mirror of https://github.com/v2ray/v2ray-core
41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
package crypto
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import (
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"crypto/aes"
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"crypto/cipher"
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"v2ray.com/core/common"
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)
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// NewAesDecryptionStream creates a new AES encryption stream based on given key and IV.
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// 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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return NewAesStreamMethod(key, iv, cipher.NewCFBDecrypter)
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}
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// NewAesEncryptionStream creates a new AES description stream based on given key and IV.
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// 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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return NewAesStreamMethod(key, iv, cipher.NewCFBEncrypter)
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}
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func NewAesStreamMethod(key []byte, iv []byte, f func(cipher.Block, []byte) cipher.Stream) cipher.Stream {
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aesBlock, err := aes.NewCipher(key)
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common.Must(err)
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return f(aesBlock, iv)
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}
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// NewAesCTRStream creates a stream cipher based on AES-CTR.
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func NewAesCTRStream(key []byte, iv []byte) cipher.Stream {
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return NewAesStreamMethod(key, iv, cipher.NewCTR)
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}
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// NewAesGcm creates a AEAD cipher based on AES-GCM.
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func NewAesGcm(key []byte) cipher.AEAD {
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block, err := aes.NewCipher(key)
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common.Must(err)
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aead, err := cipher.NewGCM(block)
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common.Must(err)
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return aead
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}
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