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/* gc.h --- Header file for implementation agnostic crypto wrapper API.
* Copyright (C) 2002, 2003, 2004 Simon Josefsson
*
* This file is part of GC.
*
* GC is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* GC 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 Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GC; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#ifndef GC_H
#define GC_H
/* Get size_t. */
#include <stddef.h>
#define GC_MD5_LEN 16
#define GC_SHA1_LEN 20
enum Gc_rc
{
GC_OK = 0,
GC_MALLOC_ERROR,
GC_INIT_ERROR,
GC_RANDOM_ERROR,
GC_INVALID_CIPHER,
GC_INVALID_HASH,
GC_PKCS5_INVALID_ITERATION_COUNT,
GC_PKCS5_INVALID_DERIVED_KEY_LENGTH,
GC_PKCS5_DERIVED_KEY_TOO_LONG
};
typedef enum Gc_rc Gc_rc;
enum Gc_hash
{
GC_MD5,
GC_SHA1,
GC_RMD160
};
typedef enum Gc_hash Gc_hash;
enum Gc_cipher
{
GC_AES128,
GC_AES256,
GC_3DES,
GC_DES,
GC_ARCFOUR128,
GC_ARCFOUR40,
GC_ARCTWO40
};
typedef enum Gc_cipher Gc_cipher;
enum Gc_cipher_mode
{
GC_CBC,
GC_STREAM
};
typedef enum Gc_cipher_mode Gc_cipher_mode;
enum Gc_hash_mode
{
GC_HMAC = 1
};
typedef enum Gc_hash_mode Gc_hash_mode;
typedef void *gc_hash;
typedef void *gc_cipher;
extern int gc_init (void);
extern void gc_done (void);
/* Randomness. */
extern int gc_nonce (char *data, size_t datalen);
extern int gc_pseudo_random (char *data, size_t datalen);
extern int gc_random (char *data, size_t datalen);
/* Memory allocation (avoid). */
typedef void *(*gc_malloc_t) (size_t n);
typedef int (*gc_secure_check_t) (const void *);
typedef void *(*gc_realloc_t) (void *p, size_t n);
typedef void (*gc_free_t) (void *);
extern void gc_set_allocators (gc_malloc_t func_malloc,
gc_malloc_t secure_malloc,
gc_secure_check_t secure_check,
gc_realloc_t func_realloc,
gc_free_t func_free);
/* Ciphers. */
extern int gc_cipher_open (int cipher, int mode, gc_cipher * outhandle);
extern int gc_cipher_setkey (gc_cipher handle, size_t keylen,
const char *key);
extern int gc_cipher_setiv (gc_cipher handle, size_t ivlen, const char *iv);
extern int gc_cipher_encrypt_inline (gc_cipher handle, size_t len,
char *data);
extern int gc_cipher_decrypt_inline (gc_cipher handle, size_t len,
char *data);
extern int gc_cipher_close (gc_cipher handle);
/* Hashes. */
extern int gc_hash_open (int hash, int mode, gc_hash * outhandle);
extern int gc_hash_clone (gc_hash handle, gc_hash * outhandle);
extern size_t gc_hash_digest_length (int hash);
extern void gc_hash_hmac_setkey (gc_hash handle, size_t len, const char *key);
extern void gc_hash_write (gc_hash handle, size_t len, const char *data);
extern const char *gc_hash_read (gc_hash handle);
extern void gc_hash_close (gc_hash handle);
/* One-call interface. */
extern int gc_hash_buffer (int hash, const char *in, size_t inlen, char *out);
extern int gc_md5 (const char *in, size_t inlen, char out[GC_MD5_LEN]);
extern int gc_hmac_md5 (const char *key, size_t keylen,
const char *in, size_t inlen,
char outhash[GC_MD5_LEN]);
extern int gc_hmac_sha1 (const char *key, size_t keylen,
const char *in, size_t inlen,
char outhash[GC_SHA1_LEN]);
/* PKCS5 KDF. */
extern int gc_pkcs5_pbkdf2_sha1 (const char *P, size_t Plen,
const char *S, size_t Slen,
unsigned int c, unsigned int dkLen,
char *DK);
#endif /* GC_H */
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