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Diffstat (limited to 'security/nss/lib/softoken/alghmac.h')
| -rw-r--r-- | security/nss/lib/softoken/alghmac.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/security/nss/lib/softoken/alghmac.h b/security/nss/lib/softoken/alghmac.h new file mode 100644 index 000000000..10d598267 --- /dev/null +++ b/security/nss/lib/softoken/alghmac.h @@ -0,0 +1,90 @@ +/* + * The contents of this file are subject to the Mozilla Public + * License Version 1.1 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS + * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + * implied. See the License for the specific language governing + * rights and limitations under the License. + * + * The Original Code is the Netscape security libraries. + * + * The Initial Developer of the Original Code is Netscape + * Communications Corporation. Portions created by Netscape are + * Copyright (C) 1994-2000 Netscape Communications Corporation. All + * Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the + * terms of the GNU General Public License Version 2 or later (the + * "GPL"), in which case the provisions of the GPL are applicable + * instead of those above. If you wish to allow use of your + * version of this file only under the terms of the GPL and not to + * allow others to use your version of this file under the MPL, + * indicate your decision by deleting the provisions above and + * replace them with the notice and other provisions required by + * the GPL. If you do not delete the provisions above, a recipient + * may use your version of this file under either the MPL or the + * GPL. + */ + +#ifndef _ALGHMAC_H_ +#define _ALGHMAC_H_ + +#include "secoid.h" + +typedef struct HMACContextStr HMACContext; + +SEC_BEGIN_PROTOS + +/* destroy HMAC context */ +extern void +HMAC_Destroy(HMACContext *cx); + +/* create HMAC context + * hash_alg the algorithm with which the HMAC is performed. This + * should be, SEC_OID_MD5, SEC_OID_SHA1, or SEC_OID_MD2. + * secret the secret with which the HMAC is performed. + * secret_len the length of the secret, limited to at most 64 bytes. + * + * NULL is returned if an error occurs or the secret is > 64 bytes. + */ +extern HMACContext * +HMAC_Create(SECOidTag hash_alg, const unsigned char *secret, + unsigned int secret_len); + +/* 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 |