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import: add support for gpg2 for verifying imported images 

gpg2 insists on created a trust db even if we tun off all trust db
support. Hence create a temporary home where the trust db is placed, and
remove it after use.
This commit is contained in:
Lennart Poettering 2015-03-02 20:24:11 +01:00
parent 7de304525d
commit 0acfdffe94
1 changed files with 18 additions and 3 deletions
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21
src/import/import-common.c
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@ -281,8 +281,9 @@ int import_verify(
_cleanup_free_ char *fn = NULL;
_cleanup_close_ int sig_file = -1;
const char *p, *line;
char sig_file_path[] = "/tmp/sigXXXXXX";
char sig_file_path[] = "/tmp/sigXXXXXX", gpg_home[] = "/tmp/gpghomeXXXXXX";
_cleanup_sigkill_wait_ pid_t pid = 0;
bool gpg_home_created = false;
int r;
assert(main_job);
@ -347,6 +348,13 @@ int import_verify(
goto finish;
}
if (!mkdtemp(gpg_home)) {
r = log_error_errno(errno, "Failed to create tempory home for gpg: %m");
goto finish;
}
gpg_home_created = true;
pid = fork();
if (pid < 0)
return log_error_errno(errno, "Failed to fork off gpg: %m");
@ -359,13 +367,14 @@ int import_verify(
"--no-auto-check-trustdb",
"--batch",
"--trust-model=always",
NULL, /* keyring to use */
NULL, /* --homedir= */
NULL, /* --keyring= */
NULL, /* --verify */
NULL, /* signature file */
NULL, /* dash */
NULL /* trailing NULL */
};
unsigned k = ELEMENTSOF(cmd) - 5;
unsigned k = ELEMENTSOF(cmd) - 6;
int null_fd;
/* Child */
@ -398,6 +407,8 @@ int import_verify(
if (null_fd != STDOUT_FILENO)
null_fd = safe_close(null_fd);
cmd[k++] = strjoina("--homedir=", gpg_home);
/* We add the user keyring only to the command line
* arguments, if it's around since gpg fails
* otherwise. */
@ -415,6 +426,7 @@ int import_verify(
fd_cloexec(STDOUT_FILENO, false);
fd_cloexec(STDERR_FILENO, false);
execvp("gpg2", (char * const *) cmd);
execvp("gpg", (char * const *) cmd);
log_error_errno(errno, "Failed to execute gpg: %m");
_exit(EXIT_FAILURE);
@ -446,6 +458,9 @@ finish:
if (sig_file >= 0)
unlink(sig_file_path);
if (gpg_home_created)
rm_rf_dangerous(gpg_home, false, true, false);
return r;
}