sqlcipher C++
时间: 2023-10-20 17:08:08 浏览: 29
SQLCipher C is a library that provides an implementation of SQLite that is encrypted using industry-standard AES encryption. It is designed to be used in applications that require encryption of sensitive data stored in an SQLite database. SQLCipher C is a cross-platform library that can be used with various programming languages and operating systems. It is written in C and provides a simple API that can be used to perform common database operations such as creating tables, inserting data, and querying data. SQLCipher C is open source software and can be downloaded and used free of charge.
相关问题
C++ 调用 SQLCipher
SQLCipher是一个开源的SQLite扩展,用于提供加密的数据库功能。在C语言中,可以通过以下步骤调用SQLCipher:
1. 下载SQLCipher的库文件,并将其添加到项目中。
2. 在代码中引入SQLCipher的头文件:
```c
#include <sqlite3.h>
#include <sqlcipher/sqlite3.h>
```
3. 打开加密的数据库:
```c
sqlite3 *db;
const char* key = "mysecretkey";
int rc = sqlite3_open("mydatabase.db", &db);
// 设置加密密钥
rc = sqlite3_key(db, key, strlen(key));
```
4. 执行SQL语句:
```c
char* sql = "SELECT * FROM mytable";
sqlite3_stmt *stmt;
rc = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
while (sqlite3_step(stmt) == SQLITE_ROW) {
// 处理查询结果
}
rc = sqlite3_finalize(stmt);
```
5. 关闭数据库:
```c
rc = sqlite3_close(db);
```
以上是调用SQLCipher的基本步骤,具体的操作方式可以根据实际需求进行调整。
C++ 调用 sqlcipher
要在C中调用sqlcipher,需要使用sqlite3.h头文件中提供的API。首先,需要使用sqlite3_open函数打开数据库文件,并提供密码以打开受密码保护的数据库。然后,可以使用sqlite3_exec函数执行SQL查询。查询结果可以使用sqlite3_step函数逐行访问。最后,使用sqlite3_close函数关闭数据库连接。
以下是一个简单的示例程序:
```
#include <stdio.h>
#include <sqlite3.h>
int main(int argc, char* argv[]) {
sqlite3* db;
char* errMsg;
int rc;
// 打开数据库并提供密码
rc = sqlite3_open("test.db", &db);
rc = sqlite3_key(db, "password", strlen("password"));
// 执行查询语句
rc = sqlite3_exec(db, "SELECT * FROM users", callback, 0, &errMsg);
// 处理查询结果
int row, col;
while (sqlite3_step(stmt) == SQLITE_ROW) {
for (col = 0; col < sqlite3_column_count(stmt); col++) {
printf("%s = %s\n", sqlite3_column_name(stmt, col), sqlite3_column_text(stmt, col));
}
}
// 关闭数据库连接
sqlite3_close(db);
return 0;
}
```
注意,要使用sqlcipher,需要先安装sqlcipher库并在编译时链接该库。