openssl_encrypt(): using an empty initialization vector (iv) is potentially - 腾讯云开发者社区

并不完美，报错了，一个warning级的错误，虽然并不影响加密和解密，但是毕竟是报错了，错误原文我复制粘贴过来，你们感受下： PHP Warning: openssl_encrypt(): Using...an empty Initialization Vector (iv) is potentially insecure and not recommended in /home/ubuntu/lab/test.php...我正在翻译的这句的时候，已经精通英语的老李在旁边跟我说“你这翻译也太硬了，要学会人性化，看好了，一看你这就是没上过全日制大学本科的恶果”： PHP警告：openssl_encrypt()：iv向量最好别是空的...$data.PHP_EOL;$enc_data = openssl_encrypt( $data, $my_method, $key, 0, $iv );echo "密文："....iv向量是什么鬼东西？

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安全篇之永强继续教你加解密：对称篇（三）

$data.PHP_EOL; $enc_data = openssl_encrypt( $data, $my_method, $key, OPENSSL_RAW_DATA ); echo "密文："....记性好的泥腿子应该想起来了，在《加解密开篇》中就是这个错误，我在此复制粘贴过来： HP Warning: openssl_encrypt(): Using an empty Initialization...Vector (iv) is potentially insecure and not recommended in /home/ubuntu/lab/test.php on line 10 PHP警告...：openssl_encrypt()：iv向量最好别是空的，不推荐这么用，而且这样并不安全～ CBC模式的原理我们也看到了，说明我们确实需要在使用CBC模式前初始化一个iv向量出来，非常的简单，我们只需要简单修改一下上面的代码...$data.PHP_EOL; $enc_data = openssl_encrypt( $data, $my_method, $key, OPENSSL_RAW_DATA, $iv ); $dec_data

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PHP的OpenSSL加密扩展学习（一）：对称加密

($algorithm); $iv = openssl_random_pseudo_bytes($ivlen); $password = openssl_encrypt($data, $algorithm..., $algorithm, $key, 0, $iv), PHP_EOL; // 测试对称加密 // Warning: openssl_encrypt(): Using an empty Initialization...Vector (iv) is potentially insecure and not recommended openssl_encrypt() 就是加密数据，它需要原文、算法和密钥三个参数，后面的参数是可选的...iv 内容。...$algorithm = 'aes-128-gcm'; $password = openssl_encrypt($data, $algorithm, $key, 0, $iv, $tags); echo

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PHP OpenSSL扩展 – 对称加密

PHP 的 OpenSSL 扩展中，对称加密的相关函数有： openssl_encrypt() openssl_decrypt() openssl_random_pseudo_bytes() openssl_get_cipher_methods...$encrypted = openssl_encrypt($data, $encryptMethod, 'secret', 0, $iv); // 解密 9....IV 是初始化向量（initialization vector）的缩写 IV 应该是随机生成的，所以代码用到了 openssl_random_pseudo_bytes() 生成 IV。...分别使用了 openssl_encrypt() 和 openssl_decrypt()。...第一个参数是输入，对 openssl_encrypt() 来说是明文串，对 openssl_decrypt() 来说是密文串第二个参数是指定加密 / 解密算法第三个参数是加密 / 解密时需要用到的密码

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C#笔记：RC4算法实现

vector (IV) for the symmetric algorithm. /// /// This property always... /// RC4 doesn't use the IV property, however the property accepts IV's ... Vector, this method will not do anything....= null && rgbIV.Length > 1) throw new CryptographicException("Invalid Initialization ...byte)i; } m_Index1 = 0; m_Index2 = 0; // randomize, using

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C++核心准则ES.23:优先使用{}初始化器语法

, there is a tradition for using {...} for a list of elements and (...) for sizes: 对于容器来讲，习惯上使用{...}表示要素列表...vector v1(10); // vector of 10 elements with the default value 0 vector v2{10}; // vector...of 1 element with the value 10 vector v3(1, 2); // vector of 1 element with the value 2 vector...member initializer (e.g., m might be a pair) // ... }; X var {}; // initialize var to be empty...Note（注意） Initialization of a variable declared using auto with a single value, e.g., {v}, had surprising

