mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
synced 2026-02-13 04:40:37 +01:00
53f5e9afa4
Libraries need to include <gi18n-lib.h>, not <gi18n.h>, so that _() will get defined to "dgettext (GETTEXT_DOMAIN, string)" rather than "gettext (string)" (which will use the program's default domain, which works fine for programs in the NetworkManager tree, but not for external users). Likewise, we need to call bindtextdomain() so that gettext can find the translations if the library is installed in a different prefix from the program using it (and bind_textdomain_codeset(), so it will know the translations are in UTF-8 even if the locale isn't). (The fact that no one noticed this was broken before is because the libraries didn't really start returning useful translated strings much until 0.9.10, and none of the out-of-tree clients have been updated to actually show those strings to users yet.)
498 lines
13 KiB
C
498 lines
13 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager Wireless Applet -- Display wireless access points and allow user control
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*
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* Dan Williams <dcbw@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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* Copyright 2007 - 2009 Red Hat, Inc.
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*/
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#include "config.h"
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#include <glib.h>
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#include <glib/gi18n-lib.h>
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#include <gcrypt.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/x509.h>
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#include <gnutls/pkcs12.h>
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#include "crypto.h"
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#include "nm-errors.h"
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#define SALT_LEN 8
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static gboolean initialized = FALSE;
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gboolean
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crypto_init (GError **error)
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{
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if (initialized)
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return TRUE;
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if (gnutls_global_init() != 0) {
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gnutls_global_deinit();
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g_set_error_literal (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_FAILED,
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_("Failed to initialize the crypto engine."));
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return FALSE;
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}
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initialized = TRUE;
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return TRUE;
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}
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void
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crypto_deinit (void)
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{
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}
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gboolean
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crypto_md5_hash (const char *salt,
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const gsize salt_len,
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const char *password,
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gsize password_len,
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char *buffer,
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gsize buflen,
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GError **error)
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{
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gcry_md_hd_t ctx;
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gcry_error_t err;
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int nkey = buflen;
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const gsize digest_len = 16;
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int count = 0;
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char digest[MD5_HASH_LEN];
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char *p = buffer;
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if (salt)
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g_return_val_if_fail (salt_len >= SALT_LEN, FALSE);
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g_return_val_if_fail (password != NULL, FALSE);
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g_return_val_if_fail (password_len > 0, FALSE);
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g_return_val_if_fail (buffer != NULL, FALSE);
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g_return_val_if_fail (buflen > 0, FALSE);
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err = gcry_md_open (&ctx, GCRY_MD_MD5, 0);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_FAILED,
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_("Failed to initialize the MD5 engine: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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return FALSE;
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}
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while (nkey > 0) {
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int i = 0;
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if (count++)
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gcry_md_write (ctx, digest, digest_len);
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gcry_md_write (ctx, password, password_len);
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if (salt)
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gcry_md_write (ctx, salt, SALT_LEN); /* Only use 8 bytes of salt */
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gcry_md_final (ctx);
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memcpy (digest, gcry_md_read (ctx, 0), digest_len);
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gcry_md_reset (ctx);
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while (nkey && (i < digest_len)) {
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*(p++) = digest[i++];
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nkey--;
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}
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}
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memset (digest, 0, sizeof (digest));
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gcry_md_close (ctx);
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return TRUE;
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}
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char *
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crypto_decrypt (const char *cipher,
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int key_type,
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const guint8 *data,
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gsize data_len,
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const char *iv,
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const gsize iv_len,
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const char *key,
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const gsize key_len,
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gsize *out_len,
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GError **error)
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{
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gcry_cipher_hd_t ctx;
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gcry_error_t err;
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int cipher_mech, i;
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char *output = NULL;
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gboolean success = FALSE;
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gsize pad_len, real_iv_len;
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if (!strcmp (cipher, CIPHER_DES_EDE3_CBC)) {
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cipher_mech = GCRY_CIPHER_3DES;
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real_iv_len = SALT_LEN;
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} else if (!strcmp (cipher, CIPHER_DES_CBC)) {
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cipher_mech = GCRY_CIPHER_DES;
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real_iv_len = SALT_LEN;
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} else if (!strcmp (cipher, CIPHER_AES_CBC)) {
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cipher_mech = GCRY_CIPHER_AES;
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real_iv_len = 16;
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} else {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_UNKNOWN_CIPHER,
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_("Private key cipher '%s' was unknown."),
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cipher);
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return NULL;
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}
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if (iv_len < real_iv_len) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_INVALID_DATA,
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_("Invalid IV length (must be at least %zd)."),
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real_iv_len);
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return NULL;
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}
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output = g_malloc0 (data_len);
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err = gcry_cipher_open (&ctx, cipher_mech, GCRY_CIPHER_MODE_CBC, 0);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Failed to initialize the decryption cipher context: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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err = gcry_cipher_setkey (ctx, key, key_len);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Failed to set symmetric key for decryption: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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err = gcry_cipher_setiv (ctx, iv, iv_len);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Failed to set IV for decryption: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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err = gcry_cipher_decrypt (ctx, output, data_len, data, data_len);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Failed to decrypt the private key: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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pad_len = output[data_len - 1];
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/* Check if the padding at the end of the decrypted data is valid */
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if (pad_len == 0 || pad_len > real_iv_len) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Failed to decrypt the private key: unexpected padding length."));
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goto out;
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}
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/* Validate tail padding; last byte is the padding size, and all pad bytes
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* should contain the padding size.
