Hi, 1. what are these h0....h4 ? 2. How are they generated ? 3. Could you help to locate code in openssl ? typedef struct SHAstate_st { SHA_LONG h0, h1, h2, h3, h4; SHA_LONG Nl, Nh; SHA_LONG data[SHA_LBLOCK]; unsigned int num; } SHA_CTX; Thanks,,