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(Chilkat2-Python) 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.
import chilkat2 # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. crypt = chilkat2.Crypt2() # Indicate that the CAdES-T timestamp tokens must also pass validation for the signature to be validated. cmsOptions = chilkat2.JsonObject() cmsOptions.UpdateBool("ValidateTimestampTokens",True) crypt.CmsOptions = 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 is a CkJsonObject json = crypt.LastJsonData() json.EmitCompact = False print(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" # } # } # } # } # ] # } # } # } # signingTime = chilkat2.DtObj() authAttrSigningTimeUtctime = chilkat2.DtObj() unauthAttrTimestampTokenTstInfoGenTime = chilkat2.DtObj() # Iterate over the hash algorithms used in the signature. i = 0 count_i = json.SizeOfArray("pkcs7.verify.digestAlgorithms") while i < count_i : json.I = i strVal = json.StringOf("pkcs7.verify.digestAlgorithms[i]") i = i + 1 # For each signer... i = 0 count_i = json.SizeOfArray("pkcs7.verify.signerInfo") while i < count_i : json.I = 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") while j < count_j : json.J = 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") while j < count_j : json.J = 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): print(crypt.LastErrorText) print("CAdES-T verification failed.") else: print("CAdES-T signature is valid.") |
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