iOS: Pre install SSL certificate in keychain – programmatically

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Once you have the server certificate in der format you can try the following code:

+ (void) addCertToKeychain:(NSData*)certInDer
{
    OSStatus            err = noErr;
    SecCertificateRef   cert;

    cert = SecCertificateCreateWithData(NULL, (CFDataRef) certInDer);
    assert(cert != NULL);

    CFTypeRef result;

    NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:
                          (id)kSecClassCertificate, kSecClass,
                          cert, kSecValueRef, 
                          nil];

    err = SecItemAdd((CFDictionaryRef)dict, &result);
    assert(err == noErr || err == errSecDuplicateItem);

    CFRelease(cert);
}

It will add the certificate to the keychain sandbox of your application i.e. no other application will trust your cert.

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