The SHA-1 algorithm is deprecated (particularly for security-sensitive
applications) in a variety of OS environments. This already affects
RHEL-9 and derivatives, which are not willing to use certificates using
that algorithm. The fix is to use sha256 instead, which is already used
for most of the other certificates in the test suite.
Fixes#10135
This gets rid of issues related to sha1 signatures.
Manual steps after "make clean-certs" and "make build-certs":
- Copy tests/certs/stunnel-sv.pem to tests/stunnel.pem
(make clean-certs does not remove the original tests/stunnel.pem)
- Copy tests/certs/Server-localhost-sv.pubkey-pinned into --pinnedpubkey
options of tests/data/test2041 and tests/data/test2087
Closes#10153
The previous test certificates contained RSA keys of only 1024 bits.
However, RSA claims that 1024-bit RSA keys are likely to become
crackable some time before 2010. The NIST recommends at least 2048-bit
keys for RSA for now.
Better use full 2048 also for testing.
Closes#2973
The previous test certificate contained a MD5 hash which is not
supported using TLSv1.2 with Schannel on Windows 7 or newer.
See the update to this blog post on IEInternals / MSDN:
http://blogs.msdn.com/b/ieinternals/archive/2011/03/25/
misbehaving-https-servers-impair-tls-1.1-and-tls-1.2.aspx
"Update: If the server negotiates a TLS1.2 connection with a
Windows 7 or 8 schannel.dll-using client application, and it
provides a certificate chain which uses the (weak) MD5 hash
algorithm, the client will abort the connection (TCP/IP FIN)
upon receipt of the certificate."
