Alex Vakulenko | f602473 | 2016-01-22 16:52:43 -0800 | [diff] [blame] | 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 |