after discussion with Simon.
git-svn-id: svn://svn.tartarus.org/sgt/putty@3440
cda61777-01e9-0310-a592-
d414129be87e
* data "putty-private-key-file-mac-key"
* data passphrase
*
* data "putty-private-key-file-mac-key"
* data passphrase
*
- * Encrypted keys should have a MAC, whereas unencrypted ones must
- * have a hash.
+ * (An empty passphrase is used for unencrypted keys.)
*
* If the key is encrypted, the encryption key is derived from the
* passphrase by means of a succession of SHA-1 hashes. Each hash
*
* If the key is encrypted, the encryption key is derived from the
* passphrase by means of a succession of SHA-1 hashes. Each hash