mirror of https://github.com/openssl/openssl
75 lines
2.2 KiB
Plaintext
75 lines
2.2 KiB
Plaintext
=pod
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=head1 NAME
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OSSL_DECODER_CTX,
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OSSL_DECODER_CTX_new,
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OSSL_DECODER_settable_ctx_params,
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OSSL_DECODER_CTX_set_params,
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OSSL_DECODER_CTX_free
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- Encoder context routines
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=head1 SYNOPSIS
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#include <openssl/decoder.h>
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typedef struct ossl_decoder_ctx_st OSSL_DECODER_CTX;
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OSSL_DECODER_CTX *OSSL_DECODER_CTX_new(OPENSSL_CTX *libctx);
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const OSSL_PARAM *OSSL_DECODER_settable_ctx_params(OSSL_DECODER *decoder);
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int OSSL_DECODER_CTX_set_params(OSSL_DECODER_CTX *ctx,
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const OSSL_PARAM params[]);
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void OSSL_DECODER_CTX_free(OSSL_DECODER_CTX *ctx);
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=head1 DESCRIPTION
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B<OSSL_DECODER_CTX> is a context with which B<OSSL_DECODER>
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operations are performed. The context typically holds values, both
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internal and supplied by the application, which are useful for the
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implementations supplied by providers.
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OSSL_DECODER_CTX_new() creates a new empty B<OSSL_DECODER_CTX>.
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OSSL_DECODER_settable_ctx_params() returns an L<OSSL_PARAM(3)>
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array of parameter descriptors.
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OSSL_DECODER_CTX_set_params() attempts to set parameters specified
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with an L<OSSL_PARAM(3)> array I<params>. These parameters are passed
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to all decoders that have been added to the I<ctx> so far.
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Parameters that an implementation doesn't recognise should be ignored
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by it.
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OSSL_DECODER_CTX_free() frees the given context I<ctx>.
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=head1 RETURN VALUES
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OSSL_DECODER_CTX_new() returns a pointer to a
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B<OSSL_DECODER_CTX>, or NULL if the context structure couldn't be
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allocated.
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OSSL_DECODER_settable_ctx_params() returns an L<OSSL_PARAM(3)>
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array, or NULL if none is available.
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OSSL_DECODER_CTX_set_params() returns 1 if all recognised
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parameters were valid, or 0 if one of them was invalid or caused some
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other failure in the implementation.
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=head1 SEE ALSO
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L<provider(7)>, L<OSSL_DECODER(3)>, L<OSSL_DECODER_from_bio(3)>
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=head1 HISTORY
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The functions described here were added in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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