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feat: add SetDERConversion to reset skipDERConversion (#25435)

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Co-authored-by: Alex | Cosmos Labs <alex@cosmoslabs.io>
This commit is contained in:
mmsqe
2025-10-21 18:36:27 +00:00
committed by GitHub
co-authored by Alex | Cosmos Labs
parent 17f9c3bd0a
commit 9c4af5a70e
2 changed files with 50 additions and 1 deletions
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crypto/ledger/ledger_secp256k1.go
+49 -1
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@@ -17,6 +17,9 @@ import (
// options stores the Ledger Options that can be used to customize Ledger usage
var options Options
// AppName defines the Ledger app used for signing. Cosmos SDK uses the Cosmos app
const AppName = "Cosmos"
type (
// discoverLedgerFn defines a Ledger discovery function that returns a
// connected device or an error upon failure. Its allows a method to avoid CGO
@@ -66,7 +69,7 @@ func initOptionsDefault() {
options.createPubkey = func(key []byte) types.PubKey {
return &secp256k1.PubKey{Key: key}
}
options.appName = "Cosmos"
options.appName = AppName
options.skipDERConversion = false
}
@@ -90,6 +93,51 @@ func SetSkipDERConversion() {
options.skipDERConversion = true
}
// SetDERConversion configures whether DER signature conversion should be enabled.
// When enabled (true), signatures returned from the Ledger device are converted
// from DER format to BER format, which is the standard behavior for Cosmos SDK chains.
// When disabled (false), raw signatures are used without conversion, which is
// typically required for Ethereum/EVM-compatible chains.
//
// Parameters:
// - enabled: true to enable DER conversion (Cosmos chains), false to disable (Ethereum chains)
//
// Example usage for different coin types in a key management CLI:
//
// switch coinType {
// case 60:
// // Ethereum/EVM chains - disable DER conversion for raw signatures
// cosmosLedger.SetDiscoverLedger(func() (cosmosLedger.SECP256K1, error) {
// return evmkeyring.LedgerDerivation()
// })
// cosmosLedger.SetCreatePubkey(func(key []byte) cryptotypes.PubKey {
// return evmkeyring.CreatePubkey(key)
// })
// cosmosLedger.SetAppName(evmkeyring.AppName)
// cosmosLedger.SetDERConversion(false) // Disable DER conversion for Ethereum
// case 118:
// // Cosmos SDK chains - enable DER conversion for signature compatibility
// cosmosLedger.SetDiscoverLedger(func() (cosmosLedger.SECP256K1, error) {
// device, err := ledger.FindLedgerCosmosUserApp()
// if err != nil {
// return nil, err
// }
// return device, nil
// })
// cosmosLedger.SetCreatePubkey(func(key []byte) cryptotypes.PubKey {
// return &secp256k1.PubKey{Key: key}
// })
// cosmosLedger.SetAppName(cosmosLedger.AppName)
// cosmosLedger.SetDERConversion(true) // Enable DER conversion for Cosmos
// default:
// return fmt.Errorf(
// "unsupported coin type %d for Ledger. Supported coin types: 60 (Ethereum app), 118 (Cosmos app)", coinType,
// )
// }
func SetDERConversion(enabled bool) {
options.skipDERConversion = !enabled
}
// NewPrivKeySecp256k1Unsafe will generate a new key and store the public key for later use.
//
// This function is marked as unsafe as it will retrieve a pubkey without user verification.