diff options
Diffstat (limited to 'src/charon/plugins/eap_radius/radius_message.c')
| -rw-r--r-- | src/charon/plugins/eap_radius/radius_message.c | 476 |
1 files changed, 0 insertions, 476 deletions
diff --git a/src/charon/plugins/eap_radius/radius_message.c b/src/charon/plugins/eap_radius/radius_message.c deleted file mode 100644 index 11a1d8dfc..000000000 --- a/src/charon/plugins/eap_radius/radius_message.c +++ /dev/null @@ -1,476 +0,0 @@ -/* - * Copyright (C) 2009 Martin Willi - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - */ - -#include "radius_message.h" - -#include <daemon.h> -#include <crypto/hashers/hasher.h> - -typedef struct private_radius_message_t private_radius_message_t; -typedef struct rmsg_t rmsg_t; -typedef struct rattr_t rattr_t; - -/** - * RADIUS message header - */ -struct rmsg_t { - /** message code, radius_message_code_t */ - u_int8_t code; - /** message identifier */ - u_int8_t identifier; - /** length of Code, Identifier, Length, Authenticator and Attributes */ - u_int16_t length; - /** message authenticator, MD5 hash */ - u_int8_t authenticator[HASH_SIZE_MD5]; - /** variable list of packed attributes */ - u_int8_t attributes[]; -} __attribute__((packed)); - -/** - * RADIUS message attribute. - */ -struct rattr_t { - /** attribute type, radius_attribute_type_t */ - u_int8_t type; - /** length of the attriubte, including the Type, Length and Value fields */ - u_int8_t length; - /** variable length attribute value */ - u_int8_t value[]; -} __attribute__((packed)); - -/** - * Private data of an radius_message_t object. - */ -struct private_radius_message_t { - - /** - * Public radius_message_t interface. - */ - radius_message_t public; - - /** - * message data, allocated - */ - rmsg_t *msg; -}; - -ENUM_BEGIN(radius_message_code_names, RMC_ACCESS_REQUEST, RMC_ACCOUNTING_RESPONSE, - "Access-Request", - "Access-Accept", - "Access-Reject", - "Accounting-Request", - "Accounting-Response"); -ENUM_NEXT(radius_message_code_names, RMC_ACCESS_CHALLENGE, RMC_ACCESS_CHALLENGE, RMC_ACCOUNTING_RESPONSE, - "Access-Challenge"); -ENUM_END(radius_message_code_names, RMC_ACCESS_CHALLENGE); - -ENUM(radius_attribute_type_names, RAT_USER_NAME, RAT_MIP6_HOME_LINK_PREFIX, - "User-Name", - "User-Password", - "CHAP-Password", - "NAS-IP-Address", - "NAS-Port", - "Service-Type", - "Framed-Protocol", - "Framed-IP-Address", - "Framed-IP-Netmask", - "Framed-Routing", - "Filter-Id", - "Framed-MTU", - "Framed-Compression", - "Login-IP-Host", - "Login-Service", - "Login-TCP-Port", - "Unassigned", - "Reply-Message", - "Callback-Number", - "Callback-Id", - "Unassigned", - "Framed-Route", - "Framed-IPX-Network", - "State", - "Class", - "Vendor-Specific", - "Session-Timeout", - "Idle-Timeout", - "Termination-Action", - "Called-Station-Id", - "Calling-Station-Id", - "NAS-Identifier", - "Proxy-State", - "Login-LAT-Service", - "Login-LAT-Node", - "Login-LAT-Group", - "Framed-AppleTalk-Link", - "Framed-AppleTalk-Network", - "Framed-AppleTalk-Zone", - "Acct-Status-Type", - "Acct-Delay-Time", - "Acct-Input-Octets", - "Acct-Output-Octets", - "Acct-Session-Id", - "Acct-Authentic", - "Acct-Session-Time", - "Acct-Input-Packets", - "Acct-Output-Packets", - "Acct-Terminate-Cause", - "Acct-Multi-Session-Id", - "Acct-Link-Count", - "Acct-Input-Gigawords", - "Acct-Output-Gigawords", - "Unassigned", - "Event-Timestamp", - "Egress-VLANID", - "Ingress-Filters", - "Egress-VLAN-Name", - "User-Priority-Table", - "CHAP-Challenge", - "NAS-Port-Type", - "Port-Limit", - "Login-LAT-Port", - "Tunnel-Type", - "Tunnel-Medium-Type", - "Tunnel-Client-Endpoint", - "Tunnel-Server-Endpoint", - "Acct-Tunnel-Connection", - "Tunnel-Password", - "ARAP-Password", - "ARAP-Features", - "ARAP-Zone-Access", - "ARAP-Security", - "ARAP-Security-Data", - "Password-Retry", - "Prompt", - "Connect-Info", - "Configuration-Token", - "EAP-Message", - "Message-Authenticator", - "Tunnel-Private-Group-ID", - "Tunnel-Assignment-ID", - "Tunnel-Preference", - "ARAP-Challenge-Response", - "Acct-Interim-Interval", - "Acct-Tunnel-Packets-Lost", - "NAS-Port-Id", - "Framed-Pool", - "CUI", - "Tunnel-Client-Auth-ID", - "Tunnel-Server-Auth-ID", - "NAS-Filter-Rule", - "Unassigned", - "Originating-Line-Info", - "NAS-IPv6-Address", - "Framed-Interface-Id", - "Framed-IPv6-Prefix", - "Login-IPv6-Host", - "Framed-IPv6-Route", - "Framed-IPv6-Pool", - "Error-Cause", - "EAP-Key-Name", - "Digest-Response", - "Digest-Realm", - "Digest-Nonce", - "Digest-Response-Auth", - "Digest-Nextnonce", - "Digest-Method", - "Digest-URI", - "Digest-Qop", - "Digest-Algorithm", - "Digest-Entity-Body-Hash", - "Digest-CNonce", - "Digest-Nonce-Count", - "Digest-Username", - "Digest-Opaque", - "Digest-Auth-Param", - "Digest-AKA-Auts", - "Digest-Domain", - "Digest-Stale", - "Digest-HA1", - "SIP-AOR", - "Delegated-IPv6-Prefix", - "MIP6-Feature-Vector", - "MIP6-Home-Link-Prefix"); - -/** - * Attribute enumerator implementation - */ -typedef struct { - /** implements enumerator interface */ - enumerator_t public; - /** currently pointing attribute */ - rattr_t *next; - /** bytes left */ - int left; -} attribute_enumerator_t; - - -/** - * Implementation of attribute_enumerator_t.enumerate - */ -static bool attribute_enumerate(attribute_enumerator_t *this, - int *type, chunk_t *data) - -{ - if (this->left == 0) - { - return FALSE; - } - if (this->left < sizeof(rattr_t) || - this->left < this->next->length) - { - DBG1(DBG_IKE, "RADIUS message truncated"); - return FALSE; - } - *type = this->next->type; - data->ptr = this->next->value; - data->len = this->next->length - sizeof(rattr_t); - this->left -= this->next->length; - this->next = ((void*)this->next) + this->next->length; - return TRUE; -} - -/** - * Implementation of radius_message_t.create_enumerator - */ -static enumerator_t* create_enumerator(private_radius_message_t *this) -{ - attribute_enumerator_t *e; - - if (ntohs(this->msg->length) < sizeof(rmsg_t) + sizeof(rattr_t)) - { - return enumerator_create_empty(); - } - - e = malloc_thing(attribute_enumerator_t); - e->public.enumerate = (void*)attribute_enumerate; - e->public.destroy = (void*)free; - e->next = (rattr_t*)this->msg->attributes; - e->left = ntohs(this->msg->length) - sizeof(rmsg_t); - return &e->public; -} - -/** - * Implementation of radius_message_t.add - */ -static void add(private_radius_message_t *this, radius_attribute_type_t type, - chunk_t data) -{ - rattr_t *attribute; - - data.len = min(data.len, 253); - this->msg = realloc(this->msg, - ntohs(this->msg->length) + sizeof(rattr_t) + data.len); - attribute = ((void*)this->msg) + ntohs(this->msg->length); - attribute->type = type; - attribute->length = data.len + sizeof(rattr_t); - memcpy(attribute->value, data.ptr, data.len); - this->msg->length = htons(ntohs(this->msg->length) + attribute->length); -} - -/** - * Implementation of radius_message_t.sign - */ -static void sign(private_radius_message_t *this, rng_t *rng, signer_t *signer) -{ - char buf[HASH_SIZE_MD5]; - - /* build Request-Authenticator */ - rng->get_bytes(rng, HASH_SIZE_MD5, this->msg->authenticator); - - /* build Message-Authenticator attribute, using 16 null bytes */ - memset(buf, 0, sizeof(buf)); - add(this, RAT_MESSAGE_AUTHENTICATOR, chunk_create(buf, sizeof(buf))); - signer->get_signature(signer, - chunk_create((u_char*)this->msg, ntohs(this->msg->length)), - ((u_char*)this->msg) + ntohs(this->msg->length) - HASH_SIZE_MD5); -} - -/** - * Implementation of radius_message_t.verify - */ -static bool verify(private_radius_message_t *this, u_int8_t *req_auth, - chunk_t secret, hasher_t *hasher, signer_t *signer) -{ - char buf[HASH_SIZE_MD5], res_auth[HASH_SIZE_MD5]; - enumerator_t *enumerator; - int type; - chunk_t data, msg; - bool has_eap = FALSE, has_auth = FALSE; - - /* replace Response by Request Authenticator for verification */ - memcpy(res_auth, this->msg->authenticator, HASH_SIZE_MD5); - memcpy(this->msg->authenticator, req_auth, HASH_SIZE_MD5); - msg = chunk_create((u_char*)this->msg, ntohs(this->msg->length)); - - /* verify Response-Authenticator */ - hasher->get_hash(hasher, msg, NULL); - hasher->get_hash(hasher, secret, buf); - if (!memeq(buf, res_auth, HASH_SIZE_MD5)) - { - DBG1(DBG_CFG, "RADIUS