638. (ios/swift5) [JOSESwift] decodeAes256GcmJwe : AES 256 JWE 복호화 수행 실시 - A256GCM

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[개발 환경 설정]

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개발 툴 : XCODE

개발 언어 : SWIFT5

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[소스 코드]

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[개발 및 테스트 환경]
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- 언어 : Swift5

- 개발 툴 : Xcode

- 기술 구분 : JOSESwift / JWE / 웹 암호화 및 복호화

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// --------------------------------------------------------------------------------------
[소스 코드]
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// --------------------------------------------------------
// MARK: - [전역 변수 선언]
// --------------------------------------------------------
public static let ACTIVITY_NAME = "C_JWE_Encryption_Module"

private let AES256_GCM_KEY = "0123456789abcdef0123456789abcdef" // [32 바이트]



// --------------------------------------------------------
// MARK: - [AES GCM : JWE 디코딩 수행]
// --------------------------------------------------------
// TODO [Call Method]
// --------------------------------------------------------
/*
  DispatchQueue.main.async { // [비동기 요청]
      
      // [JWE 복호화 수행]
      let jweString = "eyJhbGciOiJBMjU2S1ciLCJjdHkiOiJhcHBsaWNhdGlvblwvanNvbiIsImVuYyI6IkEyNTZHQ00iLCJ0eXAiOiJKV0UifQ.tf80F7VQqUpHBZiodKi-ShEmC3B7NUtPPsGg4YTzFGN2qK0I0WNV5A.NFTw2bmNs1E5pwyf.Z13WdkVrNFQBLAixzMKp5uLo6APvJIX3le-9p6jhuH5QlVY.NlQ9A5KgOByBSGs0f81xPw"
      
      let decode = C_JWE_Encryption_Module().decodeAes256GcmJwe(jweString: jweString)
      
  }
*/
// --------------------------------------------------------
func decodeAes256GcmJwe(jweString: String) -> String {
    
    
    var returnData = "" // [Return 데이터]
    var M_LOG = "" // [Log 데이터]
    
    
    // -----------------------------------------------
    // TODO [1] : [key >> Byte 변환]
    // -----------------------------------------------
    let keyBytes = self.AES256_GCM_KEY.data(using: .utf8)!
    
    
    // -----------------------------------------------
    // TODO [2] : [디코딩 수행 실시]
    // -----------------------------------------------
    if C_Util().stringNotNull(str: jweString) == true {
        
        do {
          
            let jwe = try JWE(compactSerialization: jweString)
            
            let decrypter = Decrypter(keyManagementAlgorithm: .A256KW, contentEncryptionAlgorithm: .A256GCM, decryptionKey: keyBytes)!
            
            let payload = try jwe.decrypt(using: decrypter)
            
            let message = String(data: payload.data(), encoding: .utf8)!
            
            returnData = message // [리턴 변수 삽입]
            M_LOG = "Success :: JWE Decode"
            
        }
        catch {
            M_LOG = "Exception :: \(error)"
        }
        
    }
    else {
        M_LOG = "Error :: JWE String Is Null"
    }
    
    
    S_Log._D_(description: C_JWE_Encryption_Module.ACTIVITY_NAME + " :: decodeAes256GcmJwe :: JWE 디코딩 수행", data: [
        "M_LOG :: \(M_LOG)",
        "RETURN :: \(returnData)"
    ])
    
    
    return returnData
    
}

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// --------------------------------------------------------------------------------------
[결과 출력]
// --------------------------------------------------------------------------------------

================================================================
LOG :: TYPE :: LOG :: 🟢
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LOG :: CLASS PLACE :: C_JWE_Encryption_Module.swift :: decodeAes256GcmJwe(jweString:) :: 675
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LOG :: NOW TIME :: 2025-04-06 11:09:18
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LOG :: DESCRIPTION :: C_JWE_Encryption_Module :: decodeAes256GcmJwe :: JWE 디코딩 수행
-------------------------------------------------
LOG :: M_LOG :: Success :: JWE Decode
-------------------------------------------------
LOG :: RETURN :: {
  "age" : 30,
  "name" : "Twok"
}
================================================================

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// --------------------------------------------------------------------------------------
[참고 사이트]
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[라이브러리 설치 참고 사이트]

https://blog.naver.com/kkh0977/223823265351

https://github.com/airsidemobile/JOSESwift


[JWE 개념 설명]

https://blog.naver.com/kkh0977/223817878517?trackingCode=blog_bloghome_searchlist

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[참고 사이트]

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https://blog.naver.com/kkh0977/223823265351

632. (ios/swift5) [JOSESwift] SPM 사용해 JOSESwift JWE JSON 웹 암호화 및 복호화 라이브러리 설치 방법

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