/src/botan/build/include/botan/elgamal.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * ElGamal |
3 | | * (C) 1999-2007 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #ifndef BOTAN_ELGAMAL_H_ |
9 | | #define BOTAN_ELGAMAL_H_ |
10 | | |
11 | | #include <botan/dl_algo.h> |
12 | | |
13 | | namespace Botan { |
14 | | |
15 | | /** |
16 | | * ElGamal Public Key |
17 | | */ |
18 | | class BOTAN_PUBLIC_API(2,0) ElGamal_PublicKey : public virtual DL_Scheme_PublicKey |
19 | | { |
20 | | public: |
21 | 0 | std::string algo_name() const override { return "ElGamal"; } |
22 | 0 | DL_Group_Format group_format() const override { return DL_Group_Format::ANSI_X9_42; } |
23 | | |
24 | | /** |
25 | | * Load a public key. |
26 | | * @param alg_id the X.509 algorithm identifier |
27 | | * @param key_bits DER encoded public key bits |
28 | | */ |
29 | | ElGamal_PublicKey(const AlgorithmIdentifier& alg_id, |
30 | | const std::vector<uint8_t>& key_bits) : |
31 | | DL_Scheme_PublicKey(alg_id, key_bits, DL_Group_Format::ANSI_X9_42) |
32 | 0 | {} Unexecuted instantiation: Botan::ElGamal_PublicKey::ElGamal_PublicKey(Botan::AlgorithmIdentifier const&, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > const&) Unexecuted instantiation: Botan::ElGamal_PublicKey::ElGamal_PublicKey(Botan::AlgorithmIdentifier const&, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > const&) |
33 | | |
34 | | /** |
35 | | * Create a public key. |
36 | | * @param group the underlying DL group |
37 | | * @param y the public value y = g^x mod p |
38 | | */ |
39 | | ElGamal_PublicKey(const DL_Group& group, const BigInt& y); |
40 | | |
41 | | std::unique_ptr<PK_Ops::Encryption> |
42 | | create_encryption_op(RandomNumberGenerator& rng, |
43 | | const std::string& params, |
44 | | const std::string& provider) const override; |
45 | | |
46 | | protected: |
47 | 0 | ElGamal_PublicKey() = default; |
48 | | }; |
49 | | |
50 | | /** |
51 | | * ElGamal Private Key |
52 | | */ |
53 | | class BOTAN_PUBLIC_API(2,0) ElGamal_PrivateKey final : public ElGamal_PublicKey, |
54 | | public virtual DL_Scheme_PrivateKey |
55 | | { |
56 | | public: |
57 | | bool check_key(RandomNumberGenerator& rng, bool) const override; |
58 | | |
59 | | /** |
60 | | * Load a private key. |
61 | | * @param alg_id the X.509 algorithm identifier |
62 | | * @param key_bits DER encoded key bits in ANSI X9.42 format |
63 | | */ |
64 | | ElGamal_PrivateKey(const AlgorithmIdentifier& alg_id, |
65 | | const secure_vector<uint8_t>& key_bits); |
66 | | |
67 | | /** |
68 | | * Create a private key. |
69 | | * @param rng random number generator to use |
70 | | * @param group the group to be used in the key |
71 | | * @param priv_key the key's secret value (or if zero, generate a new key) |
72 | | */ |
73 | | ElGamal_PrivateKey(RandomNumberGenerator& rng, |
74 | | const DL_Group& group, |
75 | | const BigInt& priv_key = BigInt::zero()); |
76 | | |
77 | | std::unique_ptr<Public_Key> public_key() const override; |
78 | | |
79 | | std::unique_ptr<PK_Ops::Decryption> |
80 | | create_decryption_op(RandomNumberGenerator& rng, |
81 | | const std::string& params, |
82 | | const std::string& provider) const override; |
83 | | }; |
84 | | |
85 | | } |
86 | | |
87 | | #endif |