github.com/zntrio/harp/v2@v2.0.9/pkg/sdk/value/encryption/aead/transformer.go (about)

     1  // Licensed to Elasticsearch B.V. under one or more contributor
     2  // license agreements. See the NOTICE file distributed with
     3  // this work for additional information regarding copyright
     4  // ownership. Elasticsearch B.V. licenses this file to you under
     5  // the Apache License, Version 2.0 (the "License"); you may
     6  // not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing,
    12  // software distributed under the License is distributed on an
    13  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    14  // KIND, either express or implied.  See the License for the
    15  // specific language governing permissions and limitations
    16  // under the License.
    17  
    18  package aead
    19  
    20  import (
    21  	"context"
    22  	"crypto/cipher"
    23  )
    24  
    25  // -----------------------------------------------------------------------------
    26  
    27  type aeadTransformer struct {
    28  	aead cipher.AEAD
    29  }
    30  
    31  func (t *aeadTransformer) To(ctx context.Context, input []byte) ([]byte, error) {
    32  	// Encrypt
    33  	out, err := encrypt(ctx, input, t.aead)
    34  	if err != nil {
    35  		return nil, err
    36  	}
    37  
    38  	// Return result
    39  	return out, nil
    40  }
    41  
    42  func (t *aeadTransformer) From(ctx context.Context, input []byte) ([]byte, error) {
    43  	// Decrypt
    44  	out, err := decrypt(ctx, input, t.aead)
    45  	if err != nil {
    46  		return nil, err
    47  	}
    48  
    49  	// No error
    50  	return out, nil
    51  }