Ios SECP256K1使用锯齿形Swift
我正在尝试使用Sawtooth SDK对签名进行签名和验证。看了一下文档,我照着做了,但没有成功Ios SECP256K1使用锯齿形Swift,ios,swift,sdk,Ios,Swift,Sdk,我正在尝试使用Sawtooth SDK对签名进行签名和验证。看了一下文档,我照着做了,但没有成功 import SawtoothSigning public class Secp256k1 { private var signer: Signer private var privateKey: PrivateKey private var context = Secp256k1Context() //Here it crashed with error Thread 1: EXC_BAD_A
import SawtoothSigning
public class Secp256k1 {
private var signer: Signer
private var privateKey: PrivateKey
private var context = Secp256k1Context() //Here it crashed with error Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ffeeda61ff8)
public func sign(message: [UInt8]) -> String {
var result = ""
do {
result = try signer.sign(data: message)
} catch {
print("Error signing")
}
return result
}
public func getPrivateKey() -> PrivateKey {
if let privateKey = UserDefaults.standard.string(forKey: "privateKey") {
return Secp256k1PrivateKey.fromHex(hexPrivKey: privateKey)
} else {
let privateKey = context.newRandomPrivateKey()
UserDefaults.standard.set(privateKey.hex(), forKey: "privateKey" )
do {
let pubKey = try context.getPublicKey(privateKey: privateKey)
UserDefaults.standard.set(pubKey.hex(), forKey: "publicKey" )
} catch {
if #available(iOS 10.0, *) {
print("Error creating public key")
}
}
return privateKey
}
}
public init() {
self.privateKey = Secp256k1().getPrivateKey()
self.signer = Signer(context: context, privateKey: self.privateKey)
}
}
有没有人使用过这个SDK,并且知道它为什么会崩溃?或者有没有更简单的SDK?您循环使用了
Secp256k1
构造函数(即在owninit
中调用Secp256k1()
),导致崩溃
以下是解决方案的可能变体(已测试并使用Xcode 11.4):
公共类Secp256k1{
私有var签名者:签名者
private var privateKey:privateKey
私有静态var context=Secp256k1Context()//字符串{
var result=“”
做{
结果=尝试signer.sign(数据:消息)
}抓住{
打印(“错误签名”)
}
返回结果
}
公共静态函数getPrivateKey()->PrivateKey{//成功了!谢谢!但似乎通过添加一个单词“static”来解决这个问题?我可以知道为什么吗?static
表示成员不属于类的实例,而是属于整个类,所以要访问这样的成员,不需要实例化类,而是直接使用类,例如Secp256k1.context
。
public class Secp256k1 {
private var signer: Signer
private var privateKey: PrivateKey
private static var context = Secp256k1Context() // << shared !!
public func sign(message: [UInt8]) -> String {
var result = ""
do {
result = try signer.sign(data: message)
} catch {
print("Error signing")
}
return result
}
public static func getPrivateKey() -> PrivateKey { // << shared !!
if let privateKey = UserDefaults.standard.string(forKey: "privateKey") {
return Secp256k1PrivateKey.fromHex(hexPrivKey: privateKey)
} else {
let privateKey = context.newRandomPrivateKey()
UserDefaults.standard.set(privateKey.hex(), forKey: "privateKey" )
do {
let pubKey = try context.getPublicKey(privateKey: privateKey)
UserDefaults.standard.set(pubKey.hex(), forKey: "publicKey" )
} catch {
if #available(iOS 10.0, *) {
print("Error creating public key")
}
}
return privateKey
}
}
public init() {
self.privateKey = Secp256k1.getPrivateKey() // no cycle now !!
self.signer = Signer(context: Secp256k1.context, privateKey: self.privateKey)
}
}