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GTSAM中ISAM2和IncrementalFixedLagSmoother说明

Cholesky is faster but potentially numerically unstable for * poorly-conditioned problems, which can...ISAM2UpdateParams { ISAM2UpdateParams() = default; /** Indices of factors to remove from system (default: empty...This error is * calculated using the following variable values: * \li Pre-existing variables will be...* delta, as computed by ISAM2::calculateEstimate(). * \li New variables will be evaluated at their initialization...FactorIndices newFactorsIndices; /** Unused keys, and indices for unused keys, * i.e., keys that are empty

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C# AES CBC PKCS7

target_link_libraries(main PRIVATE LIBDL::LIBDL LIBRT::LIBRT WINSOCK::WINSOCK civetweb::civetweb) using...System; using System.IO; using System.Security.Cryptography; using System.Text; namespace Aes_Example...This generates a new key and initialization // vector (IV)....RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = key0; rDel.IV...RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = key0; rDel.IV

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ASP.NET MVC5+EF6+EasyUI 后台管理系统（62）-EF链接串加密

} /// /// 获取向量 /// private static string IV...byte[] bKey = Encoding.UTF8.GetBytes(Key); byte[] bIV = Encoding.UTF8.GetBytes(IV...byte[] bKey = Encoding.UTF8.GetBytes(Key); byte[] bIV = Encoding.UTF8.GetBytes(IV...name="encryptStr">密文字符串 /// 解密失败时是否返回 null，false 返回 String.Empty...String.Empty : decrypt); } #endregion #region 256位AES加密算法 /// <summary

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一款实用的.NET Core加密解密工具类库

Check.Argument.IsNotEmpty(srcString, nameof(srcString)); string str_md5_out = string.Empty...">IV,requires 8 bits /// Encrypted byte array public static..., nameof(vector)); Check.Argument.IsEqualLength(vector.Length, 8, nameof(vector)); ...">IV,requires 8 bits /// Encrypted byte array public static..., nameof(vector)); Check.Argument.IsEqualLength(vector.Length, 8, nameof(vector));

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matinal：ABAP code 实现CR下载及传输

INITIALIZATION. CONCATENATE sy-sysid 'K*' INTO p_reqest. IF sy-opsys = 'Windows NT'....IMPORTING et_request_infos = request_infos EXCEPTIONS read_config_failed = 1 table_of_requests_is_empty...PERFORM copy_file USING 'data' trfile. trfile(1) = 'D'....INITIALIZATION. bl_title = 'Import queue parameters'(b01). comm_sel = 'Select co-file....= lt_tp_maintain EXCEPTIONS read_config_failed = 1 table_of_requests_is_empty = 2 OTHERS = 3.

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matinal：SAP ABAP 高级用法：写一个创建请求副本并立即释放的程序

PERFORM delete_new_request USING ls_request_to-trkorr. RAISE new_request. ENDIF....lt_request_infos EXCEPTIONS read_config_failed = 1 table_of_requests_is_empty...= * ET_DELETED_TASKS = EXCEPTIONS cts_initialization_failure...PERFORM delete_new_request USING ls_request_to-trkorr....6 user_not_owner = 7 delete_was_cancelled = 8 ordernumber_empty

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C++(STL):11---vector源码剖析

end() - begin()); } size_type capacity() const { return size_type(end_of_storage - begin()); } bool empty...end() - begin()); } size_type capacity() const { return size_type(end_of_storage - begin()); } bool empty...测试程序如下： #include #include using namespace std; int main() { std::vector...iv; iv.push_back(1); cout << iv.capacity() << endl; //1 iv.push_back(1); cout << iv.capacity() <<...测试程序如下： #include #include using namespace std; int main() { std::vector

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聊聊Jasypt的StandardPBEByteEncryptor

