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- added compution of all needed keys and also creation of needed

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transform objects
This commit is contained in:
Jan Hutter
2005-11-28 15:20:51 +00:00
parent 61068e9152
commit b9d9f18874
13 changed files with 390 additions and 158 deletions
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Source/charon/sa/ike_sa.c
+190 -11
View File
@@ -32,6 +32,7 @@
#include <utils/randomizer.h>
#include <transforms/diffie_hellman.h>
#include <transforms/prf_plus.h>
#include <transforms/crypters/crypter.h>
#include <encoding/payloads/sa_payload.h>
#include <encoding/payloads/nonce_payload.h>
#include <encoding/payloads/ke_payload.h>
@@ -348,6 +349,9 @@ static ike_sa_id_t* get_id(private_ike_sa_t *this)
return this->ike_sa_id;
}
/**
* @brief implements function protected_ike_sa_t.compute_secrets
*/
static status_t compute_secrets (private_ike_sa_t *this,chunk_t dh_shared_secret,chunk_t initiator_nonce, chunk_t responder_nonce)
{
chunk_t concatenated_nonces;
@@ -357,8 +361,8 @@ static status_t compute_secrets (private_ike_sa_t *this,chunk_t dh_shared_secret
u_int64_t initiator_spi;
u_int64_t responder_spi;
prf_plus_t *prf_plus;
chunk_t secrets_raw;
/*
* TODO check length for specific prf's
*/
@@ -398,6 +402,7 @@ static status_t compute_secrets (private_ike_sa_t *this,chunk_t dh_shared_secret
return FAILED;
}
/* first is initiator */
memcpy(prf_plus_seed.ptr,initiator_nonce.ptr,initiator_nonce.len);
/* second is responder */
@@ -409,8 +414,8 @@ static status_t compute_secrets (private_ike_sa_t *this,chunk_t dh_shared_secret
responder_spi = this->ike_sa_id->get_responder_spi(this->ike_sa_id);
memcpy(prf_plus_seed.ptr + initiator_nonce.len + responder_nonce.len + 8,&responder_spi,8);
this->logger->log_chunk(this->logger, PRIVATE, "Keyseed", &skeyseed);
this->logger->log_chunk(this->logger, PRIVATE, "PRF+ Seed", &prf_plus_seed);
this->logger->log_chunk(this->logger, PRIVATE | MORE, "Keyseed", &skeyseed);
this->logger->log_chunk(this->logger, PRIVATE | MORE, "PRF+ Seed", &prf_plus_seed);
this->logger->log(this->logger, CONTROL | MOST, "Set new key of prf object");
status = this->prf->set_key(this->prf,skeyseed);
@@ -431,11 +436,85 @@ static status_t compute_secrets (private_ike_sa_t *this,chunk_t dh_shared_secret
return FAILED;
}
prf_plus->allocate_bytes(prf_plus,100,&secrets_raw);
status = prf_plus->allocate_bytes(prf_plus,this->prf->get_block_size(this->prf),&(this->secrets.d_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_d");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_d secret", &(this->secrets.d_key));
status = prf_plus->allocate_bytes(prf_plus,this->crypter_initiator->get_block_size(this->crypter_initiator),&(this->secrets.ei_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_ei");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_ei secret", &(this->secrets.ei_key));
status = this->crypter_initiator->set_key(this->crypter_initiator,this->secrets.ei_key);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not set encryption key initiator crypter");
return status;
}
status = prf_plus->allocate_bytes(prf_plus,this->crypter_responder->get_block_size(this->crypter_responder),&(this->secrets.er_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_er");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_er secret", &(this->secrets.er_key));
status = this->crypter_responder->set_key(this->crypter_responder,this->secrets.er_key);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not set encryption key responder crypter");
return status;
}
status = prf_plus->allocate_bytes(prf_plus,this->signer_initiator->get_block_size(this->signer_initiator),&(this->secrets.ai_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_ai");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_ai secret", &(this->secrets.ai_key));
status = this->signer_initiator->set_key(this->signer_initiator,this->secrets.ai_key);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not set key for initiator signer");
