Objective-C
Objective-C
Validate CAdES-T Signature (.p7m)
See more CAdES Examples
Validates a CAdES-T CMS signature and extracts the time-stamp token and gets information about it. Also validates the time-stamp token.Chilkat Objective-C Downloads
#import <CkoCrypt2.h>
#import <CkoJsonObject.h>
#import <NSString.h>
#import <CkoDtObj.h>
BOOL success = NO;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];
// 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 retrieves and parses the last JSON data.
// 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 last JSON data.
// The detailed results of the signature validation are available in the last JSON data.
// (If the non-success return status was caused by an error such as "file not found", then the
// last JSON data would be empty.)
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[crypt GetLastJsonData: json];
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.");
}