2 ''' $RCSfile$$Revision$$Date$
20 .ie \\n(.$>=3 .ne \\$3
36 ''' Set up \*(-- to give an unbreakable dash;
37 ''' string Tr holds user defined translation string.
38 ''' Bell System Logo is used as a dummy character.
44 .if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
45 .if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
48 ''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of
49 ''' \*(L" and \*(R", except that they are used on ".xx" lines,
50 ''' such as .IP and .SH, which do another additional levels of
51 ''' double-quote interpretation
80 .\" If the F register is turned on, we'll generate
81 .\" index entries out stderr for the following things:
86 .\" X<> Xref (embedded
87 .\" Of course, you have to process the output yourself
88 .\" in some meaninful fashion.
91 .tm Index:\\$1\t\\n%\t"\\$2"
96 .TH ASN1PARSE 1 "0.9.7d" "2/Sep/2004" "OpenSSL"
100 .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
101 .de CQ \" put $1 in typewriter font
107 \\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7
110 .\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2
111 . \" AM - accent mark definitions
113 . \" fudge factors for nroff and troff
122 . ds #H ((1u-(\\\\n(.fu%2u))*.13m)
128 . \" simple accents for nroff and troff
141 . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
142 . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
143 . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
144 . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
145 . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
146 . ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
147 . ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
148 . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
149 . ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
151 . \" troff and (daisy-wheel) nroff accents
152 .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
153 .ds 8 \h'\*(#H'\(*b\h'-\*(#H'
154 .ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
155 .ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
156 .ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
157 .ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
158 .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
159 .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
160 .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
161 .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
162 .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
163 .ds ae a\h'-(\w'a'u*4/10)'e
164 .ds Ae A\h'-(\w'A'u*4/10)'E
165 .ds oe o\h'-(\w'o'u*4/10)'e
166 .ds Oe O\h'-(\w'O'u*4/10)'E
167 . \" corrections for vroff
168 .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
169 .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
170 . \" for low resolution devices (crt and lpr)
171 .if \n(.H>23 .if \n(.V>19 \
175 . ds v \h'-1'\o'\(aa\(ga'
191 asn1parse \- ASN.1 parsing tool
193 \fBopenssl\fR \fBasn1parse\fR
194 [\fB\-inform PEM|DER\fR]
195 [\fB\-in filename\fR]
196 [\fB\-out filename\fR]
198 [\fB\-offset number\fR]
199 [\fB\-length number\fR]
201 [\fB\-oid filename\fR]
202 [\fB\-strparse offset\fR]
204 The \fBasn1parse\fR command is a diagnostic utility that can parse ASN.1
205 structures. It can also be used to extract data from ASN.1 formatted data.
207 .Ip "\fB\-inform\fR \fB\s-1DER\s0|\s-1PEM\s0\fR" 4
208 the input format. \fB\s-1DER\s0\fR is binary format and \fB\s-1PEM\s0\fR (the default) is base64
210 .Ip "\fB\-in filename\fR" 4
211 the input file, default is standard input
212 .Ip "\fB\-out filename\fR" 4
213 output file to place the \s-1DER\s0 encoded data into. If this
214 option is not present then no data will be output. This is most useful when
215 combined with the \fB\-strparse\fR option.
216 .Ip "\fB\-noout\fR" 4
217 don't output the parsed version of the input file.
218 .Ip "\fB\-offset number\fR" 4
219 starting offset to begin parsing, default is start of file.
220 .Ip "\fB\-length number\fR" 4
221 number of bytes to parse, default is until end of file.
223 indents the output according to the \*(L"depth\*(R" of the structures.
224 .Ip "\fB\-oid filename\fR" 4
225 a file containing additional \s-1OBJECT\s0 IDENTIFIERs (OIDs). The format of this
226 file is described in the \s-1NOTES\s0 section below.
227 .Ip "\fB\-strparse offset\fR" 4
228 parse the contents octets of the \s-1ASN\s0.1 object starting at \fBoffset\fR. This
229 option can be used multiple times to \*(L"drill down\*(R" into a nested structure.
