74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
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package openssl
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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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// AesECBEncrypt
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func AesECBEncrypt(src, key []byte, padding string) ([]byte, error) {
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block, err := AesNewCipher(key)
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if err != nil {
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return nil, err
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}
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return ECBEncrypt(block, src, padding)
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}
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// AesECBDecrypt
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func AesECBDecrypt(src, key []byte, padding string) ([]byte, error) {
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block, err := AesNewCipher(key)
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if err != nil {
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return nil, err
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}
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return ECBDecrypt(block, src, padding)
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}
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// AesCBCEncrypt
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func AesCBCEncrypt(src, key, iv []byte, padding string) ([]byte, error) {
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block, err := AesNewCipher(key)
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if err != nil {
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return nil, err
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}
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return CBCEncrypt(block, src, iv, padding)
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}
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// AesCBCDecrypt
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func AesCBCDecrypt(src, key, iv []byte, padding string) ([]byte, error) {
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block, err := AesNewCipher(key)
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if err != nil {
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return nil, err
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}
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return CBCDecrypt(block, src, iv, padding)
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}
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// AesNewCipher creates and returns a new AES cipher.Block.
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// it will automatically pad the length of the key.
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func AesNewCipher(key []byte) (cipher.Block, error) {
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return aes.NewCipher(aesKeyPending(key))
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}
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// aesKeyPending The length of the key can be 16/24/32 characters (128/192/256 bits)
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func aesKeyPending(key []byte) []byte {
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k := len(key)
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count := 0
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switch true {
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case k <= 16:
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count = 16 - k
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case k <= 24:
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count = 24 - k
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case k <= 32:
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count = 32 - k
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default:
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return key[:32]
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}
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if count == 0 {
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return key
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}
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return append(key, bytes.Repeat([]byte{0}, count)...)
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}
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