#import "CommonCrypto/CommonDigest.h"

-(NSString *)getSha1String

{

    NSData *data = http://www.mamicode.com/[self dataUsingEncoding:NSUTF8StringEncoding];

    uint8_t digest[CC_SHA1_DIGEST_LENGTH];

    CC_SHA1(data.bytes, data.length, digest);

    NSMutableString* result = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH *2];

    for(int i =0; i < CC_SHA1_DIGEST_LENGTH; i++) {

        [result appendFormat:@"%02x", digest[i]];

    }

    return result;

}

-(NSString *)getMd5String

{

    const char *cStr = [self UTF8String];

    unsigned char result[CC_MD5_DIGEST_LENGTH];

    CC_MD5(cStr, strlen(cStr), result);

    return [[NSString stringWithFormat:@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",

             result[0], result[1], result[2], result[3],

             result[4], result[5], result[6], result[7],

             result[8], result[9], result[10], result[11],

             result[12], result[13], result[14], result[15]

             ] lowercaseString];

}

iOS 中MD5和sha1加密