(Objective-C) Subject Alternative Name for ICP Brasil Certs

Demonstrates how to access the multiple names contained in the Subject Alternative Name of a certificate. This example is for an ICP Brasil certificate.

For more information, see http://oidref.com/2.16.76.1.3

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

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

BOOL success = [cert LoadFromFile: @"qa_data/certs/testIcpBrasil.cer"];
if (success == NO) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

// If the cert's Subject Alternative Name contains multiple values, each specified by an OID,
// then the Rfc822Name property returns XML.
NSString *subjectAltNameXml = cert.Rfc822Name;

NSLog(@"%@",subjectAltNameXml);

// Here's a sample of the subjectAltNameXml:

// <SubjectAltName>
//     <name type="oid" oid="2.16.76.1.3.4">290999653223955019700000000000000000000150424SRJUXPTS</name>
//     <name type="oid" oid="2.16.76.1.3.2">JOAO SILVA</name>
//     <name type="oid" oid="2.16.76.1.3.3">02408939000115</name>
//     <name type="oid" oid="2.16.76.1.3.7">000000000000</name>
// </SubjectAltName>

// The XML can be parsed like this:

CkoXml *xml = [[CkoXml alloc] init];
[xml LoadXml: subjectAltNameXml];

NSString *oid = 0;
NSString *name = 0;

int i = 0;
int count_i = [[xml NumChildrenHavingTag: @"name"] intValue];
while (i < count_i) {
    xml.I = [NSNumber numberWithInt: i];
    oid = [xml ChilkatPath: @"name[i]|(oid)"];
    name = [xml GetChildContent: @"name[i]"];
    NSLog(@"%@%@%@",oid,@": ",name);
    i = i + 1;
}