MD_5值转换

+(NSString *)getMD_5StringWithString:(NSString *)intoString{

const char *cStr = [intoString UTF8String];

unsigned char digest[CC_MD5_DIGEST_LENGTH];

CC_MD5( cStr, (int)strlen(cStr), digest);

NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];

for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)

{

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

}

return result;

}