From 4a52a71956a8d46fcb7294ac71734504bb09bcc2 Mon Sep 17 00:00:00 2001
From: S. Solomon Darnell
Date: Fri, 28 Mar 2025 21:52:21 -0500
Subject: two version of R2R are here

---
 .venv/lib/python3.12/site-packages/rsa/util.py | 97 ++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 .venv/lib/python3.12/site-packages/rsa/util.py

(limited to '.venv/lib/python3.12/site-packages/rsa/util.py')

diff --git a/.venv/lib/python3.12/site-packages/rsa/util.py b/.venv/lib/python3.12/site-packages/rsa/util.py
new file mode 100644
index 00000000..8a598cca
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/rsa/util.py
@@ -0,0 +1,97 @@
+#  Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""Utility functions."""
+
+import sys
+from optparse import OptionParser
+
+import rsa.key
+
+
+def private_to_public() -> None:
+    """Reads a private key and outputs the corresponding public key."""
+
+    # Parse the CLI options
+    parser = OptionParser(
+        usage="usage: %prog [options]",
+        description="Reads a private key and outputs the "
+        "corresponding public key. Both private and public keys use "
+        "the format described in PKCS#1 v1.5",
+    )
+
+    parser.add_option(
+        "-i",
+        "--input",
+        dest="infilename",
+        type="string",
+        help="Input filename. Reads from stdin if not specified",
+    )
+    parser.add_option(
+        "-o",
+        "--output",
+        dest="outfilename",
+        type="string",
+        help="Output filename. Writes to stdout of not specified",
+    )
+
+    parser.add_option(
+        "--inform",
+        dest="inform",
+        help="key format of input - default PEM",
+        choices=("PEM", "DER"),
+        default="PEM",
+    )
+
+    parser.add_option(
+        "--outform",
+        dest="outform",
+        help="key format of output - default PEM",
+        choices=("PEM", "DER"),
+        default="PEM",
+    )
+
+    (cli, cli_args) = parser.parse_args(sys.argv)
+
+    # Read the input data
+    if cli.infilename:
+        print(
+            "Reading private key from %s in %s format" % (cli.infilename, cli.inform),
+            file=sys.stderr,
+        )
+        with open(cli.infilename, "rb") as infile:
+            in_data = infile.read()
+    else:
+        print("Reading private key from stdin in %s format" % cli.inform, file=sys.stderr)
+        in_data = sys.stdin.read().encode("ascii")
+
+    assert type(in_data) == bytes, type(in_data)
+
+    # Take the public fields and create a public key
+    priv_key = rsa.key.PrivateKey.load_pkcs1(in_data, cli.inform)
+    pub_key = rsa.key.PublicKey(priv_key.n, priv_key.e)
+
+    # Save to the output file
+    out_data = pub_key.save_pkcs1(cli.outform)
+
+    if cli.outfilename:
+        print(
+            "Writing public key to %s in %s format" % (cli.outfilename, cli.outform),
+            file=sys.stderr,
+        )
+        with open(cli.outfilename, "wb") as outfile:
+            outfile.write(out_data)
+    else:
+        print("Writing public key to stdout in %s format" % cli.outform, file=sys.stderr)
+        sys.stdout.write(out_data.decode("ascii"))
-- 
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