openssl_encrypt(): Unknown cipher algorithm
时间: 2024-02-03 19:13:42 浏览: 48
这个错误通常是由于使用了未知的加密算法导致的。请确保您正在使用支持的加密算法,并且已正确安装了 OpenSSL 扩展。
可以通过以下步骤解决此问题:
1. 确认您的 OpenSSL 扩展已正确安装并启用。您可以在 php.ini 文件中找到它,并确保以下行没有被注释掉:
```
extension=openssl
```
2. 确认您正在使用支持的加密算法。您可以在 PHP 文档中查找 OpenSSL 支持的加密算法列表。
3. 如果您使用的是自定义加密算法,请确保它已正确实现并注册到 OpenSSL 中。您可以参考 OpenSSL 文档以了解如何实现自定义算法。
4. 如果您仍然遇到问题,请尝试升级您的 OpenSSL 版本或使用其他加密算法。
相关问题
openssl 3 aes
OpenSSL is a widely-used open-source software library that provides cryptographic functions, including support for AES (Advanced Encryption Standard). AES is a symmetric encryption algorithm that is commonly used to secure data transmission and storage.
To use AES in OpenSSL 3, you can make use of the EVP (Envelope Encryption) API. Here is an example of how to encrypt and decrypt data using AES in OpenSSL 3:
```c
#include <openssl/evp.h>
// Function to encrypt data using AES
void aes_encrypt(const unsigned char *plaintext, int plaintext_len, const unsigned char *key,
const unsigned char *iv, unsigned char *ciphertext) {
EVP_CIPHER_CTX *ctx;
int len;
int ciphertext_len;
// Create and initialize the context
ctx = EVP_CIPHER_CTX_new();
EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, key, iv);
// Encrypt the plaintext
EVP_EncryptUpdate(ctx, ciphertext, &len, plaintext, plaintext_len);
ciphertext_len = len;
// Finalize the encryption
EVP_EncryptFinal_ex(ctx, ciphertext + len, &len);
ciphertext_len += len;
// Clean up
EVP_CIPHER_CTX_free(ctx);
}
// Function to decrypt data using AES
void aes_decrypt(const unsigned char *ciphertext, int ciphertext_len, const unsigned char *key,
const unsigned char *iv, unsigned char *plaintext) {
EVP_CIPHER_CTX *ctx;
int len;
int plaintext_len;
// Create and initialize the context
ctx = EVP_CIPHER_CTX_new();
EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, key, iv);
// Decrypt the ciphertext
EVP_DecryptUpdate(ctx, plaintext, &len, ciphertext, ciphertext_len);
plaintext_len = len;
// Finalize the decryption
EVP_DecryptFinal_ex(ctx, plaintext + len, &len);
plaintext_len += len;
// Clean up
EVP_CIPHER_CTX_free(ctx);
}
```
In this example, AES-256 in CBC (Cipher Block Chaining) mode is used. You need to include the `openssl/evp.h` header and link against the OpenSSL library when compiling your code. Remember to handle key management, initialization vector (IV), and other aspects of encryption and decryption as required for your specific use case.
Please note that this example showcases how to use OpenSSL 3's EVP API for AES encryption and decryption. The exact implementation details may vary depending on your specific needs and the version of OpenSSL you are using. Therefore, it is important to consult the OpenSSL documentation and refer to the specific version you are working with for accurate usage instructions.
要求url链接加密后可以解密
好的,以下是一个可以加密和解密长链接的 PHP 代码示例:
```php
// 待加密的长链接
$url = "https://www.example.com/longurl";
// 密钥,需要保密
$key = "mysecretkey";
// 加密算法,这里使用 AES-128-CBC
$algorithm = "aes-128-cbc";
// 生成随机向量
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($algorithm));
// 加密长链接
$encrypted_url = openssl_encrypt($url, $algorithm, $key, OPENSSL_RAW_DATA, $iv);
// 将向量和密文合并成一个字符串
$encrypted_data = base64_encode($iv . $encrypted_url);
// 输出加密后的结果
echo "加密后的链接:" . $encrypted_data . "\n";
// 解密链接
$encrypted_data = base64_decode($encrypted_data);
$iv_length = openssl_cipher_iv_length($algorithm);
$iv = substr($encrypted_data, 0, $iv_length);
$encrypted_url = substr($encrypted_data, $iv_length);
// 解密长链接
$decrypted_url = openssl_decrypt($encrypted_url, $algorithm, $key, OPENSSL_RAW_DATA, $iv);
// 输出解密后的结果
echo "解密后的链接:" . $decrypted_url;
```
以上代码中,我们首先使用随机向量和密钥对长链接进行 AES-128-CBC 加密,并将向量和密文合并成一个字符串,最后输出加密后的结果。然后再将加密后的字符串进行解密,先将其进行 Base64 解码,然后将向量和密文分离,并使用相同的密钥和向量进行解密,最终输出解密后的链接。需要注意的是,解密时需要使用相同的密钥和加密时使用的算法、向量等参数,否则无法正确解密。