Decrypt a JWE into BinData

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.DecryptBd, which decrypts a recipient of a loaded JWE and writes the plaintext bytes into a BinData.

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoJwe
    String sJweCompact
    String sBase64Key
    Variant vBd
    Handle hoBd
    String sTemp1
    Integer iTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatJwe)) To hoJwe
    If (Not(IsComObjectCreated(hoJwe))) Begin
        Send CreateComObject of hoJwe
    End

    //  Load the JWE compact serialization to be decrypted.
    Move "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>" To sJweCompact
    Get ComLoadJwe Of hoJwe sJweCompact To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoJwe To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
    //  from a secure source rather than hard-coding it.
    Move "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=" To sBase64Key
    Get ComSetWrappingKey Of hoJwe 0 sBase64Key "base64" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoJwe To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Decrypt recipient index 0, writing the plaintext bytes into a BinData.
    Get Create (RefClass(cComChilkatBinData)) To hoBd
    If (Not(IsComObjectCreated(hoBd))) Begin
        Send CreateComObject of hoBd
    End
    Get pvComObject of hoBd to vBd
    Get ComDecryptBd Of hoJwe 0 vBd To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoJwe To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComNumBytes Of hoBd To iTemp1
    Showln "Decrypted " iTemp1 " bytes."


End_Procedure