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*/
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for (i = 1; i <= pad_len; ++i) {
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if (output[data_len - i] != pad_len) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Failed to decrypt the private key."));
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goto out;
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}
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}
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*out_len = data_len - pad_len;
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success = TRUE;
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out:
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if (!success) {
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if (output) {
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/* Don't expose key material */
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memset (output, 0, data_len);
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g_free (output);
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output = NULL;
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}
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}
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gcry_cipher_close (ctx);
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return output;
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}
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char *
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crypto_encrypt (const char *cipher,
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const guint8 *data,
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gsize data_len,
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const char *iv,
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const gsize iv_len,
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const char *key,
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gsize key_len,
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gsize *out_len,
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GError **error)
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{
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gcry_cipher_hd_t ctx;
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gcry_error_t err;
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int cipher_mech;
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char *output = NULL;
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gboolean success = FALSE;
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gsize padded_buf_len, pad_len, output_len;
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char *padded_buf = NULL;
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guint32 i;
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gsize salt_len;
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if (!strcmp (cipher, CIPHER_DES_EDE3_CBC)) {
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cipher_mech = GCRY_CIPHER_3DES;
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salt_len = SALT_LEN;
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} else if (!strcmp (cipher, CIPHER_AES_CBC)) {
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cipher_mech = GCRY_CIPHER_AES;
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salt_len = iv_len;
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} else {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_UNKNOWN_CIPHER,
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_("Private key cipher '%s' was unknown."),
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cipher);
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return NULL;
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}
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/* If data_len % ivlen == 0, then we add another complete block
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* onto the end so that the decrypter knows there's padding.
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*/
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pad_len = iv_len - (data_len % iv_len);
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output_len = padded_buf_len = data_len + pad_len;
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padded_buf = g_malloc0 (padded_buf_len);
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memcpy (padded_buf, data, data_len);
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for (i = 0; i < pad_len; i++)
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padded_buf[data_len + i] = (guint8) (pad_len & 0xFF);
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output = g_malloc0 (output_len);
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err = gcry_cipher_open (&ctx, cipher_mech, GCRY_CIPHER_MODE_CBC, 0);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
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_("Failed to initialize the encryption cipher context: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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err = gcry_cipher_setkey (ctx, key, key_len);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
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_("Failed to set symmetric key for encryption: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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/* gcrypt only wants 8 bytes of the IV (same as the DES block length) */
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err = gcry_cipher_setiv (ctx, iv, salt_len);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
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_("Failed to set IV for encryption: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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err = gcry_cipher_encrypt (ctx, output, output_len, padded_buf, padded_buf_len);
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if (err) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_ENCRYPTION_FAILED,
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_("Failed to encrypt the data: %s / %s."),
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gcry_strsource (err), gcry_strerror (err));
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goto out;
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}
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*out_len = output_len;
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success = TRUE;
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out:
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if (padded_buf) {
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memset (padded_buf, 0, padded_buf_len);
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g_free (padded_buf);
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padded_buf = NULL;
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}
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if (!success) {
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if (output) {
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/* Don't expose key material */
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memset (output, 0, output_len);
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g_free (output);
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output = NULL;
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}
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}
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gcry_cipher_close (ctx);
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return output;
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}
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NMCryptoFileFormat
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crypto_verify_cert (const unsigned char *data,
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gsize len,
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GError **error)
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{
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gnutls_x509_crt_t der;
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gnutls_datum_t dt;
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int err;
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err = gnutls_x509_crt_init (&der);
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if (err < 0) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_INVALID_DATA,
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_("Error initializing certificate data: %s"),
