## Application accessing 'ex_kusage' ##

[Narayana, Sunil Kumar]

Hi ,
                We are porting our Application from  openssl 1.0.1 to openssl 3.0. in related to this activity we require to access the variable 'ex_kusage' pointed by X509
But there are no set utilities available to access this variable. Only  X509_get_key_usage Is available.

Our code for 1.0.1 is as below. Please suggest the right way to achieve this.

    ASN1_BIT_STRING *usage;
662     x509->ex_kusage = 0;
663
664     if((usage=(ASN1_BIT_STRING *)X509_get_ext_d2i(x509, NID_key_usage, NULL, NULL)))
665     {
666         if(usage->length > 0)
667         {
668             x509->ex_kusage = usage->data[0];
669             if(usage->length > 1)
670                 x509->ex_kusage |= usage->data[1] << 8;
671         }
672         else
673             x509->ex_kusage = 0;
674         ASN1_BIT_STRING_free(usage);
675     }

Regards,
Sunil


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