Response-Authenticator verification failed"); - return FALSE; - } - - /* verify Message-Authenticator attribute */ - enumerator = create_enumerator(this); - while (enumerator->enumerate(enumerator, &type, &data)) - { - if (type == RAT_MESSAGE_AUTHENTICATOR) - { - if (data.len != HASH_SIZE_MD5) - { - DBG1(DBG_CFG, "RADIUS Message-Authenticator invalid length"); - enumerator->destroy(enumerator); - return FALSE; - } - memcpy(buf, data.ptr, data.len); - memset(data.ptr, 0, data.len); - if (signer->verify_signature(signer, msg, - chunk_create(buf, sizeof(buf)))) - { - /* restore Message-Authenticator */ - memcpy(data.ptr, buf, data.len); - has_auth = TRUE; - break; - } - else - { - DBG1(DBG_CFG, "RADIUS Message-Authenticator verification failed"); - enumerator->destroy(enumerator); - return FALSE; - } - } - else if (type == RAT_EAP_MESSAGE) - { - has_eap = TRUE; - } - } - enumerator->destroy(enumerator); - /* restore Response-Authenticator */ - memcpy(this->msg->authenticator, res_auth, HASH_SIZE_MD5); - - if (has_eap && !has_auth) - { /* Message-Authenticator is required if we have an EAP-Message */ - DBG1(DBG_CFG, "RADIUS Message-Authenticator attribute missing"); - return FALSE; - } - return TRUE; -} - -/** - * Implementation of radius_message_t.get_code - */ -static radius_message_code_t get_code(private_radius_message_t *this) -{ - return this->msg->code; -} - -/** - * Implementation of radius_message_t.get_identifier - */ -static u_int8_t get_identifier(private_radius_message_t *this) -{ - return this->msg->identifier; -} - -/** - * Implementation of radius_message_t.set_identifier - */ -static void set_identifier(private_radius_message_t *this, u_int8_t identifier) -{ - this->msg->identifier = identifier; -} - -/** - * Implementation of radius_message_t.get_authenticator - */ -static u_int8_t* get_authenticator(private_radius_message_t *this) -{ - return this->msg->authenticator; -} - - -/** - * Implementation of radius_message_t.get_encoding - */ -static chunk_t get_encoding(private_radius_message_t *this) -{ - return chunk_create((u_char*)this->msg, ntohs(this->msg->length)); -} - -/** - * Implementation of radius_message_t.destroy. - */ -static void destroy(private_radius_message_t *this) -{ - free(this->msg); - free(this); -} - -/** - * Generic constructor - */ -static private_radius_message_t *radius_message_create() -{ - private_radius_message_t *this = malloc_thing(private_radius_message_t); - - this->public.create_enumerator = (enumerator_t*(*)(radius_message_t*))create_enumerator; - this->public.add = (void(*)(radius_message_t*, radius_attribute_type_t,chunk_t))add; - this->public.get_code = (radius_message_code_t(*)(radius_message_t*))get_code; - this->public.get_identifier = (u_int8_t(*)(radius_message_t*))get_identifier; - this->public.set_identifier = (void(*)(radius_message_t*, u_int8_t identifier))set_identifier; - this->public.get_authenticator = (u_int8_t*(*)(radius_message_t*))get_authenticator; - this->public.get_encoding = (chunk_t(*)(radius_message_t*))get_encoding; - this->public.sign = (void(*)(radius_message_t*, rng_t *rng, signer_t *signer))sign; - this->public.verify = (bool(*)(radius_message_t*, u_int8_t *req_auth, chunk_t secret, hasher_t *hasher, signer_t *signer))verify; - this->public.destroy = (void(*)(radius_message_t*))destroy; - - return this; -} - -/** - * See header - */ -radius_message_t *radius_message_create_request() -{ - private_radius_message_t *this = radius_message_create(); - - this->msg = malloc_thing(rmsg_t); - this->msg->code = RMC_ACCESS_REQUEST; - this->msg->identifier = 0; - this->msg->length = htons(sizeof(rmsg_t)); - - return &this->public; -} - -/** - * See header - */ -radius_message_t *radius_message_parse_response(chunk_t data) -{ - private_radius_message_t *this = radius_message_create(); - - this->msg = malloc(data.len); - memcpy(this->msg, data.ptr, data.len); - if (data.len < sizeof(rmsg_t) || - ntohs(this->msg->length) != data.len) - { - DBG1(DBG_IKE, "RADIUS message has invalid length"); - destroy(this); - return NULL; - } - return &this->public; -} - |