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4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use Convert::BER::XS ':all'; |
7 | use Convert::BER::XS ':all'; |
8 | |
8 | |
9 | my $ber = ber_decode $buf |
9 | my $ber = ber_decode $buf, $Convert::BER::XS::SNMP_PROFILE |
10 | or die "unable to decode SNMP message"; |
10 | or die "unable to decode SNMP message"; |
11 | |
11 | |
12 | # The above results in a data structure consisting of |
12 | # The above results in a data structure consisting of |
13 | # (class, tag, # constructed, data) |
13 | # (class, tag, # constructed, data) |
14 | # tuples. Below is such a message, SNMPv1 trap |
14 | # tuples. Below is such a message, SNMPv1 trap |
15 | # with a Cisco mac change notification. |
15 | # with a Cisco mac change notification. |
16 | # Did you know that Cisco is in the news almost |
16 | # Did you know that Cisco is in the news almost |
17 | # every week because # of some backdoor password |
17 | # every week because of some backdoor password |
18 | # or other extremely stupid security bug? |
18 | # or other extremely stupid security bug? |
19 | |
19 | |
20 | [ ASN_UNIVERSAL, ASN_SEQUENCE, 1, |
20 | [ ASN_UNIVERSAL, ASN_SEQUENCE, 1, |
21 | [ |
21 | [ |
22 | [ ASN_UNIVERSAL, ASN_INTEGER32, 0, 0 ], # snmp version 1 |
22 | [ ASN_UNIVERSAL, ASN_INTEGER32, 0, 0 ], # snmp version 1 |
23 | [ ASN_UNIVERSAL, 4, 0, "public" ], # community |
23 | [ ASN_UNIVERSAL, 4, 0, "public" ], # community |
24 | [ ASN_CONTEXT, 4, 1, # CHOICE, constructed - trap PDU |
24 | [ ASN_CONTEXT, 4, 1, # CHOICE, constructed - trap PDU |
25 | [ |
25 | [ |
26 | [ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.2" ], # enterprise oid |
26 | [ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.2" ], # enterprise oid |
27 | [ ASN_APPLICATION, 0, 0, "\x0a\x00\x00\x01" ], # SNMP IpAddress, 10.0.0.1 |
27 | [ ASN_APPLICATION, SNMP_IPADDRESS, 0, "10.0.0.1" ], # SNMP IpAddress |
28 | [ ASN_UNIVERSAL, ASN_INTEGER32, 0, 6 ], # generic trap |
28 | [ ASN_UNIVERSAL, ASN_INTEGER32, 0, 6 ], # generic trap |
29 | [ ASN_UNIVERSAL, ASN_INTEGER32, 0, 1 ], # specific trap |
29 | [ ASN_UNIVERSAL, ASN_INTEGER32, 0, 1 ], # specific trap |
30 | [ ASN_APPLICATION, ASN_TIMETICKS, 0, 1817903850 ], # SNMP TimeTicks |
30 | [ ASN_APPLICATION, SNMP_TIMETICKS, 0, 1817903850 ], # SNMP TimeTicks |
31 | [ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # the varbindlist |
31 | [ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # the varbindlist |
32 | [ |
32 | [ |
33 | [ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # a single varbind, "key value" pair |
33 | [ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # a single varbind, "key value" pair |
34 | [ |
34 | [ |
35 | [ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.1.1.8.1.2.1" ], |
35 | [ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.1.1.8.1.2.1" ], |
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62 | ) { |
62 | ) { |
63 | ... and so on |
63 | ... and so on |
64 | |
64 | |
65 | # finally, let's encode it again and hope it results in the same bit pattern |
65 | # finally, let's encode it again and hope it results in the same bit pattern |
66 | |
66 | |
67 | my $buf = ber_encode $ber; |
67 | my $buf = ber_encode $ber, $Convert::BER::XS::SNMP_PROFILE; |
68 | |
68 | |
69 | =head1 DESCRIPTION |
69 | =head1 DESCRIPTION |
70 | |
70 | |
71 | WARNING: Before release 1.0, the API is not considered stable in any way. |
71 | WARNING: Before release 1.0, the API is not considered stable in any way. |
72 | |
72 | |
73 | This module implements a I<very> low level BER/DER en-/decoder. |
73 | This module implements a I<very> low level BER/DER en-/decoder. |
74 | |
74 | |
75 | If is tuned for low memory and high speed, while still maintaining some |
75 | It is tuned for low memory and high speed, while still maintaining some |
76 | level of user-friendlyness. |
76 | level of user-friendlyness. |
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77 | |
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78 | =head2 EXPORT TAGS AND CONSTANTS |
