[Bug 21443] CryptSignHash() fails when CryptCreateHash() ALG_ID is set to CALG_SSL3_SHAMD5

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=21443





--- Comment #5 from Kenneth Robinette <support at securenetterm.com>  2010-03-11 19:47:32 ---
(In reply to comment #4)
> Actually, I'm not sure that the line you highlighted is in error.  It needs
> tests to determine the correct behavior.  As Microsoft states in MSDN at
> "Creating a CALG_SSL3_SHAMD5 Hash" [1],
> 
> 3. Get a handle to a hash object by calling CryptCreateHash with
> CALG_SSL3_SHAMD5 passed in the Algid parameter.
> 4. Set the hash value with a call to CryptSetHashParam. The concatenated hash
> values are passed as a BYTE* in the pbData parameter, and the HP_HASHVAL value
> must be passed in the dwParam parameter. Calling CryptHashData using the handle
> returned by CryptCreateHash in step 3 will fail.
> 
> This is indeed what the OpenSSL source does:  it calls CryptCreateHash,
> CryptSetHashParam, and CryptSignHash, but not CryptHashData.  Internally,
> Wine's CPSignHash doesn't call CPHashData, either.
> 
> I think the more likely source of the problem is in build_hash_signature:
> http://source.winehq.org/git/wine.git/?a=blob;f=dlls/rsaenh/rsaenh.c;h=665bc40056f1a31be9599e90105bf186b49c3cf0;hb=a72eb123e5855ff22e49058cb4e8f2200b4c16df#l1426
> 
> aOIDDescriptor has implementations for CALG_MD2, CALG_MD4, CALG_MD5, and
> CALG_SHA, but not for CALG_SSL3_SHAMD5.  Likewise, encrypt_block_impl doesn't
> have an implementation for CALG_SSL3_SHAMD5.
> 
> [1] Assuming MSDN doesn't go breaking its links again,
> http://msdn.microsoft.com/en-us/library/aa379865(VS.85).aspx

Yea, I went down the wrong path trying to trace the source of the problem.  The
code I have that is failing does not call CryptHashData().  However, you can
duplicate the problem using the OpenSSL test case I documented in my
attachment.

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