--- /dev/null
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2009 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/extcmd.h>
+#include <grub/file.h>
+#include <grub/disk.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/crypto.h>
+#include <grub/normal.h>
+
+static const struct grub_arg_option options[] = {
+ {"hash", 'h', 0, "Specify hash to use.", "HASH", ARG_TYPE_STRING},
+ {"check", 'c', 0, "Check hash list file.", "FILE", ARG_TYPE_STRING},
+ {"prefix", 'p', 0, "Base directory for hash list.", "DIRECTORY",
+ ARG_TYPE_STRING},
+ {"keep-going", 'k', 0, "Don't stop after first error.", 0, 0},
+ {0, 0, 0, 0, 0, 0}
+};
+
+struct { const char *name; const char *hashname; } aliases[] =
+ {
+ {"sha256sum", "sha256"},
+ {"sha512sum", "sha512"},
+ {"md5sum", "md5"},
+ };
+
+static inline int
+hextoval (char c)
+{
+ if (c >= '0' && c <= '9')
+ return c - '0';
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+ return -1;
+}
+
+static grub_err_t
+hash_file (grub_file_t file, const gcry_md_spec_t *hash, void *result)
+{
+ grub_uint8_t context[hash->contextsize];
+ char *readbuf[4096];
+
+ grub_memset (context, 0, sizeof (context));
+ hash->init (context);
+ while (1)
+ {
+ grub_ssize_t r;
+ r = grub_file_read (file, readbuf, sizeof (readbuf));
+ if (r < 0)
+ return grub_errno;
+ if (r == 0)
+ break;
+ hash->write (context, readbuf, r);
+ }
+ hash->final (context);
+ grub_memcpy (result, hash->read (context), hash->mdlen);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+check_list (const gcry_md_spec_t *hash, const char *hashfilename,
+ const char *prefix, int keep)
+{
+ grub_file_t hashlist, file;
+ char *buf = NULL;
+ grub_uint8_t expected[hash->mdlen];
+ grub_uint8_t actual[hash->mdlen];
+ grub_err_t err;
+ unsigned i;
+ unsigned unread = 0, mismatch = 0;
+
+ hashlist = grub_file_open (hashfilename);
+ if (!hashlist)
+ return grub_errno;
+
+ while (grub_free (buf), (buf = grub_file_getline (hashlist)))
+ {
+ const char *p = buf;
+ for (i = 0; i < hash->mdlen; i++)
+ {
+ int high, low;
+ high = hextoval (*p++);
+ low = hextoval (*p++);
+ if (high < 0 || low < 0)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid hash list");
+ expected[i] = (high << 4) | low;
+ }
+ if (*p++ != ' ' || *p++ != ' ')
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid hash list");
+ if (prefix)
+ {
+ char *filename;
+
+ filename = grub_malloc (grub_strlen (prefix)
+ + grub_strlen (p) + 2);
+ if (!filename)
+ return grub_errno;
+ grub_sprintf (filename, "%s/%s", prefix, p);
+ file = grub_file_open (filename);
+ grub_free (filename);
+ }
+ else
+ file = grub_file_open (p);
+ if (!file)
+ {
+ grub_file_close (hashlist);
+ grub_free (buf);
+ return grub_errno;
+ }
+ err = hash_file (file, hash, actual);
+ grub_file_close (file);
+ if (err)
+ {
+ grub_printf ("%s: READ ERROR\n", p);
+ if (!keep)
+ {
+ grub_file_close (hashlist);
+ grub_free (buf);
+ return err;
+ }
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ unread++;
+ continue;
+ }
+ if (grub_crypto_memcmp (expected, actual, hash->mdlen) != 0)
+ {
+ grub_printf ("%s: HASH MISMATCH\n", p);
+ if (!keep)
+ {
+ grub_file_close (hashlist);
