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/*
* X.509 Public Key
* (C) 1999-2010 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/x509_key.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/pem.h>
#include <botan/alg_id.h>
#include <botan/pk_algs.h>
namespace Botan {
namespace X509 {
std::vector<uint8_t> BER_encode(const Public_Key& key)
{
// keeping it around for compat
return key.subject_public_key();
}
/*
* PEM encode a X.509 public key
*/
std::string PEM_encode(const Public_Key& key)
{
return PEM_Code::encode(key.subject_public_key(),
"PUBLIC KEY");
}
/*
* Extract a public key and return it
*/
Public_Key* load_key(DataSource& source)
{
try {
AlgorithmIdentifier alg_id;
std::vector<uint8_t> key_bits;
if(ASN1::maybe_BER(source) && !PEM_Code::matches(source))
{
BER_Decoder(source)
.start_cons(SEQUENCE)
.decode(alg_id)
.decode(key_bits, BIT_STRING)
.verify_end()
.end_cons();
}
else
{
DataSource_Memory ber(
PEM_Code::decode_check_label(source, "PUBLIC KEY")
);
BER_Decoder(ber)
.start_cons(SEQUENCE)
.decode(alg_id)
.decode(key_bits, BIT_STRING)
.verify_end()
.end_cons();
}
if(key_bits.empty())
throw Decoding_Error("X.509 public key decoding failed");
return load_public_key(alg_id, key_bits).release();
}
catch(Decoding_Error& e)
{
throw Decoding_Error("X.509 public key decoding failed: " + std::string(e.what()));
}
}
#if defined(BOTAN_TARGET_OS_HAS_FILESYSTEM)
/*
* Extract a public key and return it
*/
Public_Key* load_key(const std::string& fsname)
{
DataSource_Stream source(fsname, true);
return X509::load_key(source);
}
#endif
/*
* Extract a public key and return it
*/
Public_Key* load_key(const std::vector<uint8_t>& mem)
{
DataSource_Memory source(mem);
return X509::load_key(source);
}
/*
* Make a copy of this public key
*/
Public_Key* copy_key(const Public_Key& key)
{
DataSource_Memory source(PEM_encode(key));
return X509::load_key(source);
}
}
}
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