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Support signing of RADIUS accounting messages

This commit is contained in:
Martin Willi 2012-01-30 19:13:20 +01:00
parent 370de553f8
commit a69aff5f17
3 changed files with 26 additions and 10 deletions
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29
src/libcharon/plugins/eap_radius/radius_message.c
View File

@ -272,19 +272,32 @@ METHOD(radius_message_t, add, void,
}
METHOD(radius_message_t, sign, void,
private_radius_message_t *this, rng_t *rng, signer_t *signer)
private_radius_message_t *this, rng_t *rng, signer_t *signer,
hasher_t *hasher, chunk_t secret)
{
char buf[HASH_SIZE_MD5];
if (this->msg->code == RMC_ACCOUNTING_REQUEST)
{
chunk_t msg;
/* build Request-Authenticator */
rng->get_bytes(rng, HASH_SIZE_MD5, this->msg->authenticator);
memset(this->msg->authenticator, 0, sizeof(this->msg->authenticator));
msg = chunk_create((u_char*)this->msg, ntohs(this->msg->length));
hasher->get_hash(hasher, msg, NULL);
hasher->get_hash(hasher, secret, this->msg->authenticator);
}
else
{
char buf[HASH_SIZE_MD5];
/* 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,
/* 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);
}
}
METHOD(radius_message_t, verify, bool,

5
src/libcharon/plugins/eap_radius/radius_message.h
View File

@ -238,8 +238,11 @@ struct radius_message_t {
*
* @param rng RNG to create Request-Authenticator
* @param signer HMAC-MD5 signer with secret set
* @param hasher MD5 hasher
* @param secret shared RADIUS secret
*/
void (*sign)(radius_message_t *this, rng_t *rng, signer_t *signer);
void (*sign)(radius_message_t *this, rng_t *rng, signer_t *signer,
hasher_t *hasher, chunk_t secret);
/**
* Verify the integrity of a received RADIUS response.

2
src/libcharon/plugins/eap_radius/radius_socket.c
View File

@ -132,7 +132,7 @@ METHOD(radius_socket_t, request, radius_message_t*,
/* set Message Identifier */
request->set_identifier(request, this->identifier++);
/* sign the request */
request->sign(request, this->rng, this->signer);
request->sign(request, this->rng, this->signer, this->hasher, this->secret);
if (!check_connection(this))
{