This directory in BIND contains the Domain Signature Tools (dst) library. It was written by Trusted Information Systems, Inc. and integrated into BIND by John Gilmore. It is used as a generic crypto library interface by the DNS Security code in BIND. Installing Domain Signature Tools Library - dst 1. Assess available crypto libraries: if you have DNSSAFE (the default) CRYPTFLAGS must include -DDNSSAFE CRYPTINCL must include -I../dnssafe if you have RSAREF CRYPTFLAGS must include -DRSAREF CRYPTINCL must include -I if you have BSAFE CRYPTFLAGS must include -DBSAFE CRYPTINCL must include -I if you want HMAC-MD5 support CRYPTFLAGs must include -DHMAC 2. Building BIND as usual will include the dst library routines into libbind.a, and link them into the BIND programs that use crypto support.