openssl/crypto/serializer/serializer_lib.c
Richard Levitte 742496f130 SERIALIZER: add functions for serialization to file
These functions are added:

- OSSL_SERIALIZER_to_bio()
- OSSL_SERIALIZER_to_fp() (unless 'no-stdio')

OSSL_SERIALIZER_to_bio() and OSSL_SERIALIZER_to_fp() work as wrapper
functions, and call an internal "do_output" function with the given
serializer context and a BIO to output the serialized result to.

The internal "do_output" function must have intimate knowledge of the
object being output.  This will defined independently with context
creators for specific OpenSSL types.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10394)
2019-11-29 20:55:16 +01:00

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C

/*
* Copyright 2019 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/bio.h>
#include <openssl/serializer.h>
#include "serializer_local.h"
int OSSL_SERIALIZER_to_bio(OSSL_SERIALIZER_CTX *ctx, BIO *out)
{
return ctx->do_output(ctx, out);
}
#ifndef OPENSSL_NO_STDIO
static BIO *bio_from_file(FILE *fp)
{
BIO *b;
if ((b = BIO_new(BIO_s_file())) == NULL) {
ERR_raise(ERR_LIB_OSSL_SERIALIZER, ERR_R_BUF_LIB);
return NULL;
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
return b;
}
int OSSL_SERIALIZER_to_fp(OSSL_SERIALIZER_CTX *ctx, FILE *fp)
{
BIO *b = bio_from_file(fp);
int ret = 0;
if (b != NULL)
ret = OSSL_SERIALIZER_to_bio(ctx, b);
BIO_free(b);
return ret;
}
#endif