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- preshared secrets are now retrieved over configuration_manager

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This commit is contained in:
Jan Hutter
2005-12-03 16:02:06 +00:00
parent 8d68033e5c
commit aebb38a093
10 changed files with 229 additions and 67 deletions
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Source/charon/sa/authenticator.c
+86 -54
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@@ -23,6 +23,17 @@
#include "authenticator.h"
#include <utils/allocator.h>
#include <daemon.h>
/**
* Key pad for the AUTH method SHARED_KEY_MESSAGE_INTEGRITY_CODE.
*/
#define IKE_V2_KEY_PAD "Key Pad for IKEv2"
/**
* Length of key pad in bytes.
*/
#define IKE_V2_KEY_PAD_LEN 17
typedef struct private_authenticator_t private_authenticator_t;
@@ -37,9 +48,14 @@ struct private_authenticator_t {
authenticator_t public;
/**
* IKE_SA.
* Assigned IKE_SA. Needed to get prf function.
*/
protected_ike_sa_t *ike_sa;
/**
* PRF function. Taken from the IKE_SA.
*/
prf_t *prf;
/**
* A logger for.
@@ -51,45 +67,49 @@ struct private_authenticator_t {
/**
* TODO
*/
chunk_t (*allocate_octets) (private_authenticator_t *this,chunk_t last_message, chunk_t other_nonce,id_payload_t *my_id);
chunk_t (*allocate_octets) (private_authenticator_t *this,chunk_t last_message, chunk_t other_nonce,id_payload_t *my_id, bool initiator);
chunk_t (*allocate_auth_data_with_preshared_secret) (private_authenticator_t *this,chunk_t octets,chunk_t preshared_secret);
chunk_t (*allocate_auth_data_with_preshared_secret) (private_authenticator_t *this,chunk_t last_message, chunk_t nonce,id_payload_t *id_payload, bool initiator,chunk_t preshared_secret);
};
/**
* Implementation of authenticator_t.private_authenticator_t.
*/
static chunk_t allocate_octets(private_authenticator_t *this,chunk_t last_message, chunk_t other_nonce,id_payload_t *my_id)
static chunk_t allocate_octets(private_authenticator_t *this,chunk_t last_message, chunk_t other_nonce,id_payload_t *my_id, bool initiator)
{
chunk_t id_chunk = my_id->get_data(my_id);
u_int8_t id_with_header[4 + id_chunk.len];
chunk_t id_with_header_chunk;
chunk_t octets;
chunk_t id_with_header_chunk = {ptr:id_with_header, len: sizeof(id_with_header) };
u_int8_t *current_pos;
prf_t *prf;
chunk_t octets;
id_with_header[0] = my_id->get_id_type(my_id);
/* TODO
* Reserved bytes are not in any case zero
*/
id_with_header[1] = 0x00;
id_with_header[2] = 0x00;
id_with_header[3] = 0x00;
memcpy(id_with_header + 4,id_chunk.ptr,id_chunk.len);
id_with_header_chunk.ptr = id_with_header;
id_with_header_chunk.len = sizeof(id_with_header);
prf = this->ike_sa->get_prf(this->ike_sa);
prf->set_key(prf,this->ike_sa->get_key_pr(this->ike_sa));
if (initiator)
{
this->prf->set_key(this->prf,this->ike_sa->get_key_pi(this->ike_sa));
}
else
{
this->prf->set_key(this->prf,this->ike_sa->get_key_pr(this->ike_sa));
}
/* 4 bytes are id type and reserved fields of id payload */
octets.len = last_message.len + other_nonce.len + prf->get_block_size(prf);
octets.len = last_message.len + other_nonce.len + this->prf->get_block_size(this->prf);
octets.ptr = allocator_alloc(octets.len);
current_pos = octets.ptr;
memcpy(current_pos,last_message.ptr,last_message.len);
current_pos += last_message.len;
memcpy(current_pos,other_nonce.ptr,other_nonce.len);
current_pos += other_nonce.len;
prf->get_bytes(prf,id_with_header_chunk,current_pos);
this->prf->get_bytes(this->prf,id_with_header_chunk,current_pos);
this->logger->log_chunk(this->logger,RAW | MOST, "Octets (Mesage + Nonce + prf(Sk_px,Idx)",&octets);
return octets;
@@ -98,46 +118,53 @@ static chunk_t allocate_octets(private_authenticator_t *this,chunk_t last_messag
/**
* Implementation of authenticator_t.allocate_auth_data_with_preshared_secret.
*/
static chunk_t allocate_auth_data_with_preshared_secret (private_authenticator_t *this,chunk_t octets,chunk_t preshared_secret)
static chunk_t allocate_auth_data_with_preshared_secret (private_authenticator_t *this,chunk_t last_message, chunk_t nonce,id_payload_t *id_payload, bool initiator,chunk_t preshared_secret)
{
prf_t *prf = this->ike_sa->get_prf(this->ike_sa);
chunk_t auth_data;
chunk_t key_pad;
chunk_t key;
chunk_t key_pad = {ptr: IKE_V2_KEY_PAD, len:IKE_V2_KEY_PAD_LEN};
u_int8_t key_buffer[this->prf->get_block_size(this->prf)];
chunk_t key = {ptr: key_buffer, len: sizeof(key_buffer)};
chunk_t auth_data;
chunk_t octets = this->allocate_octets(this,last_message,nonce,id_payload,initiator);
key_pad.ptr = "Key Pad for IKEv2";
key_pad.len = strlen(key_pad.ptr);
/*
* AUTH = prf(prf(Shared Secret,"Key Pad for IKEv2"), <msg octets>)
*/
this->prf->set_key(this->prf,preshared_secret);
this->prf->get_bytes(this->prf,key_pad,key_buffer);
this->prf->set_key(this->prf,key);
this->prf->allocate_bytes(this->prf,octets,&auth_data);
allocator_free_chunk(&octets);
this->logger->log_chunk(this->logger,RAW | MOST, "Authenticated data",&auth_data);
prf->set_key(prf,preshared_secret);
prf->allocate_bytes(prf,key_pad,&key);
prf->set_key(prf,key);
allocator_free_chunk(&key);
prf->allocate_bytes(prf,octets,&auth_data);
this->logger->log_chunk(this->logger,RAW | MORE, "Authenticated data",&auth_data);
return auth_data;
}
/**
* Implementation of authenticator_t.private_authenticator_t.
