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>
17 * definition of a finite cyclic group
18 * TODO: support one based on a prime field
20 typedef struct group_definition_ {
29 * EAP-pwd header, included on all payloads
30 * L(1 bit) | M(1 bit) | exch(6 bits) | total_length(if L is set)
32 #define EAP_PWD_HDR_SIZE 1
34 #define EAP_PWD_OPCODE_ID_EXCH 1
35 #define EAP_PWD_OPCODE_COMMIT_EXCH 2
36 #define EAP_PWD_OPCODE_CONFIRM_EXCH 3
37 #define EAP_PWD_GET_LENGTH_BIT(x) ((x) & 0x80)
38 #define EAP_PWD_SET_LENGTH_BIT(x) ((x) |= 0x80)
39 #define EAP_PWD_GET_MORE_BIT(x) ((x) & 0x40)
40 #define EAP_PWD_SET_MORE_BIT(x) ((x) |= 0x40)
41 #define EAP_PWD_GET_EXCHANGE(x) ((x) & 0x3f)
42 #define EAP_PWD_SET_EXCHANGE(x,y) ((x) |= (y))
44 /* EAP-pwd-ID payload */
48 #define EAP_PWD_DEFAULT_RAND_FUNC 1
50 #define EAP_PWD_DEFAULT_PRF 1
53 #define EAP_PWD_PREP_NONE 0
54 #define EAP_PWD_PREP_MS 1
55 u8 identity[0]; /* length inferred from payload */
59 int compute_password_element(EAP_PWD_group *, u16, u8 *, int, u8 *, int, u8 *,
61 int compute_keys(EAP_PWD_group *, BN_CTX *, BIGNUM *, BIGNUM *, BIGNUM *,
62 u8 *, u8 *, u32 *, u8 *, u8 *, u8 *);
63 struct crypto_hash * eap_pwd_h_init(void);
64 void eap_pwd_h_update(struct crypto_hash *hash, const u8 *data, size_t len);
65 void eap_pwd_h_final(struct crypto_hash *hash, u8 *digest);
67 #endif /* EAP_PWD_COMMON_H */