The Tor Browser: security/nss/lib/freebl/alghmac.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef _ALGHMAC_H_

     6 #define _ALGHMAC_H_

     8 typedef struct HMACContextStr HMACContext;

    10 SEC_BEGIN_PROTOS

    12 /* destroy HMAC context */

    13 extern void

    14 HMAC_Destroy(HMACContext *cx, PRBool freeit);

    16 /* create HMAC context

    17  *  hash_obj    hash object from SECRawHashObjects[]

    18  *  secret	the secret with which the HMAC is performed.

    19  *  secret_len	the length of the secret.

    20  *  isFIPS	true if conforming to FIPS 198.

    21  *

    22  * NULL is returned if an error occurs.

    23  */

    24 extern HMACContext *

    25 HMAC_Create(const SECHashObject *hash_obj, const unsigned char *secret,

    26 	    unsigned int secret_len, PRBool isFIPS);

    28 /* like HMAC_Create, except caller allocates HMACContext. */

    29 SECStatus

    30 HMAC_Init(HMACContext *cx, const SECHashObject *hash_obj,

    31 	  const unsigned char *secret, unsigned int secret_len, PRBool isFIPS);

    33 /* reset HMAC for a fresh round */

    34 extern void

    35 HMAC_Begin(HMACContext *cx);

    37 /* update HMAC

    38  *  cx		HMAC Context

    39  *  data	the data to perform HMAC on

    40  *  data_len	the length of the data to process

    41  */

    42 extern void

    43 HMAC_Update(HMACContext *cx, const unsigned char *data, unsigned int data_len);

    45 /* Finish HMAC -- place the results within result

    46  *  cx		HMAC context

    47  *  result	buffer for resulting hmac'd data

    48  *  result_len	where the resultant hmac length is stored

    49  *  max_result_len  maximum possible length that can be stored in result

    50  */

    51 extern SECStatus

    52 HMAC_Finish(HMACContext *cx, unsigned char *result, unsigned int *result_len,

    53 	    unsigned int max_result_len);

    55 /* clone a copy of the HMAC state.  this is usefult when you would

    56  * need to keep a running hmac but also need to extract portions

    57  * partway through the process.

    58  */

    59 extern HMACContext *

    60 HMAC_Clone(HMACContext *cx);

    62 SEC_END_PROTOS

    64 #endif

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