[英]openSSL: how to initialize keys for public key encryption?
For using openSSL API for public key encryption, how is the key (public & private) initialized in a C program, given private key in *.key file format, and public key in *.pem file format: 对于使用openSSL API进行公共密钥加密,如何在C程序中初始化密钥(公共和私有),给定的私钥为* .key文件格式,而公钥为* .pem文件格式:
EVP_PKEY *key;
/* How is key initialized ?
*/
ctx = EVP_PKEY_CTX_new(key);
Thanks. 谢谢。
try this: 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...
}
I didnt test but should work. 我没有测试,但应该工作。
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