.\" $OpenBSD: des_read_pw.3,v 1.10 2020/06/19 17:17:13 schwarze Exp $ .\" OpenSSL doc/crypto/ui_compat.pod May 14 11:28:00 2006 +0000 .\" OpenSSL doc/crypto/des.pod 2a9aca32 Oct 25 08:44:10 2001 +0000 .\" .\" This file was written by Ulf Moeller and .\" Richard Levitte . .\" Copyright (c) 2000, 2001 The OpenSSL Project. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in .\" the documentation and/or other materials provided with the .\" distribution. .\" .\" 3. 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IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: June 19 2020 $ .Dt DES_READ_PW 3 .Os .Sh NAME .Nm des_read_pw , .Nm des_read_pw_string , .Nm EVP_read_pw_string , .Nm EVP_read_pw_string_min .Nd compatibility user interface functions .Sh SYNOPSIS .In openssl/ui_compat.h .Ft int .Fo des_read_pw .Fa "char *buf" .Fa "char *buff" .Fa "int length" .Fa "const char *prompt" .Fa "int verify" .Fc .Ft int .Fo des_read_pw_string .Fa "char *buf" .Fa "int length" .Fa "const char *prompt" .Fa "int verify" .Fc .In openssl/evp.h .Ft int .Fo EVP_read_pw_string .Fa "char *buf" .Fa "int length" .Fa "const char *prompt" .Fa "int verify" .Fc .Ft int .Fo EVP_read_pw_string_min .Fa "char *buf" .Fa "int min_length" .Fa "int length" .Fa "const char *prompt" .Fa "int verify" .Fc .Sh DESCRIPTION These functions are deprecated. Use .Xr UI_UTIL_read_pw 3 instead. .Pp The DES library contained a few routines to prompt for passwords. These aren't necessarily dependent on DES, and have therefore become part of the UI compatibility library. .Pp .Fn des_read_pw writes the string specified by .Fa prompt to standard output, turns echo off, and reads an input string from the terminal. The string is returned in .Fa buf , which must have space for at least .Fa length bytes. If .Fa verify is set, the user is asked for the password twice and unless the two copies match, an error is returned. The second password is stored in .Fa buff , which must therefore also be at least .Fa length bytes. .Pp .Fn des_read_pw_string is a variant of .Fn des_read_pw that provides a buffer if .Fa verify is set. It is available in the MIT Kerberos library as well. If .Fa length exceeds .Dv BUFSIZ , .Fn des_read_pw_string uses .Dv BUFSIZ . .Pp .Fn EVP_read_pw_string and .Fn EVP_read_pw_string_min are functionally similar to .Fn des_read_pw_string . .Fn EVP_read_pw_string_min additionally checks that the password is at least .Fa min_length bytes long. .Sh RETURN VALUES These functions return 0 on success and a negative value on failure. .Pp They return -1 if .Fa length is less than or equal to zero or on memory allocation failure. They return -1 or -2 if the internal call to .Xr UI_process 3 fails. .Pp In addition, .Fa EVP_read_pw_string_min returns -1 if .Fa min_length is negative, if .Fa length is less than or equal to .Fa min_length , or if the user entered a password shorter than .Fa min_length . .Sh SEE ALSO .Xr UI_new 3 , .Xr UI_UTIL_read_pw 3 .Sh HISTORY .Fn des_read_pw_string appeared in SSLeay 0.4 or earlier. .Fn EVP_read_pw_string first appeared in SSLeay 0.5.1. .Fn des_read_pw first appeared in SSLeay 0.8.0. These functions have been available since .Ox 2.4 . .Pp .Fn EVP_read_pw_string_min first appeared in OpenSSL 1.0.0 and has been available since .Ox 4.9 . .Sh AUTHORS .An Richard Levitte Aq Mt richard@levitte.org for the OpenSSL project.