.\" $OpenBSD: X509_NAME_print_ex.3,v 1.12 2021/11/11 15:58:49 schwarze Exp $ .\" full merge up to: OpenSSL aebb9aac Jul 19 09:27:53 2016 -0400 .\" selective merge up to: OpenSSL 61f805c1 Jan 16 01:01:46 2018 +0800 .\" .\" This file was written by Dr. Stephen Henson . .\" Copyright (c) 2002, 2004, 2007, 2016, 2017 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: November 11 2021 $ .Dt X509_NAME_PRINT_EX 3 .Os .Sh NAME .Nm X509_NAME_print_ex , .Nm X509_NAME_print_ex_fp , .Nm X509_NAME_oneline , .Nm X509_NAME_print .Nd X509_NAME printing routines .Sh SYNOPSIS .In openssl/x509.h .Ft int .Fo X509_NAME_print_ex .Fa "BIO *out" .Fa "const X509_NAME *nm" .Fa "int indent" .Fa "unsigned long flags" .Fc .Ft int .Fo X509_NAME_print_ex_fp .Fa "FILE *fp" .Fa "const X509_NAME *nm" .Fa "int indent" .Fa "unsigned long flags" .Fc .Ft char * .Fo X509_NAME_oneline .Fa "const X509_NAME *a" .Fa "char *buf" .Fa "int size" .Fc .Ft int .Fo X509_NAME_print .Fa "BIO *bp" .Fa "const X509_NAME *name" .Fa "int obase" .Fc .Sh DESCRIPTION .Fn X509_NAME_print_ex prints a human readable version of .Fa nm to .Vt BIO .Fa out . Each line (for multiline formats) is indented by .Fa indent spaces. The output format can be extensively customised by use of the .Fa flags parameter. .Pp .Fn X509_NAME_print_ex_fp is identical to .Fn X509_NAME_print_ex except the output is written to the .Vt FILE pointer .Fa fp . .Pp .Fn X509_NAME_oneline prints an ASCII version of .Fa a to .Fa buf . If .Fa buf is .Dv NULL , then a buffer is dynamically allocated and returned, and .Fa size is ignored. Otherwise, at most .Fa size bytes will be written, including the ending NUL, and .Fa buf is returned. .Pp .Fn X509_NAME_print prints out .Fa name to .Fa bp indenting each line by .Fa obase characters. Multiple lines are used if the output (including indent) exceeds 80 characters. .Pp The functions .Fn X509_NAME_oneline and .Fn X509_NAME_print are legacy functions which produce a non-standard output form. They don't handle multi-character fields and have various quirks and inconsistencies. Their use is strongly discouraged in new applications. .Pp Although there are a large number of possible flags, for most purposes .Dv XN_FLAG_ONELINE , .Dv XN_FLAG_MULTILINE , or .Dv XN_FLAG_RFC2253 will suffice. As noted on the .Xr ASN1_STRING_print_ex 3 manual page, for UTF-8 terminals the .Dv ASN1_STRFLGS_ESC_MSB should be unset: so for example .Dv XN_FLAG_ONELINE No & Pf ~ Dv ASN1_STRFLGS_ESC_MSB would be used. .Pp The complete set of the flags supported by .Dv X509_NAME_print_ex is listed below. .Pp Several options can be OR'ed together. .Pp The options .Dv XN_FLAG_SEP_COMMA_PLUS , .Dv XN_FLAG_SEP_CPLUS_SPC , .Dv XN_FLAG_SEP_SPLUS_SPC , and .Dv XN_FLAG_SEP_MULTILINE determine the field separators to use. Two distinct separators are used between distinct .Vt RelativeDistinguishedName components and separate values in the same RDN for a multi-valued RDN. Multi-valued RDNs are currently very rare so the second separator will hardly ever be used. .Pp .Dv XN_FLAG_SEP_COMMA_PLUS uses comma and plus as separators. .Dv XN_FLAG_SEP_CPLUS_SPC uses comma and plus with spaces: this is more readable that plain comma and plus. .Dv XN_FLAG_SEP_SPLUS_SPC uses spaced semicolon and plus. .Dv XN_FLAG_SEP_MULTILINE uses spaced newline and plus respectively. .Dv XN_FLAG_SEP_MASK contains the bits used to represent these four options. .Pp If .Dv XN_FLAG_DN_REV is set, the whole DN is printed in reversed order. .Pp The fields .Dv XN_FLAG_FN_SN , .Dv XN_FLAG_FN_LN , .Dv XN_FLAG_FN_OID , and .Dv XN_FLAG_FN_NONE determine how a field name is displayed. It will use the short name (e.g. CN), the long name (e.g. commonName), always use OID numerical form (normally OIDs are only used if the field name is not recognised) and no field name, respectively. .Dv XN_FLAG_FN_MASK contains the bits used to represent these four options. .Pp If .Dv XN_FLAG_SPC_EQ is set, then spaces will be placed around the .Ql = character separating field names and values. .Pp If .Dv XN_FLAG_DUMP_UNKNOWN_FIELDS is set, then the encoding of unknown fields is printed instead of the values. .Pp If .Dv XN_FLAG_FN_ALIGN is set, then field names are padded to 20 characters: this is only of use for multiline format. .Pp Additionally, all the options supported by .Xr ASN1_STRING_print_ex 3 can be used to control how each field value is displayed. .Pp In addition a number of options can be set for commonly used formats. .Pp .Dv XN_FLAG_RFC2253 sets options which produce an output compatible with RFC 2253. It is equivalent to .Dv ASN1_STRFLGS_RFC2253 | XN_FLAG_SEP_COMMA_PLUS | XN_FLAG_DN_REV | .Dv XN_FLAG_FN_SN | XN_FLAG_DUMP_UNKNOWN_FIELDS . .Pp .Dv XN_FLAG_ONELINE is a more readable one line format which is the same as: .Dv ASN1_STRFLGS_RFC2253 | ASN1_STRFLGS_ESC_QUOTE | XN_FLAG_SEP_CPLUS_SPC | .Dv XN_FLAG_SPC_EQ | XN_FLAG_FN_SN . .Pp .Dv XN_FLAG_MULTILINE is a multiline format which is the same as: .Dv ASN1_STRFLGS_ESC_CTRL | ASN1_STRFLGS_ESC_MSB | XN_FLAG_SEP_MULTILINE | .Dv XN_FLAG_SPC_EQ | XN_FLAG_FN_LN | XN_FLAG_FN_ALIGN . .Pp .Dv XN_FLAG_COMPAT uses a format identical to .Fn X509_NAME_print : in fact it calls .Fn X509_NAME_print internally. .Sh RETURN VALUES .Fn X509_NAME_print_ex and .Fn X509_NAME_print_ex_fp return 1 on success or 0 on error if .Dv XN_FLAG_COMPAT is set in .Fa flags . Otherwise, they return the number of printed bytes including the indentation or \-1 on error. .Pp .Fn X509_NAME_oneline returns a valid string on success or .Dv NULL on error. .Pp .Fn X509_NAME_print returns 1 on success or 0 on error. .Sh SEE ALSO .Xr ASN1_STRING_print_ex 3 , .Xr d2i_X509_NAME 3 , .Xr X509_NAME_get_index_by_NID 3 , .Xr X509_NAME_new 3 .Sh HISTORY .Fn X509_NAME_oneline and .Fn X509_NAME_print first appeared in SSLeay 0.5.1 and have been available since .Ox 2.4 . .Pp .Fn X509_NAME_print_ex and .Fn X509_NAME_print_ex_fp first appeared in OpenSSL 0.9.6 and have been available since .Ox 2.9 .