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(Go) Validate CAdES-T Signature (.p7m)Validates a CAdES-T CMS signature and extracts the time-stamp token and gets information about it. Also validates the time-stamp token. Note: This example requires Chilkat v9.5.0.78 or greater.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. crypt := chilkat.NewCrypt2() var success bool // Indicate that the CAdES-T timestamp tokens must also pass validation for the signature to be validated. cmsOptions := chilkat.NewJsonObject() cmsOptions.UpdateBool("ValidateTimestampTokens",true) crypt.SetCmsOptions(cmsOptions.Emit()) // Validate the .p7m and extract the original signed data to an output file. // Note: The timestampToken is an unauthenticated attribute. See the code below that parses the LastJsonData // for details about examining timestampToken. success = crypt.VerifyP7M("qa_data/cades/CAdES-T/Signature-C-T-1.p7m","qa_output/out.dat") // Get information about the CMS signature in the LastJsonData. // The detailed results of the signature validation are available in LastJsonData. // (If the non-success return status was caused by an error such as "file not found", then the // LastJsonData would be empty.) json := crypt.LastJsonData() json.SetEmitCompact(false) fmt.Println(*json.Emit()) // Here is a sample result: // See the parsing code below.. // Use this online tool to generate parsing code from sample JSON: // Generate Parsing Code from JSON // { // "pkcs7": { // "verify": { // "digestAlgorithms": [ // "sha256" // ], // "signerInfo": [ // { // "cert": { // "serialNumber": "00DCB814678CDB", // "issuerCN": "LevelBCAOK", // "issuerDN": "", // "digestAlgOid": "2.16.840.1.101.3.4.2.1", // "digestAlgName": "SHA256" // }, // "contentType": "1.2.840.113549.1.7.1", // "signingTime": "131203065741Z", // "messageDigest": "JJZt41Nt8VsYahP+Xti4rR3vBDkUfRd6gquItl6R5Os=", // "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": "131203065741Z" // }, // "1.2.840.113549.1.9.4": { // "name": "messageDigest", // "digest": "JJZt41Nt8VsYahP+Xti4rR3vBDkUfRd6gquItl6R5Os=" // }, // "1.2.840.113549.1.9.16.2.47": { // "name": "signingCertificateV2", // "der": "MIGIMIGFMIGCBCBJrxOU0w0dWGsVovjLv9QDH3syB5mLVv3grSYA40x9IDBeMFOkUTBPMQswCQYDVQQGEwJGUjENMAsGA1UEChMERVRTSTEcMBoGA1UECwwTUGx1Z3Rlc3RzXzIwMTMtMjAxNDETMBEGA1UEAxMKTGV2ZWxCQ0FPSwIHANy4FGeM2w==" // } // }, // "unauthAttr": { // "1.2.840.113549.1.9.16.2.14": { // "name": "timestampToken", // "der": "MIIL+AYJKoZI...u7CfcjURNTY=", // "verify": { // "digestAlgorithms": [ // "sha256" // ], // "signerInfo": [ // { // "cert": { // "serialNumber": "01AA4592D36C61", // "issuerCN": "RootCAOK", // "issuerDN": "", // "digestAlgOid": "2.16.840.1.101.3.4.2.1", // "digestAlgName": "SHA256" // }, // "contentType": "1.2.840.113549.1.9.16.1.4", // "messageDigest": "NSsMUrfoyCQ0OszPE1YLx1j3EyyCiBmnE5Sua6ghu/Q=", // "signingAlgOid": "1.2.840.113549.1.1.1", // "signingAlgName": "RSA-PKCSV-1_5", // "authAttr": { // "1.2.840.113549.1.9.3": { // "name": "contentType", // "oid": "1.2.840.113549.1.9.16.1.4" // }, // "1.2.840.113549.1.9.4": { // "name": "messageDigest", // "digest": "NSsMUrfoyCQ0OszPE1YLx1j3EyyCiBmnE5Sua6ghu/Q=" // }, // "1.2.840.113549.1.9.16.2.47": { // "name": "signingCertificateV2", // "der": "MIGGMIGDMIGABCDB/np5UxvhcPnSxD2Kme+C88uXGCMWLAvFPHNvTApTWDBcMFGkTzBNMQswCQYDVQQGEwJGUjENMAsGA1UEChMERVRTSTEcMBoGA1UECwwTUGx1Z3Rlc3RzXzIwMTMtMjAxNDERMA8GA1UEAxMIUm9vdENBT0sCBwGqRZLTbGE=" // } // } // } // ] // }, // "timestampSignatureVerified": true, // "tstInfo": { // "tsaPolicyId": "1.3.6.1.4.1.2706.2.2.5.2.1.1.1", // "messageImprint": { // "hashAlg": "sha256", // "digest": "C8xEe9NA4X1cUyHGX9zG89ipmQ2byFs3aa+Xe4Fz2P0=", // "digestMatches": true // }, // "serialNumber": "313E162121D922", // "genTime": "20131203065742Z" // } // } // } // } // ] // } // } // } // var i int var count_i int var strVal *string = new(string) var certSerialNumber *string = new(string) var certIssuerCN *string = new(string) var certIssuerDN *string = new(string) var certDigestAlgOid *string = new(string) var certDigestAlgName *string = new(string) var contentType *string = new(string) signingTime := chilkat.NewDtObj() 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) authAttrSigningTimeUtctime := chilkat.NewDtObj() var authAttrMessageDigestName *string = new(string) var authAttrMessageDigestDigest *string = new(string) var authAttrSigningCertificateV2Name *string = new(string) var authAttrSigningCertificateV2Der *string = new(string) var unauthAttrTimestampTokenName *string = new(string) var unauthAttrTimestampTokenDer *string = new(string) var unauthAttrTimestampTokenTimestampSignatureVerified bool var unauthAttrTimestampTokenTstInfoTsaPolicyId *string = new(string) var unauthAttrTimestampTokenTstInfoMessageImprintHashAlg *string = new(string) var unauthAttrTimestampTokenTstInfoMessageImprintDigest *string = new(string) var unauthAttrTimestampTokenTstInfoMessageImprintDigestMatches bool var unauthAttrTimestampTokenTstInfoSerialNumber *string = new(string) unauthAttrTimestampTokenTstInfoGenTime := chilkat.NewDtObj() var j int var count_j int // Iterate over the hash algorithms used in the signature. 