[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/rsa/doc/cli.rst

Index: third_party/gsutil/third_party/rsa/doc/cli.rst
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+Commandline interface
+==================================================
+
+A lot of the Python-RSA functionality is also available as commandline
+scripts. On Linux and other unix-like systems they are executable
+Python scripts, on Windows they are .exe files.
+
+All scripts accept a ``--help`` parameter that give you instructions
+on how to use them. Here is a short overview:
+
+.. index:: CLI interface
+.. index:: pyrsa-keygen, pyrsa-encrypt, pyrsa-decrypt, pyrsa-sign
+.. index:: pyrsa-verify, pyrsa-priv2pub, pyrsa-encrypt-bigfile
+.. index:: pyrsa-decrypt-bigfile, pyrsa-decrypt-bigfile
+
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| Command               | Usage                                            | Core function                           |
++=======================+==================================================+=========================================+
+| pyrsa-keygen          | Generates a new RSA keypair in PEM or DER format | :py:func:`rsa.newkeys`                  |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-encrypt         | Encrypts a file. The file must be shorter than   | :py:func:`rsa.encrypt`                  |
+|                       | the key length in order to be encrypted.         |                                         |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-decrypt         | Decrypts a file.                                 | :py:func:`rsa.decrypt`                  |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-sign            | Signs a file, outputs the signature.             | :py:func:`rsa.sign`                     |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-verify          | Verifies a signature. The result is written to   | :py:func:`rsa.verify`                   |
+|                       | the console as well as returned in the exit      |                                         |
+|                       | status code.                                     |                                         |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-priv2pub        | Reads a private key and outputs the              | \-                                      |
+|                       | corresponding public key.                        |                                         |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-encrypt-bigfile | Encrypts a file to an encrypted VARBLOCK file.   | :py:func:`rsa.bigfile.encrypt_bigfile`  |
+|                       | The file can be larger than the key length, but  |                                         |
+|                       | the output file is only compatible with          |                                         |
+|                       | Python-RSA.                                      |                                         |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+| pyrsa-decrypt-bigfile | Decrypts an encrypted VARBLOCK file.             | :py:func:`rsa.bigfile.encrypt_bigfile`  |
++-----------------------+--------------------------------------------------+-----------------------------------------+
+
+