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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/data_src.h>
#include <botan/ber_dec.h>
#include <botan/pem.h>
#include <botan/asn1_obj.h>
#include <botan/pk_algs.h>
namespace Botan::X509 {
/*
* 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_sequence()
.decode(alg_id)
.decode(key_bits, ASN1_Type::BitString)
.end_cons();
}
else
{
DataSource_Memory ber(
PEM_Code::decode_check_label(source, "PUBLIC KEY")
);
BER_Decoder(ber)
.start_sequence()
.decode(alg_id)
.decode(key_bits, ASN1_Type::BitString)
.end_cons();
}
if(key_bits.empty())
throw Decoding_Error("X.509 public key decoding");
return load_public_key(alg_id, key_bits).release();
}
catch(Decoding_Error& e)
{
throw Decoding_Error("X.509 public key decoding", e);
}
}
}
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