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40 lines
1.2 KiB
40 lines
1.2 KiB
package crypto |
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import ( |
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"crypto/aes" |
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"crypto/cipher" |
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"github.com/xtls/xray-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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