> I hope this question wasn't asked before. Haven't found anything. I must
>>>> calculate the RSASSA-PSS signature of a SHA3 hash. Is this supported by
>>>> CryptoPP? I only found MD5, SHA1 abd SHA2 / RSASSA-PSS.
>>>>
>>>
>>> Crypto++ does support SHA3. I believe Wei added it to the library at
>>> 5.6.2. However, we are missing OIDs for the hash when used in the signature
>>> scheme. It compiles fine, but link fails.
>>>
>>> It looks like NIST has some OIDs for the SHA-3 family at
>>> https://csrc.nist.gov/projects/computer-security-objects-register/algorithm-registration
>>>
>>> . Give us a few hours to cut them in. Then, this will work for you:
>>>
>>
>> We are tracking this at https://github.com/weidai11/cryptopp/issues/517.
>>
>
> OK, I found a reference to the SHA3 prefixes I was looking for at
> https://www.ietf.org/mail-archive/web/openpgp/current/msg08215.html. We
> should have something checked-in shortly.
>
It looks like we need this change to support the forward declarations of
SHA3 on some OS X machines. I'm going to check it in along with the other
changes.
If anyone has a problem, then please let me know or add a comment to Issue
517. The OIDs and the specializations have been a mild painpoint on OS X
for some time.
Jeff
$ git diff sha3.h
diff --git a/sha3.h b/sha3.h
index abf11f4..ca08716 100644
--- a/sha3.h
+++ b/sha3.h
...
@@ -75,19 +75,31 @@ private:
//! \brief SHA3-224 message digest
//! \since Crypto++ 5.6.2
-typedef SHA3_Final<28> SHA3_224;
+// typedef SHA3_Final<28> SHA3_224;
+struct SHA3_224 : public SHA3_Final<28>
+{
+};
//! \brief SHA3-256 message digest
//! \since Crypto++ 5.6.2
-typedef SHA3_Final<32> SHA3_256;
diff --git a/sha3.h b/sha3.h
index abf11f4..ca08716 100644
--- a/sha3.h
+++ b/sha3.h
@@ -52,9 +52,9 @@ protected:
};
//! \class SHA3_224
-//! \tparam T_DigestSize controls the digest size as a template parameter
inste
ad of a per-class constant
-//! \brief SHA3-X message digest, template for more fine-grained typedefs
-//! \since Crypto++ 6.0.0
+//! \brief SHA3 message digest template
+//! \tparam T_DigestSize the size of the digest, in bytes
+//! \since Crypto++ 5.6.2
template<unsigned int T_DigestSize>
class SHA3_Final : public SHA3
{
@@ -75,19 +75,31 @@ private:
//! \brief SHA3-224 message digest
//! \since Crypto++ 5.6.2
-typedef SHA3_Final<28> SHA3_224;
+// typedef SHA3_Final<28> SHA3_224;
+struct SHA3_224 : public SHA3_Final<28>
+{
+};
//! \brief SHA3-256 message digest
//! \since Crypto++ 5.6.2
-typedef SHA3_Final<32> SHA3_256;
+// typedef SHA3_Final<32> SHA3_256;
+struct SHA3_256 : public SHA3_Final<32>
+{
+};
//! \brief SHA3-384 message digest
//! \since Crypto++ 5.6.2
-typedef SHA3_Final<48> SHA3_384;
+// typedef SHA3_Final<48> SHA3_384;
+struct SHA3_384 : public SHA3_Final<48>
+{
+};
//! \brief SHA3-512 message digest
//! \since Crypto++ 5.6.2
-typedef SHA3_Final<64> SHA3_512;
+// typedef SHA3_Final<64> SHA3_512;
+struct SHA3_512 : public SHA3_Final<64>
+{
+};
NAMESPACE_END
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