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对于使用 openSSL API 进行公钥加密,如何在 C 程序中初始化密钥(公钥和私钥),给定 *.key 文件格式的私钥和 *.pem 文件格式的公钥:

 EVP_PKEY *key;
 /* How is key initialized ?
  */
  ctx = EVP_PKEY_CTX_new(key);

谢谢。

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1 回答 1

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尝试这个:

        EVP_PKEY *pkey;
        FILE *f = fopen("<path for your PEM or DER encoded key>", "rb");
        if (f == NULL){
                // error handling...
        }
    //if your key is PEM encoded use this
        pkey = PEM_read_PUBKEY(f, NULL, NULL, NULL); // pkey now contains the pubKey. 
    //We are passing NULL to the others parameters because we dont need password to read a public key

    //if your key is DER encoded use this
        pkey = d2i_PUBKEY_fp(f, NULL);

        if (pkey == NULL){
                // error handling...
        }

我没有测试,但应该工作。

于 2012-04-16T16:31:39.317 回答