Botan: src/constructs/srp6/srp6.h Source File

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srp6.h
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1 /*
2 * SRP-6a (RFC 5054 compatatible)
3 * (C) 2011,2012 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7
8 #ifndef BOTAN_RFC5054_SRP6_H__
9 #define BOTAN_RFC5054_SRP6_H__
10
11 #include <botan/bigint.h>
12 #include <botan/hash.h>
13 #include <botan/rng.h>
14 #include <botan/symkey.h>
15 #include <string>
16
17 namespace Botan {
18
19 /**
20 * SRP6a Client side
21 * @param username the username we are attempting login for
22 * @param password the password we are attempting to use
23 * @param group_id specifies the shared SRP group
24 * @param hash_id specifies a secure hash function
25 * @param salt is the salt value sent by the server
26 * @param B is the server's public value
27 * @param rng is a random number generator
28 *
29 * @return (A,K) the client public key and the shared secret key
30 */
31 std::pair<BigInt,SymmetricKey>
32 BOTAN_DLL srp6_client_agree(const std::string& username,
33 const std::string& password,
34 const std::string& group_id,
35 const std::string& hash_id,
36 const MemoryRegion<byte>& salt,
37 const BigInt& B,
38 RandomNumberGenerator& rng);
39
40 /**
41 * Generate a new SRP-6 verifier
42 * @param identifier a username or other client identifier
43 * @param password the secret used to authenticate user
44 * @param salt a randomly chosen value, at least 128 bits long
45 */
46 BigInt BOTAN_DLL generate_srp6_verifier(const std::string& identifier,
47 const std::string& password,
48 const MemoryRegion<byte>& salt,
49 const std::string& group_id,
50 const std::string& hash_id);
51
52 /**
53 * Return the group id for this SRP param set, or else thrown an
54 * exception
55 */
56 std::string BOTAN_DLL srp6_group_identifier(const BigInt& N, const BigInt& g);
57
58 /**
59 * Represents a SRP-6a server session
60 */
61 class BOTAN_DLL SRP6_Server_Session
62 {
63 public:
64 /**
65 * Server side step 1
66 * @param v the verification value saved from client registration
67 */
68 BigInt step1(const BigInt& v,
69 const std::string& group_id,
70 const std::string& hash_id,
71 RandomNumberGenerator& rng);
72
73 SymmetricKey step2(const BigInt& A);
74
75 private:
76 std::string hash_id;
77 BigInt B, b, v, S, p;
78 size_t p_bytes;
79 };
80
81 }
82
83 #endif
Botan::OctetString
Definition: symkey.h:19
Botan::generate_srp6_verifier
BigInt generate_srp6_verifier(const std::string &identifier, const std::string &password, const MemoryRegion< byte > &salt, const std::string &group_id, const std::string &hash_id)
Definition: srp6.cpp:130
Botan::BigInt
Definition: bigint.h:22
Botan::RandomNumberGenerator
Definition: rng.h:20
Botan::srp6_client_agree
std::pair< BigInt, SymmetricKey > srp6_client_agree(const std::string &identifier, const std::string &password, const std::string &group_id, const std::string &hash_id, const MemoryRegion< byte > &salt, const BigInt &B, RandomNumberGenerator &rng)
Definition: srp6.cpp:96
Botan::SRP6_Server_Session
Definition: srp6.h:61
Botan
Definition: algo_base.h:14
Botan::srp6_group_identifier
std::string srp6_group_identifier(const BigInt &N, const BigInt &g)
Definition: srp6.cpp:72