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/*
* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/core_dispatch.h>
#include "bio_local.h"
#include "internal/cryptlib.h"
typedef struct {
OSSL_FUNC_BIO_read_ex_fn *c_bio_read_ex;
OSSL_FUNC_BIO_write_ex_fn *c_bio_write_ex;
OSSL_FUNC_BIO_gets_fn *c_bio_gets;
OSSL_FUNC_BIO_puts_fn *c_bio_puts;
OSSL_FUNC_BIO_ctrl_fn *c_bio_ctrl;
OSSL_FUNC_BIO_up_ref_fn *c_bio_up_ref;
OSSL_FUNC_BIO_free_fn *c_bio_free;
} BIO_CORE_GLOBALS;
static void bio_core_globals_free(void *vbcg)
{
OPENSSL_free(vbcg);
}
static void *bio_core_globals_new(OSSL_LIB_CTX *ctx)
{
return OPENSSL_zalloc(sizeof(BIO_CORE_GLOBALS));
}
static const OSSL_LIB_CTX_METHOD bio_core_globals_method = {
OSSL_LIB_CTX_METHOD_DEFAULT_PRIORITY,
bio_core_globals_new,
bio_core_globals_free,
};
static ossl_inline BIO_CORE_GLOBALS *get_globals(OSSL_LIB_CTX *libctx)
{
return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_BIO_CORE_INDEX,
&bio_core_globals_method);
}
static int bio_core_read_ex(BIO *bio, char *data, size_t data_len,
size_t *bytes_read)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(bio->libctx);
if (bcgbl == NULL || bcgbl->c_bio_read_ex == NULL)
return 0;
return bcgbl->c_bio_read_ex(BIO_get_data(bio), data, data_len, bytes_read);
}
static int bio_core_write_ex(BIO *bio, const char *data, size_t data_len,
size_t *written)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(bio->libctx);
if (bcgbl == NULL || bcgbl->c_bio_write_ex == NULL)
return 0;
return bcgbl->c_bio_write_ex(BIO_get_data(bio), data, data_len, written);
}
static long bio_core_ctrl(BIO *bio, int cmd, long num, void *ptr)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(bio->libctx);
if (bcgbl == NULL || bcgbl->c_bio_ctrl == NULL)
return -1;
return bcgbl->c_bio_ctrl(BIO_get_data(bio), cmd, num, ptr);
}
static int bio_core_gets(BIO *bio, char *buf, int size)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(bio->libctx);
if (bcgbl == NULL || bcgbl->c_bio_gets == NULL)
return -1;
return bcgbl->c_bio_gets(BIO_get_data(bio), buf, size);
}
static int bio_core_puts(BIO *bio, const char *str)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(bio->libctx);
if (bcgbl == NULL || bcgbl->c_bio_puts == NULL)
return -1;
return bcgbl->c_bio_puts(BIO_get_data(bio), str);
}
static int bio_core_new(BIO *bio)
{
BIO_set_init(bio, 1);
return 1;
}
static int bio_core_free(BIO *bio)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(bio->libctx);
if (bcgbl == NULL)
return 0;
BIO_set_init(bio, 0);
bcgbl->c_bio_free(BIO_get_data(bio));
return 1;
}
static const BIO_METHOD corebiometh = {
BIO_TYPE_CORE_TO_PROV,
"BIO to Core filter",
bio_core_write_ex,
NULL,
bio_core_read_ex,
NULL,
bio_core_puts,
bio_core_gets,
bio_core_ctrl,
bio_core_new,
bio_core_free,
NULL,
};
const BIO_METHOD *BIO_s_core(void)
{
return &corebiometh;
}
BIO *BIO_new_from_core_bio(OSSL_LIB_CTX *libctx, OSSL_CORE_BIO *corebio)
{
BIO *outbio;
BIO_CORE_GLOBALS *bcgbl = get_globals(libctx);
/* Check the library context has been initialised with the callbacks */
if (bcgbl == NULL || (bcgbl->c_bio_write_ex == NULL && bcgbl->c_bio_read_ex == NULL))
return NULL;
if ((outbio = BIO_new_ex(libctx, BIO_s_core())) == NULL)
return NULL;
if (!bcgbl->c_bio_up_ref(corebio)) {
BIO_free(outbio);
return NULL;
}
BIO_set_data(outbio, corebio);
return outbio;
}
int ossl_bio_init_core(OSSL_LIB_CTX *libctx, const OSSL_DISPATCH *fns)
{
BIO_CORE_GLOBALS *bcgbl = get_globals(libctx);
if (bcgbl == NULL)
return 0;
for (; fns->function_id != 0; fns++) {
switch (fns->function_id) {
case OSSL_FUNC_BIO_READ_EX:
if (bcgbl->c_bio_read_ex == NULL)
bcgbl->c_bio_read_ex = OSSL_FUNC_BIO_read_ex(fns);
break;
case OSSL_FUNC_BIO_WRITE_EX:
if (bcgbl->c_bio_write_ex == NULL)
bcgbl->c_bio_write_ex = OSSL_FUNC_BIO_write_ex(fns);
break;
case OSSL_FUNC_BIO_GETS:
if (bcgbl->c_bio_gets == NULL)
bcgbl->c_bio_gets = OSSL_FUNC_BIO_gets(fns);
break;
case OSSL_FUNC_BIO_PUTS:
if (bcgbl->c_bio_puts == NULL)
bcgbl->c_bio_puts = OSSL_FUNC_BIO_puts(fns);
break;
case OSSL_FUNC_BIO_CTRL:
if (bcgbl->c_bio_ctrl == NULL)
bcgbl->c_bio_ctrl = OSSL_FUNC_BIO_ctrl(fns);
break;
case OSSL_FUNC_BIO_UP_REF:
if (bcgbl->c_bio_up_ref == NULL)
bcgbl->c_bio_up_ref = OSSL_FUNC_BIO_up_ref(fns);
break;
case OSSL_FUNC_BIO_FREE:
if (bcgbl->c_bio_free == NULL)
bcgbl->c_bio_free = OSSL_FUNC_BIO_free(fns);
break;
}
}
return 1;
}
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