Mercurial > dropbear
view libtommath/bn_mp_fwrite.c @ 1855:35d504d59c05
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]>
author | egor-duda <egor-duda@users.noreply.github.com> |
---|---|
date | Sat, 22 Jan 2022 16:53:04 +0300 |
parents | 1051e4eea25a |
children |
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#include "tommath_private.h" #ifdef BN_MP_FWRITE_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ #ifndef MP_NO_FILE mp_err mp_fwrite(const mp_int *a, int radix, FILE *stream) { char *buf; mp_err err; int len; size_t written; /* TODO: this function is not in this PR */ if (MP_HAS(MP_RADIX_SIZE_OVERESTIMATE)) { /* if ((err = mp_radix_size_overestimate(&t, base, &len)) != MP_OKAY) goto LBL_ERR; */ } else { if ((err = mp_radix_size(a, radix, &len)) != MP_OKAY) { return err; } } buf = (char *) MP_MALLOC((size_t)len); if (buf == NULL) { return MP_MEM; } if ((err = mp_to_radix(a, buf, (size_t)len, &written, radix)) != MP_OKAY) { goto LBL_ERR; } if (fwrite(buf, written, 1uL, stream) != 1uL) { err = MP_ERR; goto LBL_ERR; } err = MP_OKAY; LBL_ERR: MP_FREE_BUFFER(buf, (size_t)len); return err; } #endif #endif