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-rw-r--r--test/test_utils.py9
-rw-r--r--youtube_dl/utils.py15
2 files changed, 24 insertions, 0 deletions
diff --git a/test/test_utils.py b/test/test_utils.py
index 3cdb21d40..aefd94518 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -52,6 +52,7 @@ from youtube_dl.utils import (
parse_filesize,
parse_count,
parse_iso8601,
+ pkcs1pad,
read_batch_urls,
sanitize_filename,
sanitize_path,
@@ -1104,6 +1105,14 @@ The first line
ohdave_rsa_encrypt(b'aa111222', e, N),
'726664bd9a23fd0c70f9f1b84aab5e3905ce1e45a584e9cbcf9bcc7510338fc1986d6c599ff990d923aa43c51c0d9013cd572e13bc58f4ae48f2ed8c0b0ba881')
+ def test_pkcs1pad(self):
+ data = [1, 2, 3]
+ padded_data = pkcs1pad(data, 32)
+ self.assertEqual(padded_data[:2], [0, 2])
+ self.assertEqual(padded_data[28:], [0, 1, 2, 3])
+
+ self.assertRaises(ValueError, pkcs1pad, data, 8)
+
def test_encode_base_n(self):
self.assertEqual(encode_base_n(0, 30), '0')
self.assertEqual(encode_base_n(80, 30), '2k')
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 17b83794a..8bd075eaf 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -3336,6 +3336,21 @@ def ohdave_rsa_encrypt(data, exponent, modulus):
return '%x' % encrypted
+def pkcs1pad(data, length):
+ """
+ Padding input data with PKCS#1 scheme
+
+ @param {int[]} data input data
+ @param {int} length target length
+ @returns {int[]} padded data
+ """
+ if len(data) > length - 11:
+ raise ValueError('Input data too long for PKCS#1 padding')
+
+ pseudo_random = [random.randint(0, 254) for _ in range(length - len(data) - 3)]
+ return [0, 2] + pseudo_random + [0] + data
+
+
def encode_base_n(num, n, table=None):
FULL_TABLE = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
if not table: