Printing value stored in ASN1_TYPE

[Chaz.]

I needed to have a routine to convert the data stored in an ASN1_TYPE
structure to an ASCII string. After finding that no one on the net
seemed to have the answer I went and did some research. This is what I
came up with for an answer. If any one sees anything wrong with it I
would love to know about it and will make suitable adjustments. I will
probably submit the change to the OpenSSL project for hopeful inclusion.


Peace,
Chuck Wegrzyn

#include <openssl/pem.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#include <openssl/engine.h>
#include <openssl/asn1.h>

static void error(char *msg)
{
        // print out message...
        printf(msg);
        exit(1);
}

void ASN1_TYPE_print(BIO *bio,ASN1_TYPE *ptr)
{
        // memory bio to collect the output.
        char objbuf[80];
        const char *ln;

        // Collect the things from the ASN1_TYPE structure
        switch(ptr->type)
        {
                case V_ASN1_BOOLEAN:
                        BIO_puts(bio, ptr->value.boolean ? "true" : "false");
                        break;

                case V_ASN1_INTEGER:
                        BIO_puts(bio,i2s_ASN1_INTEGER(NULL,ptr->value.integer));
                        break;

                case V_ASN1_ENUMERATED:
                        
BIO_puts(bio,i2s_ASN1_INTEGER(NULL,ptr->value.enumerated));
                        break;

                case V_ASN1_NULL:
                        BIO_puts(bio,"NULL");
                        break;

                case V_ASN1_UTCTIME:
                        ASN1_UTCTIME_print(bio,ptr->value.utctime);
                        break;

                case V_ASN1_GENERALIZEDTIME:
                        
ASN1_GENERALIZEDTIME_print(bio,ptr->value.generalizedtime);
                        break;

                case V_ASN1_OBJECT:
                        ln = OBJ_nid2ln(OBJ_obj2nid(ptr->value.object));
                        if( !ln ) ln = "";
                        OBJ_obj2txt(objbuf,sizeof(objbuf),ptr->value.object,1);
                        BIO_puts(bio,objbuf);
                        break;

                default :
                        ASN1_STRING_print_ex(bio, ptr->value.visiblestring,
                                
ASN1_STRFLGS_DUMP_UNKNOWN|ASN1_STRFLGS_SHOW_TYPE);
                        break;
        }
        
}