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79 | |
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80 | By default this module doesn't export any symbols, but if you don't want |
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81 | to break your keyboard, editor or eyesight with extremely long names, I |
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82 | recommend importing the C<:all> tag. Still, you can selectively import |
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83 | things. |
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84 | |
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85 | =over |
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86 | |
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87 | =item C<:all> |
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88 | |
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89 | All of the below. Really. Recommended for at least first steps, or if you |
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90 | don't care about a few kilobytes of wasted memory (and namespace). |
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91 | |
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92 | =item C<:const> |
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93 | |
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94 | All of the strictly ASN.1-related constants defined by this module, the |
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95 | same as C<:const_asn :const_index>. Notably, this does not contain |
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96 | C<:const_ber_type> and C<:const_snmp>. |
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97 | |
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98 | A good set to get everything you need to decode and match BER data would be |
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99 | C<:decode :const>. |
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100 | |
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101 | =item C<:const_index> |
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102 | |
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103 | The BER tuple array index constants: |
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104 | |
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105 | BER_CLASS BER_TAG BER_CONSTRUCTED BER_DATA |
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106 | |
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107 | =item C<:const_asn> |
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108 | |
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109 | ASN class values (these are C<0>, C<1>, C<2> and C<3>, respectively - |
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110 | exactly thw two topmost bits from the identifier octet shifted 6 bits to |
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111 | the right): |
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112 | |
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113 | ASN_UNIVERSAL ASN_APPLICATION ASN_CONTEXT ASN_PRIVATE |
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114 | |
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115 | ASN tag values (some of which are aliases, such as C<ASN_OID>). Their |
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116 | numerical value corresponds exactly to the numbers used in BER/X.690. |
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117 | |
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118 | ASN_BOOLEAN ASN_INTEGER32 ASN_BIT_STRING ASN_OCTET_STRING ASN_NULL ASN_OBJECT_IDENTIFIER |
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119 | ASN_OBJECT_DESCRIPTOR ASN_OID ASN_EXTERNAL ASN_REAL ASN_SEQUENCE ASN_ENUMERATED |
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120 | ASN_EMBEDDED_PDV ASN_UTF8_STRING ASN_RELATIVE_OID ASN_SET ASN_NUMERIC_STRING |
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121 | ASN_PRINTABLE_STRING ASN_TELETEX_STRING ASN_T61_STRING ASN_VIDEOTEX_STRING ASN_IA5_STRING |
