/src/serenity/Userland/Libraries/LibCrypto/ASN1/ASN1.cpp

Source
/*
 * Copyright (c) 2021, the SerenityOS developers.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/GenericLexer.h>
#include <LibCrypto/ASN1/ASN1.h>

namespace Crypto::ASN1 {

ByteString kind_name(Kind kind)
{
    switch (kind) {
    case Kind::Eol:
        return "EndOfList";
    case Kind::Boolean:
        return "Boolean";
    case Kind::Integer:
        return "Integer";
    case Kind::BitString:
        return "BitString";
    case Kind::OctetString:
        return "OctetString";
    case Kind::Null:
        return "Null";
    case Kind::ObjectIdentifier:
        return "ObjectIdentifier";
    case Kind::ObjectDescriptor:
        return "ObjectDescriptor";
    case Kind::External:
        return "External";
    case Kind::Real:
        return "Real";
    case Kind::Enumerated:
        return "Enumerated";
    case Kind::EmbeddedPdv:
        return "EmbeddedPdv";
    case Kind::Utf8String:
        return "Utf8String";
    case Kind::RelativeOid:
        return "RelativeOid";
    case Kind::Time:
        return "Time";
    case Kind::Reserved:
        return "Reserved";
    case Kind::Sequence:
        return "Sequence";
    case Kind::Set:
        return "Set";
    case Kind::NumericString:
        return "NumericString";
    case Kind::PrintableString:
        return "PrintableString";
    case Kind::T61String:
        return "T61String";
    case Kind::VideotexString:
        return "VideotexString";
    case Kind::IA5String:
        return "IA5String";
    case Kind::UTCTime:
        return "UTCTime";
    case Kind::GeneralizedTime:
        return "GeneralizedTime";
    case Kind::GraphicString:
        return "GraphicString";
    case Kind::VisibleString:
        return "VisibleString";
    case Kind::GeneralString:
        return "GeneralString";
    case Kind::UniversalString:
        return "UniversalString";
    case Kind::CharacterString:
        return "CharacterString";
    case Kind::BMPString:
        return "BMPString";
    case Kind::Date:
        return "Date";
    case Kind::TimeOfDay:
        return "TimeOfDay";
    case Kind::DateTime:
        return "DateTime";
    case Kind::Duration:
        return "Duration";
    case Kind::OidIri:
        return "OidIri";
    case Kind::RelativeOidIri:
        return "RelativeOidIri";
    }

    return "InvalidKind";
}

ByteString class_name(Class class_)
{
    switch (class_) {
    case Class::Application:
        return "Application";
    case Class::Context:
        return "Context";
    case Class::Private:
        return "Private";
    case Class::Universal:
        return "Universal";
    }

    return "InvalidClass";
}

ByteString type_name(Type type)
{
    switch (type) {
    case Type::Constructed:
        return "Constructed";
    case Type::Primitive:
        return "Primitive";
    }

    return "InvalidType";
}

Optional<UnixDateTime> parse_utc_time(StringView time)
{
    // YYMMDDhhmm[ss]Z or YYMMDDhhmm[ss](+|-)hhmm
    GenericLexer lexer(time);
    auto year_in_century = lexer.consume(2).to_number<unsigned>();
    auto month = lexer.consume(2).to_number<unsigned>();
    auto day = lexer.consume(2).to_number<unsigned>();
    auto hour = lexer.consume(2).to_number<unsigned>();
    auto minute = lexer.consume(2).to_number<unsigned>();
    Optional<unsigned> seconds, offset_hours, offset_minutes;
    [[maybe_unused]] bool negative_offset = false;

    if (lexer.next_is(is_any_of("0123456789"sv))) {
        seconds = lexer.consume(2).to_number<unsigned>();
        if (!seconds.has_value()) {
            return {};
        }
    }

    if (lexer.next_is('Z')) {
        lexer.consume();
    } else if (lexer.next_is(is_any_of("+-"sv))) {
        negative_offset = lexer.consume() == '-';
        offset_hours = lexer.consume(2).to_number<unsigned>();
        offset_minutes = lexer.consume(2).to_number<unsigned>();
        if (!offset_hours.has_value() || !offset_minutes.has_value()) {
            return {};
        }
    } else {
        return {};
    }

    if (!year_in_century.has_value() || !month.has_value() || !day.has_value() || !hour.has_value() || !minute.has_value()) {
        return {};
    }

    // RFC5280 section 4.1.2.5.1.
    auto full_year = year_in_century.value();
    full_year += (full_year < 50) ? 2000 : 1900;
    auto full_seconds = seconds.value_or(0);

    // FIXME: Handle offsets!
    if (offset_hours.has_value() || offset_minutes.has_value())
        dbgln("FIXME: Implement UTCTime with offset!");

    return UnixDateTime::from_unix_time_parts(full_year, month.value(), day.value(), hour.value(), minute.value(), full_seconds, 0);
}

