From 71ce59a2648185c8e1ccd5b3a1af6ff05dbac7d7 Mon Sep 17 00:00:00 2001
From: Randolph Tan <randolph@10gen.com>
Date: Thu, 16 Feb 2017 13:39:22 -0500
Subject: SERVER-28052 Make SHA1Hash a full fledged class

---
 src/mongo/crypto/sha1_block.cpp | 88 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/mongo/crypto/sha1_block.cpp

(limited to 'src/mongo/crypto/sha1_block.cpp')

diff --git a/src/mongo/crypto/sha1_block.cpp b/src/mongo/crypto/sha1_block.cpp
new file mode 100644
index 00000000000..52880cd0438
--- /dev/null
+++ b/src/mongo/crypto/sha1_block.cpp
@@ -0,0 +1,88 @@
+/**
+ *    Copyright (C) 2017 MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/crypto/sha1_block.h"
+
+#include "mongo/bson/bsonmisc.h"
+#include "mongo/bson/bsonobjbuilder.h"
+#include "mongo/util/base64.h"
+#include "mongo/util/mongoutils/str.h"
+
+namespace mongo {
+
+constexpr size_t SHA1Block::kHashLength;
+
+SHA1Block::SHA1Block(HashType hash) : _hash(std::move(hash)) {}
+
+StatusWith<SHA1Block> SHA1Block::fromBuffer(const uint8_t* input, size_t inputLen) {
+    if (inputLen != kHashLength) {
+        return {ErrorCodes::InvalidLength,
+                str::stream() << "Unsupported SHA1Hash hash length: " << inputLen};
+    }
+
+    HashType newHash;
+    memcpy(newHash.data(), input, inputLen);
+    return SHA1Block(newHash);
+}
+
+StatusWith<SHA1Block> SHA1Block::fromBinData(const BSONBinData& binData) {
+    if (binData.type != BinDataGeneral) {
+        return {ErrorCodes::UnsupportedFormat, "SHA1Block only accepts BinDataGeneral type"};
+    }
+
+    if (binData.length != kHashLength) {
+        return {ErrorCodes::UnsupportedFormat,
+                str::stream() << "Unsupported SHA1Block hash length: " << binData.length};
+    }
+
+    HashType newHash;
+    memcpy(newHash.data(), binData.data, binData.length);
+    return SHA1Block(newHash);
+}
+
+std::string SHA1Block::toString() const {
+    return base64::encode(reinterpret_cast<const char*>(_hash.data()), _hash.size());
+}
+
+void SHA1Block::appendAsBinData(BSONObjBuilder& builder, StringData fieldName) {
+    builder.appendBinData(fieldName, _hash.size(), BinDataGeneral, _hash.data());
+}
+
+void SHA1Block::xorInline(const SHA1Block& other) {
+    for (size_t x = 0; x < _hash.size(); x++) {
+        _hash[x] ^= other._hash[x];
+    }
+}
+
+bool SHA1Block::operator==(const SHA1Block& rhs) const {
+    return rhs._hash == this->_hash;
+}
+
+}  // namespace mongo
-- 
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