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122 | ASN_ASCII_STRING ASN_UTC_TIME ASN_GENERALIZED_TIME ASN_GRAPHIC_STRING ASN_VISIBLE_STRING |
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123 | ASN_ISO646_STRING ASN_GENERAL_STRING ASN_UNIVERSAL_STRING ASN_CHARACTER_STRING ASN_BMP_STRING |
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124 | |
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125 | =item C<:const_ber_type> |
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126 | |
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127 | The BER type constants, explained in the PROFILES section. |
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128 | |
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129 | BER_TYPE_BYTES BER_TYPE_UTF8 BER_TYPE_UCS2 BER_TYPE_UCS4 BER_TYPE_INT |
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130 | BER_TYPE_OID BER_TYPE_RELOID BER_TYPE_NULL BER_TYPE_BOOL BER_TYPE_REAL |
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131 | BER_TYPE_IPADDRESS BER_TYPE_CROAK |
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132 | |
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133 | =item C<:const_snmp> |
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134 | |
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135 | Constants only relevant to SNMP. These are the tag values used by SNMP in |
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136 | the C<ASN_APPLICATION> namespace and have the exact numerical value as in |
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137 | BER/RFC 2578. |
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138 | |
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139 | SNMP_IPADDRESS SNMP_COUNTER32 SNMP_UNSIGNED32 SNMP_TIMETICKS SNMP_OPAQUE SNMP_COUNTER64 |
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140 | |
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141 | =item C<:decode> |
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142 | |
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143 | C<ber_decode> and the match helper functions: |
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144 | |
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145 | ber_decode ber_is ber_is_seq ber_is_i32 ber_is_oid |
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146 | |
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147 | =item C<:encode> |
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148 | |
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149 | C<ber_encode> and the construction helper functions: |
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150 | |
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151 | ber_encode ber_i32 |
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152 | |
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153 | =back |
77 | |
154 | |
78 | =head2 ASN.1/BER/DER/... BASICS |
155 | =head2 ASN.1/BER/DER/... BASICS |
79 | |
156 | |
80 | ASN.1 is a strange language that can be used to describe protocols and |
157 | ASN.1 is a strange language that can be used to describe protocols and |
81 | data structures. It supports various mappings to JSON, XML, but most |
158 | data structures. It supports various mappings to JSON, XML, but most |
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92 | and also have a flag that says whether a value consists of subvalues (is |
169 | and also have a flag that says whether a value consists of subvalues (is |
93 | "constructed") or not (is "primitive"). |
170 | "constructed") or not (is "primitive"). |
94 | |
171 | |
95 | Tags are simple integers, and ASN.1 defines a somewhat weird assortment of |
172 | Tags are simple integers, and ASN.1 defines a somewhat weird assortment of |
96 | those - for example, you have 32 bit signed integers and 16(!) different |
173 | those - for example, you have 32 bit signed integers and 16(!) different |
97 | string types, but there is no unsigned32 type for example. Different |
174 | string types, but there is no Unsigned32 type for example. Different |
