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Created September 3, 2010 20:32
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#import <Foundation/Foundation.h>
@interface NSString(Extensions)
-(NSString *) sha1Hash;
@end
#import "NSString(Extensions).h"
#import <CommonCrypto/CommonDigest.h>
@implementation NSString(Extensions)
-(NSString*) sha1Hash {
const char* cString = [self UTF8String];
unsigned char sha1Hash[CC_SHA1_DIGEST_LENGTH];
CC_SHA1(cString, strlen(cString), sha1Hash);
NSString *sha1HashString = [NSString stringWithFormat:
@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
sha1Hash[0], sha1Hash[1], sha1Hash[2], sha1Hash[3], sha1Hash[4],
sha1Hash[5], sha1Hash[6], sha1Hash[7], sha1Hash[8], sha1Hash[9],
sha1Hash[10], sha1Hash[11], sha1Hash[12], sha1Hash[13], sha1Hash[14],
sha1Hash[15], sha1Hash[16], sha1Hash[17], sha1Hash[18], sha1Hash[19]];
return [sha1HashString lowercaseString];
}
@end
#import <SenTestingKit/SenTestingKit.h>
#define HC_SHORTHAND
#import <OCHamcrest/OCHamcrest.h>
#import "NSString(Extensions).h"
@interface NSStringTests : SenTestCase
@end
@implementation NSStringTests
-(void) test_sha1_hash_of_text {
NSString* text = @"hello";
NSString* sha1Hash = [text sha1Hash];
assertThat(sha1Hash, is(equalTo(@"aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d")));
}
@end
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