how to convert the Certificate String into X509 structure.?

Question

can any one tell me how to convert the string content into X509 structure . i am using openssl to read the X509 Structure.

example : certificate string

Answer 1

You can use this OpenSSL code snippet to load the certificate when provided as a string input:

#include 
#include 
#include 

const unsigned char *data = 
    "-----BEGIN CERTIFICATE-----\n"
    "MIIExDCCA6ygAwIBAgIJAK0JmDc/YXWsMA0GCSqGSIb3DQEBBQUAMIGcMQswCQYD\n"
    /*...*/
    "gRQT0OIU5vXzsmhjqKoZ+dBlh1FpSOX2\n"
    "-----END CERTIFICATE-----";

BIO *bio;
X509 *certificate;

bio = BIO_new(BIO_s_mem());
BIO_puts(bio, data);
certificate = PEM_read_bio_X509(bio, NULL, NULL, NULL);

Hope this helps.