Build change looks good.
/Erik
On 2018-06-21 04:12, Weijun Wang wrote:
Please take a review on this change
http://cr.openjdk.java.net/~weijun/8205445/webrev.00/
and the release note at
https://bugs.openjdk.java.net/browse/JDK-8205471
The code change adds RSASSA-PSS signature support to the SunMSCAPI provider.
Several notes:
1. CryptoAPI (which SunMSCAPI is based on and now a deprecated technology) does
not support RSASSA-PSS. In fact, CNG [1] is used to perform the signing and
verification. This is certainly not a perfect solution and we are thinking of
support CNG in a more sophisticated way in future releases of JDK.
2. For unknown reason, the newly added verification code for RSASSA-PSS does
not work correctly (precisely, ::NCryptTranslateHandle returns
NTE_INVALID_PARAMETER). A fallback mechanism is added into
mscapi/RSASignature.java. A SunRsaSign Signature object is actually used when a
SunMSCAPI Signature is initialized to verify an RSASSA-PSS signature.
3. It looks like CNG only supports PSSParamterSpec with the same message hash
algorithm and MGF1 hash algorithm, because there is only one algorithm field in
BCRYPT_PSS_PADDING_INFO [2]. This is checked when setting the parameter.
4. It looks like CNG only supports RSASSA-PSS using these hash algorithms: SHA-1,
SHA-256, SHA-384, and SHA-512. This is not checked at parameter setting but sign() will
throw a SignatureException saying "Unrecognised hash algorithm". Since the
verify() side uses a fallback SunRsaSign signature, other hash algorithms are supported.
Thanks
Max
[1]
https://msdn.microsoft.com/en-us/library/windows/desktop/aa376210(v=vs.85).aspx
[2]
https://msdn.microsoft.com/en-us/library/windows/desktop/aa375529(v=vs.85).aspx
[3]
https://msdn.microsoft.com/en-us/library/windows/desktop/aa375534(v=vs.85).aspx
