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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
#ifndef YCIPHER_H
#define YCIPHER_H
/* block cipher interface */
typedef struct
{
krb5_key key;
} CIPHER_CTX;
/* We need to choose a cipher. To do this, choose an enc_provider.
* Be sure to update the block size and key size constants below;
* they are here because static data structures are sized based on
* them so they must be known at compile time./ Thus we cannot
* call the enc_provider function to get the info.
*/
#define yarrow_enc_provider krb5int_enc_aes256
#define yarrow_enc_type ENCTYPE_AES256_CTS_HMAC_SHA1_96
#define CIPHER_BLOCK_SIZE 16
#define CIPHER_KEY_SIZE 32
#if defined( YARROW_NO_MATHLIB )
/* see macros at end for functions evaluated */
#define POW_CIPHER_KEY_SIZE 115792089237316195423570985008687907853269984665640564039457584007913129639936.0
#define POW_CIPHER_BLOCK_SIZE 340282366920938463463374607431768211456.0
#endif
int krb5int_yarrow_cipher_init (CIPHER_CTX *ctx, unsigned const char *key);
int krb5int_yarrow_cipher_encrypt_block
(CIPHER_CTX *ctx, const unsigned char *in, unsigned char *out);
void krb5int_yarrow_cipher_final (CIPHER_CTX *ctx);
#if !defined( YARROW_NO_MATHLIB )
#define POW_CIPHER_KEY_SIZE pow(2.0, CIPHER_KEY_SIZE * 8 / 3.0)
#define POW_CIPHER_BLOCK_SIZE pow(2.0, CIPHER_BLOCK_SIZE * 8)
#endif
#endif /* YCIPHER_H */
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