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agent: Support unprotected ssh keys.

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* agent/command-ssh.c (ssh_key_to_protected_buffer): If the empty
passphrase is supplied, do not protect the key.

GnuPG-bug-id: 2856
Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2017-06-26 14:54:39 +02:00
parent b49b1a87ac
commit 2739647985
No known key found for this signature in database
GPG Key ID: DD1A52F9DA8C9020
1 changed files with 12 additions and 1 deletions
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13
agent/command-ssh.c
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@ -2980,6 +2980,7 @@ ssh_key_extract_comment (gcry_sexp_t key, char **r_comment)
/* This function converts the key contained in the S-Expression KEY
into a buffer, which is protected by the passphrase PASSPHRASE.
If PASSPHRASE is the empty passphrase, the key is not protected.
Returns usual error code. */
static gpg_error_t
ssh_key_to_protected_buffer (gcry_sexp_t key, const char *passphrase,
@ -3000,7 +3001,17 @@ ssh_key_to_protected_buffer (gcry_sexp_t key, const char *passphrase,
gcry_sexp_sprint (key, GCRYSEXP_FMT_CANON, buffer_new, buffer_new_n);
/* FIXME: guarantee? */
err = agent_protect (buffer_new, passphrase, buffer, buffer_n, 0, -1);
if (*passphrase)
err = agent_protect (buffer_new, passphrase, buffer, buffer_n, 0, -1);
else
{
/* The key derivation function does not support zero length
* strings. Store key unprotected if the user wishes so. */
*buffer = buffer_new;
*buffer_n = buffer_new_n;
buffer_new = NULL;
err = 0;
}
out: