Re: get subjectAltName

[Naveen B.N]

Resending with attachment ..

Naveen B.N wrote:

Hello,
I am using Linux.

core was generated by `./a.out'.
Program terminated with signal 11, Segmentation fault.
#0  0x058b8a03 in OBJ_cmp () from /lib/libcrypto.so.6
(gdb) bt
#0  0x058b8a03 in OBJ_cmp () from /lib/libcrypto.so.6
#1  0x0593a786 in X509v3_get_ext_by_OBJ () from /lib/libcrypto.so.6
#2  0x0593a7ce in X509v3_get_ext_by_NID () from /lib/libcrypto.so.6

#4  0x080489af in main () at find_root.c:65


Please find the code used below and certificate is attached.

Thanks and Regards
Naveen


{
    X509 *cert1=NULL;
    X509_NAME *name;

    char *test;
    int pos=0,nid;

    cert1=d2i_X509(NULL,&in,len);
    printf("\n cert=%x ", cert1);
    name=X509_get_subject_name(cert1);
    buffer=X509_NAME_oneline(name, 0, 0);
    if(strstr(buffer,"CN=kdc.globaledgesoft.com")==NULL)
        return -1;
    else

          ext=X509v3_get_ext(cert1,pos);
        if(ext!=NULL){
        test=d2i_ASN1_IA5STRING(&ext->value->data,NULL,0);
        printf("\n test =%s ", test);*
        }
        return 0;
    }
}

int main(int argc, char **argv)
{
    const unsigned char *in ;
    int len,size,ret;
    X509 *cert1=NULL;
    X509 *cert2=NULL;
    FILE   *fp;
    struct stat st;

    fp = fopen("kdc.cer","r");
    stat ( (const char *)"kdc.cer",&st);
    size = st.st_size;
    in=(unsigned char *)malloc(++size);
    printf("\n length = %d ",size);
    len=fread(in,1,size,fp);
        fclose(fp);
    printf("\n Len =%d",len);
    printf("\n cert=%x ", cert1);
    if(find_root_cert(in,len)==0)
        printf("\n This is the Root\n");
    else
        printf("\n No match was found \n");
}

/************* End ************/

I am trying to print the subjectAltName present in the certificate, but i am seeing crash in /lib/libcrypto.so.6 #3 0x08048870 in find_root_cert (in=0x9445a72 "", len=1002) at find_root.c:37 Help me to solve this issue. Please guide, if any other alternative to method to achieve the same /************ Start code ***************/int find_root_cert(char *in,int len) char *buffer; X509_EXTENSION *ext=NULL; { * nid=OBJ_sn2nid("subjectAltName"); pos=X509v3_get_ext_by_NID (cert1,OBJ_sn2nid("subjectAltName"), -1);

kdc.cer
Description: application/x509-ca-cert