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Make the hmac_t interface a generic interface for message authentication codes

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This commit is contained in:
Tobias Brunner
2012-06-25 16:35:06 +02:00
parent 228d096e42
commit c4a3c9672a
11 changed files with 131 additions and 132 deletions
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src/libstrongswan/crypto/hmacs/hmac.h → src/libstrongswan/crypto/mac.h
+14 -15
View File
@@ -16,23 +16,23 @@
*/
/**
* @defgroup hmac hmac
* @defgroup mac mac
* @{ @ingroup crypto
*/
#ifndef HMAC_H_
#define HMAC_H_
#ifndef MAC_H_
#define MAC_H_
typedef struct hmac_t hmac_t;
typedef struct mac_t mac_t;
#include <library.h>
/**
* Generic interface for message authentication using hash functions.
* Generic interface for message authentication codes.
*
* Classes implementing this interface can use the PRF and signer wrappers.
*/
struct hmac_t {
struct mac_t {
/**
* Generate message authentication code.
@@ -45,29 +45,28 @@ struct hmac_t {
* @param data chunk of data to authenticate
* @param out pointer where the generated bytes will be written
*/
void (*get_mac)(hmac_t *this, chunk_t data, u_int8_t *out);
void (*get_mac)(mac_t *this, chunk_t data, u_int8_t *out);
/**
* Get the size of the resulting MAC (i.e. the output size of the
* underlying hash function).
* Get the size of the resulting MAC.
*
* @return block size in bytes
*/
size_t (*get_mac_size)(hmac_t *this);
size_t (*get_mac_size)(mac_t *this);
/**
* Set the key to be used for the HMAC.
* Set the key to be used for the MAC.
*
* Any key length must be accepted.
*
* @param key key to set
*/
void (*set_key) (hmac_t *this, chunk_t key);
void (*set_key) (mac_t *this, chunk_t key);
/**
* Destroys a hmac_t object.
* Destroys a mac_t object.
*/
void (*destroy) (hmac_t *this);
void (*destroy) (mac_t *this);
};
#endif /** HMAC_H_ @}*/
#endif /** MAC_H_ @}*/
src/libstrongswan/crypto/hmacs/hmac_prf.c → src/libstrongswan/crypto/prfs/mac_prf.c
+15 -15
View File
@@ -15,12 +15,12 @@
* for more details.
*/
#include "hmac_prf.h"
#include "mac_prf.h"
typedef struct private_prf_t private_prf_t;
/**
* Private data of a hmac_prf_t object.
* Private data of a mac_prf_t object.
*/
struct private_prf_t {
@@ -30,15 +30,15 @@ struct private_prf_t {
prf_t public;
/**
* HMAC to use
* MAC to use
*/
hmac_t *hmac;
mac_t *mac;
};
METHOD(prf_t, get_bytes, void,
private_prf_t *this, chunk_t seed, u_int8_t *buffer)
{
this->hmac->get_mac(this->hmac, seed, buffer);
this->mac->get_mac(this->mac, seed, buffer);
}
METHOD(prf_t, allocate_bytes, void,
@@ -46,45 +46,45 @@ METHOD(prf_t, allocate_bytes, void,
{
if (!chunk)
{
this->hmac->get_mac(this->hmac, seed, NULL);
this->mac->get_mac(this->mac, seed, NULL);
}
else
{
*chunk = chunk_alloc(this->hmac->get_mac_size(this->hmac));
this->hmac->get_mac(this->hmac, seed, chunk->ptr);
*chunk = chunk_alloc(this->mac->get_mac_size(this->mac));
this->mac->get_mac(this->mac, seed, chunk->ptr);
}
}
METHOD(prf_t, get_block_size, size_t,
private_prf_t *this)
{
return this->hmac->get_mac_size(this->hmac);
return this->mac->get_mac_size(this->mac);
}
METHOD(prf_t, get_key_size, size_t,
private_prf_t *this)
{
/* for HMAC PRFs, IKEv2 uses MAC size as key size */
return this->hmac->get_mac_size(this->hmac);
/* IKEv2 uses MAC size as key size */
return this->mac->get_mac_size(this->mac);
}
METHOD(prf_t, set_key, void,
private_prf_t *this, chunk_t key)
{
this->hmac->set_key(this->hmac, key);
this->mac->set_key(this->mac, key);
}
METHOD(prf_t, destroy, void,
private_prf_t *this)
{
this->hmac->destroy(this->hmac);
this->mac->destroy(this->mac);
free(this);
}
/*
* Described in header.
*/
prf_t *hmac_prf_create(hmac_t *hmac)
prf_t *mac_prf_create(mac_t *mac)
{
private_prf_t *this;
@@ -97,7 +97,7 @@ prf_t *hmac_prf_create(hmac_t *hmac)
.set_key = _set_key,
.destroy = _destroy,
},
.hmac = hmac,
.mac = mac,
);
return &this->public;
src/libstrongswan/crypto/hmacs/hmac_prf.h → src/libstrongswan/crypto/prfs/mac_prf.h
+9 -9
View File
@@ -14,23 +14,23 @@
*/
/**
* @defgroup hmac_prf hmac_prf
* @{ @ingroup hmac
* @defgroup mac_prf mac_prf
* @{ @ingroup crypto
*/
#ifndef HMAC_PRF_H_
#define HMAC_PRF_H_
#ifndef MAC_PRF_H_
#define MAC_PRF_H_
#include <crypto/mac.h>
#include <crypto/prfs/prf.h>
#include <crypto/hmacs/hmac.h>
/**
* Creates an implementation of the prf_t interface using the provided hmac_t
* Creates an implementation of the prf_t interface using the provided mac_t
* implementation. Basically a simple wrapper to map the interface.
