Mercurial > prosody-modules

annotate mod_http_upload_external/README.markdown @ 3967:0957ba6aeb99

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_smacks: Update documentation and slightly adjust default values
author tmolitor <thilo@eightysoft.de>
date Sun, 05 Apr 2020 23:37:17 +0200
parents 0149954cee37
children 5741e6511f3d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2334
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
1 ---
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
2 description: HTTP File Upload (external service)
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
3 labels: 'Stage-Alpha'
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
4 ---
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
5
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
6 Introduction
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
7 ============
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
8
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
9 This module implements [XEP-0363], which lets clients upload files
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
10 over HTTP to an external web server.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12 This module generates URLs that are signed using a HMAC. Any web service that can authenticate
2823
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
13 these URLs can be used.
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
14
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
15 Implementations
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
16 ---------------
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
17
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
18 * [PHP implementation](https://hg.prosody.im/prosody-modules/raw-file/tip/mod_http_upload_external/share.php)
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
19 * [Python3+Flask implementation](https://github.com/horazont/xmpp-http-upload)
3168
73a610c3c7a9 mod_http_external: Link to prosody-filer (Go implementation)
Matthew Wild <mwild1@gmail.com>
parents: 2823
diff changeset
20 * [Go implementation, Prosody Filer](https://github.com/ThomasLeister/prosody-filer)
3189
57332ea0c1c7 mod_http_upload_external/README: Add Perl implementation by Holger to list
Kim Alvefur <zash@zash.se>
parents: 3168
diff changeset
21 * [Perl implementation for nginx](https://github.com/weiss/ngx_http_upload)
2823
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
22
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
23 To implement your own service compatible with this module, check out the implementation notes below
f14bea5da323 mod_http_upload_external: add Python service implementation
Jonas Wielicki <jonas@wielicki.name>
parents: 2334
diff changeset
24 (and if you publish your implementation - let us know!).
2334
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
25
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
26 Configuration
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
27 =============
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
28
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29 Add `"http_upload_external"` to modules_enabled in your global section, or under the host(s) you wish
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30 to use it on.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
31
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
32 External URL
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
33 ------------
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
34
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
35 You need to provide the path to the external service. Ensure it ends with '/'.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
36
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
37 For example, to use the PHP implementation linked above, you might set it to:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
38
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
39 ``` {.lua}
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
40 http_upload_external_base_url = "https://your.example.com/path/to/share.php/"
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
41 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43 Secret
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 ------
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46 Set a long and unpredictable string as your secret. This is so the upload service can verify that
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 the upload comes from mod_http_upload_external, and random strangers can't upload to your server.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 ``` {.lua}
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50 http_upload_external_secret = "this is a secret string!"
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
52
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53 You need to set exactly the same secret string in your external service.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
55 Limits
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
56 ------
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58 A maximum file size can be set by:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
59
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60 ``` {.lua}
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 http_upload_external_file_size_limit = 123 -- bytes
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
62 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
63
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64 Default is 100MB (100\*1024\*1024).
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
65
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
66 Compatibility
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
67 =============
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
68
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 Works with Prosody 0.9.x and later.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
71 Implementation
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 ==============
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
73
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
74 To implement your own external service that is compatible with this module, you need to expose a
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
75 simple API that allows the HTTP GET, HEAD and PUT methods on arbitrary URLs located on your service.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
76
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
77 For example, if http_upload_external_base_url is set to `https://example.com/upload/` then your service
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78 might receive the following requests:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
79
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
80 Upload a new file:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
81
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
82 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
83 PUT https://example.com/upload/foo/bar.jpg?v=49e9309ff543ace93d25be90635ba8e9965c4f23fc885b2d86c947a5d59e55b2
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
84 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
85
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
86 Recipient checks the file size and other headers:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
87
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
88 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
89 HEAD https://example.com/upload/foo/bar.jpg
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
90 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
91
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
92 Recipient downloads the file:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
93
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
94 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
95 GET https://example.com/upload/foo/bar.jpg
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
96 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
97
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
98 The only tricky logic is in validation of the PUT request. Firstly, don't overwrite existing files (return 409 Conflict).
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
99
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
100 Then you need to validate the auth token.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
101
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
102 ### Validating the auth token
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
103
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
104
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
105 | Version | Supports |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
106 |:--------|:--------------------------------------------------------------------------------------------------------|
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
107 | v | Validates only filename and size. Does not support file type restrictions by the XMPP server. |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
108 | v2 | Validates the filename, size and MIME type. This allows the server to implement MIME type restrictions. |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
109
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
110 It is probable that a future v3 will be specified that allows carrying information about the uploader identity, allowing
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
111 the implementation of per-user quotas and limits.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
112
3360
0149954cee37 mod_http_upload_external: Add note about correct behaviour in the presence of multiple versions
Matthew Wild <mwild1@gmail.com>
parents: 3359
diff changeset
113 Implementations may implement one or more versions of the protocol simultaneously. The XMPP server generates the URLs and
0149954cee37 mod_http_upload_external: Add note about correct behaviour in the presence of multiple versions
Matthew Wild <mwild1@gmail.com>
parents: 3359
diff changeset
114 ultimately selects which version will be used.