+ grub_free (buf);
+ return grub_error (GRUB_ERR_TEST_FAILURE,
+ "hash of '%s' mismatches", p);
+ }
+ mismatch++;
+ continue;
+ }
+ grub_printf ("%s: OK\n", p);
+ }
+ if (mismatch || unread)
+ return grub_error (GRUB_ERR_TEST_FAILURE,
+ "%d files couldn't be read and hash "
+ "of %d files mismatches", unread, mismatch);
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_hashsum (struct grub_extcmd *cmd,
+ int argc, char **args)
+{
+ struct grub_arg_list *state = cmd->state;
+ const char *hashname = NULL;
+ const char *prefix = NULL;
+ const gcry_md_spec_t *hash;
+ unsigned i;
+ int keep = state[3].set;
+ unsigned unread = 0;
+
+ for (i = 0; i < ARRAY_SIZE (aliases); i++)
+ if (grub_strcmp (cmd->cmd->name, aliases[i].name) == 0)
+ hashname = aliases[i].hashname;
+ if (state[0].set)
+ hashname = state[0].arg;
+
+ if (!hashname)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, "no hash specified");
+
+ hash = grub_crypto_lookup_md_by_name (hashname);
+ if (!hash)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, "unknown hash");
+
+ if (state[2].set)
+ prefix = state[2].arg;
+
+ if (state[1].set)
+ {
+ if (argc != 0)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT,
+ "--check is incompatible with file list");
+ return check_list (hash, state[1].arg, prefix, keep);
+ }
+
+ for (i = 0; i < (unsigned) argc; i++)
+ {
+ grub_uint8_t result[hash->mdlen];
+ grub_file_t file;
+ grub_err_t err;
+ unsigned j;
+ file = grub_file_open (args[i]);
+ if (!file)
+ {
+ if (!keep)
+ return grub_errno;
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ unread++;
+ continue;
+ }
+ err = hash_file (file, hash, result);
+ grub_file_close (file);
+ if (err)
+ {
+ if (!keep)
+ return err;
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ unread++;
+ continue;
+ }
+ for (j = 0; j < hash->mdlen; j++)
+ grub_printf ("%02x", result[j]);
+ grub_printf (" %s\n", args[i]);
+ }
+
+ if (unread)
+ return grub_error (GRUB_ERR_TEST_FAILURE, "%d files couldn't be read.",
+ unread);
+ return GRUB_ERR_NONE;
+}
+
+static grub_extcmd_t cmd, cmd_md5, cmd_sha256, cmd_sha512;
+
+GRUB_MOD_INIT(hashsum)
+{
+ cmd = grub_register_extcmd ("hashsum", grub_cmd_hashsum,
+ GRUB_COMMAND_FLAG_BOTH,
+ "hashsum -h HASH [-c FILE [-p PREFIX]] "
+ "[FILE1 [FILE2 ...]]",
+ "Compute or check hash checksum.",
+ options);
+ cmd_md5 = grub_register_extcmd ("md5sum", grub_cmd_hashsum,
+ GRUB_COMMAND_FLAG_BOTH,
+ "md5sum [-c FILE [-p PREFIX]] "
+ "[FILE1 [FILE2 ...]]",
+ "Compute or check hash checksum.",
+ options);
+ cmd_sha256 = grub_register_extcmd ("sha256sum", grub_cmd_hashsum,
+ GRUB_COMMAND_FLAG_BOTH,
+ "sha256sum [-c FILE [-p PREFIX]] "
+ "[FILE1 [FILE2 ...]]",
+ "Compute or check hash checksum.",
+ options);
+ cmd_sha512 = grub_register_extcmd ("sha512sum", grub_cmd_hashsum,
+ GRUB_COMMAND_FLAG_BOTH,
+ "sha512sum [-c FILE [-p PREFIX]] "
+ "[FILE1 [FILE2 ...]]",
+ "Compute or check hash checksum.",
+ options);
+}
+
+GRUB_MOD_FINI(hashsum)
+{
+ grub_unregister_extcmd (cmd);
+ grub_unregister_extcmd (cmd_md5);
+ grub_unregister_extcmd (cmd_sha256);
+ grub_unregister_extcmd (cmd_sha512);
+}
projects / thirdparty / grub.git / commitdiff
