(Objective-C) Create .p7s Compliant with ICP-Brazil Digital Signature Standard

Demonstrates how to create a .p7s signature that contains a data file, which in this case is a PDF. The .p7s will be compliant with the ICP-Brazil Digital Signature Standard.

Important: This example requires Chilkat v9.5.0.92 or later.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoCrypt2.h>
#import <NSString.h>
#import <CkoBinData.h>
#import <CkoCert.h>
#import <CkoJsonObject.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];

// Any type of file can be signed.  It doesn't have to be a PDF.
NSString *inFile = @"qa_data/pdf/helloWorld.pdf";

CkoBinData *bd = [[CkoBinData alloc] init];
BOOL success = [bd LoadFile: inFile];
if (success == NO) {
    NSLog(@"%@%@",@"Failed to load ",inFile);
    return;
}

// Get the certificate we'll be using to sign.
CkoCert *cert = [[CkoCert alloc] init];

success = [cert LoadPfxFile: @"qa_data/pfx/cert_test123.pfx" password: @"test123"];
if (success == NO) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

success = [crypt SetSigningCert: cert];
if (success == NO) {
    NSLog(@"%@",crypt.LastErrorText);
    return;
}

// Set properties for signing...
crypt.HashAlgorithm = @"sha256";

CkoJsonObject *jsonSigningAttrs = [[CkoJsonObject alloc] init];
[jsonSigningAttrs UpdateInt: @"contentType" value: [NSNumber numberWithInt: 1]];
[jsonSigningAttrs UpdateInt: @"signingTime" value: [NSNumber numberWithInt: 1]];
[jsonSigningAttrs UpdateInt: @"messageDigest" value: [NSNumber numberWithInt: 1]];
[jsonSigningAttrs UpdateInt: @"signingCertificateV2" value: [NSNumber numberWithInt: 1]];

// Listed here are the currently existing profiles. (Chilkat will add additional ICP Brasil policy profiles in future versions as new ones are created.)
// See https://www.gov.br/iti/pt-br/assuntos/repositorio/artefatos-de-assinatura-digital for more information.
// 
// PA_AD_RA --> 2.16.76.1.7.1.5.1
// PA_AD_RA_v1_1 --> 2.16.76.1.7.1.5.1.1
// PA_AD_RA_v1_2 --> 2.16.76.1.7.1.5.1.2
// PA_AD_RA_v2_0 --> 2.16.76.1.7.1.5.2
// PA_AD_RA_v2_1 --> 2.16.76.1.7.1.5.2.1
// PA_AD_RA_v2_2 --> 2.16.76.1.7.1.5.2.2
// PA_AD_RA_v2_3 --> 2.16.76.1.7.1.5.2.3
// PA_AD_RA_v2_4 --> 2.16.76.1.7.1.5.2.4
// PA_AD_RB --> 2.16.76.1.7.1.1.1
// PA_AD_RB_v1_1 --> 2.16.76.1.7.1.1.1.1
// PA_AD_RB_v2_0 --> 2.16.76.1.7.1.1.2
// PA_AD_RB_v2_1 --> 2.16.76.1.7.1.1.2.1
// PA_AD_RB_v2_2 --> 2.16.76.1.7.1.1.2.2
// PA_AD_RB_v2_3 --> 2.16.76.1.7.1.1.2.3
// PA_AD_RC --> 2.16.76.1.7.1.4.1
// PA_AD_RC_v1_1 --> 2.16.76.1.7.1.4.1.1
// PA_AD_RC_v2_0 --> 2.16.76.1.7.1.4.2
// PA_AD_RC_v2_1 --> 2.16.76.1.7.1.4.2.1
// PA_AD_RC_v2_2 --> 2.16.76.1.7.1.4.2.2
// PA_AD_RC_v2_3 --> 2.16.76.1.7.1.4.2.3
// PA_AD_RT --> 2.16.76.1.7.1.2.1
// PA_AD_RT_v1_1 --> 2.16.76.1.7.1.2.1.1
// PA_AD_RT_v2_0 --> 2.16.76.1.7.1.2.2
// PA_AD_RT_v2_1 --> 2.16.76.1.7.1.2.2.1
// PA_AD_RT_v2_2 --> 2.16.76.1.7.1.2.2.2
// PA_AD_RT_v2_3 --> 2.16.76.1.7.1.2.2.3
// PA_AD_RV --> 2.16.76.1.7.1.3.1
// PA_AD_RV_v1_1 --> 2.16.76.1.7.1.3.1.1
// PA_AD_RV_v2_0 --> 2.16.76.1.7.1.3.2
// PA_AD_RV_v2_1 --> 2.16.76.1.7.1.3.2.1
// PA_AD_RV_v2_2 --> 2.16.76.1.7.1.3.2.2
// PA_AD_RV_v2_3 --> 2.16.76.1.7.1.3.2.3

// Set the policy OID and the profile name
[jsonSigningAttrs UpdateString: @"policyId.id" value: @"2.16.76.1.7.1.1.2.3"];
[jsonSigningAttrs UpdateString: @"policyId.profile" value: @"PA_AD_RB_v2_3"];

crypt.SigningAttributes = [jsonSigningAttrs Emit];

// Sign. 
success = [crypt OpaqueSignBd: bd];
if (success == NO) {
    NSLog(@"%@",crypt.LastErrorText);
    return;
}

// Save to a .p7s
success = [bd WriteFile: @"qa_output/helloWorld.pdf.p7s"];

NSLog(@"%@",@"Success");