EVP_get_cipherbyname始终返回null [英] EVP_get_cipherbyname always returns null

问题描述

在macOS上调用EVP_get_cipherbyname时遇到问题:

I have a problem when calling EVP_get_cipherbyname on macOS:

const char *cipher_str = "aes-256-cbc";
const evp_cipher_st *cipher1 = EVP_aes_256_cbc();
const evp_cipher_st *cipher2 = EVP_get_cipherbyname(cipher_str);

在上面的代码中，cipher1将始终设置为有效的evp_cipher_st *对象，而cipher2将始终为null.我还没有找到产生非null的cipher_str的单个实例.

In the code above, cipher1 will always be set to a valid evp_cipher_st * object, and cipher2 will always be null. I haven't found a single instance of cipher_str that produces a non-null cipher2.

我做错什么了吗?我还应该打电话给其他电话吗?

Am I doing something wrong? Are there some other calls I should be making to get this to work?

推荐答案

您需要先初始化OpenSSL库.如果您仅使用libcrypto， 致电:

You need to initialize the OpenSSL library first. If you just use libcrypto, call:

OpenSSL_add_all_algorithms();

请参考 https://wiki.openssl.org/index.php/Library_Initialization有关如何处理其他情况或openssl版本的信息.

Refer to https://wiki.openssl.org/index.php/Library_Initialization for how to handle other situations or openssl versions.

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