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 } // For each signer... i = 0 count_i = json.SizeOfArray("pkcs7.verify.signerInfo") for i < count_i { json.SetI(i) // Get information about the certificate used by this signer. certSerialNumber = json.StringOf("pkcs7.verify.signerInfo[i].cert.serialNumber") certIssuerCN = json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerCN") certIssuerDN = json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerDN") certDigestAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid") certDigestAlgName = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName") // Get additional information for this signer, such as the signingTime, signature algorithm, etc. 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") // -------------------------------- // Examine authenticated attributes. // -------------------------------- // contentType if json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\"") == true { 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") } // signingTime if json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\"") == true { 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) } // messageDigest if json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\"") == true { 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") } // signingCertificateV2 if json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\"") == true { authAttrSigningCertificateV2Name = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".name") authAttrSigningCertificateV2Der = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".der") } // -------------------------------- // Examine unauthenticated attributes. // -------------------------------- // timestampToken (the timestampToken is what makes this signature a CAdES-T) if json.HasMember("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\"") == true { unauthAttrTimestampTokenName = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".name") unauthAttrTimestampTokenDer = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".der") // This is where we find out if the timestampToken's signature is valid. unauthAttrTimestampTokenTimestampSignatureVerified = json.BoolOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".timestampSignatureVerified") unauthAttrTimestampTokenTstInfoTsaPolicyId = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.tsaPolicyId") unauthAttrTimestampTokenTstInfoMessageImprintHashAlg = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.messageImprint.hashAlg") unauthAttrTimestampTokenTstInfoMessageImprintDigest = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.messageImprint.digest") // Here is where we check to see if the digest in the timestampToken's messageImprint matches the digest of the signature of this signerInfo unauthAttrTimestampTokenTstInfoMessageImprintDigestMatches = json.BoolOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.messageImprint.digestMatches") unauthAttrTimestampTokenTstInfoSerialNumber = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.serialNumber") // Here is where we get the date/time of the timestampToken (i.e. when it was timestamped) json.DtOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.genTime",false,unauthAttrTimestampTokenTstInfoGenTime) // The following code gets details about the validity of the timestampToken's signature... j = 0 count_j = json.SizeOfArray("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.digestAlgorithms") for j < count_j { json.SetJ(j) strVal = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.digestAlgorithms[j]") j = j + 1 } j = 0 count_j = json.SizeOfArray("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo") for j < count_j { json.SetJ(j) certSerialNumber = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.serialNumber") certIssuerCN = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.issuerCN") certIssuerDN = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.issuerDN") certDigestAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.digestAlgOid") certDigestAlgName = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.digestAlgName") contentType = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].contentType") messageDigest = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].messageDigest") signingAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].signingAlgOid") signingAlgName = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].signingAlgName") authAttrContentTypeName = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.3\".name") authAttrContentTypeOid = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.3\".oid") authAttrMessageDigestName = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.4\".name") authAttrMessageDigestDigest = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.4\".digest") authAttrSigningCertificateV2Name = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.16.2.47\".name") authAttrSigningCertificateV2Der = json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.16.2.47\".der") j = j + 1 } } i = i + 1 } if success != true { fmt.Println(crypt.LastErrorText()) fmt.Println("CAdES-T verification failed.") } else { fmt.Println("CAdES-T signature is valid.") } json.DisposeJsonObject() crypt.DisposeCrypt2() cmsOptions.DisposeJsonObject() signingTime.DisposeDtObj() authAttrSigningTimeUtctime.DisposeDtObj() unauthAttrTimestampTokenTstInfoGenTime.DisposeDtObj() |
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