sha_block
#ifndef sha_block
sha_block(c,p,64);
sha_block(c,(u_int32_t *)data,sw);
sha_block(c,p,64);
sha_block(c,p,64);
sha_block(c,p,64);
sha_block(c,p,64);
void sha_block(SHA_CTX *c, const u_int32_t *p, int num);
void sha_block();