| 1 | =pod
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | EVP_MD-common - The OpenSSL EVP_MD implementations, common things
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| 6 |
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| 7 | =head1 DESCRIPTION
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| 8 |
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| 9 | All the OpenSSL EVP_MD implementations understand the following
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| 10 | L<OSSL_PARAM(3)> entries that are
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| 11 | gettable with L<EVP_MD_get_params(3)>, as well as these:
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| 12 |
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| 13 | =over 4
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| 14 |
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| 15 | =item "blocksize" (B<OSSL_DIGEST_PARAM_BLOCK_SIZE>) <unsigned integer>
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| 16 |
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| 17 | The digest block size.
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| 18 | The length of the "blocksize" parameter should not exceed that of a
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| 19 | B<size_t>.
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| 20 |
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| 21 | This value can also be retrieved with L<EVP_MD_get_block_size(3)>.
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| 22 |
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| 23 | =item "size" (B<OSSL_DIGEST_PARAM_SIZE>) <unsigned integer>
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| 24 |
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| 25 | The digest output size.
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| 26 | The length of the "size" parameter should not exceed that of a B<size_t>.
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| 27 |
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| 28 | This value can also be retrieved with L<EVP_MD_get_size(3)>.
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| 29 |
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| 30 | =item "flags" (B<OSSL_DIGEST_PARAM_FLAGS>) <unsigned integer>
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| 31 |
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| 32 | Diverse flags that describe exceptional behaviour for the digest.
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| 33 | These flags are described in L<EVP_MD_meth_set_flags(3)/DESCRIPTION>.
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| 34 |
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| 35 | The length of the "flags" parameter should equal that of an
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| 36 | B<unsigned long int>.
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| 37 |
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| 38 | =begin comment
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| 39 |
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| 40 | The description of these flags should probably be moved. Also,
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| 41 | EVP_MD_FLAG_FIPS isn't relevant any more.
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| 42 |
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| 43 | =end comment
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| 44 |
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| 45 | This value can also be retrieved with L<EVP_MD_get_flags(3)>.
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| 46 |
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| 47 | =back
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| 48 |
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| 49 | =head1 SEE ALSO
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| 50 |
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| 51 | L<EVP_MD_get_params(3)>, L<provider-digest(7)>
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| 52 |
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| 53 | =head1 COPYRIGHT
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| 54 |
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| 55 | Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 56 |
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| 57 | Licensed under the Apache License 2.0 (the "License"). You may not use
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| 58 | this file except in compliance with the License. You can obtain a copy
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| 59 | in the file LICENSE in the source distribution or at
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| 60 | L<https://www.openssl.org/source/license.html>.
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| 61 |
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| 62 | =cut
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