return status;
}
status = prf_plus->allocate_bytes(prf_plus,this->signer_responder->get_block_size(this->signer_responder),&(this->secrets.ar_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_ar");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_ar secret", &(this->secrets.ar_key));
status = this->signer_responder->set_key(this->signer_responder,this->secrets.ar_key);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not set key for responder signer");
return status;
}
status = prf_plus->allocate_bytes(prf_plus,this->crypter_responder->get_block_size(this->crypter_responder),&(this->secrets.pi_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_pi");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_pi secret", &(this->secrets.pi_key));
this->logger->log_chunk(this->logger, PRIVATE, "Secrets", &secrets_raw);
allocator_free_chunk(&secrets_raw);
status = prf_plus->allocate_bytes(prf_plus,this->crypter_responder->get_block_size(this->crypter_responder),&(this->secrets.pr_key));
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not allocate bytes from prf+ for Sk_pr");
return status;
}
this->logger->log_chunk(this->logger, PRIVATE, "Sk_pr secret", &(this->secrets.pr_key));
prf_plus->destroy(prf_plus);
@@ -496,6 +575,7 @@ status_t create_delete_job (private_ike_sa_t *this)
*/
static void set_new_state (private_ike_sa_t *this, state_t *state)
{
this->logger->log(this->logger, ERROR, "Change current state %s to %s",mapping_find(ike_sa_state_m,this->current_state->get_state(this->current_state)),mapping_find(ike_sa_state_m,state->get_state(state)));
this->current_state = state;
}
@@ -530,6 +610,7 @@ static void set_my_host (private_ike_sa_t *this, host_t *my_host)
{
if (this->me.host != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing my host object");
this->me.host->destroy(this->me.host);
}
this->me.host = my_host;
@@ -542,6 +623,7 @@ static void set_other_host (private_ike_sa_t *this, host_t *other_host)
{
if (this->other.host != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing other host object");
this->other.host->destroy(this->other.host);
}
this->other.host = other_host;
@@ -550,13 +632,110 @@ static void set_other_host (private_ike_sa_t *this, host_t *other_host)
/**
* Implementation of protected_ike_sa_t.set_prf.
*/
static void set_prf (private_ike_sa_t *this,prf_t *prf)
static status_t create_transforms_from_proposal (private_ike_sa_t *this,proposal_substructure_t *proposal)
{
status_t status;
u_int16_t encryption_algorithm;
u_int16_t encryption_algorithm_key_length;
u_int16_t integrity_algorithm;
u_int16_t integrity_algorithm_key_length;
u_int16_t pseudo_random_function;
u_int16_t pseudo_random_function_key_length;
this ->logger->log(this->logger, CONTROL|MORE, "Going to create transform objects for proposal");
this ->logger->log(this->logger, CONTROL|MOST, "Get encryption transform type");
status = proposal->get_info_for_transform_type(proposal,ENCRYPTION_ALGORITHM,&(encryption_algorithm),&(encryption_algorithm_key_length));
if (status != SUCCESS)
{
this ->logger->log(this->logger, ERROR|MORE, "Could not get encryption transform type");
return status;
}
this ->logger->log(this->logger, CONTROL|MORE, "Encryption algorithm: %s with keylength %d",mapping_find(encryption_algorithm_m,encryption_algorithm),encryption_algorithm_key_length);
this ->logger->log(this->logger, CONTROL|MOST, "Get integrity transform type");
status = proposal->get_info_for_transform_type(proposal,INTEGRITY_ALGORITHM,&(integrity_algorithm),&(integrity_algorithm_key_length));
if (status != SUCCESS)
{
this ->logger->log(this->logger, ERROR|MORE, "Could not get integrity transform type");
return status;
}
this ->logger->log(this->logger, CONTROL|MORE, "integrity algorithm: %s with keylength %d",mapping_find(integrity_algorithm_m,integrity_algorithm),integrity_algorithm_key_length);
this ->logger->log(this->logger, CONTROL|MOST, "Get prf transform type");
status = proposal->get_info_for_transform_type(proposal,PSEUDO_RANDOM_FUNCTION,&(pseudo_random_function),&(pseudo_random_function_key_length));
