| 1 | =pod
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | CMS_digest_create_ex, CMS_digest_create
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| 6 | - Create CMS DigestedData object
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| 7 |
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| 8 | =head1 SYNOPSIS
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| 9 |
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| 10 | #include <openssl/cms.h>
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| 11 |
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| 12 | CMS_ContentInfo *CMS_digest_create_ex(BIO *in, const EVP_MD *md,
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| 13 | unsigned int flags, OSSL_LIB_CTX *ctx,
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| 14 | const char *propq);
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| 15 |
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| 16 | CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
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| 17 | unsigned int flags);
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| 18 |
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| 19 | =head1 DESCRIPTION
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| 20 |
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| 21 | CMS_digest_create_ex() creates a B<CMS_ContentInfo> structure
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| 22 | with a type B<NID_pkcs7_digest>. The data supplied via the I<in> BIO is digested
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| 23 | using I<md>. The library context I<libctx> and the property query I<propq> are
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| 24 | used when retrieving algorithms from providers.
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| 25 | The I<flags> field supports the B<CMS_DETACHED> and B<CMS_STREAM> flags,
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| 26 | Internally CMS_final() is called unless B<CMS_STREAM> is specified.
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| 27 |
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| 28 | The B<CMS_ContentInfo> structure can be freed using L<CMS_ContentInfo_free(3)>.
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| 29 |
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| 30 | CMS_digest_create() is similar to CMS_digest_create_ex()
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| 31 | but uses default values of NULL for the library context I<libctx> and the
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| 32 | property query I<propq>.
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| 33 |
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| 34 |
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| 35 | =head1 RETURN VALUES
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| 36 |
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| 37 | If the allocation fails, CMS_digest_create_ex() and CMS_digest_create()
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| 38 | return NULL and set an error code that can be obtained by L<ERR_get_error(3)>.
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| 39 | Otherwise they return a pointer to the newly allocated structure.
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| 40 |
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| 41 | =head1 SEE ALSO
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| 42 |
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| 43 | L<ERR_get_error(3)>, L<CMS_final(3)>>
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| 44 |
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| 45 | =head1 HISTORY
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| 46 |
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| 47 | The CMS_digest_create_ex() method was added in OpenSSL 3.0.
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| 48 |
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| 49 | =head1 COPYRIGHT
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| 50 |
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| 51 | Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 52 |
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| 53 | Licensed under the Apache License 2.0 (the "License"). You may not use
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| 54 | this file except in compliance with the License. You can obtain a copy
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| 55 | in the file LICENSE in the source distribution or at
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| 56 | L<https://www.openssl.org/source/license.html>.
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| 57 |
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| 58 | =cut
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