aboutsummaryrefslogtreecommitdiffstats
path: root/src/mac/cbc_mac/cbc_mac.cpp
diff options
context:
space:
mode:
authorlloyd <[email protected]>2008-09-28 19:29:24 +0000
committerlloyd <[email protected]>2008-09-28 19:29:24 +0000
commit9bcfe627321ddc81691b835dffaa6324ac4684a4 (patch)
treefe5e8ae9813b853549558b59833022e87e83981b /src/mac/cbc_mac/cbc_mac.cpp
parent9822a701516396b7de4e41339faecd48ff8dc8ff (diff)
Move all modules into src/ directory
Diffstat (limited to 'src/mac/cbc_mac/cbc_mac.cpp')
-rw-r--r--src/mac/cbc_mac/cbc_mac.cpp109
1 files changed, 109 insertions, 0 deletions
diff --git a/src/mac/cbc_mac/cbc_mac.cpp b/src/mac/cbc_mac/cbc_mac.cpp
new file mode 100644
index 000000000..d5275b0ed
--- /dev/null
+++ b/src/mac/cbc_mac/cbc_mac.cpp
@@ -0,0 +1,109 @@
+/*************************************************
+* CBC-MAC Source File *
+* (C) 1999-2007 Jack Lloyd *
+*************************************************/
+
+#include <botan/cbc_mac.h>
+#include <botan/lookup.h>
+#include <botan/xor_buf.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*************************************************
+* Update an CBC-MAC Calculation *
+*************************************************/
+void CBC_MAC::add_data(const byte input[], u32bit length)
+ {
+ u32bit 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.begin(), state.size());
+ state.clear();
+ position = 0;
+ }
+
+/*************************************************
+* CBC-MAC Key Schedule *
+*************************************************/
+void CBC_MAC::key(const byte key[], u32bit length)
+ {
+ e->set_key(key, length);
+ }
+
+/*************************************************
+* Clear memory of sensitive data *
+*************************************************/
+void CBC_MAC::clear() throw()
+ {
+ e->clear();
+ state.clear();
+ 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->name());
+ }
+
+/*************************************************
+* CBC-MAC Constructor *
+*************************************************/
+CBC_MAC::CBC_MAC(const std::string& cipher) :
+ MessageAuthenticationCode(block_size_of(cipher),
+ min_keylength_of(cipher),
+ max_keylength_of(cipher),
+ keylength_multiple_of(cipher)),
+ state(block_size_of(cipher))
+ {
+ e = get_block_cipher(cipher);
+ position = 0;
+ }
+
+/*************************************************
+* CBC-MAC Destructor *
+*************************************************/
+CBC_MAC::~CBC_MAC()
+ {
+ delete e;
+ }
+
+}