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(Objective-C) 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 <CkoCrypt2.h> #import <CkoJsonObject.h> #import <NSString.h> #import <CkoDtObj.h> // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init]; BOOL success; // Indicate that the CAdES-T timestamp tokens must also pass validation for the signature to be validated. CkoJsonObject *cmsOptions = [[CkoJsonObject alloc] init]; [cmsOptions UpdateBool: @"ValidateTimestampTokens" value: YES]; 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" destPath: @"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.) CkoJsonObject *json = [crypt LastJsonData]; json.EmitCompact = NO; NSLog(@"%@",[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" // } // } // } // } // ] // } // } // } // int i; int count_i; NSString *strVal = 0; NSString *certSerialNumber = 0; NSString *certIssuerCN = 0; NSString *certIssuerDN = 0; NSString *certDigestAlgOid = 0; NSString *certDigestAlgName = 0; NSString *contentType = 0; CkoDtObj *signingTime = [[CkoDtObj alloc] init]; NSString *messageDigest = 0; NSString *signingAlgOid = 0; NSString *signingAlgName = 0; NSString *authAttrContentTypeName = 0; NSString *authAttrContentTypeOid = 0; NSString *authAttrSigningTimeName = 0; CkoDtObj *authAttrSigningTimeUtctime = [[CkoDtObj alloc] init]; NSString *authAttrMessageDigestName = 0; NSString *authAttrMessageDigestDigest = 0; NSString *authAttrSigningCertificateV2Name = 0; NSString *authAttrSigningCertificateV2Der = 0; NSString *unauthAttrTimestampTokenName = 0; NSString *unauthAttrTimestampTokenDer = 0; BOOL unauthAttrTimestampTokenTimestampSignatureVerified; NSString *unauthAttrTimestampTokenTstInfoTsaPolicyId = 0; NSString *unauthAttrTimestampTokenTstInfoMessageImprintHashAlg = 0; NSString *unauthAttrTimestampTokenTstInfoMessageImprintDigest = 0; BOOL unauthAttrTimestampTokenTstInfoMessageImprintDigestMatches; NSString *unauthAttrTimestampTokenTstInfoSerialNumber = 0; CkoDtObj *unauthAttrTimestampTokenTstInfoGenTime = [[CkoDtObj alloc] init]; int j; int count_j; // Iterate over the hash algorithms used in the signature. i = 0; count_i = [[json SizeOfArray: @"pkcs7.verify.digestAlgorithms"] intValue]; while (i < count_i) { json.I = [NSNumber numberWithInt: i]; strVal = [json StringOf: @"pkcs7.verify.digestAlgorithms[i]"]; i = i + 1; } // For each signer... i = 0; count_i = [[json SizeOfArray: @"pkcs7.verify.signerInfo"] intValue]; while (i < count_i) { json.I = [NSNumber numberWithInt: 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" bLocal: NO dt: 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\""] == YES) { 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\""] == YES) { 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" bLocal: NO dt: authAttrSigningTimeUtctime]; } // messageDigest if ([json HasMember: @"pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\""] == YES) { 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\""] == YES) { 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\""] == YES) { 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" bLocal: NO dt: 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"] intValue]; while (j < count_j) { json.J = [NSNumber numberWithInt: 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"] intValue]; while (j < count_j) { json.J = [NSNumber numberWithInt: 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 != YES) { NSLog(@"%@",crypt.LastErrorText); NSLog(@"%@",@"CAdES-T verification failed."); } else { NSLog(@"%@",@"CAdES-T signature is valid."); } |
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