1 files changed, 83 insertions, 0 deletions
diff --git a/frozen_deps/ecdsa/ssh.py b/frozen_deps/ecdsa/ssh.py
new file mode 100644
index 0000000..64e9403
--- /dev/null
+++ b/frozen_deps/ecdsa/ssh.py
@@ -0,0 +1,83 @@
+import binascii
+from . import der
+from ._compat import compat26_str, int_to_bytes
+
+_SSH_ED25519 = b"ssh-ed25519"
+_SK_MAGIC = b"openssh-key-v1\0"
+_NONE = b"none"
+
+
+def _get_key_type(name):
+ if name == "Ed25519":
+ return _SSH_ED25519
+ else:
+ raise ValueError("Unsupported key type")
+
+
+class _Serializer:
+ def __init__(self):
+ self.bytes = b""
+
+ def put_raw(self, val):
+ self.bytes += val
+
+ def put_u32(self, val):
+ self.bytes += int_to_bytes(val, length=4, byteorder="big")
+
+ def put_str(self, val):
+ self.put_u32(len(val))
+ self.bytes += val
+
+ def put_pad(self, blklen=8):
+ padlen = blklen - (len(self.bytes) % blklen)
+ self.put_raw(bytearray(range(1, 1 + padlen)))
+
+ def encode(self):
+ return binascii.b2a_base64(compat26_str(self.bytes))
+
+ def tobytes(self):
+ return self.bytes
+
+ def topem(self):
+ return der.topem(self.bytes, "OPENSSH PRIVATE KEY")
+
+
+def serialize_public(name, pub):
+ serial = _Serializer()
+ ktype = _get_key_type(name)
+ serial.put_str(ktype)
+ serial.put_str(pub)
+ return b" ".join([ktype, serial.encode()])
+
+
+def serialize_private(name, pub, priv):
+ # encode public part
+ spub = _Serializer()
+ ktype = _get_key_type(name)
+ spub.put_str(ktype)
+ spub.put_str(pub)
+
+ # encode private part
+ spriv = _Serializer()
+ checksum = 0
+ spriv.put_u32(checksum)
+ spriv.put_u32(checksum)
+ spriv.put_raw(spub.tobytes())
+ spriv.put_str(priv + pub)
+ comment = b""
+ spriv.put_str(comment)
+ spriv.put_pad()
+
+ # top-level structure
+ main = _Serializer()
+ main.put_raw(_SK_MAGIC)
+ ciphername = kdfname = _NONE
+ main.put_str(ciphername)
+ main.put_str(kdfname)
+ nokdf = 0
+ main.put_u32(nokdf)
+ nkeys = 1
+ main.put_u32(nkeys)
+ main.put_str(spub.tobytes())
+ main.put_str(spriv.tobytes())
+ return main.topem()