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hostapd/src/eap_common/ikev2_common.h
Jouni Malinen 737754dc2b EAP-IKEv2: Remove obsolete ccns.pl project workarounds 
It does not look like there is going to be any additional use for this
old build option that could be used to build the EAP-IKEv2 peer
implementation in a way that interoperates with the eap-ikev2.ccns.pl
project. Remove the workarounds that matches incorrect implementation in
that project to clean up implementation.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-06-08 12:28:36 +03:00

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/*
* IKEv2 definitions
* Copyright (c) 2007, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef IKEV2_COMMON_H
#define IKEV2_COMMON_H
/*
* Nonce length must be at least 16 octets. It must also be at least half the
* key size of the negotiated PRF.
*/
#define IKEV2_NONCE_MIN_LEN 16
#define IKEV2_NONCE_MAX_LEN 256
/* IKE Header - RFC 4306, Sect. 3.1 */
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */
#define IKEV2_SPI_LEN 8
struct ikev2_hdr {
u8 i_spi[IKEV2_SPI_LEN]; /* IKE_SA Initiator's SPI */
u8 r_spi[IKEV2_SPI_LEN]; /* IKE_SA Responder's SPI */
u8 next_payload;
u8 version; /* MjVer | MnVer */
u8 exchange_type;
u8 flags;
u8 message_id[4];
u8 length[4]; /* total length of HDR + payloads */
} STRUCT_PACKED;
struct ikev2_payload_hdr {
u8 next_payload;
u8 flags;
u8 payload_length[2]; /* this payload, including the payload header */
} STRUCT_PACKED;
struct ikev2_proposal {
u8 type; /* 0 (last) or 2 (more) */
u8 reserved;
u8 proposal_length[2]; /* including all transform and attributes */
u8 proposal_num;
u8 protocol_id; /* IKEV2_PROTOCOL_* */
u8 spi_size;
u8 num_transforms;
/* SPI of spi_size octets */
/* Transforms */
} STRUCT_PACKED;
struct ikev2_transform {
u8 type; /* 0 (last) or 3 (more) */
u8 reserved;
u8 transform_length[2]; /* including Header and Attributes */
u8 transform_type;
u8 reserved2;
u8 transform_id[2];
/* Transform Attributes */
} STRUCT_PACKED;
#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */
/* Current IKEv2 version from RFC 4306 */
#define IKEV2_MjVer 2
#define IKEV2_MnVer 0
#define IKEV2_VERSION (((IKEV2_MjVer) << 4) | (IKEV2_MnVer))
/* IKEv2 Exchange Types */
enum {
/* 0-33 RESERVED */
IKE_SA_INIT = 34,
IKE_SA_AUTH = 35,
CREATE_CHILD_SA = 36,
INFORMATION = 37
/* 38-239 RESERVED TO IANA */
/* 240-255 Reserved for private use */
};
/* IKEv2 Flags */
#define IKEV2_HDR_INITIATOR 0x08
#define IKEV2_HDR_VERSION 0x10
#define IKEV2_HDR_RESPONSE 0x20
/* Payload Header Flags */
#define IKEV2_PAYLOAD_FLAGS_CRITICAL 0x01
/* EAP-IKEv2 Payload Types (in Next Payload Type field)
* http://www.iana.org/assignments/eap-ikev2-payloads */
enum {
IKEV2_PAYLOAD_NO_NEXT_PAYLOAD = 0,
IKEV2_PAYLOAD_SA = 33,
IKEV2_PAYLOAD_KEY_EXCHANGE = 34,
IKEV2_PAYLOAD_IDi = 35,
IKEV2_PAYLOAD_IDr = 36,
