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v2fly/common/crypto/chacha20.go

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package crypto
import (
"crypto/cipher"
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"github.com/v2fly/v2ray-core/v4/common/crypto/internal"
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)
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// NewChaCha20Stream creates a new Chacha20 encryption/descryption stream based on give key and IV.
// Caller must ensure the length of key is 32 bytes, and length of IV is either 8 or 12 bytes.
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func NewChaCha20Stream(key []byte, iv []byte) cipher.Stream {
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return internal.NewChaCha20Stream(key, iv, 20)
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}