1*b077aed3SPierre Pronchery=pod 2*b077aed3SPierre Pronchery 3*b077aed3SPierre Pronchery=head1 NAME 4*b077aed3SPierre Pronchery 5*b077aed3SPierre ProncheryEVP_MD-MD5-SHA1 - The MD5-SHA1 EVP_MD implementation 6*b077aed3SPierre Pronchery 7*b077aed3SPierre Pronchery=head1 DESCRIPTION 8*b077aed3SPierre Pronchery 9*b077aed3SPierre ProncherySupport for computing MD5-SHA1 digests through the B<EVP_MD> API. 10*b077aed3SPierre Pronchery 11*b077aed3SPierre ProncheryMD5-SHA1 is a rather special digest that's used with SSLv3. 12*b077aed3SPierre Pronchery 13*b077aed3SPierre Pronchery=head2 Identity 14*b077aed3SPierre Pronchery 15*b077aed3SPierre ProncheryThis implementation is only available with the default provider, and is 16*b077aed3SPierre Proncheryidentified with the name "MD5-SHA1". 17*b077aed3SPierre Pronchery 18*b077aed3SPierre Pronchery=head2 Gettable Parameters 19*b077aed3SPierre Pronchery 20*b077aed3SPierre ProncheryThis implementation supports the common gettable parameters described 21*b077aed3SPierre Proncheryin L<EVP_MD-common(7)>. 22*b077aed3SPierre Pronchery 23*b077aed3SPierre Pronchery=head2 Settable Context Parameters 24*b077aed3SPierre Pronchery 25*b077aed3SPierre ProncheryThis implementation supports the following L<OSSL_PARAM(3)> entries, 26*b077aed3SPierre Proncherysettable for an B<EVP_MD_CTX> with L<EVP_MD_CTX_set_params(3)>: 27*b077aed3SPierre Pronchery 28*b077aed3SPierre Pronchery=over 4 29*b077aed3SPierre Pronchery 30*b077aed3SPierre Pronchery=item "ssl3-ms" (B<OSSL_DIGEST_PARAM_SSL3_MS>) <octet string> 31*b077aed3SPierre Pronchery 32*b077aed3SPierre ProncheryThis parameter is set by libssl in order to calculate a signature hash for an 33*b077aed3SPierre ProncherySSLv3 CertificateVerify message as per RFC6101. 34*b077aed3SPierre ProncheryIt is only set after all handshake messages have already been digested via 35*b077aed3SPierre ProncheryOP_digest_update() calls. 36*b077aed3SPierre ProncheryThe parameter provides the master secret value to be added to the digest. 37*b077aed3SPierre ProncheryThe digest implementation should calculate the complete digest as per RFC6101 38*b077aed3SPierre Proncherysection 5.6.8. 39*b077aed3SPierre ProncheryThe next call after setting this parameter should be OP_digest_final(). 40*b077aed3SPierre Pronchery 41*b077aed3SPierre Pronchery=back 42*b077aed3SPierre Pronchery 43*b077aed3SPierre Pronchery=head1 SEE ALSO 44*b077aed3SPierre Pronchery 45*b077aed3SPierre ProncheryL<EVP_MD_CTX_set_params(3)>, L<provider-digest(7)>, L<OSSL_PROVIDER-default(7)> 46*b077aed3SPierre Pronchery 47*b077aed3SPierre Pronchery=head1 COPYRIGHT 48*b077aed3SPierre Pronchery 49*b077aed3SPierre ProncheryCopyright 2020 The OpenSSL Project Authors. All Rights Reserved. 50*b077aed3SPierre Pronchery 51*b077aed3SPierre ProncheryLicensed under the Apache License 2.0 (the "License"). You may not use 52*b077aed3SPierre Proncherythis file except in compliance with the License. You can obtain a copy 53*b077aed3SPierre Proncheryin the file LICENSE in the source distribution or at 54*b077aed3SPierre ProncheryL<https://www.openssl.org/source/license.html>. 55*b077aed3SPierre Pronchery 56*b077aed3SPierre Pronchery=cut 57