/*
 * Copyright (C) 2012, 2013 Igalia S.L.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY IGALIA S.L. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "CredentialBackingStore.h"

#if ENABLE(CREDENTIAL_STORAGE)
#define SECRET_WITH_UNSTABLE 1
#define SECRET_API_SUBJECT_TO_CHANGE 1
#include "AuthenticationChallenge.h"
#include "GRefPtrGtk.h"
#include <glib/gi18n-lib.h>
#include <libsecret/secret.h>
#include <libsoup/soup.h>
#include <wtf/glib/GUniquePtr.h>
#include <wtf/text/CString.h>
#endif

namespace WebCore {

CredentialBackingStore& credentialBackingStore()
{
    DEPRECATED_DEFINE_STATIC_LOCAL(CredentialBackingStore, backingStore, ());
    return backingStore;
}

#if ENABLE(CREDENTIAL_STORAGE)
static GRefPtr<GHashTable> createAttributeHashTableFromChallenge(const AuthenticationChallenge& challenge, const Credential& credential = Credential())
{
    const char* realm = soup_auth_get_realm(challenge.soupAuth());
    if (!realm)
        return nullptr;

    SoupURI* uri = soup_message_get_uri(challenge.soupMessage());
    GRefPtr<GHashTable> attributes = adoptGRef(secret_attributes_build(
        SECRET_SCHEMA_COMPAT_NETWORK,
        "domain", realm,
        "server", uri->host,
        "protocol", uri->scheme,
        "authtype", soup_auth_get_scheme_name(challenge.soupAuth()),
        "port", uri->port,
        NULL));
    if (credential.isEmpty())
        return attributes;

    g_hash_table_insert(attributes.get(), g_strdup("user"), g_strdup(credential.user().utf8().data()));
    return attributes;
}

struct CredentialForChallengeAsyncReadyCallbackData {
    CredentialBackingStore::CredentialForChallengeCallback callback;
    void* data;
};

static void credentialForChallengeAsyncReadyCallback(SecretService* service, GAsyncResult* asyncResult, CredentialForChallengeAsyncReadyCallbackData* callbackData)
{
    CredentialBackingStore::CredentialForChallengeCallback callback = callbackData->callback;
    void* data = callbackData->data;
    delete callbackData;

    GUniqueOutPtr<GError> error;
    GUniquePtr<GList> elements(secret_service_search_finish(service, asyncResult, &error.outPtr()));
    if (error || !elements || !elements->data) {
        callback(Credential(), data);
        return;
    }

    GRefPtr<SecretItem> secretItem = adoptGRef(static_cast<SecretItem*>(elements->data));
    GRefPtr<GHashTable> attributes = adoptGRef(secret_item_get_attributes(secretItem.get()));
    String user = String::fromUTF8(static_cast<const char*>(g_hash_table_lookup(attributes.get(), "user")));
    if (user.isEmpty()) {
        callback(Credential(), data);
        return;
    }

    size_t length;
    GRefPtr<SecretValue> secretValue = adoptGRef(secret_item_get_secret(secretItem.get()));
    const char* passwordData = secret_value_get(secretValue.get(), &length);
    String password = String::fromUTF8(passwordData, length);

    callback(Credential(user, password, CredentialPersistencePermanent), data);
}
#endif // ENABLE(CREDENTIAL_STORAGE)

void CredentialBackingStore::credentialForChallenge(const AuthenticationChallenge& challenge, CredentialForChallengeCallback callback, void* data)
{
#if ENABLE(CREDENTIAL_STORAGE)
    // The default flag only returns the most recent item, not all of them.
    SecretSearchFlags searchFlags = static_cast<SecretSearchFlags>(SECRET_SEARCH_UNLOCK | SECRET_SEARCH_LOAD_SECRETS);
    CredentialForChallengeAsyncReadyCallbackData* callbackData = new CredentialForChallengeAsyncReadyCallbackData;
    callbackData->callback = callback;
    callbackData->data = data;

    GRefPtr<GHashTable> attributes = createAttributeHashTableFromChallenge(challenge);
    if (!attributes) {
        callback(Credential(), data);
        return;
    }

    secret_service_search(
        0, // The default SecretService.
        SECRET_SCHEMA_COMPAT_NETWORK,
        attributes.get(),
        searchFlags,
        0, // cancellable
        reinterpret_cast<GAsyncReadyCallback>(credentialForChallengeAsyncReadyCallback),
        callbackData);
#else
    UNUSED_PARAM(challenge);
    callback(Credential(), data);
#endif // ENABLE(CREDENTIAL_STORAGE)
}

void CredentialBackingStore::storeCredentialsForChallenge(const AuthenticationChallenge& challenge, const Credential& credential)
{
#if ENABLE(CREDENTIAL_STORAGE)
    GRefPtr<GHashTable> attributes = createAttributeHashTableFromChallenge(challenge, credential);
    if (!attributes)
        return;

    CString utf8Password = credential.password().utf8();
    GRefPtr<SecretValue> newSecretValue = adoptGRef(secret_value_new(utf8Password.data(), utf8Password.length(), "text/plain"));

    secret_service_store(
        0, // The default SecretService.
        SECRET_SCHEMA_COMPAT_NETWORK,
        attributes.get(),
        SECRET_COLLECTION_DEFAULT,
        _("WebKitGTK+ password"),
        newSecretValue.get(),
        0, // cancellable
        0, // callback
        0); // data
#else
    UNUSED_PARAM(challenge);
    UNUSED_PARAM(credential);
#endif // ENABLE(CREDENTIAL_STORAGE)
}

} // namespace WebCore
