diff options
Diffstat (limited to 'src/lib/prov/pkcs11/p11_ecdsa.cpp')
| -rw-r--r-- | src/lib/prov/pkcs11/p11_ecdsa.cpp | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/lib/prov/pkcs11/p11_ecdsa.cpp b/src/lib/prov/pkcs11/p11_ecdsa.cpp new file mode 100644 index 000000000..078bc429d --- /dev/null +++ b/src/lib/prov/pkcs11/p11_ecdsa.cpp @@ -0,0 +1,229 @@ +/* +* PKCS#11 ECDSA +* (C) 2016 Daniel Neus, Sirrix AG +* (C) 2016 Philipp Weber, Sirrix AG +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#include <botan/p11_ecdsa.h> + +#if defined(BOTAN_HAS_ECDSA) + +#include <botan/internal/p11_mechanism.h> +#include <botan/internal/algo_registry.h> +#include <botan/internal/pk_utils.h> +#include <botan/keypair.h> +#include <botan/rng.h> + +namespace Botan { +namespace PKCS11 { + +ECDSA_PublicKey PKCS11_ECDSA_PublicKey::export_key() const + { + return ECDSA_PublicKey(domain(), public_point()); + } + +bool PKCS11_ECDSA_PrivateKey::check_key(RandomNumberGenerator& rng, bool strong) const + { + if(!public_point().on_the_curve()) + { + return false; + } + + + if(!strong) + { + return true; + } + + return KeyPair::signature_consistency_check(rng, *this, "EMSA1(SHA-1)"); + } + +ECDSA_PrivateKey PKCS11_ECDSA_PrivateKey::export_key() const + { + auto priv_key = get_attribute_value(AttributeType::Value); + + Null_RNG rng; + return ECDSA_PrivateKey(rng, domain(), BigInt::decode(priv_key)); + } + +secure_vector<byte> PKCS11_ECDSA_PrivateKey::pkcs8_private_key() const + { + return export_key().pkcs8_private_key(); + } + +namespace { + +class PKCS11_ECDSA_Signature_Operation : public PK_Ops::Signature + { + public: + typedef PKCS11_EC_PrivateKey Key_Type; + + PKCS11_ECDSA_Signature_Operation(const PKCS11_EC_PrivateKey& key, const std::string& emsa) + : PK_Ops::Signature(), m_key(key), m_order(key.domain().get_order()), m_mechanism(MechanismWrapper::create_ecdsa_mechanism(emsa)) + {} + + size_t message_parts() const override + { + return 2; + } + + size_t message_part_size() const override + { + return m_order.bytes(); + } + + void update(const byte msg[], size_t msg_len) override + { + if(!m_initialized) + { + // first call to update: initialize and cache message because we can not determine yet whether a single- or multiple-part operation will be performed + m_key.module()->C_SignInit(m_key.session().handle(), m_mechanism.data(), m_key.handle()); + m_initialized = true; + m_first_message = secure_vector<byte>(msg, msg + msg_len); + return; + } + + if(!m_first_message.empty()) + { + // second call to update: start multiple-part operation + m_key.module()->C_SignUpdate(m_key.session().handle(), m_first_message); + m_first_message.clear(); + } + + m_key.module()->C_SignUpdate(m_key.session().handle(), const_cast<Byte*>(msg), msg_len); + } + + secure_vector<byte> sign(RandomNumberGenerator&) override + { + secure_vector<byte> signature; + if(!m_first_message.empty()) + { + // single call to update: perform single-part operation + m_key.module()->C_Sign(m_key.session().handle(), m_first_message, signature); + m_first_message.clear(); + } + else + { + // multiple calls to update (or none): finish multiple-part operation + m_key.module()->C_SignFinal(m_key.session().handle(), signature); + } + m_initialized = false; + return signature; + } + + private: + const PKCS11_EC_PrivateKey& m_key; + const BigInt& m_order; + MechanismWrapper m_mechanism; + secure_vector<byte> m_first_message; + bool