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-rw-r--r--src/script/bitcoinconsensus.cpp91
-rw-r--r--src/script/bitcoinconsensus.h67
2 files changed, 158 insertions, 0 deletions
diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
new file mode 100644
index 0000000000..4faa760ad7
--- /dev/null
+++ b/src/script/bitcoinconsensus.cpp
@@ -0,0 +1,91 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "bitcoinconsensus.h"
+
+#include "core/transaction.h"
+#include "script/interpreter.h"
+#include "version.h"
+
+namespace {
+
+/** A class that deserializes a single CTransaction one time. */
+class TxInputStream
+{
+public:
+ TxInputStream(int nTypeIn, int nVersionIn, const unsigned char *txTo, size_t txToLen) :
+ m_type(nTypeIn),
+ m_version(nVersionIn),
+ m_data(txTo),
+ m_remaining(txToLen)
+ {}
+
+ TxInputStream& read(char* pch, size_t nSize)
+ {
+ if (nSize > m_remaining)
+ throw std::ios_base::failure(std::string(__func__) + ": end of data");
+
+ if (pch == NULL)
+ throw std::ios_base::failure(std::string(__func__) + ": bad destination buffer");
+
+ if (m_data == NULL)
+ throw std::ios_base::failure(std::string(__func__) + ": bad source buffer");
+
+ memcpy(pch, m_data, nSize);
+ m_remaining -= nSize;
+ m_data += nSize;
+ return *this;
+ }
+
+ template<typename T>
+ TxInputStream& operator>>(T& obj)
+ {
+ ::Unserialize(*this, obj, m_type, m_version);
+ return *this;
+ }
+
+private:
+ const int m_type;
+ const int m_version;
+ const unsigned char* m_data;
+ size_t m_remaining;
+};
+
+inline int set_error(bitcoinconsensus_error* ret, bitcoinconsensus_error serror)
+{
+ if (ret)
+ *ret = serror;
+ return 0;
+}
+
+} // anon namespace
+
+int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen,
+ const unsigned char *txTo , unsigned int txToLen,
+ unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err)
+{
+ try {
+ TxInputStream stream(SER_NETWORK, PROTOCOL_VERSION, txTo, txToLen);
+ CTransaction tx;
+ stream >> tx;
+ if (nIn >= tx.vin.size())
+ return set_error(err, bitcoinconsensus_ERR_TX_INDEX);
+ if (tx.GetSerializeSize(SER_NETWORK, PROTOCOL_VERSION) != txToLen)
+ return set_error(err, bitcoinconsensus_ERR_TX_SIZE_MISMATCH);
+
+ // Regardless of the verification result, the tx did not error.
+ set_error(err, bitcoinconsensus_ERR_OK);
+
+ return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, SignatureChecker(tx, nIn), NULL);
+ } catch (std::exception &e) {
+ return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing
+ }
+}
+
+unsigned int bitcoinconsensus_version()
+{
+ // Just use the API version for now
+ return BITCOINCONSENSUS_API_VER;
+}
diff --git a/src/script/bitcoinconsensus.h b/src/script/bitcoinconsensus.h
new file mode 100644
index 0000000000..15e3337a8d
--- /dev/null
+++ b/src/script/bitcoinconsensus.h
@@ -0,0 +1,67 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_BITCOINCONSENSUS_H
+#define BITCOIN_BITCOINCONSENSUS_H
+
+#if defined(BUILD_BITCOIN_INTERNAL) && defined(HAVE_CONFIG_H)
+#include "config/bitcoin-config.h"
+ #if defined(_WIN32)
+ #if defined(DLL_EXPORT)
+ #if defined(HAVE_FUNC_ATTRIBUTE_DLLEXPORT)
+ #define EXPORT_SYMBOL __declspec(dllexport)
+ #else
+ #define EXPORT_SYMBOL
+ #endif
+ #endif
+ #elif defined(HAVE_FUNC_ATTRIBUTE_VISIBILITY)
+ #define EXPORT_SYMBOL __attribute__ ((visibility ("default")))
+ #endif
+#elif defined(MSC_VER) && !defined(STATIC_LIBBITCOINCONSENSUS)
+ #define EXPORT_SYMBOL __declspec(dllimport)
+#endif
+
+#ifndef EXPORT_SYMBOL
+ #define EXPORT_SYMBOL
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BITCOINCONSENSUS_API_VER 0
+
+typedef enum bitcoinconsensus_error_t
+{
+ bitcoinconsensus_ERR_OK = 0,
+ bitcoinconsensus_ERR_TX_INDEX,
+ bitcoinconsensus_ERR_TX_SIZE_MISMATCH,
+ bitcoinconsensus_ERR_TX_DESERIALIZE,
+} bitcoinconsensus_error;
+
+/** Script verification flags */
+enum
+{
+ bitcoinconsensus_SCRIPT_FLAGS_VERIFY_NONE = 0,
+ bitcoinconsensus_SCRIPT_FLAGS_VERIFY_P2SH = (1U << 0), // evaluate P2SH (BIP16) subscripts
+};
+
+/// Returns 1 if the input nIn of the serialized transaction pointed to by
+/// txTo correctly spends the scriptPubKey pointed to by scriptPubKey under
+/// the additional constraints specified by flags.
+/// If not NULL, err will contain an error/success code for the operation
+EXPORT_SYMBOL int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen,
+ const unsigned char *txTo , unsigned int txToLen,
+ unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err);
+
+EXPORT_SYMBOL unsigned int bitcoinconsensus_version();
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#undef EXPORT_SYMBOL
+
+#endif // BITCOIN_BITCOINCONSENSUS_H