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DataFlex Examples

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(DataFlex) Verify and Unwrap S/MIME, and get Information about CMS Signature

Demonstrates calling the Verify method to verify and unwrap S/MIME. The MIME is restored to the original structure that it would have originally had prior to signing. The Verify method works with both detached signatures, as well as opaque/attached signatures.

Calls LastJsonData to get information about the signature(s) that were verified.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoMime
    Boolean iSuccess
    Boolean iVerified
    Variant vJson
    Handle hoJson
    Variant vSigningTime
    Handle hoSigningTime
    Variant vAuthAttrSigningTimeUtctime
    Handle hoAuthAttrSigningTimeUtctime
    String sIssuerCN
    String sSerial
    String sStrVal
    String sCertSerialNumber
    String sCertIssuerCN
    String sCertDigestAlgOid
    String sCertDigestAlgName
    String sContentType
    String sMessageDigest
    String sSigningAlgOid
    String sSigningAlgName
    String sAuthAttrContentTypeName
    String sAuthAttrContentTypeOid
    String sAuthAttrSigningTimeName
    String sAuthAttrMessageDigestName
    String sAuthAttrMessageDigestDigest
    String sAuthAttr1_2_840_113549_1_9_15Der
    String sAuthAttr1_3_6_1_4_1_311_16_4Der
    Integer i
    Integer iCount_i
    String sTemp1

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatMime)) To hoMime
    If (Not(IsComObjectCreated(hoMime))) Begin
        Send CreateComObject of hoMime
    End

    // Load the signed MIME from a file...
    Get ComLoadMimeFile Of hoMime "qa_data/mime/detached_sig.eml" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Verify the S/MIME and restore the MIME
    // to the structure/content it had prior to signing.
    Get ComVerify Of hoMime To iVerified
    If (iVerified = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Examine the details of what was verified.
    Get ComLastJsonData Of hoMime To vJson
    If (IsComObject(vJson)) Begin
        Get Create (RefClass(cComChilkatJsonObject)) To hoJson
        Set pvComObject Of hoJson To vJson
    End
    Set ComEmitCompact Of hoJson To False
    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    // The code to parse the following JSON (i.e. extract desired information) is shown below..

    // {
    //   "pkcs7": {
    //     "verify": {
    //       "certs": [
    //         {
    //           "issuerCN": "VeriSign Class 1 Public Primary Certification Authority - G3",
    //           "serial": "0702A21A85B84B659E180A6EE6F5A365"
    //         },
    //         {
    //           "issuerCN": "VeriSign Class 1 Public Primary Certification Authority - G3",
    //           "serial": "008B5B75568454850B00CFAF3848CEB1A4"
    //         },
    //         {
    //           "issuerCN": "Symantec Class 1 Individual Subscriber CA - G5",
    //           "serial": "619C55C32FF6BD1A7B7E0330D21C8F3C"
    //         }
    //       ],
    //       "digestAlgorithms": [
    //         "sha1"
    //       ],
    //       "signerInfo": [
    //         {
    //           "cert": {
    //             "serialNumber": "619C55C32FF6BD1A7B7E0330D21C8F3C",
    //             "issuerCN": "Symantec Class 1 Individual Subscriber CA - G5",
    //             "digestAlgOid": "1.3.14.3.2.26",
    //             "digestAlgName": "SHA1"
    //           },
    //           "contentType": "1.2.840.113549.1.7.1",
    //           "signingTime": "160428055000Z",
    //           "messageDigest": "2hJJVmO/jtaJV5uCKMFzIkRRvtY=",
    //           "signingAlgOid": "1.2.840.113549.1.1.1",
    //           "signingAlgName": "RSA-PKCSV-1_5",
    //           "authAttr": {
    //             "1.2.840.113549.1.9.3": {
    //               "name": "contentType",
    //               "oid": "1.2.840.113549.1.7.1"
    //             },
    //             "1.2.840.113549.1.9.5": {
    //               "name": "signingTime",
    //               "utctime": "160428055000Z"
    //             },
    //             "1.2.840.113549.1.9.4": {
    //               "name": "messageDigest",
    //               "digest": "2hJJVmO/jtaJV5uCKMFzIkRRvtY="
    //             },
    //             "1.2.840.113549.1.9.15": {
    //               "der": "MFAwCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIAgDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKA=="
    //             },
    //             "1.3.6.1.4.1.311.16.4": {
    //               "der": "MIG7MIG...7fgMw0hyPPA=="
    //             }
    //           }
    //         }
    //       ]
    //     }
    //   }
    // }

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    Get Create (RefClass(cComChilkatDtObj)) To hoSigningTime
    If (Not(IsComObjectCreated(hoSigningTime))) Begin
        Send CreateComObject of hoSigningTime
    End
    Get Create (RefClass(cComChilkatDtObj)) To hoAuthAttrSigningTimeUtctime
    If (Not(IsComObjectCreated(hoAuthAttrSigningTimeUtctime))) Begin
        Send CreateComObject of hoAuthAttrSigningTimeUtctime
    End

    Move 0 To i
    Get ComSizeOfArray Of hoJson "pkcs7.verify.certs" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "pkcs7.verify.certs[i].issuerCN" To sIssuerCN
        Get ComStringOf Of hoJson "pkcs7.verify.certs[i].serial" To sSerial
        Move (i + 1) To i
    Loop

    Move 0 To i
    Get ComSizeOfArray Of hoJson "pkcs7.verify.digestAlgorithms" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "pkcs7.verify.digestAlgorithms[i]" To sStrVal
        Move (i + 1) To i
    Loop

    Move 0 To i
    Get ComSizeOfArray Of hoJson "pkcs7.verify.signerInfo" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.serialNumber" To sCertSerialNumber
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.issuerCN" To sCertIssuerCN
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.digestAlgOid" To sCertDigestAlgOid
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.digestAlgName" To sCertDigestAlgName
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].contentType" To sContentType
        Get pvComObject of hoSigningTime to vSigningTime
        Get ComDtOf Of hoJson "pkcs7.verify.signerInfo[i].signingTime" False vSigningTime To iSuccess
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].messageDigest" To sMessageDigest
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].signingAlgOid" To sSigningAlgOid
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].signingAlgName" To sSigningAlgName
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.3".name' To sAuthAttrContentTypeName
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.3".oid' To sAuthAttrContentTypeOid
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.5".name' To sAuthAttrSigningTimeName
        Get pvComObject of hoAuthAttrSigningTimeUtctime to vAuthAttrSigningTimeUtctime
        Get ComDtOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.5".utctime' False vAuthAttrSigningTimeUtctime To iSuccess
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.4".name' To sAuthAttrMessageDigestName
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.4".digest' To sAuthAttrMessageDigestDigest
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.15".der' To sAuthAttr1_2_840_113549_1_9_15Der
        Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].authAttr."1.3.6.1.4.1.311.16.4".der' To sAuthAttr1_3_6_1_4_1_311_16_4Der
        Move (i + 1) To i
    Loop

    Send Destroy of hoJson


End_Procedure

 

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