diff options
| author | weidai <weidai11@users.noreply.github.com> | 2009-03-12 11:24:12 +0000 |
|---|---|---|
| committer | weidai <weidai11@users.noreply.github.com> | 2009-03-12 11:24:12 +0000 |
| commit | 2779fc60506e2042ab1569ffad4061f1187d186c (patch) | |
| tree | 68edc0bccf003f5615716b3ae2d6b97067af39c4 /eax.cpp | |
| parent | 64af4560dc8ba66ef0e2ac3b05dec6f445ec96fe (diff) | |
| download | cryptopp-git-2779fc60506e2042ab1569ffad4061f1187d186c.tar.gz | |
- add EAX mode, XSalsa20
- speed up GCM key setup
- wipe stack in AES assembly code
- speed up CFB mode
Diffstat (limited to 'eax.cpp')
| -rw-r--r-- | eax.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/eax.cpp b/eax.cpp new file mode 100644 index 00000000..cf836632 --- /dev/null +++ b/eax.cpp @@ -0,0 +1,59 @@ +// eax.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+#include "eax.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void EAX_Base::SetKeyWithoutResync(const byte *userKey, size_t keylength, const NameValuePairs ¶ms)
+{
+ AccessMAC().SetKey(userKey, keylength, params);
+ m_buffer.New(2*AccessMAC().TagSize());
+}
+
+void EAX_Base::Resync(const byte *iv, size_t len)
+{
+ MessageAuthenticationCode &mac = AccessMAC();
+ unsigned int blockSize = mac.TagSize();
+
+ memset(m_buffer, 0, blockSize);
+ mac.Update(m_buffer, blockSize);
+ mac.CalculateDigest(m_buffer+blockSize, iv, len);
+
+ m_buffer[blockSize-1] = 1;
+ mac.Update(m_buffer, blockSize);
+
+ m_ctr.SetCipherWithIV(AccessMAC().AccessCipher(), m_buffer+blockSize, blockSize);
+}
+
+size_t EAX_Base::AuthenticateBlocks(const byte *data, size_t len)
+{
+ AccessMAC().Update(data, len);
+ return 0;
+}
+
+void EAX_Base::AuthenticateLastHeaderBlock()
+{
+ assert(m_bufferedDataLength == 0);
+ MessageAuthenticationCode &mac = AccessMAC();
+ unsigned int blockSize = mac.TagSize();
+
+ mac.Final(m_buffer);
+ xorbuf(m_buffer+blockSize, m_buffer, blockSize);
+
+ memset(m_buffer, 0, blockSize);
+ m_buffer[blockSize-1] = 2;
+ mac.Update(m_buffer, blockSize);
+}
+
+void EAX_Base::AuthenticateLastFooterBlock(byte *tag, size_t macSize)
+{
+ assert(m_bufferedDataLength == 0);
+ MessageAuthenticationCode &mac = AccessMAC();
+ unsigned int blockSize = mac.TagSize();
+
+ mac.TruncatedFinal(m_buffer, macSize);
+ xorbuf(tag, m_buffer, m_buffer+blockSize, macSize);
+}
+
+NAMESPACE_END
|