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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "crypto/openssl_bio_string.h" | |
6 | |
7 #include <openssl/bio.h> | |
8 #include <string.h> | |
9 | |
10 namespace crypto { | |
11 | |
12 namespace { | |
13 | |
14 int bio_string_write(BIO* bio, const char* data, int len) { | |
15 reinterpret_cast<std::string*>(bio->ptr)->append(data, len); | |
16 return len; | |
17 } | |
18 | |
19 int bio_string_puts(BIO* bio, const char* data) { | |
20 // Note: unlike puts(), BIO_puts does not add a newline. | |
21 return bio_string_write(bio, data, strlen(data)); | |
22 } | |
23 | |
24 long bio_string_ctrl(BIO* bio, int cmd, long num, void* ptr) { | |
25 std::string* str = reinterpret_cast<std::string*>(bio->ptr); | |
26 switch (cmd) { | |
27 case BIO_CTRL_RESET: | |
28 str->clear(); | |
29 return 1; | |
30 case BIO_C_FILE_SEEK: | |
31 return -1; | |
32 case BIO_C_FILE_TELL: | |
33 return str->size(); | |
34 case BIO_CTRL_FLUSH: | |
35 return 1; | |
36 default: | |
37 return 0; | |
38 } | |
39 } | |
40 | |
41 int bio_string_new(BIO* bio) { | |
42 bio->ptr = NULL; | |
43 bio->init = 0; | |
44 return 1; | |
45 } | |
46 | |
47 int bio_string_free(BIO* bio) { | |
48 // The string is owned by the caller, so there's nothing to do here. | |
49 return bio != NULL; | |
50 } | |
51 | |
52 BIO_METHOD bio_string_methods = { | |
53 // TODO(mattm): Should add some type number too? (bio.h uses 1-24) | |
54 BIO_TYPE_SOURCE_SINK, | |
55 "bio_string", | |
56 bio_string_write, | |
57 NULL, /* read */ | |
58 bio_string_puts, | |
59 NULL, /* gets */ | |
60 bio_string_ctrl, | |
61 bio_string_new, | |
62 bio_string_free, | |
63 NULL, /* callback_ctrl */ | |
64 }; | |
65 | |
66 } // namespace | |
67 | |
68 BIO* BIO_new_string(std::string* out) { | |
69 BIO* bio = BIO_new(&bio_string_methods); | |
70 if (!bio) | |
71 return bio; | |
72 bio->ptr = out; | |
73 bio->init = 1; | |
74 return bio; | |
75 } | |
76 | |
77 } // namespace crypto | |
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