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This commit is contained in:
Martin Willi
2006-04-05 12:10:50 +00:00
parent 3dbbbf3e16
commit 6862128151
171 changed files with 674 additions and 1355 deletions
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Source/lib/crypto/signers/Makefile.signers
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# Copyright (C) 2005 Jan Hutter, 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.
#
SIGNERS_DIR= $(CRYPTO_DIR)signers/
LIB_OBJS+= $(BUILD_DIR)signer.o
$(BUILD_DIR)signer.o : $(SIGNERS_DIR)signer.c $(SIGNERS_DIR)signer.h
$(CC) $(CFLAGS) -c -o $@ $<
LIB_OBJS+= $(BUILD_DIR)hmac_signer.o
$(BUILD_DIR)hmac_signer.o : $(SIGNERS_DIR)hmac_signer.c $(SIGNERS_DIR)hmac_signer.h
$(CC) $(CFLAGS) -c -o $@ $<
Source/lib/crypto/signers/hmac_signer.c
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/**
* @file hmac_signer.c
*
* @brief Implementation of hmac_signer_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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 "hmac_signer.h"
#include <utils/allocator.h>
#include <crypto/prfs/hmac_prf.h>
/**
* This class represents a hmac signer with 12 byte (96 bit) output.
*/
#define BLOCK_SIZE 12
typedef struct private_hmac_signer_t private_hmac_signer_t;
/**
* Private data structure with signing context.
*/
struct private_hmac_signer_t {
/**
* Public interface of hmac_signer_t.
*/
hmac_signer_t public;
/*
* Assigned hmac function.
*/
prf_t *hmac_prf;
};
/**
* Implementation of signer_t.get_signature.
*/
static void get_signature (private_hmac_signer_t *this, chunk_t data, u_int8_t *buffer)
{
u_int8_t full_mac[this->hmac_prf->get_block_size(this->hmac_prf)];
this->hmac_prf->get_bytes(this->hmac_prf,data,full_mac);
/* copy mac aka signature :-) */
memcpy(buffer,full_mac,BLOCK_SIZE);
}
/**
* Implementation of signer_t.allocate_signature.
*/
static void allocate_signature (private_hmac_signer_t *this, chunk_t data, chunk_t *chunk)
{
chunk_t signature;
u_int8_t full_mac[this->hmac_prf->get_block_size(this->hmac_prf)];
this->hmac_prf->get_bytes(this->hmac_prf,data,full_mac);
signature.ptr = allocator_alloc(BLOCK_SIZE);
signature.len = BLOCK_SIZE;
/* copy signature */
memcpy(signature.ptr,full_mac,BLOCK_SIZE);
*chunk = signature;
}
/**
* Implementation of signer_t.verify_signature.
*/
static bool verify_signature (private_hmac_signer_t *this, chunk_t data, chunk_t signature)
{
u_int8_t full_mac[this->hmac_prf->get_block_size(this->hmac_prf)];
this->hmac_prf->get_bytes(this->hmac_prf,data,full_mac);
if (signature.len != BLOCK_SIZE)
{
return FALSE;
}
/* compare mac aka signature :-) */
if (memcmp(signature.ptr,full_mac,BLOCK_SIZE) == 0)
{
return TRUE;
}
else
{
return FALSE;
}
}
/**
* Implementation of signer_t.get_key_size.
*/
static size_t get_key_size (private_hmac_signer_t *this)
{
/* for HMAC signer, IKEv2 uses block size as key size */
return this->hmac_prf->get_block_size(this->hmac_prf);
}
/**
* Implementation of signer_t.get_block_size.
*/
static size_t get_block_size (private_hmac_signer_t *this)
{
return BLOCK_SIZE;
}
/**
* Implementation of signer_t.set_key.
*/
static void set_key (private_hmac_signer_t *this, chunk_t key)
{
this->hmac_prf->set_key(this->hmac_prf,key);
}
/**
* Implementation of signer_t.destroy.
*/
static status_t destroy(private_hmac_signer_t *this)
{
this->hmac_prf->destroy(this->hmac_prf);
allocator_free(this);
return SUCCESS;
}
/*
* Described in header
*/
hmac_signer_t *hmac_signer_create(hash_algorithm_t hash_algoritm)
{
private_hmac_signer_t *this = allocator_alloc_thing(private_hmac_signer_t);
this->hmac_prf = (prf_t *) hmac_prf_create(hash_algoritm);
if (this->hmac_prf == NULL)
{
/* algorithm not supported */
allocator_free(this);
return NULL;
}
/* interface functions */
this->public.signer_interface.get_signature = (void (*) (signer_t*, chunk_t, u_int8_t*))get_signature;
this->public.signer_interface.allocate_signature = (void (*) (signer_t*, chunk_t, chunk_t*))allocate_signature;
this->public.signer_interface.verify_signature = (bool (*) (signer_t*, chunk_t, chunk_t))verify_signature;
this->public.signer_interface.get_key_size = (size_t (*) (signer_t*))get_key_size;
this->public.signer_interface.get_block_size = (size_t (*) (signer_t*))get_block_size;
this->public.signer_interface.set_key = (void (*) (signer_t*,chunk_t))set_key;
this->public.signer_interface.destroy = (void (*) (signer_t*))destroy;
return &(this->public);
}
Source/lib/crypto/signers/hmac_signer.h
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/**
* @file hmac_signer.h
*
* @brief Interface of hmac_signer_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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.