if (status != SUCCESS)
{
this ->logger->log(this->logger, ERROR|MORE, "Could not prf transform type");
return status;
}
this ->logger->log(this->logger, CONTROL|MORE, "prf: %s with keylength %d",mapping_find(pseudo_random_function_m,pseudo_random_function),pseudo_random_function_key_length);
if (this->prf != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing prf_t object");
this->prf->destroy(this->prf);
}
this->prf = prf;
this->prf = prf_create(pseudo_random_function);
if (this->prf == NULL)
{
this ->logger->log(this->logger, ERROR|MORE, "prf does not seem to be supported!");
return FAILED;
}
if (this->crypter_initiator != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing initiator crypter_t object");
this->crypter_initiator->destroy(this->crypter_initiator);
}
this->crypter_initiator = crypter_create(encryption_algorithm,encryption_algorithm_key_length);
if (this->crypter_initiator == NULL)
{
this ->logger->log(this->logger, ERROR|MORE, "encryption algorithm does not seem to be supported!");
return FAILED;
}
if (this->crypter_responder != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing responder crypter_t object");
this->crypter_responder->destroy(this->crypter_responder);
}
this->crypter_responder = crypter_create(encryption_algorithm,encryption_algorithm_key_length);
if (this->crypter_responder == NULL)
{
this ->logger->log(this->logger, ERROR|MORE, "encryption algorithm does not seem to be supported!");
return FAILED;
}
if (this->signer_initiator != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing initiator signer_t object");
this->signer_initiator->destroy(this->signer_initiator);
}
this->signer_initiator = signer_create(integrity_algorithm);
if (this->signer_initiator == NULL)
{
this ->logger->log(this->logger, ERROR|MORE, "integrity algorithm does not seem to be supported!");
return FAILED;
}
if (this->signer_responder != NULL)
{
this ->logger->log(this->logger, CONTROL|MOST, "Destroy existing responder signer_t object");
this->signer_responder->destroy(this->signer_responder);
}
this->signer_responder = signer_create(integrity_algorithm);
if (this->signer_responder == NULL)
{
this ->logger->log(this->logger, ERROR|MORE, "integrity algorithm does not seem to be supported!");
return FAILED;
}
return SUCCESS;
}
/**
@@ -775,7 +954,7 @@ ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id)
this->protected.get_randomizer = (randomizer_t *(*) (protected_ike_sa_t *)) get_randomizer;
this->protected.set_last_requested_message = (status_t (*) (protected_ike_sa_t *,message_t *)) set_last_requested_message;
this->protected.set_last_responded_message = (status_t (*) (protected_ike_sa_t *,message_t *)) set_last_responded_message;
this->protected.set_prf = (void (*) (protected_ike_sa_t *,prf_t *)) set_prf;
this->protected.create_transforms_from_proposal = (status_t (*) (protected_ike_sa_t *,proposal_substructure_t *)) create_transforms_from_proposal;
this->protected.set_new_state = (void (*) (protected_ike_sa_t *,state_t *)) set_new_state;
/* private functions */
Source/charon/sa/ike_sa.h
+7 -4
View File
@@ -26,6 +26,7 @@
#include <types.h>
#include <encoding/message.h>
#include <encoding/payloads/proposal_substructure.h>
#include <sa/ike_sa_id.h>
#include <utils/logger.h>
#include <utils/randomizer.h>
@@ -171,14 +172,16 @@ struct protected_ike_sa_t {
void (*set_other_host) (protected_ike_sa_t *this,host_t *other_host);
/**
* Sets the internal stored prf_t object.
* Creates all needed transform objects for given ike_sa_t using
* the informations stored in a proposal_substructure_t object
*
* Allready existing object gets destroyed. object gets not cloned!
* Allready existing objects get destroyed.
*
* @param this calling object
* @param prf pointer to the new prf_t object
* @param proposal proposal used to get informations for transform
* objects (algorithms, key lengths, etc.)
*/
void (*set_prf) (protected_ike_sa_t *this,prf_t *prf);
status_t (*create_transforms_from_proposal) (protected_ike_sa_t *this,proposal_substructure_t *proposal);
/**
* Sets the last requested message.
