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feat: add sign lightning network algorithm
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package goutils | ||
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| import "fmt" | ||
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| func Todo(message string, args ...interface{}) error { | ||
| return fmt.Errorf(message, args...) | ||
| } | ||
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| func Errf(message string, args ...interface{}) error { | ||
| return fmt.Errorf(message, args...) | ||
| } | ||
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| func NotImplementYet() error { | ||
| return Todo("not implemented yet") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // Package ln is a package that implement a signature proposed in the | ||
| // lightning network protocol, but not yet specified. | ||
| package ln | ||
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| import ( | ||
| "encoding/base32" | ||
| "encoding/hex" | ||
| "github.com/LNOpenMetrics/lnmetrics.utils/goutils" | ||
| "github.com/LNOpenMetrics/lnmetrics.utils/hash/sha256" | ||
| "github.com/btcsuite/btcd/btcec/v2/ecdsa" | ||
| ) | ||
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| // LNSigner is a struct that implement th Signer interface | ||
| type LNSigner struct { | ||
| encoder *base32.Encoding | ||
| signedMsgPrefix string | ||
| } | ||
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| func NewLNSigner() *LNSigner { | ||
| return &LNSigner{ | ||
| // Copied from https://github.com/ElementsProject/lightning/blob/master/lightningd/signmessage.c#L11 | ||
| encoder: base32.NewEncoding("ybndrfg8ejkmcpqxot1uwisza345h769"), | ||
| signedMsgPrefix: "Lightning Signed Message:", | ||
| } | ||
| } | ||
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| // SignMsg sign the message by following the lightning network rules, but it is not implemented | ||
| // because required to import the keys to sign the message. | ||
| func (self *LNSigner) SignMsg(msg *string) (*string, error) { | ||
| return nil, goutils.NotImplementYet() | ||
| } | ||
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| // VerifyMsg sign the message with the lightning network logics implemented in the most popular implementation | ||
| func (self *LNSigner) VerifyMsg(key *string, signature *string, msg *string) (bool, error) { | ||
| u8sing, err := self.encoder.DecodeString(*signature) | ||
| if err != nil { | ||
| return false, nil | ||
| } | ||
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| // https://github.com/ElementsProject/lightning/blob/master/lightningd/signmessage.c#L177 | ||
| if len(u8sing) != 65 { | ||
| return false, goutils.Errf("zbase is too is wrong size %d, need to be exactly 65", len(u8sing)) | ||
| } | ||
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| // The signature is over the double-sha256 hash of the message. | ||
| toVerify := append([]byte(self.signedMsgPrefix), []byte(*msg)...) | ||
| digest := sha256.DoubleSHA256FromByte(toVerify) | ||
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| // RecoverCompact both recovers the pubkey and validates the signature. | ||
| pubKey, _, err := ecdsa.RecoverCompact(u8sing, digest) | ||
| if err != nil { | ||
| return false, nil | ||
| } | ||
| pubKeyHex := hex.EncodeToString(pubKey.SerializeCompressed()) | ||
| return pubKeyHex == *key, goutils.NotImplementYet() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package ln | ||
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| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| "testing" | ||
| ) | ||
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| // Test the following command in core lightning | ||
| // clightning --testnet signmessage "Testing go utils" | ||
| // pub key: 03b39d1ddf13ce486de74e9e44e0538f960401a9ec75534ba9cfe4100d65426880 | ||
| // zbase32 encoding: d7m5xma1tia1hw6mjkeixqoocexiyoyn1jgm53mncszdeut5j9r1k1nq7wsrh3pkk3c3xp7mkuuxmbneitu3us36cqfn9a6sdu3wa45j | ||
| // signature: 57b7af128d712e53cb4a9157ba10621f504002924cbde56265ae344e3b4fc925484eed2c4e65aa565997b7ab54e6f58448ac6799db3e638a2fe3d61cf34c6b69 | ||
| // message: "Testing go utils" | ||
| func TestLNSignerVerifyMsgTrue(t *testing.T) { | ||
| pubKey := "03b39d1ddf13ce486de74e9e44e0538f960401a9ec75534ba9cfe4100d65426880" | ||
| zbase32 := "d7m5xma1tia1hw6mjkeixqoocexiyoyn1jgm53mncszdeut5j9r1k1nq7wsrh3pkk3c3xp7mkuuxmbneitu3us36cqfn9a6sdu3wa45j" | ||
| msg := "Testing go utils" | ||
| signer := NewLNSigner() | ||
| verified, _ := signer.VerifyMsg(&pubKey, &zbase32, &msg) | ||
| assert.Equal(t, true, verified, "Return level returned it is diffirent") | ||
| } | ||
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| func TestLNSignerVerifyMsgFalse(t *testing.T) { | ||
| pubKey := "03b39d1ddf13ce486de74e9e44e0538f960401a9ec75534ba9cfe4100d65426880" | ||
| zbase32 := "d7m5xma1tia1hw6mjkeixqoocexiyoyn1jgm53mncszdeut5j9r1k1nq7wsrh3pkk3c3xp7mkuuxmbneitu3us36cqfn9a6sdu3wa45j" | ||
| msg := "Invalid message" | ||
| signer := NewLNSigner() | ||
| verified, _ := signer.VerifyMsg(&pubKey, &zbase32, &msg) | ||
| assert.Equal(t, false, verified, "Return level returned it is diffirent") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| // Package sign give the API to implement a custom signer | ||
| // that is able to sign and verify a sequence of bytes or | ||
| // a string. | ||
| package sign | ||
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| // Signer is a common interface that give the possibility to implement | ||
| // a signer and verify algorithm in pure go | ||
| type Signer interface { | ||
| // SignMsg sign a string and return the result or an error | ||
| SignMsg(msg *string) (*string, error) | ||
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| // VerifyMsg a signature with optional public key specified as parameter | ||
| // or use some key stored inside the struct. | ||
| VerifyMsg(signature *string) (bool, error) | ||
| } | ||
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| // Keys tagger interface to store the information about the | ||
| // key (if any) that are used to sign a message. | ||
| type Keys interface{} |