32 lines
698 B
Go
32 lines
698 B
Go
package encrypt
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import (
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"bytes"
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"crypto/aes"
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"crypto/cipher"
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)
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// PKCS5 填充
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func pkcs5Padding(src []byte, blockSize int) []byte {
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padding := blockSize - len(src)%blockSize
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padText := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(src, padText...)
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}
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func AesEncryptCBCPKCS5(plainText, key, 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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// PKCS5 填充（与 PKCS7 相同，只是 block size 为 8）
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paddedText := pkcs5Padding(plainText, block.BlockSize())
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cipherText := make([]byte, len(paddedText))
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mode := cipher.NewCBCEncrypter(block, iv)
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mode.CryptBlocks(cipherText, paddedText)
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return cipherText, nil
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}
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