Source/charon/sa/states/ike_sa_init_requested.c
+35 -18
View File
@@ -136,12 +136,10 @@ static status_t process_message(private_ike_sa_init_requested_t *this, message_t
{
case SECURITY_ASSOCIATION:
{
sa_payload_t *sa_payload = (sa_payload_t*)payload;
iterator_t *suggested_proposals;
encryption_algorithm_t encryption_algorithm = ENCR_UNDEFINED;
pseudo_random_function_t pseudo_random_function = PRF_UNDEFINED;
integrity_algorithm_t integrity_algorithm = AUTH_UNDEFINED;
prf_t *prf;
sa_payload_t *sa_payload = (sa_payload_t*)payload;
iterator_t *suggested_proposals;
proposal_substructure_t *suggested_proposal;
bool valid;
/* get the list of suggested proposals */
@@ -153,27 +151,46 @@ static status_t process_message(private_ike_sa_init_requested_t *this, message_t
return status;
}
/* now let the configuration-manager return the transforms for the given proposal*/
this->logger->log(this->logger, CONTROL | MOST, "Get transforms for suggested proposal");
status = global_configuration_manager->get_transforms_for_host_and_proposals(global_configuration_manager,
this->ike_sa->get_other_host(this->ike_sa), suggested_proposals, &encryption_algorithm,&pseudo_random_function,&integrity_algorithm);
/* now let the configuration-manager check the selected proposals*/
this->logger->log(this->logger, CONTROL | MOST, "Check suggested proposals");
status = global_configuration_manager->check_selected_proposals_for_host(global_configuration_manager,
this->ike_sa->get_other_host(this->ike_sa), suggested_proposals,&valid);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Suggested proposals not supported!");
this->logger->log(this->logger, ERROR | MORE, "Could not check suggested proposals!");
suggested_proposals->destroy(suggested_proposals);
payloads->destroy(payloads);
return status;
}
suggested_proposals->destroy(suggested_proposals);
prf = prf_create(pseudo_random_function);
if (prf == NULL)
if (!valid)
{
this->logger->log(this->logger, ERROR | MORE, "PRF type not supported");
this->logger->log(this->logger, ERROR | MORE, "Suggested proposals not accepted!");
payloads->destroy(payloads);
return FAILED;
return status;
}
/* let the ike_sa create their own transforms from proposal informations */
suggested_proposals->reset(suggested_proposals);
/* TODO check for true*/
suggested_proposals->has_next(suggested_proposals);
status = suggested_proposals->current(suggested_proposals,(void **)&suggested_proposal);
suggested_proposals->destroy(suggested_proposals);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Could not get first proposal");
payloads->destroy(payloads);
return status;
}
status = this->ike_sa->create_transforms_from_proposal(this->ike_sa,suggested_proposal);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Transform objects could not be created from selected proposal");
payloads->destroy(payloads);
return status;
}
this->ike_sa->set_prf(this->ike_sa,prf);
/* ok, we have what we need for sa_payload */
Source/charon/sa/states/responder_init.c
+12 -17
View File
@@ -223,10 +223,7 @@ static status_t process_message(private_responder_init_t *this, message_t *messa
{
sa_payload_t *sa_payload = (sa_payload_t*)payload;
iterator_t *suggested_proposals, *accepted_proposals;
encryption_algorithm_t encryption_algorithm = ENCR_UNDEFINED;
pseudo_random_function_t pseudo_random_function = PRF_UNDEFINED;
integrity_algorithm_t integrity_algorithm = AUTH_UNDEFINED;
prf_t *prf;
proposal_substructure_t *accepted_proposal;
status = this->proposals->create_iterator(this->proposals, &accepted_proposals, FALSE);
if (status != SUCCESS)
@@ -260,12 +257,13 @@ static status_t process_message(private_responder_init_t *this, message_t *messa
/* iterators are not needed anymore */
suggested_proposals->destroy(suggested_proposals);
/* now let the configuration-manager return the transforms for the given proposal*/
this->logger->log(this->logger, CONTROL | MOST, "Get transforms for accepted proposal");
status = global_configuration_manager->get_transforms_for_host_and_proposals(global_configuration_manager,
this->ike_sa->get_other_host(this->ike_sa), accepted_proposals, &encryption_algorithm,&pseudo_random_function,&integrity_algorithm);
/* let the ike_sa create their own transforms from proposal informations */
accepted_proposals->reset(accepted_proposals);
/* TODO check for true*/
accepted_proposals->has_next(accepted_proposals);
status = accepted_proposals->current(accepted_proposals,(void **)&accepted_proposal);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "Accepted proposals not supported?!");
@@ -273,16 +271,15 @@ static status_t process_message(private_responder_init_t *this, message_t *messa
payloads->destroy(payloads);
return status;
}
accepted_proposals->destroy(accepted_proposals);
prf = prf_create(pseudo_random_function);
if (prf == NULL)
status = this->ike_sa->create_transforms_from_proposal(this->ike_sa,accepted_proposal);
accepted_proposals->destroy(accepted_proposals);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR | MORE, "PRF type not supported");
this->logger->log(this->logger, ERROR | MORE, "Transform objects could not be created from selected proposal");
payloads->destroy(payloads);
return FAILED;
return status;
}
this->ike_sa->set_prf(this->ike_sa,prf);
this->logger->log(this->logger, CONTROL | MORE, "SA Payload processed");
/* ok, we have what we need for sa_payload (proposals are stored in this->proposals)*/
@@ -397,8 +394,6 @@ static status_t process_message(private_responder_init_t *this, message_t *messa
this->logger->log(this->logger, ERROR | MORE, "Secrets could not be computed!");
return status;
}
/* set up the reply */
status = this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, FALSE, &response);