*/
static status_t verify_auth_data (private_authenticator_t *this,auth_payload_t *auth_payload, chunk_t last_received_packet,chunk_t my_nonce,id_payload_t *other_id_payload,bool *verified)
static status_t verify_auth_data (private_authenticator_t *this,auth_payload_t *auth_payload, chunk_t last_received_packet,chunk_t my_nonce,id_payload_t *other_id_payload,bool initiator,bool *verified)
{
switch(auth_payload->get_auth_method(auth_payload))
{
case SHARED_KEY_MESSAGE_INTEGRITY_CODE:
{
chunk_t preshared_secret;
identification_t *other_id =other_id_payload->get_identification(other_id_payload);
chunk_t auth_data = auth_payload->get_data(auth_payload);
chunk_t preshared_secret;
status_t status;
status = charon->configuration_manager->get_shared_secret(charon->configuration_manager,other_id,&preshared_secret);
other_id->destroy(other_id);
if (status != SUCCESS)
{
return status;
}
preshared_secret.ptr = "secret";
preshared_secret.len = strlen(preshared_secret.ptr);
chunk_t octets = this->allocate_octets(this,last_received_packet,my_nonce,other_id_payload);
chunk_t my_auth_data = this->allocate_auth_data_with_preshared_secret(this,octets,preshared_secret);
allocator_free_chunk(&octets);
chunk_t my_auth_data = this->allocate_auth_data_with_preshared_secret(this,last_received_packet,my_nonce,other_id_payload,initiator,preshared_secret);
if (auth_data.len != my_auth_data.len)
{
@@ -166,38 +193,42 @@ static status_t verify_auth_data (private_authenticator_t *this,auth_payload_t *
/**
* Implementation of authenticator_t.compute_auth_data.
*/
static status_t compute_auth_data (private_authenticator_t *this,auth_payload_t **auth_payload, chunk_t last_sent_packet,chunk_t other_nonce,id_payload_t *my_id_payload)
static status_t compute_auth_data (private_authenticator_t *this,auth_payload_t **auth_payload, chunk_t last_sent_packet,chunk_t other_nonce,id_payload_t *my_id_payload,bool initiator)
{
sa_config_t *sa_config = this->ike_sa->get_sa_config(this->ike_sa);
/* switch(auth_method)
switch(sa_config->get_auth_method(sa_config))
{
case SHARED_KEY_MESSAGE_INTEGRITY_CODE:
{*/
{
identification_t *my_id =my_id_payload->get_identification(my_id_payload);
chunk_t preshared_secret;
status_t status;
preshared_secret.ptr = "secret";
preshared_secret.len = strlen(preshared_secret.ptr);
chunk_t octets = this->allocate_octets(this,last_sent_packet,other_nonce,my_id_payload);
chunk_t auth_data = this->allocate_auth_data_with_preshared_secret(this,octets,preshared_secret);
allocator_free_chunk(&octets);
status = charon->configuration_manager->get_shared_secret(charon->configuration_manager,my_id,&preshared_secret);
my_id->destroy(my_id);
if (status != SUCCESS)
{
return status;
}
chunk_t auth_data = this->allocate_auth_data_with_preshared_secret(this,last_sent_packet,other_nonce,my_id_payload,initiator,preshared_secret);
*auth_payload = auth_payload_create();
(*auth_payload)->set_auth_method((*auth_payload),SHARED_KEY_MESSAGE_INTEGRITY_CODE);
(*auth_payload)->set_data((*auth_payload),auth_data);
allocator_free_chunk(&auth_data);
allocator_free_chunk(&octets);
return SUCCESS;
/* }
}
default:
{
return NOT_SUPPORTED;
}
}*/
}
}
/**
@@ -217,8 +248,8 @@ authenticator_t *authenticator_create(protected_ike_sa_t *ike_sa)
/* Public functions */
this->public.destroy = (void(*)(authenticator_t*))destroy;
this->public.verify_auth_data = (status_t (*) (authenticator_t *,auth_payload_t *, chunk_t ,chunk_t ,id_payload_t *,bool *)) verify_auth_data;
this->public.compute_auth_data = (status_t (*) (authenticator_t *,auth_payload_t **, chunk_t ,chunk_t ,id_payload_t *)) compute_auth_data;
this->public.verify_auth_data = (status_t (*) (authenticator_t *,auth_payload_t *, chunk_t ,chunk_t ,id_payload_t *,bool,bool *)) verify_auth_data;
this->public.compute_auth_data = (status_t (*) (authenticator_t *,auth_payload_t **, chunk_t ,chunk_t ,id_payload_t *,bool)) compute_auth_data;
/* private functions */
this->allocate_octets = allocate_octets;
@@ -226,6 +257,7 @@ authenticator_t *authenticator_create(protected_ike_sa_t *ike_sa)
/* private data */
this->ike_sa = ike_sa;
this->prf = this->ike_sa->get_prf(this->ike_sa);
this->logger = this->ike_sa->get_logger(this->ike_sa);
return &(this->public);