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Add comments on OpenSSH AES-encrypted key support, including one

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mentioning that I haven't yet switched to _exporting_ OpenSSH keys
in the new style.

[originally from svn r8917]
This commit is contained in:
Simon Tatham 2010-04-12 11:02:06 +00:00
parent 108791e15c
commit 97ca111e29
1 changed files with 7 additions and 0 deletions
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7
import.c
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@ -529,6 +529,10 @@ struct ssh2_userkey *openssh_read(const Filename *filename, char *passphrase,
* - let block B equal MD5(A || passphrase || iv)
* - block C would be MD5(B || passphrase || iv) and so on
* - encryption key is the first N bytes of A || B
*
* (Note that only 8 bytes of the iv are used for key
* derivation, even when the key is encrypted with AES and
* hence there are 16 bytes available.)
*/
struct MD5Context md5c;
unsigned char keybuf[32];
@ -872,6 +876,9 @@ int openssh_write(const Filename *filename, struct ssh2_userkey *key,
/*
* Encrypt the key.
*
* For the moment, we still encrypt our OpenSSH keys using
* old-style 3DES.
*/
if (passphrase) {
/*