/src/botan/src/lib/asn1/asn1_obj.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * ASN.1 Internals |
3 | | * (C) 1999-2007,2018 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #include <botan/asn1_obj.h> |
9 | | #include <botan/der_enc.h> |
10 | | #include <botan/data_src.h> |
11 | | #include <botan/internal/stl_util.h> |
12 | | #include <sstream> |
13 | | |
14 | | namespace Botan { |
15 | | |
16 | | std::vector<uint8_t> ASN1_Object::BER_encode() const |
17 | 9.16k | { |
18 | 9.16k | std::vector<uint8_t> output; |
19 | 9.16k | DER_Encoder der(output); |
20 | 9.16k | this->encode_into(der); |
21 | 9.16k | return output; |
22 | 9.16k | } |
23 | | |
24 | | /* |
25 | | * Check a type invariant on BER data |
26 | | */ |
27 | | void BER_Object::assert_is_a(ASN1_Type expected_type_tag, ASN1_Class expected_class_tag, |
28 | | const std::string& descr) const |
29 | 649k | { |
30 | 649k | if(this->is_a(expected_type_tag, expected_class_tag) == false) |
31 | 15.4k | { |
32 | 15.4k | std::stringstream msg; |
33 | | |
34 | 15.4k | msg << "Tag mismatch when decoding " << descr << " got "; |
35 | | |
36 | 15.4k | if(m_class_tag == ASN1_Class::NoObject && m_type_tag == ASN1_Type::NoObject) |
37 | 2.16k | { |
38 | 2.16k | msg << "EOF"; |
39 | 2.16k | } |
40 | 13.3k | else |
41 | 13.3k | { |
42 | 13.3k | if(m_class_tag == ASN1_Class::Universal || m_class_tag == ASN1_Class::Constructed) |
43 | 8.91k | { |
44 | 8.91k | msg << asn1_tag_to_string(m_type_tag); |
45 | 8.91k | } |
46 | 4.40k | else |
47 | 4.40k | { |
48 | 4.40k | msg << std::to_string(static_cast<uint32_t>(m_type_tag)); |
49 | 4.40k | } |
50 | | |
51 | 13.3k | msg << "/" << asn1_class_to_string(m_class_tag); |
52 | 13.3k | } |
53 | | |
54 | 15.4k | msg << " expected "; |
55 | | |
56 | 15.4k | if(expected_class_tag == ASN1_Class::Universal || expected_class_tag == ASN1_Class::Constructed) |
57 | 15.1k | { |
58 | 15.1k | msg << asn1_tag_to_string(expected_type_tag); |
59 | 15.1k | } |
60 | 290 | else |
61 | 290 | { |
62 | 290 | msg << std::to_string(static_cast<uint32_t>(expected_type_tag)); |
63 | 290 | } |
64 | | |
65 | 15.4k | msg << "/" << asn1_class_to_string(expected_class_tag); |
66 | | |
67 | 15.4k | throw BER_Decoding_Error(msg.str()); |
68 | 15.4k | } |
69 | 649k | } |
70 | | |
71 | | bool BER_Object::is_a(ASN1_Type expected_type_tag, ASN1_Class expected_class_tag) const |
72 | 1.05M | { |
73 | 1.05M | return (m_type_tag == expected_type_tag && m_class_tag == expected_class_tag); |
74 | 1.05M | } |
75 | | |
76 | | bool BER_Object::is_a(int expected_type_tag, ASN1_Class expected_class_tag) const |
77 | 309k | { |
78 | 309k | return is_a(ASN1_Type(expected_type_tag), expected_class_tag); |
79 | 309k | } |
80 | | |
81 | | void BER_Object::set_tagging(ASN1_Type type_tag, ASN1_Class class_tag) |
82 | 1.33M | { |
83 | 1.33M | m_type_tag = type_tag; |
84 | 1.33M | m_class_tag = class_tag; |
85 | 1.33M | } |
86 | | |
87 | | std::string asn1_class_to_string(ASN1_Class type) |
88 | 28.7k | { |
89 | 28.7k | switch(type) |
90 | 28.7k | { |
91 | 10.7k | case ASN1_Class::Universal: |
92 | 10.7k | return "UNIVERSAL"; |
93 | 13.3k | case ASN1_Class::Constructed: |
94 | 13.3k | return "CONSTRUCTED"; |
95 | 1.38k | case ASN1_Class::ContextSpecific: |
96 | 1.38k | return "CONTEXT_SPECIFIC"; |
97 | 996 | case ASN1_Class::Application: |
98 | 996 | return "APPLICATION"; |
99 | 1.03k | case ASN1_Class::Private: |
100 | 1.03k | return "PRIVATE"; |
101 | 0 | case ASN1_Class::NoObject: |
102 | 0 | return "NO_OBJECT"; |
103 | 1.28k | default: |
104 | 1.28k | return "CLASS(" + std::to_string(static_cast<size_t>(type)) + ")"; |
105 | 28.7k | } |
106 | 28.7k | } |
107 | | |
108 | | std::string asn1_tag_to_string(ASN1_Type type) |
109 | 24.1k | { |
110 | 24.1k | switch(type) |
111 | 24.1k | { |
112 | 8.65k | case ASN1_Type::Sequence: |
