#include <dirent.h>
#include <string.h>
#include <fcntl.h>
+#include <locale.h>
#include <sys/types.h>
#include <log/log.h>
#include <util/util.h>
#include <i18n/i18n.h>
-#include "gpg.h"
+#include <gpgme.h>
+
+#include "security.h"
/*
* If --with-signed-boot is enabled lib/security provides the ability to handle
* to guarantee secure boot by itself.
*/
-struct pb_url * gpg_get_signature_url(void *ctx, struct pb_url *base_file)
-{
- struct pb_url *signature_file = NULL;
-
- signature_file = pb_url_copy(ctx, base_file);
- talloc_free(signature_file->file);
- signature_file->file = talloc_asprintf(signature_file,
- "%s.sig", base_file->file);
- talloc_free(signature_file->path);
- signature_file->path = talloc_asprintf(signature_file,
- "%s.sig", base_file->path);
-
- return signature_file;
-}
-
int decrypt_file(const char *filename,
FILE *authorized_signatures_handle, const char *keyring_path)
{
gpgme_set_locale(NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
err = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: OpenPGP support not available\n", __func__);
+ pb_log_fn("OpenPGP support not available\n");
return -1;
}
err = gpgme_get_engine_info(&enginfo);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: GPG engine failed to initialize\n", __func__);
+ pb_log_fn("GPG engine failed to initialize\n");
return -1;
}
err = gpgme_new(&gpg_context);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: GPG context could not be created\n", __func__);
+ pb_log_fn("GPG context could not be created\n");
return -1;
}
err = gpgme_set_protocol(gpg_context, GPGME_PROTOCOL_OpenPGP);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: GPG protocol could not be set\n", __func__);
+ pb_log_fn("GPG protocol could not be set\n");
return -1;
}
if (keyring_path)
GPGME_PROTOCOL_OpenPGP,
enginfo->file_name, enginfo->home_dir);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: Could not set GPG engine information\n", __func__);
+ pb_log_fn("Could not set GPG engine information\n");
return -1;
}
err = gpgme_data_new(&plaintext_data);
err = gpgme_op_decrypt_verify(gpg_context, ciphertext_data,
plaintext_data);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: Could not decrypt file\n", __func__);
+ pb_log_fn("Could not decrypt file\n");
return -1;
}
verification_result = gpgme_op_verify_result(gpg_context);
gpgme_release(gpg_context);
if (!valid) {
- pb_log("%s: Incorrect GPG signature\n", __func__);
+ pb_log_fn("Incorrect GPG signature\n");
return -1;
}
gpgme_set_locale(NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
err = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: OpenPGP support not available\n", __func__);
+ pb_log_fn("OpenPGP support not available\n");
return -1;
}
err = gpgme_get_engine_info(&enginfo);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: GPG engine failed to initialize\n", __func__);
+ pb_log_fn("GPG engine failed to initialize\n");
return -1;
}
err = gpgme_new(&gpg_context);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: GPG context could not be created\n", __func__);
+ pb_log_fn("GPG context could not be created\n");
return -1;
}
err = gpgme_set_protocol(gpg_context, GPGME_PROTOCOL_OpenPGP);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: GPG protocol could not be set\n", __func__);
+ pb_log_fn("GPG protocol could not be set\n");
return -1;
}
if (keyring_path)
GPGME_PROTOCOL_OpenPGP, enginfo->file_name,
enginfo->home_dir);
if (err != GPG_ERR_NO_ERROR) {
- pb_log("%s: Could not set GPG engine information\n", __func__);
+ pb_log_fn("Could not set GPG engine information\n");
return -1;
}
err = gpgme_data_new_from_file(&plaintext_data, plaintext_filename, 1);
gpgme_release(gpg_context);
if (!valid) {
- pb_log("%s: Incorrect GPG signature\n", __func__);
+ pb_log_fn("Incorrect GPG signature\n");
return -1;
}
return 0;
}
-int gpg_validate_boot_files(struct boot_task *boot_task) {
- int result = 0;
- char *kernel_filename = NULL;
- char *initrd_filename = NULL;
- char *dtb_filename = NULL;
-
- FILE *authorized_signatures_handle = NULL;
-
- char cmdline_template[] = "/tmp/petitbootXXXXXX";
- int cmdline_fd = mkstemp(cmdline_template);
- FILE *cmdline_handle = NULL;
-
- const char* local_initrd_signature = (boot_task->verify_signature) ?
- boot_task->local_initrd_signature : NULL;
- const char* local_dtb_signature = (boot_task->verify_signature) ?
- boot_task->local_dtb_signature : NULL;
- const char* local_image_signature = (boot_task->verify_signature) ?
- boot_task->local_image_signature : NULL;
- const char* local_cmdline_signature =
- (boot_task->verify_signature || boot_task->decrypt_files) ?
