Commit Graph

3 Commits

Author SHA1 Message Date
slontis
bcec03c33c Fix NULL deference when validating FFC public key.
Fixes CVE-2023-0217

When attempting to do a BN_Copy of params->p there was no NULL check.
Since BN_copy does not check for NULL this is a NULL reference.

As an aside BN_cmp() does do a NULL check, so there are other checks
that fail because a NULL is passed. A more general check for NULL params
has been added for both FFC public and private key validation instead.

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
2023-02-07 17:05:10 +01:00
Pauli
5357c10624 ffc: add _ossl to exported but internal functions
The functions updated are:
    ffc_generate_private_key, ffc_named_group_from_uid,
    ffc_named_group_to_uid, ffc_params_FIPS186_2_gen_verify,
    ffc_params_FIPS186_2_generate, ffc_params_FIPS186_2_validate,
    ffc_params_FIPS186_4_gen_verify, ffc_params_FIPS186_4_generate,
    ffc_params_FIPS186_4_validate, ffc_params_cleanup, ffc_params_cmp,
    ffc_params_copy, ffc_params_enable_flags, ffc_params_flags_from_name,
    ffc_params_flags_to_name, ffc_params_fromdata,
    ffc_params_get0_pqg, ffc_params_get_validate_params,
    ffc_params_init, ffc_params_print, ffc_params_set0_j,
    ffc_params_set0_pqg, ffc_params_set_flags, ffc_params_set_gindex,
    ffc_params_set_h, ffc_params_set_pcounter, ffc_params_set_seed,
    ffc_params_set_validate_params, ffc_params_simple_validate,
    ffc_params_todata, ffc_params_validate_unverifiable_g, ffc_set_digest,
    ffc_set_group_pqg, ffc_validate_private_key, ffc_validate_public_key
    and ffc_validate_public_key_partial.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13041)
2020-10-06 09:04:19 +10:00
Shane Lontis
8083fd3a18 Add FFC param/key validation
Embed libctx in dsa and dh objects and cleanup internal methods to not pass libctx (This makes it consistent with the rsa changes)

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10910)
2020-02-16 13:03:46 +10:00