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(PowerBuilder) 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

integer li_rc
oleobject loo_Mime
integer li_Success
integer li_Verified
oleobject loo_Json
oleobject loo_SigningTime
oleobject loo_AuthAttrSigningTimeUtctime
string ls_IssuerCN
string ls_Serial
string ls_StrVal
string ls_CertSerialNumber
string ls_CertIssuerCN
string ls_CertDigestAlgOid
string ls_CertDigestAlgName
string ls_ContentType
string ls_MessageDigest
string ls_SigningAlgOid
string ls_SigningAlgName
string ls_AuthAttrContentTypeName
string ls_AuthAttrContentTypeOid
string ls_AuthAttrSigningTimeName
string ls_AuthAttrMessageDigestName
string ls_AuthAttrMessageDigestDigest
string ls_AuthAttr1_2_840_113549_1_9_15Der
string ls_AuthAttr1_3_6_1_4_1_311_16_4Der
integer i
integer li_Count_i

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

loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat_9_5_0.Mime")
if li_rc < 0 then
    destroy loo_Mime
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Load the signed MIME from a file...
li_Success = loo_Mime.LoadMimeFile("qa_data/mime/detached_sig.eml")
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

// Verify the S/MIME and restore the MIME
// to the structure/content it had prior to signing.
li_Verified = loo_Mime.Verify()
if li_Verified = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

// Examine the details of what was verified.
loo_Json = loo_Mime.LastJsonData()
loo_Json.EmitCompact = 0
Write-Debug loo_Json.Emit()

// 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

loo_SigningTime = create oleobject
li_rc = loo_SigningTime.ConnectToNewObject("Chilkat_9_5_0.DtObj")

loo_AuthAttrSigningTimeUtctime = create oleobject
li_rc = loo_AuthAttrSigningTimeUtctime.ConnectToNewObject("Chilkat_9_5_0.DtObj")

i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.certs")
do while i < li_Count_i
    loo_Json.I = i
    ls_IssuerCN = loo_Json.StringOf("pkcs7.verify.certs[i].issuerCN")
    ls_Serial = loo_Json.StringOf("pkcs7.verify.certs[i].serial")
    i = i + 1
loop
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.digestAlgorithms")
do while i < li_Count_i
    loo_Json.I = i
    ls_StrVal = loo_Json.StringOf("pkcs7.verify.digestAlgorithms[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.signerInfo")
do while i < li_Count_i
    loo_Json.I = i
    ls_CertSerialNumber = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.serialNumber")
    ls_CertIssuerCN = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerCN")
    ls_CertDigestAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid")
    ls_CertDigestAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName")
    ls_ContentType = loo_Json.StringOf("pkcs7.verify.signerInfo[i].contentType")
    loo_Json.DtOf("pkcs7.verify.signerInfo[i].signingTime",0,loo_SigningTime)
    ls_MessageDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].messageDigest")
    ls_SigningAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].signingAlgOid")
    ls_SigningAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].signingAlgName")
    ls_AuthAttrContentTypeName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name")
    ls_AuthAttrContentTypeOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid")
    ls_AuthAttrSigningTimeName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name")
    loo_Json.DtOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime",0,loo_AuthAttrSigningTimeUtctime)
    ls_AuthAttrMessageDigestName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name")
    ls_AuthAttrMessageDigestDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest")
    ls_AuthAttr1_2_840_113549_1_9_15Der = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.15\".der")
    ls_AuthAttr1_3_6_1_4_1_311_16_4Der = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.3.6.1.4.1.311.16.4\".der")
    i = i + 1
loop

destroy loo_Json


destroy loo_Mime
destroy loo_SigningTime
destroy loo_AuthAttrSigningTimeUtctime

 

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