Mercurial > prosody-modules

annotate mod_http_upload_external/README.markdown @ 4282:281a864e7472

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_pubsub_feeds: Don't skip publishing items after an existing one I encountered a feed which was backwards, such that older entries were considered first and then it would skip newer entries. This may however run into trouble if the feed contains more items than what's persisted in pubsub.
author Kim Alvefur <zash@zash.se>
date Mon, 30 Nov 2020 15:17:29 +0100
parents 5741e6511f3d
children 16995e7624f0
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
3959
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
29 The module can be added as a new Component definition:
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
30
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
31 ``` {.lua}
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
32 Component "upload.example.org" "http_upload_external"
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
33 http_upload_external_base_url = "https://your.example.com/upload/service"
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
34 http_upload_external_secret = "your shared secret"
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
35 ```
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
36
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
37 It should **not** be added to modules_enabled.
5741e6511f3d mod_http_upload_external: Discourage loading via modules_enabled
Kim Alvefur <zash@zash.se>
parents: 3360
diff changeset
38
2334
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
39
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
40 External URL
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 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
44
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 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
46
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 ``` {.lua}
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 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
49 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 Secret
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
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54 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
55 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
56
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57 ``` {.lua}
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58 http_upload_external_secret = "this is a secret string!"
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
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 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
62
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
63 Limits
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64 ------
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 A maximum file size can be set by:
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 ``` {.lua}
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 http_upload_external_file_size_limit = 123 -- bytes
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
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 Default is 100MB (100\*1024\*1024).
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 Compatibility
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
75 =============
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 Works with Prosody 0.9.x and later.
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
79 Implementation
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
80 ==============
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 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
83 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
84
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
85 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
86 might receive the following requests:
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 Upload a new file:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
89
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 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
92 ```
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 Recipient checks the file size and other headers:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
95
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 HEAD https://example.com/upload/foo/bar.jpg
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
98 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
99
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
100 Recipient downloads the file:
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
101
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
102 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
103 GET https://example.com/upload/foo/bar.jpg
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
104 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
105
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
106 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
107
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
108 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
109
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
110 ### Validating the auth token
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
111
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
112
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
113 | Version | Supports |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
114 |:--------|:--------------------------------------------------------------------------------------------------------|
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
115 | 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
116 | 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
117
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
118 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
119 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
120
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
121 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
122 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
123
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
124 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
125 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
126
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
127 #### Version 1 (v)
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
128
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
129 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
130
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
131 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
132 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
133
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
134 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
135
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
136 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
137
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
138 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 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
140 ```
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
141
c728b2f77c7c mod_http_upload_external: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
142 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
143
3358
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
144 **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
145 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
146 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
147
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
148 #### Version 2 (v2)
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 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
151
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
152 | Input | Example |Read from |
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
153 |:--------------|:------------|:--------------------------------------------------------------------|
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
154 |`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
155 |`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
156 |`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
157
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
158 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
159
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
160 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
161 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
162 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
163
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 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
166 ```
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 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
169
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
170 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
171 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
172 ```
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 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
175
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
176 **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
177 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
178 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
179
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
180 ### Security considerations
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
181
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
182 #### HTTPS
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
183
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
184 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
185 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
186
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
187 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
188
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
189 #### MIME types
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 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
192 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
193
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
194 - `image/*`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
195 - `video/*`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
196 - `audio/*`
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
197 - `text/plain`
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 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
200
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
201 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
202 Content-Disposition: attachment
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 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
206
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
207 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
208
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
209 ```
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
210 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
211 ```
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
212
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
213 #### Security headers
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
214
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
215 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
216 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
217
e49660ba3161 mod_http_upload_external: Improve implementation docs, including v2 details
Matthew Wild <mwild1@gmail.com>
parents: 3189
diff changeset
218 ```
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
219 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
220 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
221 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
222 ```