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authorlloyd <[email protected]>2014-01-10 03:41:59 +0000
committerlloyd <[email protected]>2014-01-10 03:41:59 +0000
commit6894dca64c04936d07048c0e8cbf7e25858548c3 (patch)
tree5d572bfde9fe667dab14e3f04b5285a85d8acd95 /src/lib/mac/cbc_mac
parent9efa3be92442afb3d0b69890a36c7f122df18eda (diff)
Move lib into src
Diffstat (limited to 'src/lib/mac/cbc_mac')
-rw-r--r--src/lib/mac/cbc_mac/cbc_mac.cpp105
-rw-r--r--src/lib/mac/cbc_mac/cbc_mac.h49
-rw-r--r--src/lib/mac/cbc_mac/info.txt5
3 files changed, 159 insertions, 0 deletions
diff --git a/src/lib/mac/cbc_mac/cbc_mac.cpp b/src/lib/mac/cbc_mac/cbc_mac.cpp
new file mode 100644
index 000000000..118570e72
--- /dev/null
+++ b/src/lib/mac/cbc_mac/cbc_mac.cpp
@@ -0,0 +1,105 @@
+/*
+* CBC-MAC
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/cbc_mac.h>
+#include <botan/internal/xor_buf.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*
+* Update an CBC-MAC Calculation
+*/
+void CBC_MAC::add_data(const byte input[], size_t length)
+ {
+ size_t xored = std::min(output_length() - position, length);
+ xor_buf(&state[position], input, xored);
+ position += xored;
+
+ if(position < output_length())
+ return;
+
+ e->encrypt(state);
+ input += xored;
+ length -= xored;
+ while(length >= output_length())
+ {
+ xor_buf(state, input, output_length());
+ e->encrypt(state);
+ input += output_length();
+ length -= output_length();
+ }
+
+ xor_buf(state, input, length);
+ position = length;
+ }
+
+/*
+* Finalize an CBC-MAC Calculation
+*/
+void CBC_MAC::final_result(byte mac[])
+ {
+ if(position)
+ e->encrypt(state);
+
+ copy_mem(mac, &state[0], state.size());
+ zeroise(state);
+ position = 0;
+ }
+
+/*
+* CBC-MAC Key Schedule
+*/
+void CBC_MAC::key_schedule(const byte key[], size_t length)
+ {
+ e->set_key(key, length);
+ }
+
+/*
+* Clear memory of sensitive data
+*/
+void CBC_MAC::clear()
+ {
+ e->clear();
+ zeroise(state);
+ position = 0;
+ }
+
+/*
+* Return the name of this type
+*/
+std::string CBC_MAC::name() const
+ {
+ return "CBC-MAC(" + e->name() + ")";
+ }
+
+/*
+* Return a clone of this object
+*/
+MessageAuthenticationCode* CBC_MAC::clone() const
+ {
+ return new CBC_MAC(e->clone());
+ }
+
+/*
+* CBC-MAC Constructor
+*/
+CBC_MAC::CBC_MAC(BlockCipher* e_in) :
+ e(e_in), state(e->block_size())
+ {
+ position = 0;
+ }
+
+/*
+* CBC-MAC Destructor
+*/
+CBC_MAC::~CBC_MAC()
+ {
+ delete e;
+ }
+
+}
diff --git a/src/lib/mac/cbc_mac/cbc_mac.h b/src/lib/mac/cbc_mac/cbc_mac.h
new file mode 100644
index 000000000..be25718d9
--- /dev/null
+++ b/src/lib/mac/cbc_mac/cbc_mac.h
@@ -0,0 +1,49 @@
+/*
+* CBC-MAC
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_CBC_MAC_H__
+#define BOTAN_CBC_MAC_H__
+
+#include <botan/mac.h>
+#include <botan/block_cipher.h>
+
+namespace Botan {
+
+/**
+* CBC-MAC
+*/
+class BOTAN_DLL CBC_MAC : public MessageAuthenticationCode
+ {
+ public:
+ std::string name() const;
+ MessageAuthenticationCode* clone() const;
+ size_t output_length() const { return e->block_size(); }
+ void clear();
+
+ Key_Length_Specification key_spec() const
+ {
+ return e->key_spec();
+ }
+
+ /**
+ * @param cipher the underlying block cipher to use
+ */
+ CBC_MAC(BlockCipher* cipher);
+ ~CBC_MAC();
+ private:
+ void add_data(const byte[], size_t);
+ void final_result(byte[]);
+ void key_schedule(const byte[], size_t);
+
+ BlockCipher* e;
+ secure_vector<byte> state;
+ size_t position;
+ };
+
+}
+
+#endif
diff --git a/src/lib/mac/cbc_mac/info.txt b/src/lib/mac/cbc_mac/info.txt
new file mode 100644
index 000000000..cb017e2a1
--- /dev/null
+++ b/src/lib/mac/cbc_mac/info.txt
@@ -0,0 +1,5 @@
+define CBC_MAC 20131128
+
+<requires>
+block
+</requires>