DataFlex

Encrypt Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.Encrypt, which encrypts a string and returns the resulting JWE. The charset argument converts the text to bytes before encryption.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric wrapping key.

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoJwe
    Variant vHeader
    Handle hoHeader
    String sBase64Key
    String sJweCompact
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

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

    //  Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
    //  encryption algorithm (enc).
    Get Create (RefClass(cComChilkatJsonObject)) To hoHeader
    If (Not(IsComObjectCreated(hoHeader))) Begin
        Send CreateComObject of hoHeader
    End
    Get ComUpdateString Of hoHeader "alg" "A256KW" To iSuccess
    Get ComUpdateString Of hoHeader "enc" "A256GCM" To iSuccess
    Get pvComObject of hoHeader to vHeader
    Get ComSetProtectedHeader Of hoJwe vHeader 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

    //  Encrypt the content.  The 2nd argument is the charset used to convert the text to bytes.  The
    //  returned string is the JWE (compact serialization by default).
    Get ComEncrypt Of hoJwe "This is the secret content." "utf-8" To sJweCompact
    Get ComLastMethodSuccess Of hoJwe To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoJwe To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln sJweCompact


End_Procedure