23 lines
986 B
Swift
23 lines
986 B
Swift
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public extension ECKeyPair {
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@objc public var hexEncodedPrivateKey: String {
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return privateKey().map { String(format: "%02hhx", $0) }.joined()
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}
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@objc public var hexEncodedPublicKey: String {
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// Prefixing with "05" is necessary for what seems to be a sort of Signal public key versioning system
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return "05" + publicKey().map { String(format: "%02hhx", $0) }.joined()
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}
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@objc public static func isValidHexEncodedPublicKey(candidate: String) -> Bool {
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// Check that it's a valid hexadecimal encoding
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let allowedCharacters = CharacterSet(charactersIn: "0123456789ABCDEF")
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guard candidate.uppercased().unicodeScalars.allSatisfy({ allowedCharacters.contains($0) }) else { return false }
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// Check that it has length 66 and a leading "05"
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guard candidate.count == 66 && candidate.hasPrefix("05") else { return false }
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// It appears to be a valid public key
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return true
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}
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}
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