*/
#ifndef HMAC_SIGNER_H_
#define HMAC_SIGNER_H_
#include <crypto/signers/signer.h>
#include <crypto/hashers/hasher.h>
typedef struct hmac_signer_t hmac_signer_t;
/**
* @brief Implementation of signer_t interface using the
* HMAC algorithm in combination with either MD5 or SHA1.
*
* @ingroup signers
*/
struct hmac_signer_t {
/**
* generic signer_t interface for this signer
*/
signer_t signer_interface;
};
/**
* @brief Creates a new hmac_signer_t.
*
* @param hash_algoritm Hash algorithm to use with signer
* @return
* - hmac_signer_t
* - NULL if hash algorithm not supported
*
* @ingroup signers
*/
hmac_signer_t *hmac_signer_create(hash_algorithm_t hash_algoritm);
#endif /*HMAC_SIGNER_H_*/
Source/lib/crypto/signers/signer.c
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/**
* @file signer.c
*
* @brief Implementation of generic signer_t constructor.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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 "signer.h"
#include <crypto/signers/hmac_signer.h>
/**
* String mappings for integrity_algorithm_t.
*/
mapping_t integrity_algorithm_m[] = {
{AUTH_UNDEFINED, "AUTH_UNDEFINED"},
{AUTH_HMAC_MD5_96, "AUTH_HMAC_MD5_96"},
{AUTH_HMAC_SHA1_96, "AUTH_HMAC_SHA1_96"},
{AUTH_DES_MAC, "AUTH_DES_MAC"},
{AUTH_KPDK_MD5, "AUTH_KPDK_MD5"},
{AUTH_AES_XCBC_96, "AUTH_AES_XCBC_96"},
{MAPPING_END, NULL}
};
/*
* Described in header.
*/
signer_t *signer_create(integrity_algorithm_t integrity_algorithm)
{
switch(integrity_algorithm)
{
case AUTH_HMAC_SHA1_96:
{
return ((signer_t *) hmac_signer_create(HASH_SHA1));
}
case AUTH_HMAC_MD5_96:
{
return ((signer_t *) hmac_signer_create(HASH_MD5));
}
default:
return NULL;
}
}
Source/lib/crypto/signers/signer.h
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/**
* @file signer.h
*
* @brief Interface for signer_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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.
*/
#ifndef SIGNER_H_
#define SIGNER_H_
#include <types.h>
#include <definitions.h>
typedef enum integrity_algorithm_t integrity_algorithm_t;
/**
* @brief Integrity algorithm, as in IKEv2 RFC 3.3.2.
*
* Currently only the following algorithms are implemented and therefore supported:
* - AUTH_HMAC_MD5_96
* - AUTH_HMAC_SHA1_96
*
* @ingroup signers
*/
enum integrity_algorithm_t {
AUTH_UNDEFINED = 1024,
/**
* Implemented in class hmac_signer_t.
*/
AUTH_HMAC_MD5_96 = 1,
/**
* Implemented in class hmac_signer_t.
*/
AUTH_HMAC_SHA1_96 = 2,
AUTH_DES_MAC = 3,
AUTH_KPDK_MD5 = 4,
AUTH_AES_XCBC_96 = 5
};
/**
* String mappings for integrity_algorithm_t.
*/
extern mapping_t integrity_algorithm_m[];
typedef struct signer_t signer_t;
/**
* @brief Generig interface for a symmetric signature algorithm.
*
* @b Constructors:
* - signer_create()
* - hmac_signer_create()
*
* @todo Implement more integrity algorithms
*
* @ingroup signers
*/
struct signer_t {
/**
* @brief Generate a signature.
*
* @param this calling object
* @param data a chunk containing the data to sign
* @param[out] buffer pointer where the signature will be written
*/
void (*get_signature) (signer_t *this, chunk_t data, u_int8_t *buffer);
/**
* @brief Generate a signature and allocate space for it.
*
* @param this calling object
* @param data a chunk containing the data to sign
* @param[out] chunk chunk which will hold the allocated signature
*/
void (*allocate_signature) (signer_t *this, chunk_t data, chunk_t *chunk);
/**
* @brief Verify a signature.
*
* @param this calling object
* @param data a chunk containing the data to verify
* @param signature a chunk containing the signature
* @return TRUE, if signature is valid, FALSE otherwise
*/
bool (*verify_signature) (signer_t *this, chunk_t data, chunk_t signature);
/**
* @brief Get the block size of this signature algorithm.
*
* @param this calling object
* @return block size in bytes
*/
size_t (*get_block_size) (signer_t *this);
/**
* @brief Get the key size of the signature algorithm.
*
* @param this calling object
* @return key size in bytes
*/
size_t (*get_key_size) (signer_t *this);
/**
* @brief Set the key for this object.
*
* @param this calling object
* @param key key to set
*/
void (*set_key) (signer_t *this, chunk_t key);
/**
* @brief Destroys a signer_t object.
*
* @param this calling object
*/
void (*destroy) (signer_t *this);
};
/**
* @brief Creates a new signer_t object.
*
* @param integrity_algorithm Algorithm to use for signing and verifying.
* @return
* - signer_t object
* - NULL if signer not supported
*
* @ingroup signers
*/
signer_t *signer_create(integrity_algorithm_t integrity_algorithm);
#endif /*SIGNER_H_*/