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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _CMAC_H_
#define _CMAC_H_
typedef struct CMACContextStr CMACContext;
SEC_BEGIN_PROTOS
/* Enum for identifying the underlying block cipher we're using internally. */
typedef enum {
CMAC_AES = 0
} CMACCipher;
/* Initialize an existing CMACContext struct. */
SECStatus CMAC_Init(CMACContext *ctx, CMACCipher type,
const unsigned char *key, unsigned int key_len);
/* Allocate and initialize a new CMAC context with the specified cipher and
* key. */
CMACContext *CMAC_Create(CMACCipher type, const unsigned char *key,
unsigned int key_len);
/* Called automatically by CMAC_*{Create,Init}(...). Only useful for restarting
* an already-started CMAC instance. */
SECStatus CMAC_Begin(CMACContext *ctx);
/* Add the specified bytes into the CMAC state. */
SECStatus CMAC_Update(CMACContext *ctx, const unsigned char *data,
unsigned int data_len);
/* Finalize the CMAC state and return the result. */
SECStatus CMAC_Finish(CMACContext *ctx, unsigned char *result,
unsigned int *result_len,
unsigned int max_result_len);
/* Note: CMAC_Clone isn't implemented here because AES doesn't expose a
* context-cloning operation. */
/* Destroy a CMAC context, optionally freeing it. */
void CMAC_Destroy(CMACContext *ctx, PRBool free_it);
SEC_END_PROTOS
#endif