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diff --git a/usr/man/man1/asn1parse.1 b/usr/man/man1/asn1parse.1 new file mode 100755 index 000000000..16e06831e --- /dev/null +++ b/usr/man/man1/asn1parse.1 @@ -0,0 +1,303 @@ +.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +asn1parse \- ASN.1 parsing tool +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +\&\fBopenssl\fR \fBasn1parse\fR +[\fB\-inform PEM|DER\fR] +[\fB\-in filename\fR] +[\fB\-out filename\fR] +[\fB\-noout\fR] +[\fB\-offset number\fR] +[\fB\-length number\fR] +[\fB\-i\fR] +[\fB\-oid filename\fR] +[\fB\-strparse offset\fR] +[\fB\-genstr string\fR] +[\fB\-genconf file\fR] +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The \fBasn1parse\fR command is a diagnostic utility that can parse \s-1ASN.1\s0 +structures. It can also be used to extract data from \s-1ASN.1\s0 formatted data. +.SH "OPTIONS" +.IX Header "OPTIONS" +.IP "\fB\-inform\fR \fBDER|PEM\fR" 4 +.IX Item "-inform DER|PEM" +the input format. \fB\s-1DER\s0\fR is binary format and \fB\s-1PEM\s0\fR (the default) is base64 +encoded. +.IP "\fB\-in filename\fR" 4 +.IX Item "-in filename" +the input file, default is standard input +.IP "\fB\-out filename\fR" 4 +.IX Item "-out filename" +output file to place the \s-1DER\s0 encoded data into. If this +option is not present then no data will be output. This is most useful when +combined with the \fB\-strparse\fR option. +.IP "\fB\-noout\fR" 4 +.IX Item "-noout" +don't output the parsed version of the input file. +.IP "\fB\-offset number\fR" 4 +.IX Item "-offset number" +starting offset to begin parsing, default is start of file. +.IP "\fB\-length number\fR" 4 +.IX Item "-length number" +number of bytes to parse, default is until end of file. +.IP "\fB\-i\fR" 4 +.IX Item "-i" +indents the output according to the \*(L"depth\*(R" of the structures. +.IP "\fB\-oid filename\fR" 4 +.IX Item "-oid filename" +a file containing additional \s-1OBJECT\s0 IDENTIFIERs (OIDs). The format of this +file is described in the \s-1NOTES\s0 section below. +.IP "\fB\-strparse offset\fR" 4 +.IX Item "-strparse offset" +parse the contents octets of the \s-1ASN.1\s0 object starting at \fBoffset\fR. This +option can be used multiple times to \*(L"drill down\*(R" into a nested structure. +.IP "\fB\-genstr string\fR, \fB\-genconf file\fR" 4 +.IX Item "-genstr string, -genconf file" +generate encoded data based on \fBstring\fR, \fBfile\fR or both using +\&\fIASN1_generate_nconf()\fR format. If \fBfile\fR only is present then the string +is obtained from the default section using the name \fBasn1\fR. The encoded +data is passed through the \s-1ASN1\s0 parser and printed out as though it came +from a file, the contents can thus be examined and written to a file +using the \fBout\fR option. +.SS "\s-1OUTPUT\s0" +.IX Subsection "OUTPUT" +The output will typically contain lines like this: +.PP +.Vb 1 +\& 0:d=0 hl=4 l= 681 cons: SEQUENCE +.Ve +.PP +\&..... +.PP +.Vb 10 +\& 229:d=3 hl=3 l= 141 prim: BIT STRING +\& 373:d=2 hl=3 l= 162 cons: cont [ 3 ] +\& 376:d=3 hl=3 l= 159 cons: SEQUENCE +\& 379:d=4 hl=2 l= 29 cons: SEQUENCE +\& 381:d=5 hl=2 l= 3 prim: OBJECT :X509v3 Subject Key Identifier +\& 386:d=5 hl=2 l= 22 prim: OCTET STRING +\& 410:d=4 hl=2 l= 112 cons: SEQUENCE +\& 412:d=5 hl=2 l= 3 prim: OBJECT :X509v3 Authority Key Identifier +\& 417:d=5 hl=2 l= 105 prim: OCTET STRING +\& 524:d=4 hl=2 l= 12 cons: SEQUENCE +.Ve +.PP +\&..... +.PP +This example is part of a self signed certificate. Each line starts with the +offset in decimal. \fBd=XX\fR specifies the current depth. The depth is increased +within the scope of any \s-1SET\s0 or \s-1SEQUENCE. \s0\fBhl=XX\fR gives the header length +(tag and length octets) of the current type. \fBl=XX\fR gives the length of +the contents octets. +.PP +The \fB\-i\fR option can be used to make the output more readable. +.PP +Some knowledge of the \s-1ASN.1\s0 structure is needed to interpret the output. +.PP +In this example the \s-1BIT STRING\s0 at offset 229 is the certificate public key. +The contents octets of this will contain the public key information. This can +be examined using the option \fB\-strparse 229\fR to yield: +.PP +.Vb 3 +\& 0:d=0 hl=3 l= 137 cons: SEQUENCE +\& 3:d=1 hl=3 l= 129 prim: INTEGER :E5D21E1F5C8D208EA7A2166C7FAF9F6BDF2059669C60876DDB70840F1A5AAFA59699FE471F379F1DD6A487E7D5409AB6A88D4A9746E24B91D8CF55DB3521015460C8EDE44EE8A4189F7A7BE77D6CD3A9AF2696F486855CF58BF0EDF2B4068058C7A947F52548DDF7E15E96B385F86422BEA9064A3EE9E1158A56E4A6F47E5897 +\& 135:d=1 hl=2 l= 3 prim: INTEGER :010001 +.Ve +.SH "NOTES" +.IX Header "NOTES" +If an \s-1OID\s0 is not part of OpenSSL's internal table it will be represented in +numerical form (for example 1.2.3.4). The file passed to the \fB\-oid\fR option +allows additional OIDs to be included. Each line consists of three columns, +the first column is the \s-1OID\s0 in numerical format and should be followed by white +space. The second column is the \*(L"short name\*(R" which is a single word followed +by white space. The final column is the rest of the line and is the +\&\*(L"long name\*(R". \fBasn1parse\fR displays the long name. Example: +.PP +\&\f(CW\*(C`1.2.3.4 shortName A long name\*(C'\fR +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Parse a file: +.PP +.Vb 1 +\& openssl asn1parse \-in file.pem +.Ve +.PP +Parse a \s-1DER\s0 file: +.PP +.Vb 1 +\& openssl asn1parse \-inform DER \-in file.der +.Ve +.PP +Generate a simple UTF8String: +.PP +.Vb 1 +\& openssl asn1parse \-genstr \*(AqUTF8:Hello World\*(Aq +.Ve +.PP +Generate and write out a UTF8String, don't print parsed output: +.PP +.Vb 1 +\& openssl asn1parse \-genstr \*(AqUTF8:Hello World\*(Aq \-noout \-out utf8.der +.Ve +.PP +Generate using a config file: +.PP +.Vb 1 +\& openssl asn1parse \-genconf asn1.cnf \-noout \-out asn1.der +.Ve +.PP +Example config file: +.PP +.Vb 1 +\& asn1=SEQUENCE:seq_sect +\& +\& [seq_sect] +\& +\& field1=BOOL:TRUE +\& field2=EXP:0, UTF8:some random string +.Ve +.SH "BUGS" +.IX Header "BUGS" +There should be options to change the format of output lines. The output of some +\&\s-1ASN.1\s0 types is not well handled (if at all). |