v2ray-core/common/crypto/aes.go

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package crypto
import (
"crypto/aes"
"crypto/cipher"
)
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// NewAesDecryptionStream creates a new AES encryption stream based on given key and IV.
// Caller must ensure the length of key and IV is either 16, 24 or 32 bytes.
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func NewAesDecryptionStream(key []byte, iv []byte) cipher.Stream {
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aesBlock, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
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return cipher.NewCFBDecrypter(aesBlock, iv)
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}
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// NewAesEncryptionStream creates a new AES description stream based on given key and IV.
// Caller must ensure the length of key and IV is either 16, 24 or 32 bytes.
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func NewAesEncryptionStream(key []byte, iv []byte) cipher.Stream {
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aesBlock, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
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return cipher.NewCFBEncrypter(aesBlock, iv)
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}