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