[gnutls-devel] GnuTLS | FIPS restrictions are not as comprehensive as one might infer from the documentation (#1039)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Wed Jun 17 16:26:59 CEST 2020

Alexander Sosedkin created an issue: https://gitlab.com/gnutls/gnutls/-/issues/1039

doc/cha-internals.texi#L691 has the following claim:

> When the FIPS140-2 mode is enabled, The operation of the library is in addition modified as follows.
> * Only approved by FIPS140-2 algorithms are enabled

As far as I understand, this is mostly true, as in, ciphers and MACs usage is restricted, but not, e.g., curve selection. But the doc text might leave the impression that the imposted restrictions are comprehensive.

I suppose that either the wording should be amended to clarify the extent of the restrictions in place, or the library behaviour should be extended to restrict more of its functionality when in FIPS mode.

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