hi
i am new in this
industry.
just now i have a
certificate.
the problem is how to read serial number from the
certificate.
i also have problem to
viewed X509v3 extensions, X509v3 Subject key identifier, X509v3 certificate
Policies, X509v3 Basic Constraint, and signature algorithm.
i have no idea. can any
body help me.
i have problem with this
code:
#include <stdio.h>
#include
<openssl/x509.h>
#include <openssl/pem.h>
#include
<openssl/bio.h> // MODIFICATION: bio.h needed
for BIO operations
#define
X509_get_version(x)
ASN1_INTEGER_get((x)->cert_info->version)
main()
{
X509 *x;
FILE
*fp;
EVP_PKEY *
pkey;
BIO *bp; // needed for
ASN1_TIME_print
long
version;
char * s;
if
((fp=fopen("C:\\CryptoWeb\\backup 492001\\Haizad.crt","r")) != NULL)
{
x=X509_new();
if
(PEM_read_X509(fp,&x,NULL,NULL)!=NULL)
printf("\nReading success!");
else
{
printf ("\nError
reading certificate!");
exit (1);
}
X509_print_fp(stdout,x);
printf("\nCertificate:");
printf("\n
Data:");
version = X509_get_version(x);
printf("\nVersion: %ld",version);
s = X509_get_serialNumber(x);
printf("\nSerial Number: %d\n",s);
s =
X509_get_signature_type(x);
printf("Signature Algorithm:
%1d\n",s);
s =
X509_NAME_oneline(X509_get_issuer_name(x),NULL,NULL);
printf("ISSUER
NAME:
%s\n",s);
bp=BIO_new_fp(stdout,BIO_NOCLOSE);
if(bp==NULL){
printf("Error creating
BIO.\n");
exit(1);
}
printf("\nNot Before: ");
ASN1_TIME_print(bp,X509_get_notBefore(x));
printf("\nNot After: ");
ASN1_TIME_print(bp,X509_get_notAfter(x));
s =
X509_NAME_oneline(X509_get_subject_name(x),NULL,NULL);
printf("\nSUBJECT NAME: %s\n",s);
BIO_free(bp);
/* Get public key - eay */
pkey=X509_get_pubkey(x);
if (pkey == NULL) {
printf
("\nPublic key error!");
exit (1);
}
if (pkey == NULL) {
printf ("\nPublic key is
NULL!");
exit (1);
}
else
printf ("\nPublic key found!");
printf("\nPublic
key:");
RSA_print_fp(stdout,pkey->pkey.rsa,0);
X509_free(x);
fclose(fp);
}
else
perror("ERROR,
haizad.crt");
}
please reply as soon as
possible.
