2 * EAP server/peer: EAP-pwd shared definitions
3 * Copyright (c) 2009, Dan Harkins <dharkins@lounge.org>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #ifndef EAP_PWD_COMMON_H
10 #define EAP_PWD_COMMON_H
12 #include <openssl/bn.h>
13 #include <openssl/ec.h>
14 #include <openssl/evp.h>
21 * definition of a finite cyclic group
22 * TODO: support one based on a prime field
24 typedef struct group_definition_ {
33 * EAP-pwd header, included on all payloads
34 * L(1 bit) | M(1 bit) | exch(6 bits) | total_length(if L is set)
36 #define EAP_PWD_HDR_SIZE 1
38 #define EAP_PWD_OPCODE_ID_EXCH 1
39 #define EAP_PWD_OPCODE_COMMIT_EXCH 2
40 #define EAP_PWD_OPCODE_CONFIRM_EXCH 3
41 #define EAP_PWD_GET_LENGTH_BIT(x) ((x) & 0x80)
42 #define EAP_PWD_SET_LENGTH_BIT(x) ((x) |= 0x80)
43 #define EAP_PWD_GET_MORE_BIT(x) ((x) & 0x40)
44 #define EAP_PWD_SET_MORE_BIT(x) ((x) |= 0x40)
45 #define EAP_PWD_GET_EXCHANGE(x) ((x) & 0x3f)
46 #define EAP_PWD_SET_EXCHANGE(x,y) ((x) |= (y))
48 /* EAP-pwd-ID payload */
52 #define EAP_PWD_DEFAULT_RAND_FUNC 1
54 #define EAP_PWD_DEFAULT_PRF 1
57 #define EAP_PWD_PREP_NONE 0
58 #define EAP_PWD_PREP_MS 1
59 u8 identity[0]; /* length inferred from payload */
63 int compute_password_element(EAP_PWD_group *grp, u16 num,
64 const u8 *password, size_t password_len,
65 const u8 *id_server, size_t id_server_len,
66 const u8 *id_peer, size_t id_peer_len,
68 int compute_keys(EAP_PWD_group *grp, BN_CTX *bnctx, const BIGNUM *k,
69 const BIGNUM *peer_scalar, const BIGNUM *server_scalar,
70 const u8 *confirm_peer, const u8 *confirm_server,
71 const u32 *ciphersuite, u8 *msk, u8 *emsk, u8 *session_id);
72 struct crypto_hash * eap_pwd_h_init(void);
73 void eap_pwd_h_update(struct crypto_hash *hash, const u8 *data, size_t len);
74 void eap_pwd_h_final(struct crypto_hash *hash, u8 *digest);
80 #endif /* EAP_PWD_COMMON_H */