1.\" $OpenBSD: RSA_sign_ASN1_OCTET_STRING.3,v 1.7 2019/06/10 14:58:48 schwarze Exp $ 2.\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100 3.\" 4.\" This file was written by Ulf Moeller <ulf@openssl.org>. 5.\" Copyright (c) 2000 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: June 10 2019 $ 52.Dt RSA_SIGN_ASN1_OCTET_STRING 3 53.Os 54.Sh NAME 55.Nm RSA_sign_ASN1_OCTET_STRING , 56.Nm RSA_verify_ASN1_OCTET_STRING 57.Nd RSA signatures 58.Sh SYNOPSIS 59.In openssl/rsa.h 60.Ft int 61.Fo RSA_sign_ASN1_OCTET_STRING 62.Fa "int dummy" 63.Fa "unsigned char *m" 64.Fa "unsigned int m_len" 65.Fa "unsigned char *sigret" 66.Fa "unsigned int *siglen" 67.Fa "RSA *rsa" 68.Fc 69.Ft int 70.Fo RSA_verify_ASN1_OCTET_STRING 71.Fa "int dummy" 72.Fa "unsigned char *m" 73.Fa "unsigned int m_len" 74.Fa "unsigned char *sigbuf" 75.Fa "unsigned int siglen" 76.Fa "RSA *rsa" 77.Fc 78.Sh DESCRIPTION 79.Fn RSA_sign_ASN1_OCTET_STRING 80signs the octet string 81.Fa m 82of size 83.Fa m_len 84using the private key 85.Fa rsa 86represented in DER using PKCS #1 padding. 87It stores the signature in 88.Fa sigret 89and the signature size in 90.Fa siglen . 91.Fa sigret 92must point to 93.Fn RSA_size rsa 94bytes of memory. 95.Pp 96.Fa dummy 97is ignored. 98.Pp 99.Fn RSA_verify_ASN1_OCTET_STRING 100verifies that the signature 101.Fa sigbuf 102of size 103.Fa siglen 104is the DER representation of a given octet string 105.Fa m 106of size 107.Fa m_len . 108.Fa dummy 109is ignored. 110.Fa rsa 111is the signer's public key. 112.Sh RETURN VALUES 113.Fn RSA_sign_ASN1_OCTET_STRING 114returns 1 on success or 0 otherwise. 115.Fn RSA_verify_ASN1_OCTET_STRING 116returns 1 on successful verification or 0 otherwise. 117.Pp 118The error codes can be obtained by 119.Xr ERR_get_error 3 . 120.Sh SEE ALSO 121.Xr RSA_new 3 , 122.Xr RSA_sign 3 , 123.Xr RSA_verify 3 124.Sh HISTORY 125.Fn RSA_sign_ASN1_OCTET_STRING 126and 127.Fn RSA_verify_ASN1_OCTET_STRING 128first appeared in SSLeay 0.8.0 and have been available since 129.Ox 2.4 . 130.Sh BUGS 131These functions serve no recognizable purpose. 132