Get the JWE Protected Header

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.GetProtectedHeader, which copies the decoded shared JWE protected header into a JsonObject.

#import <CkoJwe.h>
#import <NSString.h>
#import <CkoJsonObject.h>

BOOL success = NO;

CkoJwe *jwe = [[CkoJwe alloc] init];

//  Load the JWE.
NSString *jweCompact = @"eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>";
success = [jwe LoadJwe: jweCompact];
if (success == NO) {
    NSLog(@"%@",jwe.LastErrorText);
    return;
}

//  Copy the decoded shared JWE protected header into a JsonObject.  Only the protected header is
//  returned; it is not merged with the unprotected or per-recipient headers.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
success = [jwe GetProtectedHeader: json];
if (success == NO) {
    NSLog(@"%@",jwe.LastErrorText);
    return;
}

json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);