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Tink is a small cryptographic library that provides a safe, simple, agile and fast way to accomplish some common cryptographic tasks.

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// Copyright 2023 Google LLC
//
// 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.
//
////////////////////////////////////////////////////////////////////////////////

package com.google.crypto.tink.mac;

import static com.google.crypto.tink.internal.TinkBugException.exceptionIsBug;

/**
 * Pre-defined {@link Parameter} objects for {@link com.google.crypto.tink.Mac}.
 *
 * 

Note: if you want to keep dependencies small, consider inlining the constants here. */ public final class PredefinedMacParameters { /** * A {@link Parameters} object for generating new instances of {@link HmacKey} with the following * parameters: * *

    *
  • Key size: 32 bytes *
  • Tag size: 16 bytes *
  • Hash function: SHA256 *
  • OutputPrefixType: TINK *
*/ public static final HmacParameters HMAC_SHA256_128BITTAG = exceptionIsBug( () -> HmacParameters.builder() .setKeySizeBytes(32) .setTagSizeBytes(16) .setVariant(HmacParameters.Variant.TINK) .setHashType(HmacParameters.HashType.SHA256) .build()); /** * A {@link Parameters} object for generating new instances of {@link HmacKey} with the following * parameters: * *
    *
  • Key size: 32 bytes *
  • Tag size: 32 bytes *
  • Hash function: SHA256 *
  • OutputPrefixType: TINK *
*/ public static final HmacParameters HMAC_SHA256_256BITTAG = exceptionIsBug( () -> HmacParameters.builder() .setKeySizeBytes(32) .setTagSizeBytes(32) .setVariant(HmacParameters.Variant.TINK) .setHashType(HmacParameters.HashType.SHA256) .build()); /** * A {@link Parameters} object for generating new instances of {@link HmacKey} with the following * parameters: * *
    *
  • Key size: 64 bytes *
  • Tag size: 32 bytes *
  • Hash function: SHA512 *
  • OutputPrefixType: TINK *
*/ public static final HmacParameters HMAC_SHA512_256BITTAG = exceptionIsBug( () -> HmacParameters.builder() .setKeySizeBytes(64) .setTagSizeBytes(32) .setVariant(HmacParameters.Variant.TINK) .setHashType(HmacParameters.HashType.SHA512) .build()); /** * A {@link Parameters} object for generating new instances of {@link HmacKey} with the following * parameters: * *
    *
  • Key size: 64 bytes *
  • Tag size: 64 bytes *
  • Hash function: SHA512 *
  • OutputPrefixType: TINK *
*/ public static final HmacParameters HMAC_SHA512_512BITTAG = exceptionIsBug( () -> HmacParameters.builder() .setKeySizeBytes(64) .setTagSizeBytes(64) .setVariant(HmacParameters.Variant.TINK) .setHashType(HmacParameters.HashType.SHA512) .build()); /** * A {@link Parameters} object for generating new instances of {@link CmacKey} with the following * parameters: * *
    *
  • Key size: 32 bytes *
  • Tag size: 16 bytes *
  • OutputPrefixType: TINK *
*/ public static final AesCmacParameters AES_CMAC = exceptionIsBug( () -> AesCmacParameters.builder() .setKeySizeBytes(32) .setTagSizeBytes(16) .setVariant(AesCmacParameters.Variant.TINK) .build()); private PredefinedMacParameters() {} }




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