54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package dns_api
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import (
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"encoding/base32"
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"encoding/base64"
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"git.gammaspectra.live/givna.me/dns-api/ed25519"
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"golang.org/x/crypto/sha3"
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"strings"
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)
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var base32Encoding = base32.NewEncoding(strings.ToLower("ABCDEFGHIJKLMNOPQRSTUVWXYZ234567")).WithPadding(base32.NoPadding)
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const onionV3Version = byte(0x3)
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const onionChecksumData = ".onion checksum"
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func PublicKeyToOnionV3(publicKey ed25519.PublicKey) string {
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checksumBuf := make([]byte, 0, ed25519.PublicKeySize+1+len(onionChecksumData))
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buf := make([]byte, 0, ed25519.PublicKeySize+2+1)
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checksumBuf = append(checksumBuf, onionChecksumData...)
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checksumBuf = append(checksumBuf, publicKey...)
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checksumBuf = append(checksumBuf, onionV3Version)
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h := sha3.New256()
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h.Write(checksumBuf)
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checksum := h.Sum([]byte{})[:2]
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buf = append(buf, publicKey...)
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buf = append(buf, checksum...)
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buf = append(buf, onionV3Version)
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return base32Encoding.EncodeToString(buf)
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}
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const torPrivateKeyPrefix = "== ed25519v1-secret: type0 ==\x00\x00\x00"
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const torPublicKeyPrefix = "== ed25519v1-public: type0 ==\x00\x00\x00"
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func DecodeTorPrivateKey(key string) ed25519.PrivateKey {
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priv, err := base64.RawStdEncoding.DecodeString(key)
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if err != nil {
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return nil
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}
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return ed25519.NewKeyFromRaw(priv[32:])
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}
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func DecodePrivateKey(buf string) ed25519.PrivateKey {
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priv, err := base64.RawStdEncoding.DecodeString(buf)
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if err != nil {
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return nil
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}
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return ed25519.NewKeyFromRaw(priv)
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}
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