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gnutls_strerror (err));
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return NM_CRYPTO_FILE_FORMAT_UNKNOWN;
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}
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/* Try DER first */
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dt.data = (unsigned char *) data;
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dt.size = len;
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err = gnutls_x509_crt_import (der, &dt, GNUTLS_X509_FMT_DER);
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if (err == GNUTLS_E_SUCCESS) {
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gnutls_x509_crt_deinit (der);
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return NM_CRYPTO_FILE_FORMAT_X509;
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}
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/* And PEM next */
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err = gnutls_x509_crt_import (der, &dt, GNUTLS_X509_FMT_PEM);
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gnutls_x509_crt_deinit (der);
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if (err == GNUTLS_E_SUCCESS)
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return NM_CRYPTO_FILE_FORMAT_X509;
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_INVALID_DATA,
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_("Couldn't decode certificate: %s"),
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gnutls_strerror (err));
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return NM_CRYPTO_FILE_FORMAT_UNKNOWN;
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}
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gboolean
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crypto_verify_pkcs12 (const guint8 *data,
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gsize data_len,
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const char *password,
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GError **error)
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{
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gnutls_pkcs12_t p12;
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gnutls_datum_t dt;
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gboolean success = FALSE;
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int err;
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g_return_val_if_fail (data != NULL, FALSE);
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dt.data = (unsigned char *) data;
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dt.size = data_len;
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err = gnutls_pkcs12_init (&p12);
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if (err < 0) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_FAILED,
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_("Couldn't initialize PKCS#12 decoder: %s"),
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gnutls_strerror (err));
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return FALSE;
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}
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/* DER first */
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err = gnutls_pkcs12_import (p12, &dt, GNUTLS_X509_FMT_DER, 0);
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if (err < 0) {
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/* PEM next */
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err = gnutls_pkcs12_import (p12, &dt, GNUTLS_X509_FMT_PEM, 0);
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if (err < 0) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_INVALID_DATA,
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_("Couldn't decode PKCS#12 file: %s"),
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gnutls_strerror (err));
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goto out;
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}
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}
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err = gnutls_pkcs12_verify_mac (p12, password);
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if (err == GNUTLS_E_SUCCESS)
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success = TRUE;
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else {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_DECRYPTION_FAILED,
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_("Couldn't verify PKCS#12 file: %s"),
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gnutls_strerror (err));
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}
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out:
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gnutls_pkcs12_deinit (p12);
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return success;
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}
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gboolean
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crypto_verify_pkcs8 (const guint8 *data,
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gsize data_len,
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gboolean is_encrypted,
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const char *password,
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GError **error)
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{
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gnutls_x509_privkey_t p8;
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gnutls_datum_t dt;
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int err;
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g_return_val_if_fail (data != NULL, FALSE);
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dt.data = (unsigned char *) data;
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dt.size = data_len;
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err = gnutls_x509_privkey_init (&p8);
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if (err < 0) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_FAILED,
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_("Couldn't initialize PKCS#8 decoder: %s"),
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gnutls_strerror (err));
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return FALSE;
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}
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err = gnutls_x509_privkey_import_pkcs8 (p8,
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&dt,
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GNUTLS_X509_FMT_DER,
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is_encrypted ? password : NULL,
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is_encrypted ? 0 : GNUTLS_PKCS_PLAIN);
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gnutls_x509_privkey_deinit (p8);
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if (err < 0) {
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if (err == GNUTLS_E_UNKNOWN_CIPHER_TYPE) {
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/* HACK: gnutls doesn't support all the cipher types that openssl
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* can use with PKCS#8, so if we encounter one, we have to assume
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* the given password works. gnutls needs to unsuckify, apparently.
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* Specifically, by default openssl uses pbeWithMD5AndDES-CBC
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* which gnutls does not support.
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*/
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} else {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERROR_INVALID_DATA,
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_("Couldn't decode PKCS#8 file: %s"),
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gnutls_strerror (err));
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return FALSE;
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}
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}
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return TRUE;
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}
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gboolean
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crypto_randomize (void *buffer, gsize buffer_len, GError **error)
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{
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gcry_randomize (buffer, buffer_len, GCRY_STRONG_RANDOM);
|
|
return TRUE;
|
|
}
|