m_initialized = false; + }; + + +class PKCS11_ECDSA_Verification_Operation : public PK_Ops::Verification + { + public: + typedef PKCS11_EC_PublicKey Key_Type; + + PKCS11_ECDSA_Verification_Operation(const PKCS11_EC_PublicKey& key, const std::string& emsa) + : PK_Ops::Verification(), m_key(key), m_order(key.domain().get_order()), m_mechanism(MechanismWrapper::create_ecdsa_mechanism(emsa)) + {} + + size_t message_parts() const override + { + return 2; + } + + size_t message_part_size() const override + { + return m_order.bytes(); + } + + size_t max_input_bits() const override + { + return m_order.bits(); + } + + void update(const byte msg[], size_t msg_len) override + { + if(!m_initialized) + { + // first call to update: initialize and cache message because we can not determine yet whether a single- or multiple-part operation will be performed + m_key.module()->C_VerifyInit(m_key.session().handle(), m_mechanism.data(), m_key.handle()); + m_initialized = true; + m_first_message = secure_vector<byte>(msg, msg + msg_len); + return; + } + + if(!m_first_message.empty()) + { + // second call to update: start multiple-part operation + m_key.module()->C_VerifyUpdate(m_key.session().handle(), m_first_message); + m_first_message.clear(); + } + + m_key.module()->C_VerifyUpdate(m_key.session().handle(), const_cast<Byte*>(msg), msg_len); + } + + bool is_valid_signature(const byte sig[], size_t sig_len) override + { + ReturnValue return_value = ReturnValue::SignatureInvalid; + if(!m_first_message.empty()) + { + // single call to update: perform single-part operation + m_key.module()->C_Verify(m_key.session().handle(), m_first_message.data(), m_first_message.size(), + const_cast<Byte*>(sig), sig_len, &return_value); + m_first_message.clear(); + } + else + { + // multiple calls to update (or none): finish multiple-part operation + m_key.module()->C_VerifyFinal(m_key.session().handle(), const_cast<Byte*>(sig), sig_len, &return_value); + } + m_initialized = false; + if(return_value != ReturnValue::OK && return_value != ReturnValue::SignatureInvalid) + { + throw PKCS11_ReturnError(return_value); + } + return return_value == ReturnValue::OK; + } + + private: + const PKCS11_EC_PublicKey& m_key; + const BigInt& m_order; + MechanismWrapper m_mechanism; + secure_vector<byte> m_first_message; + bool m_initialized = false; + }; + +BOTAN_REGISTER_TYPE(PK_Ops::Signature, PKCS11_ECDSA_Signature_Operation, "ECDSA", + (make_pk_op<PK_Ops::Signature, PKCS11_ECDSA_Signature_Operation>), "pkcs11", BOTAN_PKCS11_ECDSA_PRIO); + +BOTAN_REGISTER_TYPE(PK_Ops::Verification, PKCS11_ECDSA_Verification_Operation, "ECDSA", + (make_pk_op<PK_Ops::Verification, PKCS11_ECDSA_Verification_Operation>), "pkcs11", BOTAN_PKCS11_ECDSA_PRIO); + +} + +PKCS11_ECDSA_KeyPair generate_ecdsa_keypair(Session& session, const EC_PublicKeyGenerationProperties& pub_props, + const EC_PrivateKeyGenerationProperties& priv_props) + { + ObjectHandle pub_key_handle = 0; + ObjectHandle priv_key_handle = 0; + + Mechanism mechanism = { static_cast<CK_MECHANISM_TYPE>(MechanismType::EcKeyPairGen), nullptr, 0 }; + + session.module()->C_GenerateKeyPair(session.handle(), &mechanism, + pub_props.data(), pub_props.count(), priv_props.data(), priv_props.count(), + &pub_key_handle, &priv_key_handle); + + return std::make_pair(PKCS11_ECDSA_PublicKey(session, pub_key_handle), PKCS11_ECDSA_PrivateKey(session, + priv_key_handle)); + } + +} + +} + +#endif |