1 files changed, 152 insertions, 0 deletions
diff --git a/src/lib/crypto/hash_ossl.cpp b/src/lib/crypto/hash_ossl.cpp
new file mode 100644
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--- /dev/null
+++ b/src/lib/crypto/hash_ossl.cpp
@@ -0,0 +1,152 @@
+/*
+ * 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 "hash_ossl.hpp"
+#include <stdio.h>
+#include <memory>
+#include <cassert>
+#include <openssl/err.h>
+#include "config.h"
+#include "types.h"
+#include "utils.h"
+#include "str-utils.h"
+#include "defaults.h"
+
+static const id_str_pair openssl_alg_map[] = {
+  {PGP_HASH_MD5, "md5"},
+  {PGP_HASH_SHA1, "sha1"},
+  {PGP_HASH_RIPEMD, "ripemd160"},
+  {PGP_HASH_SHA256, "sha256"},
+  {PGP_HASH_SHA384, "sha384"},
+  {PGP_HASH_SHA512, "sha512"},
+  {PGP_HASH_SHA224, "sha224"},
+  {PGP_HASH_SM3, "sm3"},
+  {PGP_HASH_SHA3_256, "sha3-256"},
+  {PGP_HASH_SHA3_512, "sha3-512"},
+  {0, NULL},
+};
+
+namespace rnp {
+Hash_OpenSSL::Hash_OpenSSL(pgp_hash_alg_t alg) : Hash(alg)
+{
+    const char *  hash_name = Hash_OpenSSL::name_backend(alg);
+    const EVP_MD *hash_tp = EVP_get_digestbyname(hash_name);
+    if (!hash_tp) {
+        RNP_LOG("Error creating hash object for '%s'", hash_name);
+        throw rnp_exception(RNP_ERROR_BAD_STATE);
+    }
+    fn_ = EVP_MD_CTX_new();
+    if (!fn_) {
+        RNP_LOG("Allocation failure");
+        throw rnp_exception(RNP_ERROR_OUT_OF_MEMORY);
+    }
+    int res = EVP_DigestInit_ex(fn_, hash_tp, NULL);
+    if (res != 1) {
+        RNP_LOG("Digest initializataion error %d : %lu", res, ERR_peek_last_error());
+        EVP_MD_CTX_free(fn_);
+        throw rnp_exception(RNP_ERROR_BAD_STATE);
+    }
+    assert(size_ == (size_t) EVP_MD_size(hash_tp));
+}
+
+Hash_OpenSSL::Hash_OpenSSL(const Hash_OpenSSL &src) : Hash(src.alg_)
+{
+    if (!src.fn_) {
+        throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
+    }
+
+    fn_ = EVP_MD_CTX_new();
+    if (!fn_) {
+        RNP_LOG("Allocation failure");
+        throw rnp_exception(RNP_ERROR_OUT_OF_MEMORY);
+    }
+
+    int res = EVP_MD_CTX_copy(fn_, src.fn_);
+    if (res != 1) {
+        RNP_LOG("Digest copying error %d: %lu", res, ERR_peek_last_error());
+        EVP_MD_CTX_free(fn_);
+        throw rnp_exception(RNP_ERROR_BAD_STATE);
+    }
+}
+
+std::unique_ptr<Hash_OpenSSL>
+Hash_OpenSSL::create(pgp_hash_alg_t alg)
+{
+    return std::unique_ptr<Hash_OpenSSL>(new Hash_OpenSSL(alg));
+}
+
+std::unique_ptr<Hash>
+Hash_OpenSSL::clone() const
+{
+    return std::unique_ptr<Hash>(new Hash_OpenSSL(*this));
+}
+
+void
+Hash_OpenSSL::add(const void *buf, size_t len)
+{
+    if (!fn_) {
+        throw rnp_exception(RNP_ERROR_NULL_POINTER);
+    }
+    int res = EVP_DigestUpdate(fn_, buf, len);
+    if (res != 1) {
+        RNP_LOG("Digest updating error %d: %lu", res, ERR_peek_last_error());
+        throw rnp_exception(RNP_ERROR_GENERIC);
+    }
+}
+
+size_t
+Hash_OpenSSL::finish(uint8_t *digest)
+{
+    if (!fn_) {
+        return 0;
+    }
+    int res = digest ? EVP_DigestFinal_ex(fn_, digest, NULL) : 1;
+    EVP_MD_CTX_free(fn_);
+    fn_ = NULL;
+    if (res != 1) {
+        RNP_LOG("Digest finalization error %d: %lu", res, ERR_peek_last_error());
+        return 0;
+    }
+
+    size_t outsz = size_;
+    size_ = 0;
+    return outsz;
+}
+
+Hash_OpenSSL::~Hash_OpenSSL()
+{
+    if (!fn_) {
+        return;
+    }
+    EVP_MD_CTX_free(fn_);
+}
+
+const char *
+Hash_OpenSSL::name_backend(pgp_hash_alg_t alg)
+{
+    return id_str_pair::lookup(openssl_alg_map, alg);
+}
+} // namespace rnp