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authormaximius <none@none>2009-10-17 15:51:44 -0700
committermaximius <none@none>2009-10-17 15:51:44 -0700
commite585187b248f48b3c6e9247b49fa07c6565d65e5 (patch)
tree637c5b7ddacf41040bef4ea4f75a97da64c6a9bc /src/shared/Auth/BigNumber.cpp
parent26b5e033ffde3d161382fc9addbfa99738379641 (diff)
*Backed out changeset 3be01fb200a5
--HG-- branch : trunk
Diffstat (limited to 'src/shared/Auth/BigNumber.cpp')
-rw-r--r--src/shared/Auth/BigNumber.cpp39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/shared/Auth/BigNumber.cpp b/src/shared/Auth/BigNumber.cpp
index 837b75804df..303687c266c 100644
--- a/src/shared/Auth/BigNumber.cpp
+++ b/src/shared/Auth/BigNumber.cpp
@@ -17,143 +17,182 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+
#include "Auth/BigNumber.h"
#include <openssl/bn.h>
#include <algorithm>
+
BigNumber::BigNumber()
{
_bn = BN_new();
_array = NULL;
}
+
BigNumber::BigNumber(const BigNumber &bn)
{
_bn = BN_dup(bn._bn);
_array = NULL;
}
+
BigNumber::BigNumber(uint32 val)
{
_bn = BN_new();
BN_set_word(_bn, val);
_array = NULL;
}
+
BigNumber::~BigNumber()
{
BN_free(_bn);
if(_array) delete[] _array;
}
+
void BigNumber::SetDword(uint32 val)
{
BN_set_word(_bn, val);
}
+
void BigNumber::SetQword(uint64 val)
{
BN_add_word(_bn, (uint32)(val >> 32));
BN_lshift(_bn, _bn, 32);
BN_add_word(_bn, (uint32)(val & 0xFFFFFFFF));
}
+
void BigNumber::SetBinary(const uint8 *bytes, int len)
{
uint8 t[1000];
for (int i = 0; i < len; i++) t[i] = bytes[len - 1 - i];
BN_bin2bn(t, len, _bn);
}
+
void BigNumber::SetHexStr(const char *str)
{
BN_hex2bn(&_bn, str);
}
+
void BigNumber::SetRand(int numbits)
{
BN_rand(_bn, numbits, 0, 1);
}
+
BigNumber BigNumber::operator=(const BigNumber &bn)
{
BN_copy(_bn, bn._bn);
return *this;
}
+
BigNumber BigNumber::operator+=(const BigNumber &bn)
{
BN_add(_bn, _bn, bn._bn);
return *this;
}
+
BigNumber BigNumber::operator-=(const BigNumber &bn)
{
BN_sub(_bn, _bn, bn._bn);
return *this;
}
+
BigNumber BigNumber::operator*=(const BigNumber &bn)
{
BN_CTX *bnctx;
+
bnctx = BN_CTX_new();
BN_mul(_bn, _bn, bn._bn, bnctx);
BN_CTX_free(bnctx);
+
return *this;
}
+
BigNumber BigNumber::operator/=(const BigNumber &bn)
{
BN_CTX *bnctx;
+
bnctx = BN_CTX_new();
BN_div(_bn, NULL, _bn, bn._bn, bnctx);
BN_CTX_free(bnctx);
+
return *this;
}
+
BigNumber BigNumber::operator%=(const BigNumber &bn)
{
BN_CTX *bnctx;
+
bnctx = BN_CTX_new();
BN_mod(_bn, _bn, bn._bn, bnctx);
BN_CTX_free(bnctx);
+
return *this;
}
+
BigNumber BigNumber::Exp(const BigNumber &bn)
{
BigNumber ret;
BN_CTX *bnctx;
+
bnctx = BN_CTX_new();
BN_exp(ret._bn, _bn, bn._bn, bnctx);
BN_CTX_free(bnctx);
+
return ret;
}
+
BigNumber BigNumber::ModExp(const BigNumber &bn1, const BigNumber &bn2)
{
BigNumber ret;
BN_CTX *bnctx;
+
bnctx = BN_CTX_new();
BN_mod_exp(ret._bn, _bn, bn1._bn, bn2._bn, bnctx);
BN_CTX_free(bnctx);
+
return ret;
}
+
int BigNumber::GetNumBytes(void)
{
return BN_num_bytes(_bn);
}
+
uint32 BigNumber::AsDword()
{
return (uint32)BN_get_word(_bn);
}
+
bool BigNumber::isZero() const
{
return BN_is_zero(_bn)!=0;
}
+
uint8 *BigNumber::AsByteArray(int minSize)
{
int length = (minSize >= GetNumBytes()) ? minSize : GetNumBytes();
+
if (_array)
{
delete[] _array;
_array = NULL;
}
_array = new uint8[length];
+
// If we need more bytes than length of BigNumber set the rest to 0
if (length > GetNumBytes())
memset((void*)_array, 0, length);
+
BN_bn2bin(_bn, (unsigned char *)_array);
+
std::reverse(_array, _array + length);
+
return _array;
}
+
const char *BigNumber::AsHexStr()
{
return BN_bn2hex(_bn);
}
+
const char *BigNumber::AsDecStr()
{
return BN_bn2dec(_bn);