Go
Go
Verify and Unwrap S/MIME, and get Information about CMS Signature
See more MIME Examples
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.
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success := false
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
mime := chilkat.NewMime()
// Load the signed MIME from a file...
success = mime.LoadMimeFile("qa_data/mime/detached_sig.eml")
if success == false {
fmt.Println(mime.LastErrorText())
mime.DisposeMime()
return
}
// Verify the S/MIME and restore the MIME
// to the structure/content it had prior to signing.
verified := mime.Verify()
if verified == false {
fmt.Println(mime.LastErrorText())
mime.DisposeMime()
return
}
// Examine the details of what was verified.
json := chilkat.NewJsonObject()
mime.GetLastJsonData(json)
json.SetEmitCompact(false)
fmt.Println(*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
signingTime := chilkat.NewDtObj()
authAttrSigningTimeUtctime := chilkat.NewDtObj()
var issuerCN *string = new(string)
var serial *string = new(string)
var strVal *string = new(string)
var certSerialNumber *string = new(string)
var certIssuerCN *string = new(string)
var certDigestAlgOid *string = new(string)
var certDigestAlgName *string = new(string)
var contentType *string = new(string)
var messageDigest *string = new(string)
var signingAlgOid *string = new(string)
var signingAlgName *string = new(string)
var authAttrContentTypeName *string = new(string)
var authAttrContentTypeOid *string = new(string)
var authAttrSigningTimeName *string = new(string)
var authAttrMessageDigestName *string = new(string)
var authAttrMessageDigestDigest *string = new(string)
var authAttr1_2_840_113549_1_9_15Der *string = new(string)
var authAttr1_3_6_1_4_1_311_16_4Der *string = new(string)
i := 0
count_i := json.SizeOfArray("pkcs7.verify.certs")
for i < count_i {
json.SetI(i)
issuerCN = json.StringOf("pkcs7.verify.certs[i].issuerCN")
serial = json.StringOf("pkcs7.verify.certs[i].serial")
i = i + 1
}
i = 0
count_i = json.SizeOfArray("pkcs7.verify.digestAlgorithms")
for i < count_i {
json.SetI(i)
strVal = json.StringOf("pkcs7.verify.digestAlgorithms[i]")
i = i + 1
}
i = 0
count_i = json.SizeOfArray("pkcs7.verify.signerInfo")
for i < count_i {
json.SetI(i)
certSerialNumber = json.StringOf("pkcs7.verify.signerInfo[i].cert.serialNumber")
certIssuerCN = json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerCN")
certDigestAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid")
certDigestAlgName = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName")
contentType = json.StringOf("pkcs7.verify.signerInfo[i].contentType")
json.DtOf("pkcs7.verify.signerInfo[i].signingTime",false,signingTime)
messageDigest = json.StringOf("pkcs7.verify.signerInfo[i].messageDigest")
signingAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].signingAlgOid")
signingAlgName = json.StringOf("pkcs7.verify.signerInfo[i].signingAlgName")
authAttrContentTypeName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name")
authAttrContentTypeOid = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid")
authAttrSigningTimeName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name")
json.DtOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime",false,authAttrSigningTimeUtctime)
authAttrMessageDigestName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name")
authAttrMessageDigestDigest = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest")
authAttr1_2_840_113549_1_9_15Der = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.15\".der")
authAttr1_3_6_1_4_1_311_16_4Der = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.3.6.1.4.1.311.16.4\".der")
i = i + 1
}
mime.DisposeMime()
json.DisposeJsonObject()
signingTime.DisposeDtObj()
authAttrSigningTimeUtctime.DisposeDtObj()