diff options
Diffstat (limited to 'crypto/openssl_bio_string.cc')
-rw-r--r-- | crypto/openssl_bio_string.cc | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/crypto/openssl_bio_string.cc b/crypto/openssl_bio_string.cc new file mode 100644 index 0000000000..48805001ef --- /dev/null +++ b/crypto/openssl_bio_string.cc @@ -0,0 +1,77 @@ +// Copyright 2014 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "crypto/openssl_bio_string.h" + +#include <openssl/bio.h> +#include <string.h> + +namespace crypto { + +namespace { + +int bio_string_write(BIO* bio, const char* data, int len) { + reinterpret_cast<std::string*>(bio->ptr)->append(data, len); + return len; +} + +int bio_string_puts(BIO* bio, const char* data) { + // Note: unlike puts(), BIO_puts does not add a newline. + return bio_string_write(bio, data, strlen(data)); +} + +long bio_string_ctrl(BIO* bio, int cmd, long num, void* ptr) { + std::string* str = reinterpret_cast<std::string*>(bio->ptr); + switch (cmd) { + case BIO_CTRL_RESET: + str->clear(); + return 1; + case BIO_C_FILE_SEEK: + return -1; + case BIO_C_FILE_TELL: + return str->size(); + case BIO_CTRL_FLUSH: + return 1; + default: + return 0; + } +} + +int bio_string_new(BIO* bio) { + bio->ptr = NULL; + bio->init = 0; + return 1; +} + +int bio_string_free(BIO* bio) { + // The string is owned by the caller, so there's nothing to do here. + return bio != NULL; +} + +BIO_METHOD bio_string_methods = { + // TODO(mattm): Should add some type number too? (bio.h uses 1-24) + BIO_TYPE_SOURCE_SINK, + "bio_string", + bio_string_write, + NULL, /* read */ + bio_string_puts, + NULL, /* gets */ + bio_string_ctrl, + bio_string_new, + bio_string_free, + NULL, /* callback_ctrl */ +}; + +} // namespace + +BIO* BIO_new_string(std::string* out) { + BIO* bio = BIO_new(&bio_string_methods); + if (!bio) + return bio; + bio->ptr = out; + bio->init = 1; + return bio; +} + +} // namespace crypto |