/*
* Returns success if the specified "key" is listed in the file "filename",
* SSH_ERR_KEY_NOT_FOUND: if the key is not listed or another error.
* If "strict_type" is set then the key type must match exactly,
* otherwise a comparison that ignores certficiate data is performed.
* If "check_ca" is set and "key" is a certificate, then its CA key is
* also checked and sshkey_in_file() will return success if either is found.
*/
int
sshkey_in_file(struct sshkey *key, const char *filename, int strict_type,
int check_ca)
{
FILE *f;
char *line = NULL, *cp;
size_t linesize = 0;
int r = 0;
struct sshkey *pub = NULL;
int (*sshkey_compare)(const struct sshkey *, const struct sshkey *) =
strict_type ? sshkey_equal : sshkey_equal_public;
if ((f = fopen(filename, "r")) == NULL)
return SSH_ERR_SYSTEM_ERROR;
while (getline(&line, &linesize, f) != -1) {
sshkey_free(pub);
pub = NULL;
cp = line;
/* Skip leading whitespace. */
for (; *cp && (*cp == ' ' || *cp == '\t'); cp++)
;
/* Skip comments and empty lines */
switch (*cp) {
case '#':
case '\n':
case '\0':
continue;
}
if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
switch (r = sshkey_read(pub, &cp)) {
case 0:
break;
case SSH_ERR_KEY_LENGTH:
continue;
default:
goto out;
}
if (sshkey_compare(key, pub) ||
(check_ca && sshkey_is_cert(key) &&
sshkey_compare(key->cert->signature_key, pub))) {
r = 0;
goto out;
}
}
r = SSH_ERR_KEY_NOT_FOUND;
out:
free(line);
sshkey_free(pub);
fclose(f);
return r;
}
/*
* Returns success if the specified "key" is listed in the file "filename",
* SSH_ERR_KEY_NOT_FOUND: if the key is not listed or another error.
* If strict_type is set then the key type must match exactly,
* otherwise a comparison that ignores certficiate data is performed.
*/
int
sshkey_in_file(struct sshkey *key, const char *filename, int strict_type)
{
FILE *f;
char line[SSH_MAX_PUBKEY_BYTES];
char *cp;
u_long linenum = 0;
int r = 0;
struct sshkey *pub = NULL;
int (*sshkey_compare)(const struct sshkey *, const struct sshkey *) =
strict_type ? sshkey_equal : sshkey_equal_public;
if ((f = fopen(filename, "r")) == NULL) {
if (errno == ENOENT)
return SSH_ERR_KEY_NOT_FOUND;
else
return SSH_ERR_SYSTEM_ERROR;
}
while (read_keyfile_line(f, filename, line, sizeof(line),
&linenum) != -1) {
cp = line;
/* Skip leading whitespace. */
for (; *cp && (*cp == ' ' || *cp == '\t'); cp++)
;
/* Skip comments and empty lines */
switch (*cp) {
case '#':
case '\n':
case '\0':
continue;
}
if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
if ((r = sshkey_read(pub, &cp)) != 0)
goto out;
if (sshkey_compare(key, pub)) {
r = 0;
goto out;
}
sshkey_free(pub);
pub = NULL;
}
r = SSH_ERR_KEY_NOT_FOUND;
out:
if (pub != NULL)
sshkey_free(pub);
fclose(f);
return r;
}
static int
sshkey_try_load_public(struct sshkey *k, const char *filename, char **commentp)
{
FILE *f;
char line[SSH_MAX_PUBKEY_BYTES];
char *cp;
u_long linenum = 0;
int r;
if (commentp != NULL)
*commentp = NULL;
if ((f = fopen(filename, "r")) == NULL)
return SSH_ERR_SYSTEM_ERROR;
while (read_keyfile_line(f, filename, line, sizeof(line),
&linenum) != -1) {
cp = line;
switch (*cp) {
case '#':
case '\n':
case '\0':
continue;
}
/* Abort loading if this looks like a private key */
if (strncmp(cp, "-----BEGIN", 10) == 0 ||
strcmp(cp, "SSH PRIVATE KEY FILE") == 0)
break;
/* Skip leading whitespace. */
for (; *cp && (*cp == ' ' || *cp == '\t'); cp++)
;
if (*cp) {
if ((r = sshkey_read(k, &cp)) == 0) {
cp[strcspn(cp, "\r\n")] = '\0';
if (commentp) {
*commentp = strdup(*cp ?
cp : filename);
if (*commentp == NULL)
r = SSH_ERR_ALLOC_FAIL;
}
fclose(f);
return r;
}
}
}
fclose(f);
return SSH_ERR_INVALID_FORMAT;
}
int
hostfile_read_key(char **cpp, u_int *bitsp, struct sshkey *ret)
{
char *cp;
int r;
/* Skip leading whitespace. */
for (cp = *cpp; *cp == ' ' || *cp == '\t'; cp++)
;
if ((r = sshkey_read(ret, &cp)) != 0)
return 0;
/* Skip trailing whitespace. */
for (; *cp == ' ' || *cp == '\t'; cp++)
;
/* Return results. */
*cpp = cp;
if (bitsp != NULL)
*bitsp = sshkey_size(ret);
return 1;
}
int
key_read(Key *ret, char **cpp)
{
return sshkey_read(ret, cpp) == 0 ? 1 : -1;
}