IKEV2_PAYLOAD_CERTIFICATE = 37,
IKEV2_PAYLOAD_CERT_REQ = 38,
IKEV2_PAYLOAD_AUTHENTICATION = 39,
IKEV2_PAYLOAD_NONCE = 40,
IKEV2_PAYLOAD_NOTIFICATION = 41,
IKEV2_PAYLOAD_VENDOD_ID = 43,
IKEV2_PAYLOAD_ENCRYPTED = 46,
IKEV2_PAYLOAD_NEXT_FAST_ID = 121
};
/* IKEv2 Proposal - Protocol ID */
enum {
IKEV2_PROTOCOL_RESERVED = 0,
IKEV2_PROTOCOL_IKE = 1, /* IKE is the only one allowed for EAP-IKEv2 */
IKEV2_PROTOCOL_AH = 2,
IKEV2_PROTOCOL_ESP = 3
};
/* IKEv2 Transform Types */
enum {
IKEV2_TRANSFORM_ENCR = 1,
IKEV2_TRANSFORM_PRF = 2,
IKEV2_TRANSFORM_INTEG = 3,
IKEV2_TRANSFORM_DH = 4,
IKEV2_TRANSFORM_ESN = 5
};
/* IKEv2 Transform Type 1 (Encryption Algorithm) */
enum {
ENCR_DES_IV64 = 1,
ENCR_DES = 2,
ENCR_3DES = 3,
ENCR_RC5 = 4,
ENCR_IDEA = 5,
ENCR_CAST = 6,
ENCR_BLOWFISH = 7,
ENCR_3IDEA = 8,
ENCR_DES_IV32 = 9,
ENCR_NULL = 11,
ENCR_AES_CBC = 12,
ENCR_AES_CTR = 13
};
/* IKEv2 Transform Type 2 (Pseudo-random Function) */
enum {
PRF_HMAC_MD5 = 1,
PRF_HMAC_SHA1 = 2,
PRF_HMAC_TIGER = 3,
PRF_AES128_XCBC = 4
};
/* IKEv2 Transform Type 3 (Integrity Algorithm) */
enum {
AUTH_HMAC_MD5_96 = 1,
AUTH_HMAC_SHA1_96 = 2,
AUTH_DES_MAC = 3,
AUTH_KPDK_MD5 = 4,
AUTH_AES_XCBC_96 = 5
};
/* IKEv2 Transform Type 4 (Diffie-Hellman Group) */
enum {
DH_GROUP1_768BIT_MODP = 1, /* RFC 4306 */
DH_GROUP2_1024BIT_MODP = 2, /* RFC 4306 */
DH_GROUP5_1536BIT_MODP = 5, /* RFC 3526 */
DH_GROUP5_2048BIT_MODP = 14, /* RFC 3526 */
DH_GROUP5_3072BIT_MODP = 15, /* RFC 3526 */
DH_GROUP5_4096BIT_MODP = 16, /* RFC 3526 */
DH_GROUP5_6144BIT_MODP = 17, /* RFC 3526 */
DH_GROUP5_8192BIT_MODP = 18 /* RFC 3526 */
};
/* Identification Data Types (RFC 4306, Sect. 3.5) */
enum {
ID_IPV4_ADDR = 1,
ID_FQDN = 2,
ID_RFC822_ADDR = 3,
ID_IPV6_ADDR = 5,
ID_DER_ASN1_DN = 9,
ID_DER_ASN1_GN= 10,
ID_KEY_ID = 11
};
/* Certificate Encoding (RFC 4306, Sect. 3.6) */
enum {
CERT_ENCODING_PKCS7_X509 = 1,
CERT_ENCODING_PGP_CERT = 2,
CERT_ENCODING_DNS_SIGNED_KEY = 3,
/* X.509 Certificate - Signature: DER encoded X.509 certificate whose
* public key is used to validate the sender's AUTH payload */
CERT_ENCODING_X509_CERT_SIGN = 4,
CERT_ENCODING_KERBEROS_TOKEN = 6,
/* DER encoded X.509 certificate revocation list */
CERT_ENCODING_CRL = 7,
CERT_ENCODING_ARL = 8,
CERT_ENCODING_SPKI_CERT = 9,
CERT_ENCODING_X509_CERT_ATTR = 10,
/* PKCS #1 encoded RSA key */
CERT_ENCODING_RAW_RSA_KEY = 11,
CERT_ENCODING_HASH_AND_URL_X509_CERT = 12,
CERT_ENCODING_HASH_AND_URL_X509_BUNDLE = 13
};
/* Authentication Method (RFC 4306, Sect. 3.8) */
enum {
AUTH_RSA_SIGN = 1,
AUTH_SHARED_KEY_MIC = 2,
AUTH_DSS_SIGN = 3
};
/* Notify Message Types (RFC 4306, Sect. 3.10.1) */
enum {
UNSUPPORTED_CRITICAL_PAYLOAD = 1,
INVALID_IKE_SPI = 4,
INVALID_MAJOR_VERSION = 5,
INVALID_SYNTAX = 7,
INVALID_MESSAGE_ID = 9,
INVALID_SPI = 11,
NO_PROPOSAL_CHOSEN = 14,
INVALID_KE_PAYLOAD = 17,
AUTHENTICATION_FAILED = 24,
