Move lib into src

1 files changed, 59 insertions, 0 deletions

diff --git a/src/lib/cert/cvc/ecdsa_sig.cpp b/src/lib/cert/cvc/ecdsa_sig.cpp
new file mode 100644
index 000000000..690244d50
--- /dev/null
+++ b/src/lib/cert/cvc/ecdsa_sig.cpp
@@ -0,0 +1,59 @@
+/*
+* ECDSA Signature
+* (C) 2007 Falko Strenzke, FlexSecure GmbH
+* (C) 2008-2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/ecdsa_sig.h>
+
+namespace Botan {
+
+ECDSA_Signature::ECDSA_Signature(const std::vector<byte>& ber)
+   {
+   BER_Decoder(ber)
+      .start_cons(SEQUENCE)
+         .decode(m_r)
+         .decode(m_s)
+      .end_cons()
+      .verify_end();
+   }
+
+std::vector<byte> ECDSA_Signature::DER_encode() const
+   {
+   return DER_Encoder()
+      .start_cons(SEQUENCE)
+        .encode(get_r())
+        .encode(get_s())
+      .end_cons()
+      .get_contents_unlocked();
+   }
+
+std::vector<byte> ECDSA_Signature::get_concatenation() const
+   {
+   // use the larger
+   const size_t enc_len = m_r > m_s ? m_r.bytes() : m_s.bytes();
+
+   const auto sv_r = BigInt::encode_1363(m_r, enc_len);
+   const auto sv_s = BigInt::encode_1363(m_s, enc_len);
+
+   secure_vector<byte> result(sv_r);
+   result += sv_s;
+   return unlock(result);
+   }
+
+ECDSA_Signature decode_concatenation(const std::vector<byte>& concat)
+   {
+   if(concat.size() % 2 != 0)
+      throw Invalid_Argument("Erroneous length of signature");
+
+   const size_t rs_len = concat.size() / 2;
+
+   BigInt r = BigInt::decode(&concat[0], rs_len);
+   BigInt s = BigInt::decode(&concat[rs_len], rs_len);
+
+   return ECDSA_Signature(r, s);
+   }
+
+}