98 | applications work around this in different ways, for example, SNMP defines |
175 | applications work around this in different ways, for example, SNMP defines |
99 | application-specific Gauge32, Counter32 and Unsigned32, which are mapped |
176 | application-specific Gauge32, Counter32 and Unsigned32, which are mapped |
100 | to two different tags: you can distinguish between Counter32 and the |
177 | to two different tags: you can distinguish between Counter32 and the |
101 | others, but not between Gause32 and Unsigned32, without the ASN.1 schema. |
178 | others, but not between Gause32 and Unsigned32, without the ASN.1 schema. |
102 | |
179 | |
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106 | |
183 | |
107 | This module represents every BER value as a 4-element tuple (actually an |
184 | This module represents every BER value as a 4-element tuple (actually an |
108 | array-reference): |
185 | array-reference): |
109 | |
186 | |
110 | [CLASS, TAG, CONSTRUCTED, DATA] |
187 | [CLASS, TAG, CONSTRUCTED, DATA] |
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188 | |
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189 | For example: |
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190 | |
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191 | [ASN_UNIVERSAL, ASN_INTEGER32, 0, 177] # the integer 177 |
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192 | [ASN_UNIVERSAL, ASN_OCTET_STRING, 0, "john"] # the string "john" |
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193 | [ASN_UNIVERSAL, ASN_OID, 0, "1.3.6.133"] # some OID |
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194 | [ASN_UNIVERSAL, ASN_SEQUENCE, 1, [ [ASN_UNIVERSAL... # a sequence |
111 | |
195 | |
112 | To avoid non-descriptive hardcoded array index numbers, this module |
196 | To avoid non-descriptive hardcoded array index numbers, this module |
113 | defines symbolic constants to access these members: C<BER_CLASS>, |
197 | defines symbolic constants to access these members: C<BER_CLASS>, |
114 | C<BER_TAG>, C<BER_CONSTRUCTED> and C<BER_DATA>. |
198 | C<BER_TAG>, C<BER_CONSTRUCTED> and C<BER_DATA>. |
115 | |
199 | |
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134 | specific applications (for example, the SNMP C<Unsigned32> type is in this |
218 | specific applications (for example, the SNMP C<Unsigned32> type is in this |
135 | namespace), a special-purpose context namespace (C<ASN_CONTEXT>, used e.g. |
219 | namespace), a special-purpose context namespace (C<ASN_CONTEXT>, used e.g. |
136 | for C<CHOICE>) and a private namespace (C<ASN_PRIVATE>). |
220 | for C<CHOICE>) and a private namespace (C<ASN_PRIVATE>). |
137 | |
221 | |
138 | The meaning of the I<TAG> depends on the namespace, and defines a |
222 | The meaning of the I<TAG> depends on the namespace, and defines a |
139 | (partial) interpretation of the data value. For example, right now, SNMP |
223 | (partial) interpretation of the data value. For example, SNMP defines |
140 | application namespace knowledge ix hardcoded into this module, so it |
224 | extra tags in the C<ASN_APPLICATION> namespace, and to take full advantage |
141 | knows that SNMP C<Unsigned32> values need to be decoded into actual perl |
225 | of these, you need to tell this module how to handle those via profiles. |
142 | integers. |
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143 | |
226 | |
144 | The most common tags in the C<ASN_UNIVERSAL> namespace are |
227 | The most common tags in the C<ASN_UNIVERSAL> namespace are |
145 | C<ASN_INTEGER32>, C<ASN_BIT_STRING>, C<ASN_NULL>, C<ASN_OCTET_STRING>, |
228 | C<ASN_INTEGER32>, C<ASN_BIT_STRING>, C<ASN_NULL>, C<ASN_OCTET_STRING>, |
146 | C<ASN_OBJECT_IDENTIFIER>, C<ASN_SEQUENCE>, C<ASN_SET> and |
229 | C<ASN_OBJECT_IDENTIFIER>, C<ASN_SEQUENCE>, C<ASN_SET> and |
147 | C<ASN_IA5_STRING>. |
230 | C<ASN_IA5_STRING>. |
148 | |
231 | |
149 | The most common tags in SNMP's C<ASN_APPLICATION> namespace |
232 | The most common tags in SNMP's C<ASN_APPLICATION> namespace are |
150 | are C<SNMP_IPADDRESS>, C<SNMP_COUNTER32>, C<SNMP_UNSIGNED32>, |