0149954cee37 mod_http_upload_external: Add note about correct behaviour in the presence of multiple versions
Matthew Wild <mwild1@gmail.com>
parents: 3359
diff changeset
115
0149954cee37 mod_http_upload_external: Add note about correct behaviour in the presence of multiple versions
Matthew Wild <mwild1@gmail.com>
parents: 3359
diff changeset
116 XMPP servers MUST only generate URLs with **one** of the versions listed here. However in case multiple parameters are
0149954cee37 mod_http_upload_external: Add note about correct behaviour in the presence of multiple versions
Matthew Wild <mwild1@gmail.com>
parents: 3359
diff changeset
117 present, upload services MUST **only** use the token from the highest parameter version that they support.
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
118
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
119 #### Version 1 (v)
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
120
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
121 The token will be in the URL query parameter 'v'. If it is absent, fail with 403 Forbidden.
2334
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
122
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
123 Calculate the expected auth token by reading the value of the Content-Length header of the PUT request. E.g. for a 1MB file
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
124 will have a Content-Length of '1048576'. Append this to the uploaded file name, separated by a space (0x20) character.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
125
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
126 For the above example, you would end up with the following string: "foo/bar.jpg 1048576"
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
127
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
128 The auth token is a SHA256 HMAC of this string, using the configured secret as the key. E.g.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
129
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
130 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
131 calculated_auth_token = hmac_sha256("foo/bar.jpg 1048576", "secret string")
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
132 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
133
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
134 If this is not equal to the 'v' parameter provided in the upload URL, reject the upload with 403 Forbidden.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
135
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
136 **Security note:** When comparing `calculated_auth_token` with the token provided in the URL, you must use a constant-time string
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
137 comparison, otherwise an attacker may be able to discover your secret key. Most languages/environments provide such a function, such
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
138 as `hash_equals()` in PHP, `hmac.compare_digest()` in Python, or `ConstantTimeCompare()` from `crypto/subtle` in Go.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
139
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
140 #### Version 2 (v2)
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
141
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
142 The token will be in the URL query parameter 'v2'. If it is absent, fail with 403 Forbidden.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
143
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
144 | Input | Example |Read from |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
145 |:--------------|:------------|:--------------------------------------------------------------------|
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
146 |`file_path` | foo/bar.jpg | The URL of the PUT request, with the service's base prefix removed. |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
147 |`content_size` | 1048576 | Content-Size header |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
148 |`content_type` | image/jpeg | Content-Type header |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
149
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
150 The parameters should be joined into a single string, separated by NUL bytes (`\0`):
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
151
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
152 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
153 signed_string = ( file_path + '\0' + content_size + '\0' + content_type )
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
154 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
155
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
156 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
157 signed_string = "foo/bar.jpg\01048576\0image/jpeg"
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
158 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
159
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
160 The expected auth token is the SHA256 HMAC of this string, using the configured secret key as the key. E.g.:
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
161
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
162 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
163 calculated_auth_token = hmac_sha256(signed_string, "secret string")
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
164 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
165
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
166 If this is not equal to the 'v2' parameter provided in the upload URL, reject the upload with 403 Forbidden.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
167
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
168 **Security note:** When comparing `calculated_auth_token` with the token provided in the URL, you must use a constant-time string
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
169 comparison, otherwise an attacker may be able to discover your secret key. Most languages/environments provide such a function, such
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
170 as `hash_equals()` in PHP, `hmac.compare_digest()` in Python, or `ConstantTimeCompare()` from `crypto/subtle` in Go.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
171
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
172 ### Security considerations
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
173
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
174 #### HTTPS
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
175
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
176 All uploads and downloads should only be over HTTPS. The security of the served content is protected only
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
177 by the uniqueness present in the URLs themselves, and not using HTTPS may leak the URLs and contents to third-parties.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
178
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
179 Implementations should consider including HSTS and HPKP headers, with consent of the administrator.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
180
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
181 #### MIME types
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
182
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
183 If the upload Content-Type header matches any of the following MIME types, it MUST be preserved and included in the Content-Type
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
184 of any GET requests made to download the file:
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
185
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
186 - `image/*`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
187 - `video/*`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
188 - `audio/*`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
189 - `text/plain`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
190
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
191 It is recommended that other MIME types are preserved, but served with the addition of the following header:
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
192
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
193 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
194 Content-Disposition: attachment
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
195 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
196
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
197 This prevents the browser interpreting scripts and other resources that may potentially be malicious.
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
198
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
199 Some browsers may also benefit from explicitly telling them not to try guessing the type of a file:
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
200
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
201 ```
3359
3d01ab6b1186 mod_http_upload_external: Fix typo/copy-paste issues in headers (thanks jonas<U+2019>)
Matthew Wild <mwild1@gmail.com>
parents: 3358
diff changeset
202 X-Content-Type-Options: nosniff
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
203 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
204
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
205 #### Security headers
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
206
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
207 The following headers should be included to provide additional sandboxing of resources, considering the uploaded
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
208 content is not understood or trusted by the upload service:
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
209
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
210 ```
3359
3d01ab6b1186 mod_http_upload_external: Fix typo/copy-paste issues in headers (thanks jonas<U+2019>)
Matthew Wild <mwild1@gmail.com>
parents: 3358
diff changeset
211 Content-Security-Policy: default-src 'none'
3d01ab6b1186 mod_http_upload_external: Fix typo/copy-paste issues in headers (thanks jonas<U+2019>)
Matthew Wild <mwild1@gmail.com>
parents: 3358
diff changeset
212 X-Content-Security-Policy: default-src 'none'
3d01ab6b1186 mod_http_upload_external: Fix typo/copy-paste issues in headers (thanks jonas<U+2019>)
Matthew Wild <mwild1@gmail.com>
parents: 3358
diff changeset
213 X-WebKit-CSP: default-src 'none'
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
214 ```