c - 从证书以ASN.1格式获取DN(Get DN from certificate in ASN.1 format)

Question

I'm trying to get the DN from a certificate in ASN.1/DER format.

(我正在尝试从ASN.1 / DER格式的证书获取DN。)

I have searched OpenSSL but still cannot find the exact function to get the DN.

(我已经搜索过OpenSSL，但仍然找不到确切的功能来获取DN。)

Does anyone have any experience regarding this or can point me to books or any website?

(是否有人对此有任何经验，或者可以将我指向书籍或任何网站？)

  ask by Acan1234 translate from so

Answer 1

I already found a way to do this.

(我已经找到了一种方法。)

I just put here if anyone want to do the same.

(如果有人要这样做，我就放在这里。)

X509_NAME * cert_entry = X509_get_issuer_name(cert);    
unsigned char buff[100] = {0};
unsigned char * p = buff;
int i = i2d_X509_NAME(cert_entry,&p);

for(int b = 0;b<i;b++)
{       
    printf("%02X ",buff[b]);
}

This will print an hexa format.

(这将打印六进制格式。)