233 | C<SNMP_COUNTER32>, C<SNMP_UNSIGNED32>, C<SNMP_TIMETICKS> and |
151 | C<SNMP_TIMETICKS>, C<SNMP_OPAQUE> and C<SNMP_COUNTER64>. |
234 | C<SNMP_COUNTER64>. |
152 | |
235 | |
153 | The I<CONSTRUCTED> flag is really just a boolean - if it is false, the |
236 | The I<CONSTRUCTED> flag is really just a boolean - if it is false, |
154 | the value is "primitive" and contains no subvalues, kind of like a |
237 | the value is "primitive" and contains no subvalues, kind of like a |
155 | non-reference perl scalar. IF it is true, then the value is "constructed" |
238 | non-reference perl scalar. If it is true, then the value is "constructed" |
156 | which just means it contains a list of subvalues which this module will |
239 | which just means it contains a list of subvalues which this module will |
157 | en-/decode as BER tuples themselves. |
240 | en-/decode as BER tuples themselves. |
158 | |
241 | |
159 | The I<DATA> value is either a reference to an array of further tuples (if |
242 | The I<DATA> value is either a reference to an array of further tuples (if |
160 | the value is I<CONSTRUCTED>), some decoded representation of the value, |
243 | the value is I<CONSTRUCTED>), some decoded representation of the value, |
… | |
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169 | |
252 | |
170 | =head2 DECODING AND ENCODING |
253 | =head2 DECODING AND ENCODING |
171 | |
254 | |
172 | =over |
255 | =over |
173 | |
256 | |
174 | =item $tuple = ber_decoded $bindata |
257 | =item $tuple = ber_decoded $bindata[, $profile] |
175 | |
258 | |
176 | Decodes binary BER data in C<$bindata> and returns the resulting BER |
259 | Decodes binary BER data in C<$bindata> and returns the resulting BER |
177 | tuple. Croaks on any decoding error, so the returned C<$tuple> is always |
260 | tuple. Croaks on any decoding error, so the returned C<$tuple> is always |
178 | valid. |
261 | valid. |
179 | |
262 | |
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263 | How tags are interpreted is defined by the second argument, which must |
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264 | be a C<Convert::BER::XS::Profile> object. If it is missing, the default |
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265 | profile will be used (C<$Convert::BER::XS::DEFAULT_PROFILE>). |
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266 | |
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267 | In addition to rolling your own, this module provides a |
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268 | C<$Convert::BER::XS::SNMP_PROFILE> that knows about the additional SNMP |
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269 | types. |
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270 | |
180 | =item $bindata = ber_encode $tuple |
271 | =item $bindata = ber_encode $tuple[, $profile] |
181 | |
272 | |
182 | Encodes the BER tuple into a BER/DER data structure. |
273 | Encodes the BER tuple into a BER/DER data structure. AS with |
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274 | Cyber_decode>, an optional profile can be given. |
183 | |
275 | |
184 | =back |
276 | =back |
185 | |
277 | |
186 | =head2 HELPER FUNCTIONS |
278 | =head2 HELPER FUNCTIONS |
187 | |
279 | |
188 | Working with a 4-tuple for every value can be annoying. Or, rather, I<is> |
280 | Working with a 4-tuple for every value can be annoying. Or, rather, I<is> |
189 | annoying. To reduce this a bit, this module defines a number of helper |
281 | annoying. To reduce this a bit, this module defines a number of helper |
190 | functions, both to match BER tuples and to conmstruct BER tuples: |
282 | functions, both to match BER tuples and to construct BER tuples: |
191 | |
283 | |
192 | =head3 MATCH HELPERS |
284 | =head3 MATCH HELPERS |
193 | |
285 | |
194 | Thse functions accept a BER tuple as first argument and either paertially |
286 | These functions accept a BER tuple as first argument and either partially |
195 | or fully match it. They often come in two forms, one which exactly matches |
287 | or fully match it. They often come in two forms, one which exactly matches |
