如何在iOS中添加盐并使用objective c检索它而不会造成内存泄漏

NSString *salt = [[NSUUID UUID] UUIDString];

NSString *password = @"YourPassword";
NSString *combinedString = [salt stringByAppendingString:password];

// 使用SHA256算法生成哈希值
NSData *data = [combinedString dataUsingEncoding:NSUTF8StringEncoding];
uint8_t digest[CC_SHA256_DIGEST_LENGTH];
CC_SHA256(data.bytes, (CC_LONG)data.length, digest);

NSMutableString *hashedString = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH*2];
for (int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++) {
    [hashedString appendFormat:@"%02x", digest[i]];
}

NSLog(@"Hashed password with salt: %@", hashedString);

NSString *storedSalt = @"StoredSalt"; // 从数据库或其他存储中检索盐值
NSString *storedHashedPassword = @"StoredHashedPassword"; // 从数据库或其他存储中检索哈希值

NSString *userInputPassword = @"UserInputPassword"; // 用户输入的密码

NSString *combinedString = [storedSalt stringByAppendingString:userInputPassword];

NSData *data = [combinedString dataUsingEncoding:NSUTF8StringEncoding];
uint8_t digest[CC_SHA256_DIGEST_LENGTH];
CC_SHA256(data.bytes, (CC_LONG)data.length, digest);

NSMutableString *hashedString = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH*2];
for (int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++) {
    [hashedString appendFormat:@"%02x", digest[i]];
}

if ([hashedString isEqualToString:storedHashedPassword]) {
    NSLog(@"Password is valid.");
} else {
    NSLog(@"Password is invalid.");
}