签名： #include <string.h> #include <openssl/rsa.h> #include <openssl/pem.h> #include <openssl/err.h> #include <openssl/sha.h> #include <openssl/crypto.h> /** 参考https://blog.csdn.net/zjf535214685/article/details/82182241 */ #define PRIVATE_KEY_PATH ("./rsaprivatekey.pem") #define SHA_WHICH NID_sha256void printHex(unsigned char *md, int len) {int i = 0;for (i = 0; i < len; i++){printf("%0...