231 The output will typically contain lines like this:
234 \& 0:d=0 hl=4 l= 681 cons: SEQUENCE
239 \& 229:d=3 hl=3 l= 141 prim: BIT STRING
240 \& 373:d=2 hl=3 l= 162 cons: cont [ 3 ]
241 \& 376:d=3 hl=3 l= 159 cons: SEQUENCE
242 \& 379:d=4 hl=2 l= 29 cons: SEQUENCE
243 \& 381:d=5 hl=2 l= 3 prim: OBJECT :X509v3 Subject Key Identifier
244 \& 386:d=5 hl=2 l= 22 prim: OCTET STRING
245 \& 410:d=4 hl=2 l= 112 cons: SEQUENCE
246 \& 412:d=5 hl=2 l= 3 prim: OBJECT :X509v3 Authority Key Identifier
247 \& 417:d=5 hl=2 l= 105 prim: OCTET STRING
248 \& 524:d=4 hl=2 l= 12 cons: SEQUENCE
252 This example is part of a self signed certificate. Each line starts with the
253 offset in decimal. \fBd=\s-1XX\s0\fR specifies the current depth. The depth is increased
254 within the scope of any \s-1SET\s0 or \s-1SEQUENCE\s0. \fBhl=\s-1XX\s0\fR gives the header length
255 (tag and length octets) of the current type. \fBl=\s-1XX\s0\fR gives the length of
258 The \fB\-i\fR option can be used to make the output more readable.
260 Some knowledge of the \s-1ASN\s0.1 structure is needed to interpret the output.
262 In this example the \s-1BIT\s0 \s-1STRING\s0 at offset 229 is the certificate public key.
263 The contents octets of this will contain the public key information. This can
264 be examined using the option \fB\-strparse 229\fR to yield:
267 \& 0:d=0 hl=3 l= 137 cons: SEQUENCE
268 \& 3:d=1 hl=3 l= 129 prim: INTEGER :E5D21E1F5C8D208EA7A2166C7FAF9F6BDF2059669C60876DDB70840F1A5AAFA59699FE471F379F1DD6A487E7D5409AB6A88D4A9746E24B91D8CF55DB3521015460C8EDE44EE8A4189F7A7BE77D6CD3A9AF2696F486855CF58BF0EDF2B4068058C7A947F52548DDF7E15E96B385F86422BEA9064A3EE9E1158A56E4A6F47E5897
269 \& 135:d=1 hl=2 l= 3 prim: INTEGER :010001
272 If an OID is not part of OpenSSL's internal table it will be represented in
273 numerical form (for example 1.2.3.4). The file passed to the \fB\-oid\fR option
274 allows additional OIDs to be included. Each line consists of three columns,
275 the first column is the OID in numerical format and should be followed by white
276 space. The second column is the \*(L"short name\*(R" which is a single word followed
277 by white space. The final column is the rest of the line and is the
278 \*(L"long name\*(R". \fBasn1parse\fR displays the long name. Example:
280 \f(CW1.2.3.4 shortName A long name\fR
282 There should be options to change the format of input lines. The output of some
283 ASN.1 types is not well handled (if at all).
286 .IX Title "ASN1PARSE 1"
287 .IX Name "asn1parse - ASN.1 parsing tool"
291 .IX Header "SYNOPSIS"
293 .IX Header "DESCRIPTION"
297 .IX Item "\fB\-inform\fR \fB\s-1DER\s0|\s-1PEM\s0\fR"
299 .IX Item "\fB\-in filename\fR"
301 .IX Item "\fB\-out filename\fR"
303 .IX Item "\fB\-noout\fR"
305 .IX Item "\fB\-offset number\fR"
307 .IX Item "\fB\-length number\fR"
311 .IX Item "\fB\-oid filename\fR"
313 .IX Item "\fB\-strparse offset\fR"
315 .IX Subsection "\s-1OUTPUT\s0"