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/*
* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/aes.h>
#include <openssl/modes.h>
typedef struct prov_aes_cipher_st PROV_AES_CIPHER;
typedef struct prov_aes_key_st {
union {
double align;
AES_KEY ks;
} ks;
block128_f block;
union {
cbc128_f cbc;
ctr128_f ctr;
} stream;
/* The cipher functions we are going to use */
const PROV_AES_CIPHER *ciph;
/* The mode that we are using */
int mode;
/* Set to 1 if we are encrypting or 0 otherwise */
int enc;
unsigned char iv[AES_BLOCK_SIZE];
/*
* num contains the number of bytes of |iv| which are valid for modes that
* manage partial blocks themselves.
*/
size_t num;
/* Buffer of partial blocks processed via update calls */
unsigned char buf[AES_BLOCK_SIZE];
/* Number of bytes in buf */
size_t bufsz;
uint64_t flags;
size_t keylen;
/* Whether padding should be used or not */
unsigned int pad : 1;
} PROV_AES_KEY;
struct prov_aes_cipher_st {
int (*init)(PROV_AES_KEY *dat, const uint8_t *key, size_t keylen);
int (*cipher)(PROV_AES_KEY *dat, uint8_t *out, const uint8_t *in,
size_t inl);
};
const PROV_AES_CIPHER *PROV_AES_CIPHER_ecb(void);
const PROV_AES_CIPHER *PROV_AES_CIPHER_cbc(void);
const PROV_AES_CIPHER *PROV_AES_CIPHER_ofb(void);
const PROV_AES_CIPHER *PROV_AES_CIPHER_cfb(void);
const PROV_AES_CIPHER *PROV_AES_CIPHER_cfb1(void);
const PROV_AES_CIPHER *PROV_AES_CIPHER_cfb8(void);
const PROV_AES_CIPHER *PROV_AES_CIPHER_ctr(void);
size_t fillblock(unsigned char *buf, size_t *buflen, size_t blocksize,
const unsigned char **in, size_t *inlen);
int trailingdata(unsigned char *buf, size_t *buflen, size_t blocksize,
const unsigned char **in, size_t *inlen);
void padblock(unsigned char *buf, size_t *buflen, size_t blocksize);
int unpadblock(unsigned char *buf, size_t *buflen, size_t blocksize);
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