113 | 8.65k | return "SEQUENCE"; |
114 | | |
115 | 849 | case ASN1_Type::Set: |
116 | 849 | return "SET"; |
117 | | |
118 | 294 | case ASN1_Type::PrintableString: |
119 | 294 | return "PRINTABLE STRING"; |
120 | | |
121 | 407 | case ASN1_Type::NumericString: |
122 | 407 | return "NUMERIC STRING"; |
123 | | |
124 | 240 | case ASN1_Type::Ia5String: |
125 | 240 | return "IA5 STRING"; |
126 | | |
127 | 347 | case ASN1_Type::TeletexString: |
128 | 347 | return "T61 STRING"; |
129 | | |
130 | 184 | case ASN1_Type::Utf8String: |
131 | 184 | return "UTF8 STRING"; |
132 | | |
133 | 255 | case ASN1_Type::VisibleString: |
134 | 255 | return "VISIBLE STRING"; |
135 | | |
136 | 121 | case ASN1_Type::BmpString: |
137 | 121 | return "BMP STRING"; |
138 | | |
139 | 94 | case ASN1_Type::UniversalString: |
140 | 94 | return "UNIVERSAL STRING"; |
141 | | |
142 | 140 | case ASN1_Type::UtcTime: |
143 | 140 | return "UTC TIME"; |
144 | | |
145 | 358 | case ASN1_Type::GeneralizedTime: |
146 | 358 | return "GENERALIZED TIME"; |
147 | | |
148 | 2.85k | case ASN1_Type::OctetString: |
149 | 2.85k | return "OCTET STRING"; |
150 | | |
151 | 2.63k | case ASN1_Type::BitString: |
152 | 2.63k | return "BIT STRING"; |
153 | | |
154 | 1.90k | case ASN1_Type::Enumerated: |
155 | 1.90k | return "ENUMERATED"; |
156 | | |
157 | 1.39k | case ASN1_Type::Integer: |
158 | 1.39k | return "INTEGER"; |
159 | | |
160 | 191 | case ASN1_Type::Null: |
161 | 191 | return "NULL"; |
162 | | |
163 | 247 | case ASN1_Type::ObjectId: |
164 | 247 | return "OBJECT"; |
165 | | |
166 | 294 | case ASN1_Type::Boolean: |
167 | 294 | return "BOOLEAN"; |
168 | | |
169 | 46 | case ASN1_Type::NoObject: |
170 | 46 | return "NO_OBJECT"; |
171 | | |
172 | 2.58k | default: |
173 | 2.58k | return "TAG(" + std::to_string(static_cast<uint32_t>(type)) + ")"; |
174 | 24.1k | } |
175 | 24.1k | } |
176 | | |
177 | | /* |
178 | | * BER Decoding Exceptions |
179 | | */ |
180 | | BER_Decoding_Error::BER_Decoding_Error(const std::string& str) : |
181 | 32.5k | Decoding_Error("BER: " + str) {} |
182 | | |
183 | | BER_Bad_Tag::BER_Bad_Tag(const std::string& str, uint32_t tagging) : |
184 | 2.40k | BER_Decoding_Error(str + ": " + std::to_string(tagging)) {} |
185 | | |
186 | | namespace ASN1 { |
187 | | |
188 | | /* |
189 | | * Put some arbitrary bytes into a SEQUENCE |
190 | | */ |
191 | | std::vector<uint8_t> put_in_sequence(const std::vector<uint8_t>& contents) |
192 | 36.7k | { |
193 | 36.7k | return ASN1::put_in_sequence(contents.data(), contents.size()); |
194 | 36.7k | } |
195 | | |
196 | | std::vector<uint8_t> put_in_sequence(const uint8_t bits[], size_t len) |
197 | 36.7k | { |
198 | 36.7k | std::vector<uint8_t> output; |
199 | 36.7k | DER_Encoder(output) |
200 | 36.7k | .start_sequence() |
201 | 36.7k | .raw_bytes(bits, len) |
202 | 36.7k | .end_cons(); |
203 | 36.7k | return output; |
204 | 36.7k | } |
205 | | |
206 | | /* |
207 | | * Convert a BER object into a string object |
208 | | */ |
209 | | std::string to_string(const BER_Object& obj) |
210 | 167k | { |
211 | 167k | return std::string(cast_uint8_ptr_to_char(obj.bits()), |
212 | 167k | obj.length()); |
213 | 167k | } |
214 | | |
215 | | /* |
216 | | * Do heuristic tests for BER data |
217 | | */ |
218 | | bool maybe_BER(DataSource& source) |
219 | 28.4k | { |
220 | 28.4k | uint8_t first_u8; |
221 | 28.4k | if(!source.peek_byte(first_u8)) |
222 | 2 | { |
223 | 2 | BOTAN_ASSERT_EQUAL(source.read_byte(first_u8), 0, "Expected EOF"); |
224 | 2 | throw Stream_IO_Error("ASN1::maybe_BER: Source was empty"); |
225 | 2 | } |
226 | | |
227 | 28.4k | const auto cons_seq = static_cast<uint8_t>(ASN1_Class::Constructed) | static_cast<uint8_t>(ASN1_Type::Sequence); |
228 | 28.4k | if(first_u8 == cons_seq) |
229 | 21.4k | return true; |
230 | 6.97k | return false; |
231 | 6.97k | } |
232 | | |
233 | | } |
234 | | |
235 | | } |