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authorJung-uk Kim <jkim@FreeBSD.org>2020-02-21 00:33:21 +0000
committerJung-uk Kim <jkim@FreeBSD.org>2020-02-21 00:33:21 +0000
commit6b4382c4054d7c169c6140feaa144ca360a90ead (patch)
tree176bf7fdbae226099058e11e9a429805b6e0af42 /secure/lib/libcrypto/man/man3/ASN1_STRING_print_ex.3
parent24722aacdb06a5ac6780beef7db856a0f99095c3 (diff)
downloadsrc-6b4382c4054d7c169c6140feaa144ca360a90ead.tar.gz
src-6b4382c4054d7c169c6140feaa144ca360a90ead.zip
MFC: r356963
Install man5 and man7 for OpenSSL.
Notes
Notes: svn path=/stable/12/; revision=358188
Diffstat (limited to 'secure/lib/libcrypto/man/man3/ASN1_STRING_print_ex.3')
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+.\" ========================================================================
+.\"
+.IX Title "ASN1_STRING_PRINT_EX 3"
+.TH ASN1_STRING_PRINT_EX 3 "2019-09-10" "1.1.1d" "OpenSSL"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+ASN1_tag2str, ASN1_STRING_print_ex, ASN1_STRING_print_ex_fp, ASN1_STRING_print \&\- ASN1_STRING output routines
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/asn1.h>
+\&
+\& int ASN1_STRING_print_ex(BIO *out, const ASN1_STRING *str, unsigned long flags);
+\& int ASN1_STRING_print_ex_fp(FILE *fp, const ASN1_STRING *str, unsigned long flags);
+\& int ASN1_STRING_print(BIO *out, const ASN1_STRING *str);
+\&
+\& const char *ASN1_tag2str(int tag);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+These functions output an \fB\s-1ASN1_STRING\s0\fR structure. \fB\s-1ASN1_STRING\s0\fR is used to
+represent all the \s-1ASN1\s0 string types.
+.PP
+\&\fBASN1_STRING_print_ex()\fR outputs \fBstr\fR to \fBout\fR, the format is determined by
+the options \fBflags\fR. \fBASN1_STRING_print_ex_fp()\fR is identical except it outputs
+to \fBfp\fR instead.
+.PP
+\&\fBASN1_STRING_print()\fR prints \fBstr\fR to \fBout\fR but using a different format to
+\&\fBASN1_STRING_print_ex()\fR. It replaces unprintable characters (other than \s-1CR, LF\s0)
+with '.'.
+.PP
+\&\fBASN1_tag2str()\fR returns a human-readable name of the specified \s-1ASN.1\s0 \fBtag\fR.
+.SH "NOTES"
+.IX Header "NOTES"
+\&\fBASN1_STRING_print()\fR is a deprecated function which should be avoided; use
+\&\fBASN1_STRING_print_ex()\fR instead.
+.PP
+Although there are a large number of options frequently \fB\s-1ASN1_STRFLGS_RFC2253\s0\fR is
+suitable, or on \s-1UTF8\s0 terminals \fB\s-1ASN1_STRFLGS_RFC2253 &\s0 ~ASN1_STRFLGS_ESC_MSB\fR.
+.PP
+The complete set of supported options for \fBflags\fR is listed below.
+.PP
+Various characters can be escaped. If \fB\s-1ASN1_STRFLGS_ESC_2253\s0\fR is set the characters
+determined by \s-1RFC2253\s0 are escaped. If \fB\s-1ASN1_STRFLGS_ESC_CTRL\s0\fR is set control
+characters are escaped. If \fB\s-1ASN1_STRFLGS_ESC_MSB\s0\fR is set characters with the
+\&\s-1MSB\s0 set are escaped: this option should \fBnot\fR be used if the terminal correctly
+interprets \s-1UTF8\s0 sequences.
+.PP
+Escaping takes several forms.
+.PP
+If the character being escaped is a 16 bit character then the form \*(L"\eUXXXX\*(R" is used
+using exactly four characters for the hex representation. If it is 32 bits then
+\&\*(L"\eWXXXXXXXX\*(R" is used using eight characters of its hex representation. These forms
+will only be used if \s-1UTF8\s0 conversion is not set (see below).
+.PP
+Printable characters are normally escaped using the backslash '\e' character. If
+\&\fB\s-1ASN1_STRFLGS_ESC_QUOTE\s0\fR is set then the whole string is instead surrounded by
+double quote characters: this is arguably more readable than the backslash
+notation. Other characters use the \*(L"\eXX\*(R" using exactly two characters of the hex
+representation.
+.PP
+If \fB\s-1ASN1_STRFLGS_UTF8_CONVERT\s0\fR is set then characters are converted to \s-1UTF8\s0
+format first. If the terminal supports the display of \s-1UTF8\s0 sequences then this
+option will correctly display multi byte characters.
+.PP
+If \fB\s-1ASN1_STRFLGS_IGNORE_TYPE\s0\fR is set then the string type is not interpreted at
+all: everything is assumed to be one byte per character. This is primarily for
+debugging purposes and can result in confusing output in multi character strings.
+.PP
+If \fB\s-1ASN1_STRFLGS_SHOW_TYPE\s0\fR is set then the string type itself is printed out
+before its value (for example \*(L"\s-1BMPSTRING\*(R"\s0), this actually uses \fBASN1_tag2str()\fR.
+.PP
+The content of a string instead of being interpreted can be \*(L"dumped\*(R": this just
+outputs the value of the string using the form #XXXX using hex format for each
+octet.
+.PP
+If \fB\s-1ASN1_STRFLGS_DUMP_ALL\s0\fR is set then any type is dumped.
+.PP
+Normally non character string types (such as \s-1OCTET STRING\s0) are assumed to be
+one byte per character, if \fB\s-1ASN1_STRFLGS_DUMP_UNKNOWN\s0\fR is set then they will
+be dumped instead.
+.PP
+When a type is dumped normally just the content octets are printed, if
+\&\fB\s-1ASN1_STRFLGS_DUMP_DER\s0\fR is set then the complete encoding is dumped
+instead (including tag and length octets).
+.PP
+\&\fB\s-1ASN1_STRFLGS_RFC2253\s0\fR includes all the flags required by \s-1RFC2253.\s0 It is
+equivalent to:
+ \s-1ASN1_STRFLGS_ESC_2253\s0 | \s-1ASN1_STRFLGS_ESC_CTRL\s0 | \s-1ASN1_STRFLGS_ESC_MSB\s0 |
+ \s-1ASN1_STRFLGS_UTF8_CONVERT\s0 | \s-1ASN1_STRFLGS_DUMP_UNKNOWN ASN1_STRFLGS_DUMP_DER\s0
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fBASN1_STRING_print_ex()\fR and \fBASN1_STRING_print_ex_fp()\fR return the number of
+characters written or \-1 if an error occurred.
+.PP
+\&\fBASN1_STRING_print()\fR returns 1 on success or 0 on error.
+.PP
+\&\fBASN1_tag2str()\fR returns a human-readable name of the specified \s-1ASN.1\s0 \fBtag\fR.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBX509_NAME_print_ex\fR\|(3),
+\&\fBASN1_tag2str\fR\|(3)
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright 2002\-2018 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
+this file except in compliance with the License. You can obtain a copy
+in the file \s-1LICENSE\s0 in the source distribution or at
+<https://www.openssl.org/source/license.html>.