196 | a value, and one which only matches the type and returns the value. |
288 | a value, and one which only matches the type and returns the value. |
197 | |
289 | |
198 | They do check whether valid tuples are passed in and croak otherwise. As |
290 | They do check whether valid tuples are passed in and croak otherwise. As |
199 | a ease-of-use exception, they usually also accept C<undef> instead of a |
291 | a ease-of-use exception, they usually also accept C<undef> instead of a |
200 | tuple reference. in which case they silently fail to match. |
292 | tuple reference, in which case they silently fail to match. |
201 | |
293 | |
202 | =over |
294 | =over |
203 | |
295 | |
204 | =item $bool = ber_is $tuple, $class, $tag, $constructed, $data |
296 | =item $bool = ber_is $tuple, $class, $tag, $constructed, $data |
205 | |
297 | |
206 | This takes a BER C<$tuple> and matches its elements agains the privded |
298 | This takes a BER C<$tuple> and matches its elements against the provided |
207 | values, all of which are optional - values that are either missing or |
299 | values, all of which are optional - values that are either missing or |
208 | C<undef> will be ignored, the others will be matched exactly (e.g. as if |
300 | C<undef> will be ignored, the others will be matched exactly (e.g. as if |
209 | you used C<==> or C<eq> (for C<$data>)). |
301 | you used C<==> or C<eq> (for C<$data>)). |
210 | |
302 | |
211 | Some examples: |
303 | Some examples: |
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294 | $VERSION = 0.8; |
386 | $VERSION = 0.8; |
295 | XSLoader::load __PACKAGE__, $VERSION; |
387 | XSLoader::load __PACKAGE__, $VERSION; |
296 | } |
388 | } |
297 | |
389 | |
298 | our %EXPORT_TAGS = ( |
390 | our %EXPORT_TAGS = ( |
299 | const => [qw( |
391 | const_index => [qw( |
300 | BER_CLASS BER_TAG BER_CONSTRUCTED BER_DATA |
392 | BER_CLASS BER_TAG BER_CONSTRUCTED BER_DATA |
301 | |
393 | )], |
|
|
394 | const_asn => [qw( |
302 | ASN_BOOLEAN ASN_INTEGER32 ASN_BIT_STRING ASN_OCTET_STRING ASN_NULL ASN_OBJECT_IDENTIFIER |
395 | ASN_BOOLEAN ASN_INTEGER32 ASN_BIT_STRING ASN_OCTET_STRING ASN_NULL ASN_OBJECT_IDENTIFIER |
303 | ASN_OBJECT_DESCRIPTOR ASN_OID ASN_EXTERNAL ASN_REAL ASN_SEQUENCE ASN_ENUMERATED |
396 | ASN_OBJECT_DESCRIPTOR ASN_OID ASN_EXTERNAL ASN_REAL ASN_SEQUENCE ASN_ENUMERATED |
304 | ASN_EMBEDDED_PDV ASN_UTF8_STRING ASN_RELATIVE_OID ASN_SET ASN_NUMERIC_STRING |
397 | ASN_EMBEDDED_PDV ASN_UTF8_STRING ASN_RELATIVE_OID ASN_SET ASN_NUMERIC_STRING |
305 | ASN_PRINTABLE_STRING ASN_TELETEX_STRING ASN_T61_STRING ASN_VIDEOTEX_STRING ASN_IA5_STRING |
398 | ASN_PRINTABLE_STRING ASN_TELETEX_STRING ASN_T61_STRING ASN_VIDEOTEX_STRING ASN_IA5_STRING |
306 | ASN_ASCII_STRING ASN_UTC_TIME ASN_GENERALIZED_TIME ASN_GRAPHIC_STRING ASN_VISIBLE_STRING |
399 | ASN_ASCII_STRING ASN_UTC_TIME ASN_GENERALIZED_TIME ASN_GRAPHIC_STRING ASN_VISIBLE_STRING |
307 | ASN_ISO646_STRING ASN_GENERAL_STRING ASN_UNIVERSAL_STRING ASN_CHARACTER_STRING ASN_BMP_STRING |
400 | ASN_ISO646_STRING ASN_GENERAL_STRING ASN_UNIVERSAL_STRING ASN_CHARACTER_STRING ASN_BMP_STRING |
308 | |
401 | |
309 | ASN_UNIVERSAL ASN_APPLICATION ASN_CONTEXT ASN_PRIVATE |
402 | ASN_UNIVERSAL ASN_APPLICATION ASN_CONTEXT ASN_PRIVATE |
310 | |
403 | )], |
|
|
404 | const_ber_type => [qw( |
311 | BER_TYPE_BYTES BER_TYPE_UTF8 BER_TYPE_UCS2 BER_TYPE_UCS4 BER_TYPE_INT |
405 | BER_TYPE_BYTES BER_TYPE_UTF8 BER_TYPE_UCS2 BER_TYPE_UCS4 BER_TYPE_INT |
312 | BER_TYPE_OID BER_TYPE_RELOID BER_TYPE_NULL BER_TYPE_BOOL BER_TYPE_REAL |
406 | BER_TYPE_OID BER_TYPE_RELOID BER_TYPE_NULL BER_TYPE_BOOL BER_TYPE_REAL |
313 | BER_TYPE_IPADDRESS BER_TYPE_CROAK |
407 | BER_TYPE_IPADDRESS BER_TYPE_CROAK |
314 | )], |
408 | )], |
315 | const_snmp => [qw( |
409 | const_snmp => [qw( |
316 | SNMP_IPADDRESS SNMP_COUNTER32 SNMP_UNSIGNED32 SNMP_TIMETICKS SNMP_OPAQUE SNMP_COUNTER64 |
410 | SNMP_IPADDRESS SNMP_COUNTER32 SNMP_UNSIGNED32 SNMP_TIMETICKS SNMP_OPAQUE SNMP_COUNTER64 |
317 | )], |
411 | )], |
318 | encode => [qw( |
412 | decode => [qw( |
319 | ber_decode |
