/src/Botan-3.4.0/src/lib/pubkey/x509_key.cpp
Line | Count | Source |
1 | | /* |
2 | | * X.509 Public Key |
3 | | * (C) 1999-2010 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #include <botan/x509_key.h> |
9 | | |
10 | | #include <botan/asn1_obj.h> |
11 | | #include <botan/ber_dec.h> |
12 | | #include <botan/data_src.h> |
13 | | #include <botan/pem.h> |
14 | | #include <botan/pk_algs.h> |
15 | | |
16 | | namespace Botan::X509 { |
17 | | |
18 | | /* |
19 | | * PEM encode a X.509 public key |
20 | | */ |
21 | 0 | std::string PEM_encode(const Public_Key& key) { |
22 | 0 | return PEM_Code::encode(key.subject_public_key(), "PUBLIC KEY"); |
23 | 0 | } |
24 | | |
25 | | /* |
26 | | * Extract a public key and return it |
27 | | */ |
28 | 0 | std::unique_ptr<Public_Key> load_key(DataSource& source) { |
29 | 0 | try { |
30 | 0 | AlgorithmIdentifier alg_id; |
31 | 0 | std::vector<uint8_t> key_bits; |
32 | |
|
33 | 0 | if(ASN1::maybe_BER(source) && !PEM_Code::matches(source)) { |
34 | 0 | BER_Decoder(source).start_sequence().decode(alg_id).decode(key_bits, ASN1_Type::BitString).end_cons(); |
35 | 0 | } else { |
36 | 0 | DataSource_Memory ber(PEM_Code::decode_check_label(source, "PUBLIC KEY")); |
37 | |
|
38 | 0 | BER_Decoder(ber).start_sequence().decode(alg_id).decode(key_bits, ASN1_Type::BitString).end_cons(); |
39 | 0 | } |
40 | |
|
41 | 0 | if(key_bits.empty()) { |
42 | 0 | throw Decoding_Error("X.509 public key decoding"); |
43 | 0 | } |
44 | | |
45 | 0 | return load_public_key(alg_id, key_bits); |
46 | 0 | } catch(Decoding_Error& e) { |
47 | 0 | throw Decoding_Error("X.509 public key decoding", e); |
48 | 0 | } |
49 | 0 | } |
50 | | |
51 | | } // namespace Botan::X509 |