Add a define WOLFSSL_CHECK_MEM_ZERO to turn on code that checks that
memory that must be zeroized before going out of use is zero.
Everytime sensitive data is put into a allocated buffer or stack buffer;
the address, its length and a name is stored to be checked later.
Where the stack buffer is about to go out of use, a call is added to
check that the required parts are zero.
wc_MemZero_Add() adds an address with length and name to a table of
addressed to be checked later.
wc_MemZero_Check() checks that the memory associated with the address is
zeroized where required.
mp_memzero_add() adds mp_int's data pointer with length and name to
table.
mp_memzero_check() checks that the data pointer is zeroized where
required.
Freeing memory will check the address. The length was prepended on
allocation.
Realloction was changed for WOLFSSL_CHECK_MEM_ZERO to perform an
allocate, check, copy, free.
the condition to perform the small key test. The small key is
mathematically valid, but does not necessarily pass the SP 800-56Ar3
test for DH keys. The most recent FIPS build will add the tested file.
This change is only used in the older FIPS releases and in some rare
configurations that include the small key test.
These changes fix several fuzz testing reports. (ZD 11088 and ZD 11101)
1. In GetDhPublicKey(), the DH Pubkey is owned by the SSL session. It
doesn't need to be in the check for weOwnDh before freeing. There
could be a chance it leaks.
2. In GeneratePublicDh() and GeneratePrivateDh(), the size of the
destination buffer should be stored at the location pointed to by the
size pointer. Check that before writing into the destination buffer.
3. Ensure the size of the private and public key values are in the size
value before generating or getting the DH keys.
* Added TLS v1.3 sniffer support using static ephemeral key.
* Add support for using a static ephemeral DH and ECC keys with TLS v1.3 using `WOLFSSL_STATIC_EPHEMERAL`.
* Adds new API's `wolfSSL_CTX_set_ephemeral_key` and `wolfSSL_set_ephemeral_key`.
* Expanded TLS extension support in sniffer.
* Refactor of the handshake hashing code.
* Added parameter checking to the TLS v1.3 key derivations (protects use of "DoTls13Finished" if handshake resources have been free'd).
* Added support for loading DH keys via `wc_DhImportKeyPair` and `wc_DhExportKeyPair`, enabled with `WOLFSSL_DH_EXTRA`.
* Added sniffer documentation `sslSniffer/README.md`.
This allows SP to support:
- DH parameter checking
- DH parameter generation
- RSA key generation
Improved performance of sp_mod operation.
Reworked some functions to have one exit point (return statement).
Fixed sp_sub_d().
Changed tests to perform 2048-bit RSA key generation only when using SP
math.
Fixed Intel x86_64 C file to not have DH specific functions available
unless WOLFSSL_HAVE_SP_DH is defined.
Fixed tfm to return an error when t is not the correct size in
fp_isprime_ex().
Sean Parkinson
Jacob Barthelmeh
Daniel Pouzzner
David Garske
John Safranek
toddouska
Juliusz Sosinowicz
Stanislav Klima
Carie Pointer
Chris Conlon
Eric Blankenhorn
Martin Kinčl