413 | ber_decode |
320 | ber_is ber_is_seq ber_is_i32 ber_is_oid |
414 | ber_is ber_is_seq ber_is_i32 ber_is_oid |
321 | )], |
415 | )], |
322 | decode => [qw( |
416 | encode => [qw( |
323 | ber_encode |
417 | ber_encode |
324 | ber_i32 |
418 | ber_i32 |
325 | )], |
419 | )], |
326 | ); |
420 | ); |
327 | |
421 | |
328 | our @EXPORT_OK = map @$_, values %EXPORT_TAGS; |
422 | our @EXPORT_OK = map @$_, values %EXPORT_TAGS; |
329 | |
423 | |
330 | $EXPORT_TAGS{all} = \@EXPORT_OK; |
424 | $EXPORT_TAGS{all} = \@EXPORT_OK; |
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425 | $EXPORT_TAGS{const} = [map @{ $EXPORT_TAGS{$_} }, qw(const_index const_asn)]; |
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426 | use Data::Dump; ddx \%EXPORT_TAGS; |
331 | |
427 | |
332 | =head1 PROFILES |
428 | =head1 PROFILES |
333 | |
429 | |
334 | While any BER data can be correctly encoded and decoded out of the box, it |
430 | While any BER data can be correctly encoded and decoded out of the box, it |
335 | can be inconvenient to have to manually decode some values into a "better" |
431 | can be inconvenient to have to manually decode some values into a "better" |
… | |
… | |
480 | =cut |
576 | =cut |
481 | |
577 | |
482 | our $DEFAULT_PROFILE = new Convert::BER::XS::Profile; |
578 | our $DEFAULT_PROFILE = new Convert::BER::XS::Profile; |
483 | our $SNMP_PROFILE = new Convert::BER::XS::Profile; |
579 | our $SNMP_PROFILE = new Convert::BER::XS::Profile; |
484 | |
580 | |
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|
581 | # additional SNMP application types |
485 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_IPADDRESS , BER_TYPE_IPADDRESS); |
582 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_IPADDRESS , BER_TYPE_IPADDRESS); |
486 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_COUNTER32 , BER_TYPE_INT); |
583 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_COUNTER32 , BER_TYPE_INT); |
487 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_UNSIGNED32, BER_TYPE_INT); |
584 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_UNSIGNED32, BER_TYPE_INT); |
488 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_TIMETICKS , BER_TYPE_INT); |
585 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_TIMETICKS , BER_TYPE_INT); |
489 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_OPAQUE , BER_TYPE_IPADDRESS); |
586 | $SNMP_PROFILE->set (ASN_APPLICATION, SNMP_OPAQUE , BER_TYPE_IPADDRESS); |
… | |
… | |
491 | |
588 | |
492 | $DEFAULT_PROFILE->_set_default; |
589 | $DEFAULT_PROFILE->_set_default; |
493 | |
590 | |
494 | 1; |
591 | 1; |
495 | |
592 | |
496 | =head2 LIMITATIONS |
593 | =head2 LIMITATIONS/NOTES |
497 | |
594 | |
498 | This module can only en-/decode 64 bit signed and unsigned integers, and |
595 | This module can only en-/decode 64 bit signed and unsigned integers, and |
499 | only when your perl supports those. |
596 | only when your perl supports those. |
500 | |
597 | |
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|
598 | This module does not generally care about ranges, i.e. it will happily |
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|
599 | de-/encode 64 bit integers into an C<ASN_INTEGER32> value, or a negative |
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|
600 | number into an C<SNMP_COUNTER64>. |
|
|
601 | |
501 | OBJECT IDENTIFIEERs cannot have unlimited length, although the limit is |
602 | OBJECT IDENTIFIEERs cannot have unlimited length, although the limit is |
502 | much larger than e.g. the one imposed by SNMP or other protocols. |
603 | much larger than e.g. the one imposed by SNMP or other protocols,a nd is |
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|
604 | about 4kB. |
503 | |
605 | |
504 | REAL values are not supported and will croak. |
606 | REAL values are not supported and will currently croak. |
505 | |
607 | |
506 | This module has undergone little to no testing so far. |
608 | This module has undergone little to no testing so far. |
507 | |
609 | |
508 | =head2 ITHREADS SUPPORT |
610 | =head2 ITHREADS SUPPORT |
509 | |
611 | |