| /* 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 CTR_H |
| #define CTR_H 1 |
| |
| #include "blapii.h" |
| |
| /* This structure is defined in this header because both ctr.c and gcm.c |
| * need it. */ |
| struct CTRContextStr { |
| freeblCipherFunc cipher; |
| void *context; |
| unsigned char counter[MAX_BLOCK_SIZE]; |
| unsigned char buffer[MAX_BLOCK_SIZE]; |
| unsigned char counterFirst[MAX_BLOCK_SIZE]; /* counter overlfow value */ |
| PRBool checkWrap; /*check for counter overflow*/ |
| unsigned long counterBits; |
| unsigned int bufPtr; |
| }; |
| |
| typedef struct CTRContextStr CTRContext; |
| |
| SECStatus CTR_InitContext(CTRContext *ctr, void *context, |
| freeblCipherFunc cipher, const unsigned char *param); |
| |
| /* |
| * The context argument is the inner cipher context to use with cipher. The |
| * CTRContext does not own context. context needs to remain valid for as long |
| * as the CTRContext is valid. |
| * |
| * The cipher argument is a block cipher in the ECB encrypt mode. |
| */ |
| CTRContext *CTR_CreateContext(void *context, freeblCipherFunc cipher, |
| const unsigned char *param); |
| |
| void CTR_DestroyContext(CTRContext *ctr, PRBool freeit); |
| |
| SECStatus CTR_Update(CTRContext *ctr, unsigned char *outbuf, |
| unsigned int *outlen, unsigned int maxout, |
| const unsigned char *inbuf, unsigned int inlen, |
| unsigned int blocksize); |
| |
| #ifdef USE_HW_AES |
| SECStatus CTR_Update_HW_AES(CTRContext *ctr, unsigned char *outbuf, |
| unsigned int *outlen, unsigned int maxout, |
| const unsigned char *inbuf, unsigned int inlen, |
| unsigned int blocksize); |
| #endif |
| |
| #endif |