我在使用以下代码时遇到段错误。我很确定这是因为函数试图使用变量的地址而不是它的值。我对指针有点陌生。
int main(int argc, char *argv[])
{
EVP_PKEY priv_key_p;
X509_REQ req_p;
X509 cert;
PKCS7 pkcs7;
/*Need to store value in req_p and priv_key_p*/
makecsr(&req_p, &priv_key_p, passphrase);
/*Need to use value of req_p and priv_key_p*/
create_cert(&req_p, &cert, &priv_key_p, passphrase);
}
int create_cert(X509_REQ *req_p, X509 *cert, EVP_PKEY *priv_key_p, char *passphrase)
{
int i;
long serial = 1;
EVP_PKEY *pkey;
const EVP_MD *digest;
X509_NAME *name;
X509V3_CTX ctx;
/* verify signature on the request */
if (!(pkey = X509_REQ_get_pubkey (req_p))) <--- Segmentation fault here!
int_error ("Error getting public key from request");
....
}
使用GDB,makecsr执行后,我可以毫无问题地打印priv_key_p和req_p的值。
但是,在 create_cert 函数内部,我只能通过写入 p *priv_key_p/*req_p 来打印该值
错误
Program received signal SIGSEGV, Segmentation fault.
0xb7ebb747 in X509_REQ_get_pubkey ()
from /lib/i386-linux-gnu/libcrypto.so.1.0.0
最佳答案
你的代码:
if (!(pkey = X509_REQ_get_pubkey (req_p))) <--- Segementation fault here!
int_error ("Error getting public key from request");
....
试试这个:
if (!(pkey == X509_REQ_get_pubkey (req_p))) <--- Segementation fault here!
int_error ("Error getting public key from request");
....
关于c - 尝试检索值时,将指针传递给函数会导致段错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19293735/