Added gsutil to depot tools

third_party/gsutil/boto/boto/core/auth.py

Index: third_party/gsutil/boto/boto/core/auth.py
diff --git a/third_party/gsutil/boto/boto/core/auth.py b/third_party/gsutil/boto/boto/core/auth.py
new file mode 100644
index 0000000000000000000000000000000000000000..890faa5b1dc5ca54278dd2914f894a5952f2a773
--- /dev/null
+++ b/third_party/gsutil/boto/boto/core/auth.py
@@ -0,0 +1,78 @@
+# Copyright (c) 2012 Mitch Garnaat http://garnaat.org/
+# Copyright (c) 2012 Amazon.com, Inc. or its affiliates.
+# All Rights Reserved
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish, dis-
+# tribute, sublicense, and/or sell copies of the Software, and to permit
+# persons to whom the Software is furnished to do so, subject to the fol-
+# lowing conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+import requests.packages.urllib3
+import hmac
+import base64
+from hashlib import sha256
+import sys
+import datetime
+
+try:
+    from urllib.parse import quote
+except ImportError:
+    from urllib import quote
+
+
+class SigV2Auth(object):
+    """
+    Sign an Query Signature V2 request.
+    """
+    def __init__(self, credentials, api_version=''):
+        self.credentials = credentials
+        self.api_version = api_version
+        self.hmac = hmac.new(self.credentials.secret_key.encode('utf-8'),
+                             digestmod=sha256)
+
+    def calc_signature(self, args):
+        scheme, host, port = requests.packages.urllib3.get_host(args['url'])
+        string_to_sign = '%s\n%s\n%s\n' % (args['method'], host, '/')
+        hmac = self.hmac.copy()
+        args['params']['SignatureMethod'] = 'HmacSHA256'
+        if self.credentials.token:
+            args['params']['SecurityToken'] = self.credentials.token
+        sorted_params = sorted(args['params'])
+        pairs = []
+        for key in sorted_params:
+            value = args['params'][key]
+            pairs.append(quote(key, safe='') + '=' +
+                         quote(value, safe='-_~'))
+        qs = '&'.join(pairs)
+        string_to_sign += qs
+        print('string_to_sign')
+        print(string_to_sign)
+        hmac.update(string_to_sign.encode('utf-8'))
+        b64 = base64.b64encode(hmac.digest()).strip().decode('utf-8')
+        return (qs, b64)
+
+    def add_auth(self, args):
+        args['params']['Action'] = 'DescribeInstances'
+        args['params']['AWSAccessKeyId'] = self.credentials.access_key
+        args['params']['SignatureVersion'] = '2'
+        args['params']['Timestamp'] = datetime.datetime.utcnow().isoformat()
+        args['params']['Version'] = self.api_version
+        qs, signature = self.calc_signature(args)
+        args['params']['Signature'] = signature
+        if args['method'] == 'POST':
+            args['data'] = args['params']
+            args['params'] = {}