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// Copyright 2021, Chef. All rights reserved.
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// https://github.com/q191201771/naza
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//
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// Use of this source code is governed by a MIT-style license
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// that can be found in the License file.
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//
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// Author: Chef (191201771@qq.com)
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package crypto
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import (
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"crypto/aes"
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"crypto/cipher"
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)
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// TODO(chef): package crypto和std重复，重命名加上naza前缀
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var CommonIv = []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f}
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// @param key 16字节 -> AES128
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// 24字节 -> AES192
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// 32字节 -> AES256
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func EncryptAesWithCbc(in []byte, key []byte, iv []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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encrypter := cipher.NewCBCEncrypter(block, iv)
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out := make([]byte, len(in))
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copy(out, in)
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encrypter.CryptBlocks(out, out)
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return out, nil
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}
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func DecryptAesWithCbc(in []byte, key []byte, iv []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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decrypter := cipher.NewCBCDecrypter(block, iv)
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out := make([]byte, len(in))
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copy(out, in)
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decrypter.CryptBlocks(out, out)
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return out, nil
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}
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