*/, const ByteString& /*data*/, + ByteString& /*encryptedData*/, const AsymMech::Type /*padding*/) +{ + ERROR_MSG("ECDSA does not support encryption"); + + return false; +} + +// Decryption functions +bool BotanECDSA::decrypt(PrivateKey* /*privateKey*/, const ByteString& /*encryptedData*/, + ByteString& /*data*/, const AsymMech::Type /*padding*/) +{ + ERROR_MSG("ECDSA does not support decryption"); + + return false; +} + +// Key factory +bool BotanECDSA::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 ECDSA key generation"); + + return false; + } + + ECParameters* params = (ECParameters*) parameters; + + // Generate the key-pair + Botan::ECDSA_PrivateKey* eckp = NULL; + try + { + BotanRNG* rng = (BotanRNG*)BotanCryptoFactory::i()->getRNG(); + eckp = new Botan::ECDSA_PrivateKey(*rng->getRNG(), BotanUtil::byteString2ECGroup(params->getEC())); + } + catch (...) + { + ERROR_MSG("ECDSA key generation failed"); + + return false; + } + + // Create an asymmetric key-pair object to return + BotanECDSAKeyPair* kp = new BotanECDSAKeyPair(); + + ((BotanECDSAPublicKey*) kp->getPublicKey())->setFromBotan(eckp); + ((BotanECDSAPrivateKey*) kp->getPrivateKey())->setFromBotan(eckp); + + *ppKeyPair = kp; + + // Release the key + delete eckp; + + return true; +} + +unsigned long BotanECDSA::getMinKeySize() +{ + // Smallest EC group is secp112r1 + return 112; +} + +unsigned long BotanECDSA::getMaxKeySize() +{ + // Biggest EC group is secp521r1 + return 521; +} + +bool BotanECDSA::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); + + BotanECDSAKeyPair* kp = new BotanECDSAKeyPair(); + + bool rv = true; + + if (!((ECPublicKey*) kp->getPublicKey())->deserialise(dPub)) + { + rv = false; + } + + if (!((ECPrivateKey*) kp->getPrivateKey())->deserialise(dPriv)) + { + rv = false; + } + + if (!rv) + { + delete kp; + + return false; + } + + *ppKeyPair = kp; + + return true; +} + +bool BotanECDSA::reconstructPublicKey(PublicKey** ppPublicKey, ByteString& serialisedData) +{ + // Check input + if ((ppPublicKey == NULL) || + (serialisedData.size() == 0)) + { + return false; + } + + BotanECDSAPublicKey* pub = new BotanECDSAPublicKey(); + + if (!pub->deserialise(serialisedData)) + { + delete pub; + + return false; + } + + *ppPublicKey = pub; + + return true; +} + +bool BotanECDSA::reconstructPrivateKey(PrivateKey** ppPrivateKey, ByteString& serialisedData) +{ + // Check input + if ((ppPrivateKey == NULL) || + (serialisedData.size() == 0)) + { + return false; + } + + BotanECDSAPrivateKey* priv = new BotanECDSAPrivateKey(); + + if (!priv->deserialise(serialisedData)) + { + delete priv; + + return false; + } + + *ppPrivateKey = priv; + + return true; +} + +PublicKey* BotanECDSA::newPublicKey() +{ + return (PublicKey*) new BotanECDSAPublicKey(); +} + +PrivateKey* BotanECDSA::newPrivateKey() +{ + return (PrivateKey*) new BotanECDSAPrivateKey(); +} + +AsymmetricParameters* BotanECDSA::newParameters() +{ + return (AsymmetricParameters*) new ECParameters(); +} + +bool BotanECDSA::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 |