mirror of https://github.com/XTLS/Xray-core
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package all
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import (
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"golang.org/x/crypto/curve25519"
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)
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func Curve25519Genkey(StdEncoding bool, input_base64 string) {
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var output string
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var err error
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var privateKey, publicKey []byte
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var encoding *base64.Encoding
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if *input_stdEncoding || StdEncoding {
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encoding = base64.StdEncoding
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} else {
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encoding = base64.RawURLEncoding
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}
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if len(input_base64) > 0 {
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privateKey, err = encoding.DecodeString(input_base64)
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if err != nil {
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output = err.Error()
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goto out
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}
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if len(privateKey) != curve25519.ScalarSize {
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output = "Invalid length of private key."
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goto out
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}
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}
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if privateKey == nil {
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privateKey = make([]byte, curve25519.ScalarSize)
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if _, err = rand.Read(privateKey); err != nil {
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output = err.Error()
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goto out
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}
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}
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// Modify random bytes using algorithm described at:
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// https://cr.yp.to/ecdh.html.
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privateKey[0] &= 248
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privateKey[31] &= 127
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privateKey[31] |= 64
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if publicKey, err = curve25519.X25519(privateKey, curve25519.Basepoint); err != nil {
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output = err.Error()
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goto out
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}
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output = fmt.Sprintf("Private key: %v\nPublic key: %v",
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encoding.EncodeToString(privateKey),
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encoding.EncodeToString(publicKey))
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out:
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fmt.Println(output)
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}
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