*
* @param hmac hmac_t implementation
* @param mac mac_t implementation
* @return prf_t object
*/
prf_t *hmac_prf_create(hmac_t *hmac);
prf_t *mac_prf_create(mac_t *mac);
#endif /** HMAC_PRF_H_ @}*/
#endif /** MAC_PRF_H_ @}*/
src/libstrongswan/crypto/hmacs/hmac_signer.c → src/libstrongswan/crypto/signers/mac_signer.c
+19 -19
View File
@@ -15,12 +15,12 @@
* for more details.
*/
#include "hmac_signer.h"
#include "mac_signer.h"
typedef struct private_signer_t private_signer_t;
/**
* Private data of a hmac_signer_t object.
* Private data of a mac_signer_t object.
*/
struct private_signer_t {
@@ -30,12 +30,12 @@ struct private_signer_t {
signer_t public;
/**
* HMAC to use
* MAC to use
*/
hmac_t *hmac;
mac_t *mac;
/**
* Truncation of HMAC output
* Truncation of MAC output
*/
size_t truncation;
};
@@ -45,13 +45,13 @@ METHOD(signer_t, get_signature, void,
{
if (buffer == NULL)
{
this->hmac->get_mac(this->hmac, data, NULL);
this->mac->get_mac(this->mac, data, NULL);
}
else
{
u_int8_t mac[this->hmac->get_mac_size(this->hmac)];
u_int8_t mac[this->mac->get_mac_size(this->mac)];
this->hmac->get_mac(this->hmac, data, mac);
this->mac->get_mac(this->mac, data, mac);
memcpy(buffer, mac, this->truncation);
}
}
@@ -61,13 +61,13 @@ METHOD(signer_t, allocate_signature, void,
{
if (chunk == NULL)
{
this->hmac->get_mac(this->hmac, data, NULL);
this->mac->get_mac(this->mac, data, NULL);
}
else
{
u_int8_t mac[this->hmac->get_mac_size(this->hmac)];
u_int8_t mac[this->mac->get_mac_size(this->mac)];
this->hmac->get_mac(this->hmac, data, mac);
this->mac->get_mac(this->mac, data, mac);
*chunk = chunk_alloc(this->truncation);
memcpy(chunk->ptr, mac, this->truncation);
@@ -77,20 +77,20 @@ METHOD(signer_t, allocate_signature, void,
METHOD(signer_t, verify_signature, bool,
private_signer_t *this, chunk_t data, chunk_t signature)
{
u_int8_t mac[this->hmac->get_mac_size(this->hmac)];
u_int8_t mac[this->mac->get_mac_size(this->mac)];
if (signature.len != this->truncation)
{
return FALSE;
}
this->hmac->get_mac(this->hmac, data, mac);
this->mac->get_mac(this->mac, data, mac);
return memeq(signature.ptr, mac, this->truncation);
}
METHOD(signer_t, get_key_size, size_t,
private_signer_t *this)
{
return this->hmac->get_mac_size(this->hmac);
return this->mac->get_mac_size(this->mac);
}
METHOD(signer_t, get_block_size, size_t,
@@ -102,20 +102,20 @@ METHOD(signer_t, get_block_size, size_t,
METHOD(signer_t, set_key, void,
private_signer_t *this, chunk_t key)
{
this->hmac->set_key(this->hmac, key);
this->mac->set_key(this->mac, key);
}
METHOD(signer_t, destroy, void,
private_signer_t *this)
{
this->hmac->destroy(this->hmac);
this->mac->destroy(this->mac);
free(this);
}
/*
* Described in header
*/
signer_t *hmac_signer_create(hmac_t *hmac, size_t len)
signer_t *mac_signer_create(mac_t *mac, size_t len)
{
private_signer_t *this;
@@ -129,8 +129,8 @@ signer_t *hmac_signer_create(hmac_t *hmac, size_t len)
.set_key = _set_key,
.destroy = _destroy,
},
.truncation = min(len, hmac->get_mac_size(hmac)),
.hmac = hmac,
.truncation = min(len, mac->get_mac_size(mac)),
.mac = mac,
);
return &this->public;
src/libstrongswan/crypto/hmacs/hmac_signer.h → src/libstrongswan/crypto/signers/mac_signer.h
+12 -12
View File
@@ -14,28 +14,28 @@
*/
/**
* @defgroup hmac_signer hmac_signer
* @{ @ingroup hmac
* @defgroup mac_signer mac_signer
* @{ @ingroup crypto
*/
#ifndef HMAC_SIGNER_H_
#define HMAC_SIGNER_H_
#ifndef MAC_SIGNER_H_
#define MAC_SIGNER_H_
typedef struct hmac_signer_t hmac_signer_t;
typedef struct mac_signer_t mac_signer_t;
#include <crypto/hmacs/hmac.h>
#include <crypto/mac.h>
#include <crypto/signers/signer.h>
/**
* Creates an implementation of the signer_t interface using the provided hmac_t
* Creates an implementation of the signer_t interface using the provided mac_t
* implementation and truncation length.
*
* @note len will be set to hmac_t.get_mac_size() if it is greater than that.
* @note len will be set to mac_t.get_mac_size() if it is greater than that.
*
* @param hmac hmac_t implementation
* @param mac mac_t implementation
* @param len length of resulting signature
* @return hmac_signer_t
* @return mac_signer_t
*/
signer_t *hmac_signer_create(hmac_t *hmac, size_t len);
signer_t *mac_signer_create(mac_t *mac, size_t len);
#endif /** HMAC_SIGNER_H_ @}*/
#endif /** MAC_SIGNER_H_ @}*/