Implement server-side support for sk-ecdsa U2F-backed keys (#142) * Implement server-side support for sk-ecdsa U2F-backed keys * Fix out-of-bounds read on normal ecdsa-sha2-[identifier] keys * Fix one more potential out-of-bounds read * Check if nistp256 curve is used in sk-ecdsa-sha2- key It's the only allowed curve per PROTOCOL.u2f specification * Implement server-side support for sk-ed25519 FIDO2-backed keys * Keys with type sk-* make no sense as host keys, so they should be disabled * fix typo * Make sk-ecdsa call buf_ecdsa_verify This reduces code duplication, the SK code just handles the different message format. * Reduce sk specific code The application id can be stored in signkey, then we don't need to call sk-specific functions from svr-authpubkey * Remove debugging output, which causes compilation errors with DEBUG_TRACE disabled * Proper cleanup of sk_app Co-authored-by: Matt Johnston <[email protected]>

#ifndef DROPBEAR_DBHELPERS_H_
#define DROPBEAR_DBHELPERS_H_

/* This header defines some things that are also used by libtomcrypt/math. 
   We avoid including normal include.h since that can result in conflicting 
   definitions - only include config.h */
#include "config.h"

#ifdef __GNUC__
#define ATTRIB_PRINTF(fmt,args) __attribute__((format(printf, fmt, args))) 
#define ATTRIB_NORETURN __attribute__((noreturn))
#define ATTRIB_SENTINEL __attribute__((sentinel))
#else
#define ATTRIB_PRINTF(fmt,args)
#define ATTRIB_NORETURN
#define ATTRIB_SENTINEL
#endif

void m_burn(void* data, unsigned int len);

#endif /* DROPBEAR_DBHELPERS_H_ */