1.\" $OpenBSD: X509_digest.3,v 1.8 2019/08/20 13:27:19 schwarze Exp $ 2.\" full merge up to: OpenSSL 1212818e Sep 11 13:22:14 2018 +0100 3.\" 4.\" This file was written by Rich Salz <rsalz@openssl.org> 5.\" Copyright (c) 2017 The OpenSSL Project. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in 16.\" the documentation and/or other materials provided with the 17.\" distribution. 18.\" 19.\" 3. All advertising materials mentioning features or use of this 20.\" software must display the following acknowledgment: 21.\" "This product includes software developed by the OpenSSL Project 22.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 23.\" 24.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25.\" endorse or promote products derived from this software without 26.\" prior written permission. For written permission, please contact 27.\" openssl-core@openssl.org. 28.\" 29.\" 5. Products derived from this software may not be called "OpenSSL" 30.\" nor may "OpenSSL" appear in their names without prior written 31.\" permission of the OpenSSL Project. 32.\" 33.\" 6. Redistributions of any form whatsoever must retain the following 34.\" acknowledgment: 35.\" "This product includes software developed by the OpenSSL Project 36.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" 37.\" 38.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49.\" OF THE POSSIBILITY OF SUCH DAMAGE. 50.\" 51.Dd $Mdocdate: August 20 2019 $ 52.Dt X509_DIGEST 3 53.Os 54.Sh NAME 55.Nm X509_digest , 56.Nm X509_CRL_digest , 57.Nm X509_pubkey_digest , 58.Nm X509_NAME_digest , 59.Nm X509_REQ_digest , 60.Nm PKCS7_ISSUER_AND_SERIAL_digest 61.Nd get digests of various objects 62.Sh SYNOPSIS 63.In openssl/x509.h 64.Ft int 65.Fo X509_digest 66.Fa "const X509 *data" 67.Fa "const EVP_MD *type" 68.Fa "unsigned char *md" 69.Fa "unsigned int *len" 70.Fc 71.Ft int 72.Fo X509_CRL_digest 73.Fa "const X509_CRL *data" 74.Fa "const EVP_MD *type" 75.Fa "unsigned char *md" 76.Fa "unsigned int *len" 77.Fc 78.Ft int 79.Fo X509_pubkey_digest 80.Fa "const X509 *data" 81.Fa "const EVP_MD *type" 82.Fa "unsigned char *md" 83.Fa "unsigned int *len" 84.Fc 85.Ft int 86.Fo X509_REQ_digest 87.Fa "const X509_REQ *data" 88.Fa "const EVP_MD *type" 89.Fa "unsigned char *md" 90.Fa "unsigned int *len" 91.Fc 92.Ft int 93.Fo X509_NAME_digest 94.Fa "const X509_NAME *data" 95.Fa "const EVP_MD *type" 96.Fa "unsigned char *md" 97.Fa "unsigned int *len" 98.Fc 99.In openssl/pkcs7.h 100.Ft int 101.Fo PKCS7_ISSUER_AND_SERIAL_digest 102.Fa "PKCS7_ISSUER_AND_SERIAL *data" 103.Fa "const EVP_MD *type" 104.Fa "unsigned char *md" 105.Fa "unsigned int *len" 106.Fc 107.Sh DESCRIPTION 108.Fn X509_pubkey_digest 109returns a digest of the DER representation of the public key contained in 110.Fa data . 111All other functions described here return a digest of the DER 112representation of their entire 113.Fa data 114object. 115.Pp 116The 117.Fa type 118parameter specifies the digest to be used, such as 119.Xr EVP_sha1 3 . 120.Fa md 121is a pointer to the buffer where the digest will be copied and is 122assumed to be large enough; a size of at least 123.Dv EVP_MAX_MD_SIZE 124bytes is suggested. 125The 126.Fa len 127parameter, if not 128.Dv NULL , 129points to a place where the digest size will be stored. 130.Sh RETURN VALUES 131These functions return 1 for success or 0 for failure. 132.Sh SEE ALSO 133.Xr EVP_get_digestbyname 3 , 134.Xr X509_cmp 3 , 135.Xr X509_CRL_new 3 , 136.Xr X509_NAME_new 3 , 137.Xr X509_new 3 , 138.Xr X509_REQ_new 3 139.Sh HISTORY 140.Fn X509_digest , 141.Fn X509_NAME_digest , 142and 143.Fn PKCS7_ISSUER_AND_SERIAL_digest 144first appeared in SSLeay 0.6.5 and have been available since 145.Ox 2.4 . 146.Pp 147.Fn X509_CRL_digest 148and 149.Fn X509_REQ_digest 150first appeared in OpenSSL 0.9.6 and have been available since 151.Ox 2.9 . 152.Pp 153.Fn X509_pubkey_digest 154first appeared in OpenSSL 0.9.7 and has been available since 155.Ox 3.2 . 156