How to compute SHA1 digest for NSString?
//
// NSString+Hashing.h
#import <Foundation/Foundation.h>
@interface NSString (Hashing)
– (NSString *)sha1;
@end
//
// NSString+Hashing.m
#import "NSString+Hashing.h"
#import <CommonCrypto/CommonDigest.h>
@implementation NSString (Hashing)
– (NSString *)sha1 {
NSData *data = [self dataUsingEncoding: NSUTF8StringEncoding];
uint8_t digest[CC_SHA1_DIGEST_LENGTH];
CC_SHA1(data.bytes, data.length, digest);
NSMutableString *output = [NSMutableString stringWithCapacity: CC_SHA1_DIGEST_LENGTH * 2];
for (int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++) {
[output appendFormat: @"%02x", digest[i]];
}
return output;
}
@end
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