- boot_task->local_cmdline_signature : NULL;
-
- if ((!boot_task->verify_signature) && (!boot_task->decrypt_files))
- return result;
-
- /* Load authorized signatures file */
- authorized_signatures_handle = fopen(LOCKDOWN_FILE, "r");
- if (!authorized_signatures_handle) {
- pb_log("%s: unable to read lockdown file\n", __func__);
- return KEXEC_LOAD_SIG_SETUP_INVALID;
- }
-
- /* Copy files to temporary directory for verification / boot */
- result = copy_file_secure_dest(boot_task,
- boot_task->local_image,
- &kernel_filename);
- if (result) {
- pb_log("%s: image copy failed: (%d)\n",
- __func__, result);
- return result;
- }
- if (boot_task->local_initrd) {
- result = copy_file_secure_dest(boot_task,
- boot_task->local_initrd,
- &initrd_filename);
- if (result) {
- pb_log("%s: initrd copy failed: (%d)\n",
- __func__, result);
- return result;
- }
- }
- if (boot_task->local_dtb) {
- result = copy_file_secure_dest(boot_task,
- boot_task->local_dtb,
- &dtb_filename);
- if (result) {
- pb_log("%s: dtb copy failed: (%d)\n",
- __func__, result);
- return result;
- }
- }
- boot_task->local_image_override = talloc_strdup(boot_task,
- kernel_filename);
- if (boot_task->local_initrd)
- boot_task->local_initrd_override = talloc_strdup(boot_task,
- initrd_filename);
- if (boot_task->local_dtb)
- boot_task->local_dtb_override = talloc_strdup(boot_task,
- dtb_filename);
-
- /* Write command line to temporary file for verification */
- if (cmdline_fd < 0) {
- /* mkstemp failed */
- pb_log("%s: failed: unable to create command line"
- " temporary file for verification\n",
- __func__);
- result = -1;
- }
- else {
- cmdline_handle = fdopen(cmdline_fd, "w");
- }
- if (!cmdline_handle) {
- /* Failed to open file */
- pb_log("%s: failed: unable to write command line"
- " temporary file for verification\n",
- __func__);
- result = -1;
- }
- else {
- fwrite(boot_task->args, sizeof(char),
- strlen(boot_task->args), cmdline_handle);
- fflush(cmdline_handle);
- }
-
- if (boot_task->verify_signature) {
- /* Check signatures */
- if (verify_file_signature(kernel_filename,
- local_image_signature,
- authorized_signatures_handle,
- "/etc/gpg"))
- if (verify_file_signature(cmdline_template,
- local_cmdline_signature,
- authorized_signatures_handle,
- "/etc/gpg"))
-
- if (boot_task->local_initrd_signature)
- if (verify_file_signature(initrd_filename,
- local_initrd_signature,
- authorized_signatures_handle,
- "/etc/gpg"))
- result = KEXEC_LOAD_SIGNATURE_FAILURE;
- if (boot_task->local_dtb_signature)
- if (verify_file_signature(dtb_filename,
- local_dtb_signature,
- authorized_signatures_handle,
- "/etc/gpg"))
- result = KEXEC_LOAD_SIGNATURE_FAILURE;
-
- /* Clean up */
- if (cmdline_handle) {
- fclose(cmdline_handle);
- unlink(cmdline_template);
- }
- fclose(authorized_signatures_handle);
- } else if (boot_task->decrypt_files) {
- /* Decrypt files */
- if (decrypt_file(kernel_filename,
- authorized_signatures_handle,
- "/etc/gpg"))
- result = KEXEC_LOAD_DECRYPTION_FALURE;
- if (verify_file_signature(cmdline_template,
- local_cmdline_signature,
- authorized_signatures_handle,
- "/etc/gpg"))
- result = KEXEC_LOAD_SIGNATURE_FAILURE;
- if (boot_task->local_initrd)
- if (decrypt_file(initrd_filename,
- authorized_signatures_handle,
- "/etc/gpg"))
- result = KEXEC_LOAD_DECRYPTION_FALURE;
- if (boot_task->local_dtb)
- if (decrypt_file(dtb_filename,
- authorized_signatures_handle,
- "/etc/gpg"))
- result = KEXEC_LOAD_DECRYPTION_FALURE;
-
- /* Clean up */
- if (cmdline_handle) {
- fclose(cmdline_handle);
- unlink(cmdline_template);
- }
- fclose(authorized_signatures_handle);
- }
-
- return result;
-}
-
-void gpg_validate_boot_files_cleanup(struct boot_task *boot_task) {
- if ((boot_task->verify_signature) || (boot_task->decrypt_files)) {
- unlink(boot_task->local_image_override);
- if (boot_task->local_initrd_override)
- unlink(boot_task->local_initrd_override);
- if (boot_task->local_dtb_override)
- unlink(boot_task->local_dtb_override);
-
- talloc_free(boot_task->local_image_override);
- if (boot_task->local_initrd_override)
- talloc_free(boot_task->local_initrd_override);
- if (boot_task->local_dtb_override)
- talloc_free(boot_task->local_dtb_override);
- }
-}
-
int lockdown_status() {
/* assume most restrictive lockdown type */
int ret = PB_LOCKDOWN_SIGN;
+#if !defined(HARD_LOCKDOWN)
if (access(LOCKDOWN_FILE, F_OK) == -1)
return PB_LOCKDOWN_NONE;
+#endif
/* determine lockdown type */
FILE *authorized_signatures_handle = NULL;
authorized_signatures_handle)) != -1) {
auth_sig_len = strlen(auth_sig_line);
while ((auth_sig_line[auth_sig_len-1] == '\n')
- || (auth_sig_line[auth_sig_len-1] == '\r'))
- auth_sig_len--;
+ || (auth_sig_line[auth_sig_len-1] == '\r'))
+ auth_sig_len--;
auth_sig_line[auth_sig_len] = 0;
if (strcmp(auth_sig_line, "ENCRYPTED") == 0) {
/* first line indicates encrypted files
}
free(auth_sig_line);
- return ret;
-}
\ No newline at end of file
+ return ret;
+}
+
projects / petitboot / blobdiff