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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // | ||
| // EC256.swift | ||
| // PatientScannerDemo | ||
| // | ||
| // Created by Yannick Spreen on 4/13/21. | ||
| // | ||
| // https://developer.apple.com/forums/thread/83136 | ||
| // | ||
|
|
||
| import Foundation | ||
|
|
||
| struct Signature { | ||
| public static func verify(_ signature: Data, for data: Data, with publicKey: SecKey) -> Bool { | ||
| if SecKeyIsAlgorithmSupported(publicKey, .verify, .ecdsaSignatureMessageX962SHA256) { | ||
| return verifyEC(signature, for: data, with: publicKey) | ||
| } | ||
| if SecKeyIsAlgorithmSupported(publicKey, .verify, .rsaSignatureMessagePSSSHA256) { | ||
| return verifyRSA(signature, for: data, with: publicKey) | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| static func verifyEC(_ signature: Data, for data: Data, with publicKey: SecKey) -> Bool { | ||
| let sig = ASN1.signature(from: signature) | ||
|
|
||
| var error: Unmanaged<CFError>? | ||
| let result = SecKeyVerifySignature( | ||
| publicKey, | ||
| .ecdsaSignatureMessageX962SHA256, | ||
| data as NSData, | ||
| sig as NSData, | ||
| &error | ||
| ) | ||
| if let err = error?.takeUnretainedValue().localizedDescription { | ||
| print(err) | ||
| } | ||
| error?.release() | ||
|
|
||
| return result | ||
| } | ||
|
|
||
| static func verifyRSA(_ signature: Data, for data: Data, with publicKey: SecKey) -> Bool { | ||
| let sig = signature | ||
|
|
||
| var error: Unmanaged<CFError>? | ||
| let result = SecKeyVerifySignature( | ||
| publicKey, | ||
| .rsaSignatureMessagePSSSHA256, | ||
| data as NSData, | ||
| sig as NSData, | ||
| &error | ||
| ) | ||
| if let err = error?.takeUnretainedValue().localizedDescription { | ||
| print(err) | ||
| } | ||
| error?.release() | ||
|
|
||
| return result | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| // | ||
| // X509.swift | ||
| // PatientScannerDemo | ||
| // | ||
| // Created by Yannick Spreen on 4/17/21. | ||
| // | ||
|
|
||
| import Foundation | ||
|
|
||
| struct X509 { | ||
| public static func rsa(from encodedCert: String) -> SecKey? { | ||
| guard | ||
| let encodedCertData = Data(base64Encoded: encodedCert), | ||
| let cert = SecCertificateCreateWithData(nil, encodedCertData as CFData), | ||
| let publicKey = SecCertificateCopyKey(cert) | ||
| else { | ||
| return nil | ||
| } | ||
| return publicKey | ||
| } | ||
| } |
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