1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* Copyright (c) 2021, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <openssl/base.h>
#include <functional>
#include <memory>
#include <vector>
#include <openssl/span.h>
namespace bssl {
namespace acvp {
// kMaxArgs is the maximum number of arguments (including the function name)
// that an ACVP request can contain.
constexpr size_t kMaxArgs = 8;
// kMaxNameLength is the maximum length of a function name in an ACVP request.
constexpr size_t kMaxNameLength = 30;
// RequestBuffer holds various buffers needed for parsing an ACVP request. It
// can be reused between requests.
class RequestBuffer {
public:
virtual ~RequestBuffer();
static std::unique_ptr<RequestBuffer> New();
};
// ParseArgsFromFd returns a span of arguments, the first of which is the name
// of the requested function, from |fd|. The return values point into |buffer|
// and so must not be used after |buffer| has been freed or reused for a
// subsequent call. It returns an empty span on error, because std::optional
// is still too new.
Span<const Span<const uint8_t>> ParseArgsFromFd(int fd, RequestBuffer *buffer);
// WriteReplyToFd writes a reply to the given file descriptor.
bool WriteReplyToFd(int fd, const std::vector<Span<const uint8_t>> &spans);
// ReplyCallback is the type of a callback that writes a reply to an ACVP
// request.
typedef std::function<bool(const std::vector<Span<const uint8_t>> &)>
ReplyCallback;
// Handler is the type of a function that handles a specific ACVP request. If
// successful it will call |write_reply| with the response arguments and return
// |write_reply|'s return value. Otherwise it will return false. The given args
// must not include the name at the beginning.
typedef bool (*Handler)(const Span<const uint8_t> args[],
ReplyCallback write_reply);
// FindHandler returns a |Handler| that can process the given arguments, or logs
// a reason and returns |nullptr| if none is found.
Handler FindHandler(Span<const Span<const uint8_t>> args);
} // namespace acvp
} // namespace bssl
|
