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agent: API change of agent_key_from_file.

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* agent/findkey.c (agent_key_from_file): Always return S-expression.
* agent/command.c (cmd_passwd): Distinguish by SHADOW_INFO.
(cmd_export_key): Likewise.  Free SHADOW_INFO.
(cmd_keytocard): Likewise.  Release S_SKEY.
* agent/pkdecrypt.c (agent_pkdecrypt): Likewise.
* agent/pksign.c (agent_pksign_do): Likewise.  Use the S-expression to
know the key type.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2014-03-04 11:54:59 +09:00
parent 57d26f39af
commit ac5a1a3ccb
4 changed files with 30 additions and 35 deletions
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26
agent/command.c
View File

@ -1667,7 +1667,7 @@ cmd_passwd (assuan_context_t ctx, char *line)
&s_skey, &passphrase);
if (err)
;
else if (!s_skey)
else if (shadow_info)
{
log_error ("changing a smartcard PIN is not yet supported\n");
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
@ -2126,6 +2126,7 @@ cmd_export_key (assuan_context_t ctx, char *line)
int openpgp;
char *cache_nonce;
char *passphrase = NULL;
unsigned char *shadow_info = NULL;
openpgp = has_option (line, "--openpgp");
cache_nonce = option_value (line, "--cache-nonce");
@ -2163,15 +2164,13 @@ cmd_export_key (assuan_context_t ctx, char *line)
/* Get the key from the file. With the openpgp flag we also ask for
the passphrase so that we can use it to re-encrypt it. */
err = agent_key_from_file (ctrl, NULL, ctrl->server_local->keydesc, grip,
NULL, CACHE_MODE_IGNORE, NULL, &s_skey,
&shadow_info, CACHE_MODE_IGNORE, NULL, &s_skey,
openpgp ? &passphrase : NULL);
if (err)
goto leave;
if (!s_skey)
if (shadow_info)
{
/* Key is on a smartcard. Actually we should not see this here
because we do not pass a shadow_info variable to the above
function, thus it will return this error directly. */
/* Key is on a smartcard. */
err = gpg_error (GPG_ERR_UNUSABLE_SECKEY);
goto leave;
}
@ -2241,6 +2240,7 @@ cmd_export_key (assuan_context_t ctx, char *line)
gcry_sexp_release (s_skey);
xfree (ctrl->server_local->keydesc);
ctrl->server_local->keydesc = NULL;
xfree (shadow_info);
return leave_cmd (ctx, err);
}
@ -2260,7 +2260,7 @@ cmd_keytocard (assuan_context_t ctx, char *line)
unsigned char *keydata;
size_t keydatalen, timestamplen;
const char *serialno, *timestamp_str, *id;
unsigned char *shadow_info;
unsigned char *shadow_info = NULL;
unsigned char *shdkey;
time_t timestamp;
@ -2305,12 +2305,20 @@ cmd_keytocard (assuan_context_t ctx, char *line)
return gpg_error (GPG_ERR_INV_VALUE);
err = agent_key_from_file (ctrl, NULL, ctrl->server_local->keydesc, grip,
NULL, CACHE_MODE_IGNORE, NULL, &s_skey, NULL);
&shadow_info, CACHE_MODE_IGNORE, NULL,
&s_skey, NULL);
if (err)
{
xfree (shadow_info);
return err;
if (!s_skey)
}
if (shadow_info)
{
/* Key is on a smartcard already. */
xfree (shadow_info);
gcry_sexp_release (s_skey);
return gpg_error (GPG_ERR_UNUSABLE_SECKEY);
}
keydatalen = gcry_sexp_sprint (s_skey, GCRYSEXP_FMT_CANON, NULL, 0);
keydata = xtrymalloc_secure (keydatalen + 30);

10
agent/findkey.c
View File

@ -537,9 +537,9 @@ read_key_file (const unsigned char *grip, gcry_sexp_t *result)
/* Return the secret key as an S-Exp in RESULT after locating it using
the GRIP. Stores NULL at RESULT if the operation shall be diverted
to a token; in this case an allocated S-expression with the
shadow_info part from the file is stored at SHADOW_INFO.
the GRIP. If the operation shall be diverted to a token, an
allocated S-expression with the shadow_info part from the file is
stored at SHADOW_INFO; if not NULL will be stored at SHADOW_INFO.
CACHE_MODE defines now the cache shall be used. DESC_TEXT may be
set to present a custom description for the pinentry. LOOKUP_TTL
is an optional function to convey a TTL to the cache manager; we do
@ -562,7 +562,6 @@ agent_key_from_file (ctrl_t ctrl, const char *cache_nonce,
unsigned char *buf;
size_t len, buflen, erroff;
gcry_sexp_t s_skey;
int got_shadow_info = 0;
*result = NULL;
if (shadow_info)
@ -638,7 +637,6 @@ agent_key_from_file (ctrl_t ctrl, const char *cache_nonce,
{
memcpy (*shadow_info, s, n);
rc = 0;
got_shadow_info = 1;
}
}
if (rc)
@ -654,7 +652,7 @@ agent_key_from_file (ctrl_t ctrl, const char *cache_nonce,
}
gcry_sexp_release (s_skey);
s_skey = NULL;
if (rc || got_shadow_info)
if (rc)
{
xfree (buf);
if (r_passphrase)

2
agent/pkdecrypt.c
View File

@ -79,7 +79,7 @@ agent_pkdecrypt (ctrl_t ctrl, const char *desc_text,
goto leave;
}
if (!s_skey)
if (shadow_info)
{ /* divert operation to the smartcard */
if (!gcry_sexp_canon_len (ciphertext, ciphertextlen, NULL, NULL))

21
agent/pksign.c
View File

@ -299,31 +299,20 @@ agent_pksign_do (ctrl_t ctrl, const char *cache_nonce,
goto leave;
}
if (!s_skey)
if (shadow_info)
{
/* Divert operation to the smartcard */
gcry_sexp_t s_pkey, l;
const char *name;
size_t len;
unsigned char *buf = NULL;
int key_type;
int is_RSA = 0;
int is_ECDSA = 0;
/* Check keytype by public key */
rc = agent_public_key_from_file (ctrl, ctrl->keygrip, &s_pkey);
if (rc)
{
log_error ("failed to read the public key\n");
goto leave;
}
l = gcry_sexp_cadr (s_pkey);
name = gcry_sexp_nth_data (l, 0, &len);
if (len == 3 && !memcmp (name, "rsa", 3))
key_type = agent_is_dsa_key (s_skey);
if (key_type == 0)
is_RSA = 1;
else if (len == 5 && !memcmp (name, "ecdsa", 5))
else if (key_type == GCRY_PK_ECDSA)
is_ECDSA = 1;
gcry_sexp_release (l);
gcry_sexp_release (s_pkey);
rc = divert_pksign (ctrl,
ctrl->digest.value,