Initialization of a salt generator is costly, // and so default value will be applied only in initialize.../* * Perform encryption using the Cipher */ final PBEParameterSpec...This is done only // if the salt generator we are using specifies to do so....EncryptionOperationNotPossibleException(); // } // } try { // If we are using...if (usingFixedSalt) { /* * Fixed salt is being used, therefore no initialization

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聊聊Jasypt的StandardPBEByteEncryptor

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OpenCV系列(17)|人脸检测

#include #include #include using...namespace std; using namespace cv; const string WindowName = "Face Detection example"; class CascadeDetectorAdapter...{ CV_Assert(detector); } void detect(const cv::Mat &Image, std::vector...Detector.run()) { printf("Error: Detector initialization failed\n"); return 2;...} Mat ReferenceFrame; Mat GrayFrame; vector Faces;//矩形框合集 do { VideoStream

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密文反馈模式 cfb_密码术中的密文反馈（CFB）

Like cipher block chaining(cbc), ciphertext feedback(cfb) also makes use of an initialization vector...(IV) in the blocks....block to the next block of encryption with some new specifications of this feedback: first, an initial vector...The CFB mode requires an initialization vector (IV) as the initial random n-bit input block of the character...CFB模式需要初始化向量(IV)作为字符的初始随机n位输入块。 IV不必为此保密。

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对称加密和解密

在provider上指定密钥和IV，也就是它的Key属性和IV属性。...这里简单解释一下IV（Initialization vector，初始化向量），如果一个字符串（或者数据）在加密之前很多部分是重复的，比如ABCABCABC，那么加密之后尽管字符串是乱码，但相关部分也是重复的...为了解决这个问题，就引入了IV，在使用它以后，加密之后即使是重复的也被打乱了。对于特定算法，密钥和IV的值可以随意指定，但长度是固定的，通常密钥为128位或196位，IV为64位。...using (SymmetricAlgorithm provider = SymmetricAlgorithm.Create(algorithmName)) { provider.Key...clearStream = new MemoryStream()) { // 创建控制解密的流对象cryptoStream using (CryptoStream

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C++核心准则编译边学-F.16 对于输入参数来说，拷贝代价小的传值，其他传递const参照

） Reason（原因） Both let the caller know that a function will not modify the argument, and both allow initialization...const string& s); // OK: pass by reference to const; always cheap void f2(string s); // bad: potentially...本质上这个重载是一个“将要移动形式”；参考F.18 In special cases, such as multiple "input + copy" parameters, consider using...): 假设Matrix实现了移动操作（例如使用std::vector保管元素） Matrix operator+(const Matrix& a, const Matrix& b) { Matrix...Suggest using a reference to const instead. (简单)((基本准则)) 当传值的大小超过2*sizeof(void*)时，报警。建议使用const引用。

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C++0x中一些有用的新特性

Because we have stated that the type of variable is const auto&, the "initialization" involves binding... strings(42); // strings contains 42 empty strings A common early mistake among C++ programmers...(vector(42))....This description only scratches the surface: The rules for initialization and constructors have always...Although we think that the effort to make initialization more uniform will make life easier for users

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永强教你加解密：对称篇（一）

安全篇之永强继续教你加解密：对称篇（三）

PHP的OpenSSL加密扩展学习（一）：对称加密

PHP OpenSSL扩展 – 对称加密

C#笔记：RC4算法实现

C++核心准则ES.23:优先使用{}初始化器语法

GTSAM中ISAM2和IncrementalFixedLagSmoother说明

C# AES CBC PKCS7

ASP.NET MVC5+EF6+EasyUI 后台管理系统（62）-EF链接串加密

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matinal：ABAP code 实现CR下载及传输

matinal：SAP ABAP 高级用法：写一个创建请求副本并立即释放的程序

C++(STL):11---vector源码剖析

聊聊Jasypt的StandardPBEByteEncryptor

聊聊Jasypt的StandardPBEByteEncryptor

OpenCV系列(17)|人脸检测

密文反馈模式 cfb_密码术中的密文反馈（CFB）

对称加密和解密

C++核心准则编译边学-F.16 对于输入参数来说，拷贝代价小的传值，其他传递const参照

C++0x中一些有用的新特性

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