1 files changed, 116 insertions, 0 deletions
diff --git a/lib/engine/openssl/bn_wrap.cpp b/lib/engine/openssl/bn_wrap.cpp
new file mode 100644
index 000000000..0a7e42368
--- /dev/null
+++ b/lib/engine/openssl/bn_wrap.cpp
@@ -0,0 +1,116 @@
+/*
+* OpenSSL BN Wrapper
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/internal/bn_wrap.h>
+
+namespace Botan {
+
+/*
+* OSSL_BN Constructor
+*/
+OSSL_BN::OSSL_BN(const BigInt& in)
+   {
+   m_bn = BN_new();
+   secure_vector<byte> encoding = BigInt::encode_locked(in);
+   if(in != 0)
+      BN_bin2bn(&encoding[0], encoding.size(), m_bn);
+   }
+
+/*
+* OSSL_BN Constructor
+*/
+OSSL_BN::OSSL_BN(const byte in[], size_t length)
+   {
+   m_bn = BN_new();
+   BN_bin2bn(in, length, m_bn);
+   }
+
+/*
+* OSSL_BN Copy Constructor
+*/
+OSSL_BN::OSSL_BN(const OSSL_BN& other)
+   {
+   m_bn = BN_dup(other.m_bn);
+   }
+
+/*
+* OSSL_BN Destructor
+*/
+OSSL_BN::~OSSL_BN()
+   {
+   BN_clear_free(m_bn);
+   }
+
+/*
+* OSSL_BN Assignment Operator
+*/
+OSSL_BN& OSSL_BN::operator=(const OSSL_BN& other)
+   {
+   BN_copy(m_bn, other.m_bn);
+   return (*this);
+   }
+
+/*
+* Export the BIGNUM as a bytestring
+*/
+void OSSL_BN::encode(byte out[], size_t length) const
+   {
+   BN_bn2bin(m_bn, out + (length - bytes()));
+   }
+
+/*
+* Return the number of significant bytes
+*/
+size_t OSSL_BN::bytes() const
+   {
+   return BN_num_bytes(m_bn);
+   }
+
+/*
+* OpenSSL to BigInt Conversions
+*/
+BigInt OSSL_BN::to_bigint() const
+   {
+   secure_vector<byte> out(bytes());
+   BN_bn2bin(m_bn, &out[0]);
+   return BigInt::decode(out);
+   }
+
+/*
+* OSSL_BN_CTX Constructor
+*/
+OSSL_BN_CTX::OSSL_BN_CTX()
+   {
+   m_ctx = BN_CTX_new();
+   }
+
+/*
+* OSSL_BN_CTX Copy Constructor
+*/
+OSSL_BN_CTX::OSSL_BN_CTX(const OSSL_BN_CTX&)
+   {
+   m_ctx = BN_CTX_new();
+   }
+
+/*
+* OSSL_BN_CTX Destructor
+*/
+OSSL_BN_CTX::~OSSL_BN_CTX()
+   {
+   BN_CTX_free(m_ctx);
+   }
+
+/*
+* OSSL_BN_CTX Assignment Operator
+*/
+OSSL_BN_CTX& OSSL_BN_CTX::operator=(const OSSL_BN_CTX&)
+   {
+   m_ctx = BN_CTX_new();
+   return (*this);
+   }
+
+}