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 78
