Set the JWE Protected Header

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetProtectedHeader, which sets the integrity-protected JWE header from a JsonObject. The header specifies the key-management algorithm (alg) and content-encryption algorithm (enc).

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

BOOL success = NO;

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

//  Build the JWE protected header.  The "alg" member names the key-management algorithm and the "enc"
//  member names the content-encryption algorithm.
CkoJsonObject *header = [[CkoJsonObject alloc] init];
[header UpdateString: @"alg" value: @"A256KW"];
[header UpdateString: @"enc" value: @"A256GCM"];

//  Set the protected header on the JWE.  The protected header is integrity-protected and applies to
//  all recipients.
success = [jwe SetProtectedHeader: header];
if (success == NO) {
    NSLog(@"%@",jwe.LastErrorText);
    return;
}

NSLog(@"%@",@"Protected header set.");