1 files changed, 133 insertions, 0 deletions
diff --git a/src/lib/algo_base/symkey.cpp b/src/lib/algo_base/symkey.cpp
new file mode 100644
index 000000000..52b216361
--- /dev/null
+++ b/src/lib/algo_base/symkey.cpp
@@ -0,0 +1,133 @@
+/*
+* OctetString
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/symkey.h>
+#include <botan/internal/xor_buf.h>
+#include <botan/rng.h>
+#include <botan/pipe.h>
+#include <botan/hex.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*
+* Create an OctetString from RNG output
+*/
+OctetString::OctetString(RandomNumberGenerator& rng,
+                         size_t length)
+   {
+   bits = rng.random_vec(length);
+   }
+
+/*
+* Create an OctetString from a hex string
+*/
+OctetString::OctetString(const std::string& hex_string)
+   {
+   bits.resize(1 + hex_string.length() / 2);
+   bits.resize(hex_decode(&bits[0], hex_string));
+   }
+
+/*
+* Create an OctetString from a byte string
+*/
+OctetString::OctetString(const byte in[], size_t n)
+   {
+   bits.assign(in, in + n);
+   }
+
+/*
+* Set the parity of each key byte to odd
+*/
+void OctetString::set_odd_parity()
+   {
+   const byte ODD_PARITY[256] = {
+      0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07, 0x08, 0x08, 0x0B, 0x0B,
+      0x0D, 0x0D, 0x0E, 0x0E, 0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16,
+      0x19, 0x19, 0x1A, 0x1A, 0x1C, 0x1C, 0x1F, 0x1F, 0x20, 0x20, 0x23, 0x23,
+      0x25, 0x25, 0x26, 0x26, 0x29, 0x29, 0x2A, 0x2A, 0x2C, 0x2C, 0x2F, 0x2F,
+      0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37, 0x38, 0x38, 0x3B, 0x3B,
+      0x3D, 0x3D, 0x3E, 0x3E, 0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46,
+      0x49, 0x49, 0x4A, 0x4A, 0x4C, 0x4C, 0x4F, 0x4F, 0x51, 0x51, 0x52, 0x52,
+      0x54, 0x54, 0x57, 0x57, 0x58, 0x58, 0x5B, 0x5B, 0x5D, 0x5D, 0x5E, 0x5E,
+      0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67, 0x68, 0x68, 0x6B, 0x6B,
+      0x6D, 0x6D, 0x6E, 0x6E, 0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76,
+      0x79, 0x79, 0x7A, 0x7A, 0x7C, 0x7C, 0x7F, 0x7F, 0x80, 0x80, 0x83, 0x83,
+      0x85, 0x85, 0x86, 0x86, 0x89, 0x89, 0x8A, 0x8A, 0x8C, 0x8C, 0x8F, 0x8F,
+      0x91, 0x91, 0x92, 0x92, 0x94, 0x94, 0x97, 0x97, 0x98, 0x98, 0x9B, 0x9B,
+      0x9D, 0x9D, 0x9E, 0x9E, 0xA1, 0xA1, 0xA2, 0xA2, 0xA4, 0xA4, 0xA7, 0xA7,
+      0xA8, 0xA8, 0xAB, 0xAB, 0xAD, 0xAD, 0xAE, 0xAE, 0xB0, 0xB0, 0xB3, 0xB3,
+      0xB5, 0xB5, 0xB6, 0xB6, 0xB9, 0xB9, 0xBA, 0xBA, 0xBC, 0xBC, 0xBF, 0xBF,
+      0xC1, 0xC1, 0xC2, 0xC2, 0xC4, 0xC4, 0xC7, 0xC7, 0xC8, 0xC8, 0xCB, 0xCB,
+      0xCD, 0xCD, 0xCE, 0xCE, 0xD0, 0xD0, 0xD3, 0xD3, 0xD5, 0xD5, 0xD6, 0xD6,
+      0xD9, 0xD9, 0xDA, 0xDA, 0xDC, 0xDC, 0xDF, 0xDF, 0xE0, 0xE0, 0xE3, 0xE3,
+      0xE5, 0xE5, 0xE6, 0xE6, 0xE9, 0xE9, 0xEA, 0xEA, 0xEC, 0xEC, 0xEF, 0xEF,
+      0xF1, 0xF1, 0xF2, 0xF2, 0xF4, 0xF4, 0xF7, 0xF7, 0xF8, 0xF8, 0xFB, 0xFB,
+      0xFD, 0xFD, 0xFE, 0xFE };
+
+   for(size_t j = 0; j != bits.size(); ++j)
+      bits[j] = ODD_PARITY[bits[j]];
+   }
+
+/*
+* Hex encode an OctetString
+*/
+std::string OctetString::as_string() const
+   {
+   return hex_encode(&bits[0], bits.size());
+   }
+
+/*
+* XOR Operation for OctetStrings
+*/
+OctetString& OctetString::operator^=(const OctetString& k)
+   {
+   if(&k == this) { zeroise(bits); return (*this); }
+   xor_buf(&bits[0], k.begin(), std::min(length(), k.length()));
+   return (*this);
+   }
+
+/*
+* Equality Operation for OctetStrings
+*/
+bool operator==(const OctetString& s1, const OctetString& s2)
+   {
+   return (s1.bits_of() == s2.bits_of());
+   }
+
+/*
+* Unequality Operation for OctetStrings
+*/
+bool operator!=(const OctetString& s1, const OctetString& s2)
+   {
+   return !(s1 == s2);
+   }
+
+/*
+* Append Operation for OctetStrings
+*/
+OctetString operator+(const OctetString& k1, const OctetString& k2)
+   {
+   secure_vector<byte> out;
+   out += k1.bits_of();
+   out += k2.bits_of();
+   return OctetString(out);
+   }
+
+/*
+* XOR Operation for OctetStrings
+*/
+OctetString operator^(const OctetString& k1, const OctetString& k2)
+   {
+   secure_vector<byte> ret(std::max(k1.length(), k2.length()));
+
+   copy_mem(&ret[0], k1.begin(), k1.length());
+   xor_buf(&ret[0], k2.begin(), k2.length());
+   return OctetString(ret);
+   }
+
+}