SINGLE_PAIR_REQUIRED = 34,
NO_ADDITIONAL_SAS = 35,
INTERNAL_ADDRESS_FAILURE = 36,
FAILED_CP_REQUIRED = 37,
TS_UNACCEPTABLE = 38,
INVALID_SELECTORS = 39
};
struct ikev2_keys {
u8 *SK_d, *SK_ai, *SK_ar, *SK_ei, *SK_er, *SK_pi, *SK_pr;
size_t SK_d_len, SK_integ_len, SK_encr_len, SK_prf_len;
};
int ikev2_keys_set(struct ikev2_keys *keys);
void ikev2_free_keys(struct ikev2_keys *keys);
/* Maximum hash length for supported hash algorithms */
#define IKEV2_MAX_HASH_LEN 20
struct ikev2_integ_alg {
int id;
size_t key_len;
size_t hash_len;
};
struct ikev2_prf_alg {
int id;
size_t key_len;
size_t hash_len;
};
struct ikev2_encr_alg {
int id;
size_t key_len;
size_t block_size;
};
const struct ikev2_integ_alg * ikev2_get_integ(int id);
int ikev2_integ_hash(int alg, const u8 *key, size_t key_len, const u8 *data,
size_t data_len, u8 *hash);
const struct ikev2_prf_alg * ikev2_get_prf(int id);
int ikev2_prf_hash(int alg, const u8 *key, size_t key_len,
size_t num_elem, const u8 *addr[], const size_t *len,
u8 *hash);
int ikev2_prf_plus(int alg, const u8 *key, size_t key_len,
const u8 *data, size_t data_len,
u8 *out, size_t out_len);
const struct ikev2_encr_alg * ikev2_get_encr(int id);
int ikev2_encr_encrypt(int alg, const u8 *key, size_t key_len, const u8 *iv,
const u8 *plain, u8 *crypt, size_t len);
int ikev2_encr_decrypt(int alg, const u8 *key, size_t key_len, const u8 *iv,
const u8 *crypt, u8 *plain, size_t len);
int ikev2_derive_auth_data(int prf_alg, const struct wpabuf *sign_msg,
const u8 *ID, size_t ID_len, u8 ID_type,
struct ikev2_keys *keys, int initiator,
const u8 *shared_secret, size_t shared_secret_len,
const u8 *nonce, size_t nonce_len,
const u8 *key_pad, size_t key_pad_len,
u8 *auth_data);
struct ikev2_payloads {
const u8 *sa;
size_t sa_len;
const u8 *ke;
size_t ke_len;
const u8 *idi;
size_t idi_len;
const u8 *idr;
size_t idr_len;
const u8 *cert;
size_t cert_len;
const u8 *auth;
size_t auth_len;
const u8 *nonce;
size_t nonce_len;
const u8 *encrypted;
size_t encrypted_len;
u8 encr_next_payload;
const u8 *notification;
size_t notification_len;
};
int ikev2_parse_payloads(struct ikev2_payloads *payloads,
u8 next_payload, const u8 *pos, const u8 *end);
u8 * ikev2_decrypt_payload(int encr_id, int integ_id, struct ikev2_keys *keys,
int initiator, const struct ikev2_hdr *hdr,
const u8 *encrypted, size_t encrypted_len,
size_t *res_len);
void ikev2_update_hdr(struct wpabuf *msg);
int ikev2_build_encrypted(int encr_id, int integ_id, struct ikev2_keys *keys,
int initiator, struct wpabuf *msg,
struct wpabuf *plain, u8 next_payload);
int ikev2_derive_sk_keys(const struct ikev2_prf_alg *prf,
const struct ikev2_integ_alg *integ,
const struct ikev2_encr_alg *encr,
const u8 *skeyseed, const u8 *data, size_t data_len,
struct ikev2_keys *keys);
#endif /* IKEV2_COMMON_H */
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