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* add ark-ec-vrfs * rm ark-ec-vrfs * init * change to cbindgen * fix * fix * fix * fix name * fix clean * fix setup * fix setup * fix * swift wrapper with tests * fix lint * fix ci * fix access * include_bytes
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| Original file line number | Diff line number | Diff line change |
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@@ -8,5 +8,8 @@ DerivedData/ | |
| .netrc | ||
| .vscode/settings.json | ||
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| # rust build | ||
| target | ||
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| # static lib files | ||
| .lib/ | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,180 @@ | ||
| import bandersnatch_vrfs | ||
| import Foundation | ||
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| public enum BandersnatchError: Error { | ||
| case createSecretFailed | ||
| case deserializePubKeyFailed | ||
| case generatePubKeyFailed | ||
| case createProverFailed | ||
| case createVerifierFailed | ||
| case ringVRFSignFailed | ||
| case ietfVRFSignFailed | ||
| case verifyRingVrfFailed | ||
| case verifyIetfVrfFailed | ||
| } | ||
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| extension Data { | ||
| init(cSecret: CSecret) { | ||
| let tuple = cSecret._0 | ||
| // a short way to convert (UInt8, UInt8, ...) to [UInt8, UInt8, ...] | ||
| let array: [UInt8] = Swift.withUnsafeBytes(of: tuple) { | ||
| Array($0.bindMemory(to: UInt8.self)) | ||
| } | ||
| self.init(array) | ||
| } | ||
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| init(cPublic: CPublic) { | ||
| let tuple = cPublic._0 | ||
| let array: [UInt8] = Swift.withUnsafeBytes(of: tuple) { | ||
| Array($0.bindMemory(to: UInt8.self)) | ||
| } | ||
| self.init(array) | ||
| } | ||
| } | ||
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| extension CPublic { | ||
| private static func deserialize(data: Data) throws -> CPublic { | ||
| let cPublicPtr = public_deserialize_compressed([UInt8](data), UInt(data.count)) | ||
| guard let cPublicPtr else { | ||
| throw BandersnatchError.deserializePubKeyFailed | ||
| } | ||
| return CPublic(_0: cPublicPtr.pointee._0) | ||
| } | ||
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| init(data: Data) throws { | ||
| self = try CPublic.deserialize(data: data) | ||
| } | ||
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| init(data32: Data32) throws { | ||
| self = try CPublic.deserialize(data: data32.data) | ||
| } | ||
| } | ||
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| public struct Bandersnatch { | ||
| public let secret: Data96 | ||
| public let publicKey: Data32 | ||
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| public init(seed: Data) throws { | ||
| let seedBytes = [UInt8](seed) | ||
| let secretPtr = secret_new_from_seed(seedBytes, UInt(seed.count)) | ||
| guard let secretPtr else { | ||
| throw BandersnatchError.createSecretFailed | ||
| } | ||
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| secret = Data96(Data(cSecret: secretPtr.pointee))! | ||
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| let publicPtr = secret_get_public(secretPtr) | ||
| guard let publicPtr else { | ||
| throw BandersnatchError.generatePubKeyFailed | ||
| } | ||
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| publicKey = Data32(Data(cPublic: publicPtr.pointee))! | ||
| } | ||
| } | ||
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| public class Prover { | ||
| private var prover: OpaquePointer | ||
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| /// init with a set of bandersnatch public keys and provider index | ||
| public init(ring: [Data32], proverIdx: UInt) throws { | ||
| var success = false | ||
| let cPublicArr = try ring.map { try CPublic(data32: $0) } | ||
| prover = prover_new(cPublicArr, UInt(ring.count), proverIdx, &success) | ||
| if !success { | ||
| throw BandersnatchError.createProverFailed | ||
| } | ||
| } | ||
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| deinit { | ||
| prover_free(prover) | ||
| } | ||
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| /// Anonymous VRF signature. | ||
| /// | ||
| /// Used for tickets submission. | ||
| public func ringVRFSign(vrfInputData: Data, auxData: Data) throws -> Data784 { | ||
| var output = [UInt8](repeating: 0, count: 784) | ||
| let success = prover_ring_vrf_sign( | ||
| &output, prover, [UInt8](vrfInputData), UInt(vrfInputData.count), [UInt8](auxData), | ||
| UInt(auxData.count) | ||
| ) | ||
| if !success { | ||
| throw BandersnatchError.ringVRFSignFailed | ||
| } | ||
| return Data784(Data(output))! | ||
| } | ||
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| /// Non-Anonymous VRF signature. | ||
| /// | ||
| /// Used for ticket claiming during block production. | ||
| /// Not used with Safrole test vectors. | ||
| public func ietfVRFSign(vrfInputData: Data, auxData: Data) throws -> Data96 { | ||
| var output = [UInt8](repeating: 0, count: 96) | ||
| let success = prover_ietf_vrf_sign( | ||
| &output, prover, [UInt8](vrfInputData), UInt(vrfInputData.count), [UInt8](auxData), | ||
| UInt(auxData.count) | ||
| ) | ||
| if !success { | ||
| throw BandersnatchError.ietfVRFSignFailed | ||
| } | ||
| return Data96(Data(output))! | ||
| } | ||
| } | ||
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| public class Verifier { | ||
| private var verifier: OpaquePointer | ||
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| public init(ring: [Data32]) throws { | ||
| var success = false | ||
| let cPublicArr = try ring.map { try CPublic(data32: $0) } | ||
| verifier = verifier_new(cPublicArr, UInt(ring.count), &success) | ||
| if !success { | ||
| throw BandersnatchError.createVerifierFailed | ||
| } | ||
| } | ||
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| deinit { | ||
| verifier_free(verifier) | ||
| } | ||
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| /// Anonymous VRF signature verification. | ||
| /// | ||
| /// Used for tickets verification. | ||
| /// | ||
| /// On success returns the VRF output hash. | ||
| public func ringVRFVerify(vrfInputData: Data, auxData: Data, signature: Data) -> Result< | ||
| Data32, BandersnatchError | ||
| > { | ||
| var output = [UInt8](repeating: 0, count: 32) | ||
| let success = verifier_ring_vrf_verify( | ||
| &output, verifier, [UInt8](vrfInputData), UInt(vrfInputData.count), [UInt8](auxData), | ||
| UInt(auxData.count), [UInt8](signature), UInt(signature.count) | ||
| ) | ||
| if !success { | ||
| return .failure(.verifyRingVrfFailed) | ||
| } | ||
| return .success(Data32(Data(output))!) | ||
| } | ||
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| /// Non-Anonymous VRF signature verification. | ||
| /// | ||
| /// Used for ticket claim verification during block import. | ||
| /// Not used with Safrole test vectors. | ||
| /// | ||
| /// On success returns the VRF output hash. | ||
| public func ietfVRFVerify( | ||
| vrfInputData: Data, auxData: Data, signature: Data, signerKeyIndex: UInt | ||
| ) | ||
| -> Result<Data32, BandersnatchError> | ||
| { | ||
| var output = [UInt8](repeating: 0, count: 32) | ||
| let success = verifier_ietf_vrf_verify( | ||
| &output, verifier, [UInt8](vrfInputData), UInt(vrfInputData.count), [UInt8](auxData), | ||
| UInt(auxData.count), [UInt8](signature), UInt(signature.count), signerKeyIndex | ||
| ) | ||
| if !success { | ||
| return .failure(.verifyIetfVrfFailed) | ||
| } | ||
| return .success(Data32(Data(output))!) | ||
| } | ||
| } |
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