1 files changed, 94 insertions, 0 deletions
diff --git a/src/lib/crypto/hash_sha1cd.cpp b/src/lib/crypto/hash_sha1cd.cpp
new file mode 100644
index 0000000..863591e
--- /dev/null
+++ b/src/lib/crypto/hash_sha1cd.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2021-2022 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 <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <cassert>
+#include "logging.h"
+#include "hash_sha1cd.hpp"
+
+namespace rnp {
+Hash_SHA1CD::Hash_SHA1CD() : Hash(PGP_HASH_SHA1)
+{
+    assert(size_ == 20);
+    SHA1DCInit(&ctx_);
+}
+
+Hash_SHA1CD::Hash_SHA1CD(const Hash_SHA1CD &src) : Hash(PGP_HASH_SHA1)
+{
+    ctx_ = src.ctx_;
+}
+
+Hash_SHA1CD::~Hash_SHA1CD()
+{
+}
+
+std::unique_ptr<Hash_SHA1CD>
+Hash_SHA1CD::create()
+{
+    return std::unique_ptr<Hash_SHA1CD>(new Hash_SHA1CD());
+}
+
+std::unique_ptr<Hash>
+Hash_SHA1CD::clone() const
+{
+    return std::unique_ptr<Hash>(new Hash_SHA1CD(*this));
+}
+
+/* This produces runtime error: load of misaligned address 0x60d0000030a9 for type 'const
+ * uint32_t' (aka 'const unsigned int'), which requires 4 byte alignment */
+#if defined(__clang__)
+__attribute__((no_sanitize("undefined")))
+#endif
+void
+Hash_SHA1CD::add(const void *buf, size_t len)
+{
+    SHA1DCUpdate(&ctx_, (const char *) buf, len);
+}
+
+#if defined(__clang__)
+__attribute__((no_sanitize("undefined")))
+#endif
+size_t
+Hash_SHA1CD::finish(uint8_t *digest)
+{
+    unsigned char fixed_digest[20];
+    int           res = SHA1DCFinal(fixed_digest, &ctx_);
+    if (res && digest) {
+        /* Show warning only if digest is non-null */
+        RNP_LOG("Warning! SHA1 collision detected and mitigated.");
+    }
+    if (res) {
+        throw rnp_exception(RNP_ERROR_BAD_STATE);
+    }
+    if (digest) {
+        memcpy(digest, fixed_digest, 20);
+    }
+    return 20;
+}
+
+} // namespace rnp