michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef CTR_H
michael@0: #define CTR_H 1
michael@0: 
michael@0: #include "blapii.h"
michael@0: 
michael@0: /* This structure is defined in this header because both ctr.c and gcm.c
michael@0:  * need it. */
michael@0: struct CTRContextStr {
michael@0:    freeblCipherFunc cipher;
michael@0:    void *context;
michael@0:    unsigned char counter[MAX_BLOCK_SIZE];
michael@0:    unsigned char buffer[MAX_BLOCK_SIZE];
michael@0:    unsigned long counterBits;
michael@0:    unsigned int bufPtr;
michael@0: };
michael@0: 
michael@0: typedef struct CTRContextStr CTRContext;
michael@0: 
michael@0: SECStatus CTR_InitContext(CTRContext *ctr, void *context,
michael@0: 			freeblCipherFunc cipher, const unsigned char *param,
michael@0: 			unsigned int blocksize);
michael@0: 
michael@0: /*
michael@0:  * The context argument is the inner cipher context to use with cipher. The
michael@0:  * CTRContext does not own context. context needs to remain valid for as long
michael@0:  * as the CTRContext is valid.
michael@0:  *
michael@0:  * The cipher argument is a block cipher in the ECB encrypt mode.
michael@0:  */
michael@0: CTRContext * CTR_CreateContext(void *context, freeblCipherFunc cipher,
michael@0: 			const unsigned char *param, unsigned int blocksize);
michael@0: 
michael@0: void CTR_DestroyContext(CTRContext *ctr, PRBool freeit);
michael@0: 
michael@0: SECStatus CTR_Update(CTRContext *ctr, unsigned char *outbuf,
michael@0: 			unsigned int *outlen, unsigned int maxout,
michael@0: 			const unsigned char *inbuf, unsigned int inlen,
michael@0: 			unsigned int blocksize);
michael@0: 
michael@0: #ifdef USE_HW_AES
michael@0: SECStatus CTR_Update_HW_AES(CTRContext *ctr, unsigned char *outbuf,
michael@0: 			unsigned int *outlen, unsigned int maxout,
michael@0: 			const unsigned char *inbuf, unsigned int inlen,
michael@0: 			unsigned int blocksize);
michael@0: #endif
michael@0: 
michael@0: #endif