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agent: Return a better error code if no passphrase was given.

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* agent/protect.c (hash_passphrase): Handle an empty passphrase.
--

This is mostly useful in loopback pinentry-mode.
This commit is contained in:
Werner Koch 2013-02-06 12:42:07 +01:00
parent c27315fc64
commit 4483a4f0ea
1 changed files with 5 additions and 1 deletions
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6
agent/protect.c
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@ -1075,7 +1075,11 @@ hash_passphrase (const char *passphrase, int hashalgo,
unsigned long s2kcount,
unsigned char *key, size_t keylen)
{
/* The key derive function does not support a zero length string for
the passphrase in the S2K modes. Return a better suited error
code than GPG_ERR_INV_DATA. */
if (!passphrase || !*passphrase)
return gpg_error (GPG_ERR_NO_PASSPHRASE);
return gcry_kdf_derive (passphrase, strlen (passphrase),
s2kmode == 3? GCRY_KDF_ITERSALTED_S2K :
s2kmode == 1? GCRY_KDF_SALTED_S2K :