pk_keys.cpp

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/*
* PK Key Types
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#include <botan/pk_keys.h>
#include <botan/internal/pk_ops.h>
#include <botan/internal/fmt.h>
#include <botan/der_enc.h>
#include <botan/hash.h>
#include <botan/hex.h>
 
namespace Botan {
 
const BigInt& Asymmetric_Key::get_int_field(std::string_view field) const
   {
   throw Unknown_PK_Field_Name(algo_name(), field);
   }
 
OID Asymmetric_Key::object_identifier() const
   {
   try
      {
      return OID::from_string(algo_name());
      }
   catch(Lookup_Error&)
      {
      throw Lookup_Error(fmt("Public key algorithm {} has no defined OIDs", algo_name()));
      }
   }
 
std::string create_hex_fingerprint(const uint8_t bits[],
                                   size_t bits_len,
                                   std::string_view hash_name)
   {
   auto hash_fn = HashFunction::create_or_throw(hash_name);
   const std::string hex_hash = hex_encode(hash_fn->process(bits, bits_len));
 
   std::string fprint;
 
   for(size_t i = 0; i != hex_hash.size(); i += 2)
      {
      if(i != 0)
         fprint.push_back(':');
 
      fprint.push_back(hex_hash[i]);
      fprint.push_back(hex_hash[i+1]);
      }
 
   return fprint;
   }
 
std::vector<uint8_t> Public_Key::subject_public_key() const
   {
   std::vector<uint8_t> output;
 
   DER_Encoder(output).start_sequence()
         .encode(algorithm_identifier())
         .encode(public_key_bits(), ASN1_Type::BitString)
      .end_cons();
 
   return output;
   }
 
secure_vector<uint8_t> Private_Key::private_key_info() const
   {
   const size_t PKCS8_VERSION = 0;
 
   return DER_Encoder()
         .start_sequence()
            .encode(PKCS8_VERSION)
            .encode(pkcs8_algorithm_identifier())
            .encode(private_key_bits(), ASN1_Type::OctetString)
         .end_cons()
      .get_contents();
   }
 
secure_vector<uint8_t> Private_Key::raw_private_key_bits() const
   {
   throw Not_Implemented(algo_name() + " does not implement raw_private_key_bits");
   }
 
/*
* Hash of the X.509 subjectPublicKey encoding
*/
std::string Public_Key::fingerprint_public(std::string_view hash_algo) const
   {
   return create_hex_fingerprint(subject_public_key(), hash_algo);
   }
 
/*
* Hash of the PKCS #8 encoding for this key object
*/
std::string Private_Key::fingerprint_private(std::string_view hash_algo) const
   {
   return create_hex_fingerprint(private_key_bits(), hash_algo);
   }
 
std::unique_ptr<PK_Ops::Encryption>
Public_Key::create_encryption_op(RandomNumberGenerator& /*rng*/,
                                 std::string_view /*params*/,
                                 std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support encryption", algo_name()));
   }
 
std::unique_ptr<PK_Ops::KEM_Encryption>
Public_Key::create_kem_encryption_op(std::string_view /*params*/,
                                     std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support KEM encryption", algo_name()));
   }
 
std::unique_ptr<PK_Ops::Verification>
Public_Key::create_verification_op(std::string_view /*params*/,
                                   std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support verification", algo_name()));
   }
 
std::unique_ptr<PK_Ops::Verification>
Public_Key::create_x509_verification_op(const AlgorithmIdentifier& /*params*/,
                                        std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support X.509 verification", algo_name()));
   }
 
std::unique_ptr<PK_Ops::Decryption>
Private_Key::create_decryption_op(RandomNumberGenerator& /*rng*/,
                                  std::string_view /*params*/,
                                  std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support decryption", algo_name()));
   }
 
std::unique_ptr<PK_Ops::KEM_Decryption>
Private_Key::create_kem_decryption_op(RandomNumberGenerator& /*rng*/,
                                      std::string_view /*params*/,
                                      std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support KEM decryption", algo_name()));
   }
 
std::unique_ptr<PK_Ops::Signature>
Private_Key::create_signature_op(RandomNumberGenerator& /*rng*/,
                                 std::string_view /*params*/,
                                 std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support signatures", algo_name()));
   }
 
std::unique_ptr<PK_Ops::Key_Agreement>
Private_Key::create_key_agreement_op(RandomNumberGenerator& /*rng*/,
                                     std::string_view /*params*/,
                                     std::string_view /*provider*/) const
   {
   throw Lookup_Error(fmt("{} does not support key agreement", algo_name()));
   }
 
}