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diff --git a/libccnx-common/ccnx/common/validation/ccnxValidation_HmacSha256.h b/libccnx-common/ccnx/common/validation/ccnxValidation_HmacSha256.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file ccnxValidation_HmacSha256.h
+ * @brief <#Brief Description#>
+ *
+ * <#Detailed Description#>
+ *
+ */
+#ifndef CCNx_Common_ccnxValidation_HmacSha256_h
+#define CCNx_Common_ccnxValidation_HmacSha256_h
+
+#include <parc/security/parc_Signer.h>
+#include <parc/security/parc_Verifier.h>
+#include <ccnx/common/internal/ccnx_TlvDictionary.h>
+
+/**
+ * Sets the Validation algorithm to HMAC-SHA256
+ *
+ * Sets the validation algorithm to be HMAC with a SHA-256 digest.  Optionally includes a KeyId
+ *
+ * @param [in] message The message dictionary
+ * @param [in] keyid (Optional) The KEYID to include the the message
+ *
+ * @return true success
+ * @return false failure
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+bool ccnxValidationHmacSha256_Set(CCNxTlvDictionary *message, const PARCBuffer *keyid);
+
+/**
+ * Determines if the validation algorithm is RSA-SHA256
+ *
+ * <#Paragraphs Of Explanation#>
+ *
+ * @param [in] message The message to check
+ *
+ * @return true The validation algorithm in the dictionary is this one
+ * @return false The validaiton algorithm in the dictionary is something else or not present
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+bool ccnxValidationHmacSha256_Test(const CCNxTlvDictionary *message);
+
+/**
+ * Creates a signer using a specified secret key
+ *
+ * <#Paragraphs Of Explanation#>
+ *
+ * @param [in] secretKey The key to use as the authenticator
+ *
+ * @return non-null An allocated signer
+ * @return null An error
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+PARCSigner *ccnxValidationHmacSha256_CreateSigner(PARCBuffer *secretKey);
+
+/**
+ * Creates a verifier to check a CRC32C "signature"
+ *
+ * Once the Verifier is created, you can add more keys using
+ * parcVerifier_AddKey().  If you provide a secretKey in the call, it will
+ * be added to the verifier automatically.
+ *
+ * @param [in] secretKey (Optional) The key to use as the authenticator, or NULL.
+ *
+ * @return non-null An allocated verifier
+ * @return null An error
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+PARCVerifier *ccnxValidationHmacSha256_CreateVerifier(PARCBuffer *secretKey);
+#endif // CCNx_Common_ccnxValidation_HmacSha256_h