(Objective-C) X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate.

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

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

CkoCert *cert = [[CkoCert alloc] init];

BOOL success;

// Load a certificate object with a certificate.
// The certificate object could have come from any source,
// or perhaps was obtained from another Chilkat function.
// The source does not matter.  What matters is that we have
// a cert object loaded with the certificate..
success = [cert LoadFromFile: @"qa_data/certs/cert_test123.cer"];
if (success != YES) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

// Get the binary DER of the certificae, and compute the SHA256 hash:
CkoBinData *bdDer = [[CkoBinData alloc] init];
[cert ExportCertDerBd: bdDer];

// Get the base64 representation of the SHA256 hash.
NSString *certHash = [bdDer GetHash: @"sha256" encoding: @"base64"];

NSLog(@"%@%@",@"Certificate hash in base64 = ",certHash);