Handle win style CRLF newlines in vault text (#27590)

When parsing a vaulttext blob, use .splitlines()
instead of split(b'\n') to handle \n newlines and
windows style \r\n (CRLF) new lines.

The vaulttext enevelope at this point is just the header line
and a hexlify()'ed blob, so CRLF is a valid newline here.

Fixes #22914

lib/ansible/parsing/vault/__init__.py

@@ -159,7 +159,7 @@ def parse_vaulttext_envelope(b_vaulttext_envelope, default_vault_id=None):
     # used by decrypt
     default_vault_id = default_vault_id or C.DEFAULT_VAULT_IDENTITY
 
-    b_tmpdata = b_vaulttext_envelope.split(b'\n')
+    b_tmpdata = b_vaulttext_envelope.splitlines()
     b_tmpheader = b_tmpdata[0].strip().split(b';')
 
     b_version = b_tmpheader[1].strip()

test/units/parsing/vault/test_vault.py

@@ -516,6 +516,14 @@ class TestVaultLib(unittest.TestCase):
         self.assertEqual(cipher_name, u'TEST', msg="cipher name was not properly set")
         self.assertEqual(b_version, b"9.9", msg="version was not properly set")
 
+    def test_parse_vaulttext_envelope_crlf(self):
+        b_vaulttext = b"$ANSIBLE_VAULT;9.9;TEST\r\nansible"
+        b_ciphertext, b_version, cipher_name, vault_id = vault.parse_vaulttext_envelope(b_vaulttext)
+        b_lines = b_ciphertext.split(b'\n')
+        self.assertEqual(b_lines[0], b"ansible", msg="Payload was not properly split from the header")
+        self.assertEqual(cipher_name, u'TEST', msg="cipher name was not properly set")
+        self.assertEqual(b_version, b"9.9", msg="version was not properly set")
+
     def test_encrypt_decrypt_aes(self):
         self.v.cipher_name = u'AES'
         vault_secrets = self._vault_secrets_from_password('default', 'ansible')