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(DataFlex) Compute JWK Thumbprint for RSA and EC Private Keys

Demonstrates how to compute a JSON Web Key thumbprint for a private key (RSA or ECC).

Note: This example requires Chilkat v9.5.0.66 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoPrivKey
    Handle hoSbPem
    Boolean iBCrlf
    Boolean iSuccess
    Boolean iSuccess
    String sTemp1

    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
    If (Not(IsComObjectCreated(hoPrivKey))) Begin
        Send CreateComObject of hoPrivKey
    End

    // A private key can be loaded from any format (binary DER, PEM, etc.)
    // This example will load the private keys from PEM format, 
    // and will then compute the JWK thumbprint.

    // First do it for this RSA private key...

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbPem
    If (Not(IsComObjectCreated(hoSbPem))) Begin
        Send CreateComObject of hoSbPem
    End
    Move True To iBCrlf
    Get ComAppendLine Of hoSbPem "-----BEGIN RSA PRIVATE KEY-----" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "Proc-Type: 4,ENCRYPTED" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "DEK-Info: DES-EDE3-CBC,2E65118E6C7B5207" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "7cYUTW4ZBdmVZ4ILB08hcTdm5ib0E0zcy+I7pHpNQfJHtI7BJ4omys5S19ufJPBJ" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "IzYjeO7oTVqI37F6EUmjZqG4WVE2UQbQDkosZbZN82O4Ipu1lFAPEbwjqePMKufz" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "snSQHKfnbyyDPEVNlJbs19NXC8v6g+pQay5rH/I6N2iBxgsTmuemZ54EhNQMZyEN" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "R/CiheArWEH9H8/4hd2gc9Tb2s0MwGHILL4kbbNm5tp3xw4ik7OYWNrj3m+nG6Xb" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "vKXh2xEanAZAyMXTqDJTHdn7/CEqusQPJjZGV+Mf1kjKu7p4qcXFnIXP5ILnTW7b" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "lHoWC4eweDzKOMRzXmbABEVSUvx2SmPl4TcoC5L1SCAHEmZaKbaY7S5l53u6gl0f" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "ULuQbt7Hr3THznlNFKkGT1/yVNt2QOm1emZd55LaNe8E7XsNSlhl0grYQ+Ue8Jba" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "x85OapltVjxM9wVCwbgFyi04ihdKHo9e+uYKeTGKv0hU5O7HEH1ev6t/s2u/UG6h" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "TqEsYrVp0CMHpt5uAF6nZyK6GZ/CHTxh/rz1hADMofem59+e6tVtjnPGA3EjnJT8" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "BMOw/D2QIDxjxj2GUzz+YJp50ENhWrL9oSDkG2nzv4NVL77QIy+T/2/f4PgokUDO" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "QJjIfxPWE40cHGHpnQtZvEPoxP0H3T0YhmEVwuJxX3uaWOY/8Fa1c7Ln0SwWdfV5" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "gYvJV8o6c3sumcq1O3agPDlHC5O4IxG7AZQ8CHRDyASogzfkY6P579ZOGYaO4al7" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "WA1YIpsHs3/1f4SByMuWe0NVkFfvXckjpqGrBQpTmqQzk6baa0VQ0cwU3XlkwHac" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "WB/fQ4jylwFzZDcp5JAo53n6aU72zgNvDlGTNKwdXXZI5U3JPocH0AiZgFFWYJLd" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "63PJLDnjyE3i6XMVlxifXKkXVv0RYSz+ByS7Oz9aCgnQhNU8ycv+UxtfkPQih5zE" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "/0Y2EEFknajmFJpNXczzF8OEzaswmR0AOjcCiklZKRf61rf5faJxJhhqKEEBJuL6" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "oodDVRk3OGU1yQSBazT8nK3V+e6FMo3tWkra2BXFCD+pKxTy014Cp59S1w6F1Fjt" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "WX7eMWSLWfQ56j2kLMBHq5gb2arqlqH3fsYOTD3TNjCYF3Sgx309kVPuOK5vw61P" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "pnL/LN3iGY42WR+9lfAyNN2qj9zvwKwscyYs5+DPQoPmcPcVGc3v/u66bLcOGbEU" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "OlGa/6gdD4GCp5E4fP/7GbnEY/PW2abquFhGB+pVdl3/4+1U/8kItlfWNZoG4FhE" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "gjMd7glmrdFiNJFFpf5ks1lVXGqJ4mZxqtEZrxUEwciZjm4V27a+E2KyV9NnksZ6" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "xF4tGPKIPsvNTV5o8ZqjiacxgbYmr2ywqDXKCgpU/RWSh1sLapqSQqbH/w0MquUj" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "VhVX0RMYH/foKtjagZf/KO1/mnCITl86treIdachGgR4wr/qqMjrpPUaPLCRY3JQ" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "00XUP1Mu6YPE0SnMYAVxZheqKHly3a1pg4Xp7YWlM671oUORs3+VENfnbIxgr+2D" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "TiJT9PxwpfK53Oh7RBSWHJZRuAdLUXE8DG+bl0N/QkJM6pFUxTI1AQ==" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "-----END RSA PRIVATE KEY-----" iBCrlf To iSuccess

    // The actual password for the above PEM is "passwd".
    Get ComGetAsString Of hoSbPem To sTemp1
    Get ComLoadEncryptedPem Of hoPrivKey sTemp1 "passwd" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Generate the JWK thumbprint:
    Get ComGetJwkThumbprint Of hoPrivKey "SHA256" To sTemp1
    Showln "JWK thumbprint: " sTemp1

    // Output:
    // JWK thumbprint: QzUpUAW1Y5iksGxq3r1o3JMROR6D7FLwvRlHmDQVg0I

    // --------------------------------------------------------------
    // Now let's do an EC private key.  The following is an unencrypted PEM containing a 384-bit EC key..
    Send ComClear To hoSbPem
    Get ComAppendLine Of hoSbPem "-----BEGIN PRIVATE KEY-----" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDAamStb0Xep3y3sWw2u" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "SSAdUPkgQ9Rvhlnx8XEVOYy2teh69T0on77ja02m03n8t8WhZANiAARUNSar38Rz" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "lKPyZFsNSGUanzpNRth0C+MikVEH8FAlDHMMpAs34dyF4IK0uxgbiEe9bQ+ieLrl" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "6xwFR0yaTivuwoyXC+ScGUnwnpaXmid6UUgw4ypbneHsaKuZ9JLdMAo=" iBCrlf To iSuccess
    Get ComAppendLine Of hoSbPem "-----END PRIVATE KEY-----" iBCrlf To iSuccess

    Get ComGetAsString Of hoSbPem To sTemp1
    Get ComLoadPem Of hoPrivKey sTemp1 To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Generate the JWK thumbprint:
    Get ComGetJwkThumbprint Of hoPrivKey "SHA256" To sTemp1
    Showln "JWK thumbprint: " sTemp1

    // Output:
    // JWK thumbprint: ABAUUfNSONFsZYvZ_o_0bsPT3qeG3jttXB09VC_ETWQ


End_Procedure

 

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