1 files changed, 160 insertions, 0 deletions
diff --git a/src/lib/crypto/hash.cpp b/src/lib/crypto/hash.cpp
new file mode 100644
index 0000000..250deec
--- /dev/null
+++ b/src/lib/crypto/hash.cpp
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2017-2022 Ribose Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "hash_botan.hpp"
+#include "logging.h"
+#include <cassert>
+
+static const id_str_pair botan_alg_map[] = {
+  {PGP_HASH_MD5, "MD5"},
+  {PGP_HASH_SHA1, "SHA-1"},
+  {PGP_HASH_RIPEMD, "RIPEMD-160"},
+  {PGP_HASH_SHA256, "SHA-256"},
+  {PGP_HASH_SHA384, "SHA-384"},
+  {PGP_HASH_SHA512, "SHA-512"},
+  {PGP_HASH_SHA224, "SHA-224"},
+#if defined(ENABLE_SM2)
+  {PGP_HASH_SM3, "SM3"},
+#endif
+  {PGP_HASH_SHA3_256, "SHA-3(256)"},
+  {PGP_HASH_SHA3_512, "SHA-3(512)"},
+  {0, NULL},
+};
+
+namespace rnp {
+
+Hash_Botan::Hash_Botan(pgp_hash_alg_t alg) : Hash(alg)
+{
+    auto name = Hash_Botan::name_backend(alg);
+    if (!name) {
+        throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
+    }
+
+    fn_ = Botan::HashFunction::create(name);
+    if (!fn_) {
+        RNP_LOG("Error creating hash object for '%s'", name);
+        throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
+    }
+
+    assert(size_ == fn_->output_length());
+}
+
+Hash_Botan::Hash_Botan(const Hash_Botan &src) : Hash(src.alg_)
+{
+    if (!src.fn_) {
+        throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
+    }
+    fn_ = src.fn_->copy_state();
+}
+
+Hash_Botan::~Hash_Botan()
+{
+}
+
+std::unique_ptr<Hash_Botan>
+Hash_Botan::create(pgp_hash_alg_t alg)
+{
+    return std::unique_ptr<Hash_Botan>(new Hash_Botan(alg));
+}
+
+std::unique_ptr<Hash>
+Hash_Botan::clone() const
+{
+    return std::unique_ptr<Hash>(new Hash_Botan(*this));
+}
+
+void
+Hash_Botan::add(const void *buf, size_t len)
+{
+    if (!fn_) {
+        throw rnp_exception(RNP_ERROR_NULL_POINTER);
+    }
+    fn_->update(static_cast<const uint8_t *>(buf), len);
+}
+
+size_t
+Hash_Botan::finish(uint8_t *digest)
+{
+    if (!fn_) {
+        return 0;
+    }
+    size_t outlen = size_;
+    if (digest) {
+        fn_->final(digest);
+    }
+    fn_ = nullptr;
+    size_ = 0;
+    return outlen;
+}
+
+const char *
+Hash_Botan::name_backend(pgp_hash_alg_t alg)
+{
+    return id_str_pair::lookup(botan_alg_map, alg);
+}
+
+CRC24_Botan::CRC24_Botan()
+{
+    fn_ = Botan::HashFunction::create("CRC24");
+    if (!fn_) {
+        RNP_LOG("Error creating CRC24 object");
+        throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
+    }
+    assert(3 == fn_->output_length());
+}
+
+CRC24_Botan::~CRC24_Botan()
+{
+}
+
+std::unique_ptr<CRC24_Botan>
+CRC24_Botan::create()
+{
+    return std::unique_ptr<CRC24_Botan>(new CRC24_Botan());
+}
+
+void
+CRC24_Botan::add(const void *buf, size_t len)
+{
+    if (!fn_) {
+        throw rnp_exception(RNP_ERROR_NULL_POINTER);
+    }
+    fn_->update(static_cast<const uint8_t *>(buf), len);
+}
+
+std::array<uint8_t, 3>
+CRC24_Botan::finish()
+{
+    if (!fn_) {
+        throw rnp_exception(RNP_ERROR_NULL_POINTER);
+    }
+    std::array<uint8_t, 3> crc{};
+    fn_->final(crc.data());
+    fn_ = nullptr;
+    return crc;
+}
+
+} // namespace rnp