1*b077aed3SPierre Pronchery=pod 2*b077aed3SPierre Pronchery 3*b077aed3SPierre Pronchery=head1 NAME 4*b077aed3SPierre Pronchery 5*b077aed3SPierre ProncheryEVP_MD-common - The OpenSSL EVP_MD implementations, common things 6*b077aed3SPierre Pronchery 7*b077aed3SPierre Pronchery=head1 DESCRIPTION 8*b077aed3SPierre Pronchery 9*b077aed3SPierre ProncheryAll the OpenSSL EVP_MD implementations understand the following 10*b077aed3SPierre ProncheryL<OSSL_PARAM(3)> entries that are 11*b077aed3SPierre Proncherygettable with L<EVP_MD_get_params(3)>, as well as these: 12*b077aed3SPierre Pronchery 13*b077aed3SPierre Pronchery=over 4 14*b077aed3SPierre Pronchery 15*b077aed3SPierre Pronchery=item "blocksize" (B<OSSL_DIGEST_PARAM_BLOCK_SIZE>) <unsigned integer> 16*b077aed3SPierre Pronchery 17*b077aed3SPierre ProncheryThe digest block size. 18*b077aed3SPierre ProncheryThe length of the "blocksize" parameter should not exceed that of a 19*b077aed3SPierre ProncheryB<size_t>. 20*b077aed3SPierre Pronchery 21*b077aed3SPierre ProncheryThis value can also be retrieved with L<EVP_MD_get_block_size(3)>. 22*b077aed3SPierre Pronchery 23*b077aed3SPierre Pronchery=item "size" (B<OSSL_DIGEST_PARAM_SIZE>) <unsigned integer> 24*b077aed3SPierre Pronchery 25*b077aed3SPierre ProncheryThe digest output size. 26*b077aed3SPierre ProncheryThe length of the "size" parameter should not exceed that of a B<size_t>. 27*b077aed3SPierre Pronchery 28*b077aed3SPierre ProncheryThis value can also be retrieved with L<EVP_MD_get_size(3)>. 29*b077aed3SPierre Pronchery 30*b077aed3SPierre Pronchery=item "flags" (B<OSSL_DIGEST_PARAM_FLAGS>) <unsigned integer> 31*b077aed3SPierre Pronchery 32*b077aed3SPierre ProncheryDiverse flags that describe exceptional behaviour for the digest. 33*b077aed3SPierre ProncheryThese flags are described in L<EVP_MD_meth_set_flags(3)/DESCRIPTION>. 34*b077aed3SPierre Pronchery 35*b077aed3SPierre ProncheryThe length of the "flags" parameter should equal that of an 36*b077aed3SPierre ProncheryB<unsigned long int>. 37*b077aed3SPierre Pronchery 38*b077aed3SPierre Pronchery=begin comment 39*b077aed3SPierre Pronchery 40*b077aed3SPierre ProncheryThe description of these flags should probably be moved. Also, 41*b077aed3SPierre ProncheryEVP_MD_FLAG_FIPS isn't relevant any more. 42*b077aed3SPierre Pronchery 43*b077aed3SPierre Pronchery=end comment 44*b077aed3SPierre Pronchery 45*b077aed3SPierre ProncheryThis value can also be retrieved with L<EVP_MD_get_flags(3)>. 46*b077aed3SPierre Pronchery 47*b077aed3SPierre Pronchery=back 48*b077aed3SPierre Pronchery 49*b077aed3SPierre Pronchery=head1 SEE ALSO 50*b077aed3SPierre Pronchery 51*b077aed3SPierre ProncheryL<EVP_MD_get_params(3)>, L<provider-digest(7)> 52*b077aed3SPierre Pronchery 53*b077aed3SPierre Pronchery=head1 COPYRIGHT 54*b077aed3SPierre Pronchery 55*b077aed3SPierre ProncheryCopyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. 56*b077aed3SPierre Pronchery 57*b077aed3SPierre ProncheryLicensed under the Apache License 2.0 (the "License"). You may not use 58*b077aed3SPierre Proncherythis file except in compliance with the License. You can obtain a copy 59*b077aed3SPierre Proncheryin the file LICENSE in the source distribution or at 60*b077aed3SPierre ProncheryL<https://www.openssl.org/source/license.html>. 61*b077aed3SPierre Pronchery 62*b077aed3SPierre Pronchery=cut 63