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//
// OAHMAC_SHA1SignatureProvider.m
// OAuthConsumer
//
// Created by Jon Crosby on 10/19/07.
// Copyright 2007 Kaboomerang LLC. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import "OAHMAC_SHA1SignatureProvider.h"
// #include "hmac.h"
#include "Base64Transcoder.h"
#import <CommonCrypto/CommonDigest.h>
#import <CommonCrypto/CommonHMAC.h>
@implementation OAHMAC_SHA1SignatureProvider
- (NSString *)name {
return @"HMAC-SHA1";
}
- (NSString *)signClearText:(NSString *)text withSecret:(NSString *)secret {
NSData *secretData = [secret dataUsingEncoding:NSUTF8StringEncoding];
NSData *clearTextData = [text dataUsingEncoding:NSUTF8StringEncoding];
unsigned char result[CC_SHA1_DIGEST_LENGTH];
// hmac_sha1((unsigned char *)[clearTextData bytes], [clearTextData length], (unsigned char *)[secretData bytes], [secretData length], result);
CCHmac(kCCHmacAlgSHA1, (const void *)[secretData bytes], [secretData length], (const void *)[clearTextData bytes], [clearTextData length], result);
//Base64 Encoding
char base64Result[32];
size_t theResultLength = 32;
Base64EncodeData(result, 20, base64Result, &theResultLength);
NSData *theData = [NSData dataWithBytes:base64Result length:theResultLength];
NSString *base64EncodedResult = [[[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding] autorelease];
return base64EncodedResult;
}
@end
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