1 /*
2  * Copyright 2018 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "updater.hpp"
18 
19 #include "blob_errors.hpp"
20 #include "tool_errors.hpp"
21 
22 #include <algorithm>
23 #include <cstring>
24 #include <memory>
25 
26 void updaterMain(BlobInterface* blob, DataInterface* handler,
27                  const std::string& imagePath, const std::string& signaturePath)
28 {
29     /* TODO(venture): Add optional parameter to specify the flash type, default
30      * to legacy for now.
31      */
32     std::string goalFirmware = "/flash/image";
33 
34     /* Get list of blob_ids, check for /flash/image, or /flash/tarball.
35      * TODO(venture) the mechanism doesn't care, but the caller of burn_my_bmc
36      * will have in mind which they're sending and we need to verify it's
37      * available and use it.
38      */
39     std::vector<std::string> blobs = blob->getBlobList();
40     auto blobInst = std::find_if(
41         blobs.begin(), blobs.end(), [&goalFirmware](const auto& iter) {
42             /* Running into weird scenarios where the string comparison doesn't
43              * work.  TODO: revisit.
44              */
45             return (0 == std::memcmp(goalFirmware.c_str(), iter.c_str(),
46                                      goalFirmware.length()));
47             // return (goalFirmware.compare(iter));
48         });
49     if (blobInst == blobs.end())
50     {
51         throw ToolException(goalFirmware + " not found");
52     }
53 
54     /* Call stat on /flash/image (or /flash/tarball) and check if data interface
55      * is supported.
56      */
57     StatResponse stat;
58     try
59     {
60         stat = blob->getStat(goalFirmware);
61     }
62     catch (const BlobException& b)
63     {
64         throw ToolException("blob exception received: " +
65                             std::string(b.what()));
66     }
67 
68     auto supported = handler->supportedType();
69     if ((stat.blob_state & supported) == 0)
70     {
71         throw ToolException("data interface selected not supported.");
72     }
73 
74     /* Yay, our data handler is supported. */
75     std::uint16_t session;
76     try
77     {
78         session = blob->openBlob(goalFirmware, supported);
79     }
80     catch (const BlobException& b)
81     {
82         throw ToolException("blob exception received: " +
83                             std::string(b.what()));
84     }
85 
86     /* Send over the firmware image. */
87     if (!handler->sendContents(imagePath, session))
88     {
89         throw ToolException("Failed to send contents of " + imagePath);
90     }
91 
92     /* Send over the hash contents. */
93     /* Trigger the verification. */
94     /* Check the verification. */
95 
96     return;
97 }
98