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// 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
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