Objective-C

Load a Private Key from XML Text

Demonstrates the Chilkat PrivateKey.LoadXml method, which loads a private key from XML text. The only argument is the XML string. Supported roots include RSAKeyValue, DSAKeyValue, ECCKeyValue, and Ed25519KeyValue.

Background: XML key representations such as RSAKeyValue come from the .NET/XML-DSIG world, where keys are exchanged as XML elements. This loads that form — the inverse of GetXml — which is handy for interoperating with .NET code or systems built around XML signatures. It is a plaintext format, so protect the XML like any unencrypted key material.

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Objective-C

#import <CkoPrivateKey.h>
#import <NSString.h>

BOOL success = NO;

//  Demonstrates the PrivateKey.LoadXml method, which loads a private key from XML text.  The only
//  argument is the XML string.  Supported roots include RSAKeyValue, DSAKeyValue, ECCKeyValue,
//  and Ed25519KeyValue.

CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];

//  The XML text of a private key (for example as produced by GetXml).
NSString *xmlText = @"<RSAKeyValue><Modulus>...</Modulus><Exponent>AQAB</Exponent>...</RSAKeyValue>";

success = [privKey LoadXml: xmlText];
if (success == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

NSLog(@"%@%@%@",@"Loaded a ",privKey.KeyType,@" private key.");