providers/implementations/signature/{ec,}dsa_sig.c accept a NID_undef
digest, so to prevent SHA1 from working with ECDSA and DSA, we must
return a negative value in securitycheck.c.
Resolves: rhbz#2031742
The EVP_DigestSign API is used in TLS to compute a SHA1 HMAC, which is
OK from our point of view, but was blocked so far. Modify
0049-Selectively-disallow-SHA1-signatures.patch to check the EVP_PKEY
type for HMAC (and TLS1-PRF and HKDF), and allow SHA1 for these cases.
Note that TLS1.1 signs a MD5-SHA1 hash with a private key, which does
not work with rh-allow-sha1-signatures = no, so the minimum TLS version
will be TLS 1.2.
Resolves: rhbz#2031742
Signed-off-by: Clemens Lang <cllang@redhat.com>
