NSString分类
#import <Foundation/Foundation.h>
@interface NSString (SHA256)
- (NSString *)SHA256;
@end
#import "NSString+SHA256.h"
#import <CommonCrypto/CommonDigest.h>
@implementation NSString (SHA256)
- (NSString *)SHA256
{
const char *s = [self cStringUsingEncoding:NSASCIIStringEncoding];
NSData *keyData = [NSData dataWithBytes:s length:strlen(s)];
uint8_t digest[CC_SHA256_DIGEST_LENGTH] = {0};
CC_SHA256(keyData.bytes, (CC_LONG)keyData.length, digest);
NSData *out = [NSData dataWithBytes:digest length:CC_SHA256_DIGEST_LENGTH];
NSString *hash = [out description];
hash = [hash stringByReplacingOccurrencesOfString:@" " withString:@""];
hash = [hash stringByReplacingOccurrencesOfString:@"<" withString:@""];
hash = [hash stringByReplacingOccurrencesOfString:@">" withString:@""];
return hash;
}
@end
