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#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <linux/limits.h>
#include <libgen.h>
#include <termios.h>
#include <stdio.h>
#include "libnpass/libnpass.h"
#include "libnpass/gpg.h"
#include "libnpass/util.h"
#include "util.h"
#define DEF_PASS_DIR "pass"
#define FPR_MAX 256
static char pass_dir[PATH_MAX] = {0};
const char *pass_gen_set[] = {
"0123456789",
"0123456789"
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
"0123456789"
"abcdefghijklmnopqrstuvwxyz"
"!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
};
int set_pass_dir(void);
int set_pass_dir(void) {
const char *env;
env = getenv("PASSWORD_STORE_DIR");
if (env) {
strncpy(pass_dir, env, sizeof(pass_dir) - 1);
return 0;
}
env = getenv("XDG_DATA_HOME");
if (env) {
snprintf(pass_dir, sizeof(pass_dir) - 1, "%s/%s", env,
DEF_PASS_DIR);
return 0;
}
env = getenv("HOME");
if (env) {
snprintf(pass_dir, sizeof(pass_dir) - 1, "%s/%s/%s", env,
".local/share", DEF_PASS_DIR);
return 0;
}
return 1;
}
int pass_init(const char *fpr)
{
int r;
char gpg_id_path[PATH_MAX];
FILE *gpg_id;
r = set_pass_dir();
if (r)
err_ret(1, "PASSWORD_STORE_DIR not set");
r = gpg_key_validate(fpr);
if (r)
err_ret(1, "key not usable, try gpg --full-generate-key");
r = r_mkdir(pass_dir, S_IRWXU);
if (r)
err_ret(1, "%s %s", pass_dir, strerror(errno));
r = snprintf(gpg_id_path, sizeof(gpg_id_path), "%s/%s", pass_dir, ".gpg-id");
if (r > (int) sizeof(gpg_id_path))
err_ret(1, "path exceeded PATH_MAX");
gpg_id = fopen(gpg_id_path, "w");
if (!gpg_id)
err_ret(1, "%s %s", gpg_id_path, strerror(errno));
r = fwrite(fpr, strlen(fpr), 1,gpg_id);
fclose(gpg_id);
if (!r)
err_ret(1, "write failed");
return 0;
}
int pass_cat(FILE *out, const char *path)
{
int r;
char pass_path[PATH_MAX];
r = set_pass_dir();
if (r)
err_ret(1, "PASSWORD_STORE_DIR not set");
r = snprintf(pass_path, sizeof(pass_path), "%s/%s.gpg", pass_dir, path);
if (r >= (int) sizeof(pass_path))
err_ret(1, "path exceeded PATH_MAX");
r = gpg_decrypt(out, pass_path);
return r;
}
ssize_t pass_getpass(char **lineptr, size_t *n, FILE *stream)
{
ssize_t r;
struct termios new, old;
r = tcgetattr(fileno(stream), &old);
if (r)
return -1;
new = old;
new.c_lflag &= ~ECHO;
r = tcsetattr(fileno(stream), TCSAFLUSH, &new);
if (r)
return -1;
r = getline (lineptr, n, stream);
if (r > 0 && (*lineptr)[r - 1] == '\n')
(*lineptr)[r - 1] = '\0';
(void) tcsetattr (fileno (stream), TCSAFLUSH, &old);
return r;
}
int pass_gen(pass_gen_t gen, char *pass, size_t n)
{
int r;
FILE *rand;
size_t pass_gen_len;
if (n <= 0)
err_ret(1, "small password");
rand = fopen("/dev/urandom", "r");
if (!rand)
err_ret(1, "%s", strerror(errno));
r = fread(pass, sizeof(pass[0]), n, rand);
if (r != (int) n)
err_ret(1, "fread failed");
pass_gen_len = strlen(pass_gen_set[gen]);
for (size_t i = 0; i < n; i++)
pass[i] = pass_gen_set[gen][pass[i] % (pass_gen_len - 1)];
return 0;
}
int pass_add(const char *path, const char *pass, size_t n)
{
int r;
char *rc;
FILE *gpg_id, *out_stream;
char gpg_id_path[PATH_MAX], fpr[FPR_MAX], pass_path[PATH_MAX];
r = set_pass_dir();
if (r)
err_ret(1, "PASSWORD_STORE_DIR not set");
r = snprintf(gpg_id_path, sizeof(gpg_id_path), "%s/%s", pass_dir, ".gpg-id");
if (r > (int) sizeof(gpg_id_path))
err_ret(1, "path exceeded PATH_MAX");
gpg_id = fopen(gpg_id_path, "r");
if (!gpg_id)
err_ret(1, "%s %s", gpg_id_path, strerror(errno));
rc = fgets(fpr, sizeof(fpr), gpg_id);
if (!rc)
err_ret(1, "failed to read %s", gpg_id_path);
fclose(gpg_id);
util_strtrim(fpr);
r = gpg_key_validate(fpr);
if (r)
err_ret(1, "invalid key , try gpg --list-keys");
// TODO: guard against .*\.gpg\.gpg[/$]
r = snprintf(pass_path, sizeof(pass_path), "%s/%s.gpg", pass_dir, path);
if (r > (int) sizeof(pass_path))
err_ret(1, "path exceeded PATH_MAX");
rc = strdup(pass_path);
if (!rc)
err_ret(1, "%s", strerror(errno));
(void) r_mkdir(dirname(rc), S_IRWXU);
free(rc);
r = access(pass_path, F_OK);
if (!(errno & ENOENT))
err_ret(1, "an entry already exists for %s", path);
out_stream = fopen(pass_path, "w");
if (!out_stream)
err_ret(1, "%s", strerror(errno));
r = gpg_encrypt(out_stream, fpr, pass, n);
fclose(out_stream);
return r;
}
int pass_rm(const char *path)
{
int r = 0;
char gpg_path[PATH_MAX], abs_path[PATH_MAX];
r = set_pass_dir();
if (r)
err_ret(1, "PASSWORD_STORE_DIR not set");
r = snprintf(gpg_path, sizeof(gpg_path), "%s.gpg", path);
if (r > (int) sizeof(gpg_path))
err_ret(1, "path exceeded PATH_MAX");
r = snprintf(abs_path, sizeof(gpg_path), "%s/%s", pass_dir, gpg_path);
if (r > (int) sizeof(abs_path))
err_ret(1, "path exceeded PATH_MAX");
// TODO: guard against .*\.gpg\.gpg[/$]
r = unlink(abs_path);
if (r)
err_ret(1, "%s %s", abs_path, strerror(errno));
return r_rmdir(pass_dir, dirname(gpg_path));
}
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