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| author | Jeffrey Walton <noloader@gmail.com> | 2015-11-05 01:59:46 -0500 |
|---|---|---|
| committer | Jeffrey Walton <noloader@gmail.com> | 2015-11-05 01:59:46 -0500 |
| commit | 48809d4e85c125814425c621d8d0d89f95405924 (patch) | |
| tree | 1010fd16c4b1199f3d27dd726dda241a2bd29f83 /emsa2.cpp | |
| parent | 025337a94aceb75d188149db70c2094673772816 (diff) | |
| download | cryptopp-git-48809d4e85c125814425c621d8d0d89f95405924.tar.gz | |
CRYPTOPP 5.6.3 RC6 checkin
Diffstat (limited to 'emsa2.cpp')
| -rw-r--r-- | emsa2.cpp | 70 |
1 files changed, 35 insertions, 35 deletions
@@ -1,35 +1,35 @@ -// emsa2.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" -#include "emsa2.h" -#include "trap.h" - -#ifndef CRYPTOPP_IMPORTS - -NAMESPACE_BEGIN(CryptoPP) - -void EMSA2Pad::ComputeMessageRepresentative(RandomNumberGenerator &rng, - const byte *recoverableMessage, size_t recoverableMessageLength, - HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty, - byte *representative, size_t representativeBitLength) const -{ - CRYPTOPP_ASSERT(representativeBitLength >= MinRepresentativeBitLength(hashIdentifier.second, hash.DigestSize())); - - if (representativeBitLength % 8 != 7) - throw PK_SignatureScheme::InvalidKeyLength("EMSA2: EMSA2 requires a key length that is a multiple of 8"); - - size_t digestSize = hash.DigestSize(); - size_t representativeByteLength = BitsToBytes(representativeBitLength); - - representative[0] = messageEmpty ? 0x4b : 0x6b; - memset(representative+1, 0xbb, representativeByteLength-digestSize-4); // pad with 0xbb - byte *afterP2 = representative+representativeByteLength-digestSize-3; - afterP2[0] = 0xba; - hash.Final(afterP2+1); - representative[representativeByteLength-2] = *hashIdentifier.first; - representative[representativeByteLength-1] = 0xcc; -} - -NAMESPACE_END - -#endif +// emsa2.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+#include "emsa2.h"
+
+#ifndef CRYPTOPP_IMPORTS
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void EMSA2Pad::ComputeMessageRepresentative(RandomNumberGenerator& /*rng*/,
+ const byte* recoverableMessage, size_t recoverableMessageLength,
+ HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
+ byte *representative, size_t representativeBitLength) const
+{
+ CRYPTOPP_UNUSED(recoverableMessage), CRYPTOPP_UNUSED(recoverableMessageLength), CRYPTOPP_UNUSED(representativeBitLength);
+ assert(representativeBitLength >= MinRepresentativeBitLength(hashIdentifier.second, hash.DigestSize()));
+
+ if (representativeBitLength % 8 != 7)
+ throw PK_SignatureScheme::InvalidKeyLength("EMSA2: EMSA2 requires a key length that is a multiple of 8");
+
+ size_t digestSize = hash.DigestSize();
+ size_t representativeByteLength = BitsToBytes(representativeBitLength);
+
+ representative[0] = messageEmpty ? 0x4b : 0x6b;
+ memset(representative+1, 0xbb, representativeByteLength-digestSize-4); // pad with 0xbb
+ byte *afterP2 = representative+representativeByteLength-digestSize-3;
+ afterP2[0] = 0xba;
+ hash.Final(afterP2+1);
+ representative[representativeByteLength-2] = *hashIdentifier.first;
+ representative[representativeByteLength-1] = 0xcc;
+}
+
+NAMESPACE_END
+
+#endif
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