diff options
Diffstat (limited to 'security/nss/lib/freebl/alghmac.h')
-rw-r--r-- | security/nss/lib/freebl/alghmac.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/alghmac.h b/security/nss/lib/freebl/alghmac.h new file mode 100644 index 0000000000..0e0d66a344 --- /dev/null +++ b/security/nss/lib/freebl/alghmac.h @@ -0,0 +1,70 @@ +/* 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 _ALGHMAC_H_ +#define _ALGHMAC_H_ + +typedef struct HMACContextStr HMACContext; + +SEC_BEGIN_PROTOS + +/* destroy HMAC context */ +extern void +HMAC_Destroy(HMACContext *cx, PRBool freeit); + +/* create HMAC context + * hash_obj hash object from SECRawHashObjects[] + * secret the secret with which the HMAC is performed. + * secret_len the length of the secret. + * isFIPS true if conforming to FIPS 198. + * + * NULL is returned if an error occurs. + */ +extern HMACContext * +HMAC_Create(const SECHashObject *hash_obj, const unsigned char *secret, + unsigned int secret_len, PRBool isFIPS); + +/* like HMAC_Create, except caller allocates HMACContext. */ +SECStatus +HMAC_Init(HMACContext *cx, const SECHashObject *hash_obj, + const unsigned char *secret, unsigned int secret_len, PRBool isFIPS); + +/* like HMAC_Init, except caller passes in an existing context + * previously used by either HMAC_Create or HMAC_Init. */ +SECStatus +HMAC_ReInit(HMACContext *cx, const SECHashObject *hash_obj, + const unsigned char *secret, unsigned int secret_len, PRBool isFIPS); + +/* reset HMAC for a fresh round */ +extern void +HMAC_Begin(HMACContext *cx); + +/* update HMAC + * cx HMAC Context + * data the data to perform HMAC on + * data_len the length of the data to process + */ +extern void +HMAC_Update(HMACContext *cx, const unsigned char *data, unsigned int data_len); + +/* Finish HMAC -- place the results within result + * cx HMAC context + * result buffer for resulting hmac'd data + * result_len where the resultant hmac length is stored + * max_result_len maximum possible length that can be stored in result + */ +extern SECStatus +HMAC_Finish(HMACContext *cx, unsigned char *result, unsigned int *result_len, + unsigned int max_result_len); + +/* clone a copy of the HMAC state. this is usefult when you would + * need to keep a running hmac but also need to extract portions + * partway through the process. + */ +extern HMACContext * +HMAC_Clone(HMACContext *cx); + +SEC_END_PROTOS + +#endif |