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https://gitlab.freedesktop.org/NetworkManager/NetworkManager
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281791ac77
* libnm-util/* - Relicense to LGPLv2+ git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@3859 4912f4e0-d625-0410-9fb7-b9a5a253dbdc
259 lines
6.7 KiB
C
259 lines
6.7 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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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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* (C) Copyright 2007 - 2008 Red Hat, Inc.
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*/
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#include <glib.h>
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#include <glib/gi18n.h>
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#include <prinit.h>
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#include <nss.h>
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#include <pk11pub.h>
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#include <pkcs11t.h>
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#include <cert.h>
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#include "crypto.h"
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gboolean
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crypto_init (GError **error)
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{
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PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 1);
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NSS_NoDB_Init (NULL);
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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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NSS_Shutdown ();
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PR_Cleanup ();
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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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PK11Context *ctx;
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int nkey = buflen;
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unsigned int digest_len;
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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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g_return_val_if_fail (salt != NULL, FALSE);
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g_return_val_if_fail (salt_len >= 8, 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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ctx = PK11_CreateDigestContext (SEC_OID_MD5);
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if (!ctx) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_MD5_INIT_FAILED,
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_("Failed to initialize the MD5 context: %d."),
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PORT_GetError ());
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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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PK11_DigestBegin (ctx);
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if (count++)
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PK11_DigestOp (ctx, (const unsigned char *) digest, digest_len);
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PK11_DigestOp (ctx, (const unsigned char *) password, password_len);
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PK11_DigestOp (ctx, (const unsigned char *) salt, 8); /* Only use 8 bytes of salt */
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PK11_DigestFinal (ctx, (unsigned char *) digest, &digest_len, sizeof (digest));
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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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PK11_DestroyContext (ctx, PR_TRUE);
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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 char *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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char *output = NULL;
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int tmp1_len = 0;
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unsigned int tmp2_len = 0;
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CK_MECHANISM_TYPE cipher_mech;
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PK11SlotInfo *slot = NULL;
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SECItem key_item;
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PK11SymKey *sym_key = NULL;
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SECItem *sec_param = NULL;
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PK11Context *ctx = NULL;
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SECStatus s;
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gboolean success = FALSE;
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gsize len;
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if (!strcmp (cipher, CIPHER_DES_EDE3_CBC))
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cipher_mech = CKM_DES3_CBC_PAD;
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else if (!strcmp (cipher, CIPHER_DES_CBC))
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cipher_mech = CKM_DES_CBC_PAD;
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else {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_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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output = g_malloc0 (data_len + 1);
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if (!output) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_OUT_OF_MEMORY,
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_("Not enough memory for decrypted key buffer."));
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return NULL;
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}
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slot = PK11_GetBestSlot (cipher_mech, NULL);
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if (!slot) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CIPHER_INIT_FAILED,
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_("Failed to initialize the decryption cipher slot."));
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goto out;
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}
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key_item.data = (unsigned char *) key;
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key_item.len = key_len;
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sym_key = PK11_ImportSymKey (slot, cipher_mech, PK11_OriginUnwrap, CKA_DECRYPT, &key_item, NULL);
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if (!sym_key) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CIPHER_SET_KEY_FAILED,
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_("Failed to set symmetric key for decryption."));
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goto out;
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}
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key_item.data = (unsigned char *) iv;
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key_item.len = iv_len;
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sec_param = PK11_ParamFromIV (cipher_mech, &key_item);
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if (!sec_param) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CIPHER_SET_IV_FAILED,
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_("Failed to set IV for decryption."));
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goto out;
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}
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ctx = PK11_CreateContextBySymKey (cipher_mech, CKA_DECRYPT, sym_key, sec_param);
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if (!ctx) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CIPHER_INIT_FAILED,
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_("Failed to initialize the decryption context."));
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goto out;
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}
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s = PK11_CipherOp (ctx,
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(unsigned char *) output,
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&tmp1_len,
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data_len,
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(unsigned char *) data,
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data_len);
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if (s != SECSuccess) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CIPHER_DECRYPT_FAILED,
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_("Failed to decrypt the private key: %d."),
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PORT_GetError ());
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goto out;
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}
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s = PK11_DigestFinal (ctx,
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(unsigned char *) (output + tmp1_len),
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&tmp2_len,
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data_len - tmp1_len);
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if (s != SECSuccess) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CIPHER_DECRYPT_FAILED,
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_("Failed to finalize decryption of the private key: %d."),
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PORT_GetError ());
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goto out;
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}
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len = tmp1_len + tmp2_len;
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if (len > data_len)
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goto out;
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*out_len = len;
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output[*out_len] = '\0';
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success = TRUE;
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out:
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if (ctx)
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PK11_DestroyContext (ctx, PR_TRUE);
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if (sym_key)
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PK11_FreeSymKey (sym_key);
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if (sec_param)
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SECITEM_FreeItem (sec_param, PR_TRUE);
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if (slot)
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PK11_FreeSlot (slot);
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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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return output;
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}
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gboolean
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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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CERTCertificate *cert;
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cert = CERT_DecodeCertFromPackage ((char *) data, len);
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if (!cert) {
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g_set_error (error, NM_CRYPTO_ERROR,
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NM_CRYPTO_ERR_CERT_FORMAT_INVALID,
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_("Couldn't decode certificate: %d"),
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PORT_GetError());
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return FALSE;
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}
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CERT_DestroyCertificate (cert);
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return TRUE;
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}
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