Optional<UnixDateTime> parse_generalized_time(StringView time)
{
    // YYYYMMDDhh[mm[ss[.fff]]] or YYYYMMDDhh[mm[ss[.fff]]]Z or YYYYMMDDhh[mm[ss[.fff]]](+|-)hhmm
    GenericLexer lexer(time);
    auto year = lexer.consume(4).to_number<unsigned>();
    auto month = lexer.consume(2).to_number<unsigned>();
    auto day = lexer.consume(2).to_number<unsigned>();
    auto hour = lexer.consume(2).to_number<unsigned>();
    Optional<unsigned> minute, seconds, milliseconds, offset_hours, offset_minutes;
    [[maybe_unused]] bool negative_offset = false;

    if (!lexer.is_eof()) {
        if (lexer.consume_specific('Z'))
            goto done_parsing;

        if (!lexer.next_is(is_any_of("+-"sv))) {
            minute = lexer.consume(2).to_number<unsigned>();
            if (!minute.has_value()) {
                return {};
            }
            if (lexer.is_eof() || lexer.consume_specific('Z'))
                goto done_parsing;
        }

        if (!lexer.next_is(is_any_of("+-"sv))) {
            seconds = lexer.consume(2).to_number<unsigned>();
            if (!seconds.has_value()) {
                return {};
            }
            if (lexer.is_eof() || lexer.consume_specific('Z'))
                goto done_parsing;
        }

        if (lexer.consume_specific('.')) {
            milliseconds = lexer.consume(3).to_number<unsigned>();
            if (!milliseconds.has_value()) {
                return {};
            }
            if (lexer.is_eof() || lexer.consume_specific('Z'))
                goto done_parsing;
        }

        if (lexer.next_is(is_any_of("+-"sv))) {
            negative_offset = lexer.consume() == '-';
            offset_hours = lexer.consume(2).to_number<unsigned>();
            offset_minutes = lexer.consume(2).to_number<unsigned>();
            if (!offset_hours.has_value() || !offset_minutes.has_value()) {
                return {};
            }
        }

        // Any character would be garbage.
        if (!lexer.is_eof()) {
            return {};
        }
    }

done_parsing:;

    if (!year.has_value() || !month.has_value() || !day.has_value() || !hour.has_value()) {
        return {};
    }

    // FIXME: Handle offsets!
    if (offset_hours.has_value() || offset_minutes.has_value())
        dbgln("FIXME: Implement GeneralizedTime with offset!");

    return UnixDateTime::from_unix_time_parts(year.value(), month.value(), day.value(), hour.value(), minute.value_or(0), seconds.value_or(0), milliseconds.value_or(0));
}
}

Coverage Report

Created: 2026-11-13 08:07

Line	Count	Source
1		/*
2		* Copyright (c) 2021, the SerenityOS developers.
3		*
4		* SPDX-License-Identifier: BSD-2-Clause
5		*/
6
7		#include <AK/GenericLexer.h>
8		#include <LibCrypto/ASN1/ASN1.h>
9
10		namespace Crypto::ASN1 {
11
12		ByteString kind_name(Kind kind)
13	695	{
14	695	switch (kind) {
15	203	case Kind::Eol:
16	203	return "EndOfList";
17	46	case Kind::Boolean:
18	46	return "Boolean";
19	23	case Kind::Integer:
20	23	return "Integer";
21	18	case Kind::BitString:
22	18	return "BitString";
23	9	case Kind::OctetString:
24	9	return "OctetString";
25	15	case Kind::Null:
26	15	return "Null";
27	21	case Kind::ObjectIdentifier:
28	21	return "ObjectIdentifier";
29	11	case Kind::ObjectDescriptor:
30	11	return "ObjectDescriptor";
31	20	case Kind::External:
32	20	return "External";
33	10	case Kind::Real:
34	10	return "Real";
35	13	case Kind::Enumerated:
36	13	return "Enumerated";
37	14	case Kind::EmbeddedPdv:
38	14	return "EmbeddedPdv";
39	6	case Kind::Utf8String:
40	6	return "Utf8String";
41	19	case Kind::RelativeOid:
42	19	return "RelativeOid";
43	16	case Kind::Time:
44	16	return "Time";
45	20	case Kind::Reserved:
46	20	return "Reserved";
47	18	case Kind::Sequence:
48	18	return "Sequence";
49	27	case Kind::Set:
50	27	return "Set";
51	10	case Kind::NumericString:
52	10	return "NumericString";
53	10	case Kind::PrintableString:
54	10	return "PrintableString";
55	13	case Kind::T61String:
56	13	return "T61String";
57	10	case Kind::VideotexString:
58	10	return "VideotexString";
59	3	case Kind::IA5String:
60	3	return "IA5String";
61	9	case Kind::UTCTime:
62	9	return "UTCTime";
63	6	case Kind::GeneralizedTime:
64	6	return "GeneralizedTime";
65	10	case Kind::GraphicString:
66	10	return "GraphicString";
67	7	case Kind::VisibleString:
68	7	return "VisibleString";
69	8	case Kind::GeneralString:
70	8	return "GeneralString";
71	4	case Kind::UniversalString:
72	4	return "UniversalString";
73	10	case Kind::CharacterString:
74	10	return "CharacterString";
75	21	case Kind::BMPString:
76	21	return "BMPString";
77	1	case Kind::Date:
78	1	return "Date";
79	2	case Kind::TimeOfDay:
80	2	return "TimeOfDay";
81	1	case Kind::DateTime:
82	1	return "DateTime";
83	1	case Kind::Duration:
84	1	return "Duration";
85	1	case Kind::OidIri:
86	1	return "OidIri";
87	1	case Kind::RelativeOidIri:
88	1	return "RelativeOidIri";
89	695	}
90
91	58	return "InvalidKind";
92	695	}
93
94		ByteString class_name(Class class_)
95	0	{
96	0	switch (class_) {
97	0	case Class::Application:
98	0	return "Application";
99	0	case Class::Context:
100	0	return "Context";
101	0	case Class::Private:
102	0	return "Private";
103	0	case Class::Universal:
104	0	return "Universal";
105	0	}
106
107	0	return "InvalidClass";
108	0	}
109
110		ByteString type_name(Type type)
111	0	{
112	0	switch (type) {
113	0	case Type::Constructed:
114	0	return "Constructed";
115	0	case Type::Primitive:
116	0	return "Primitive";
117	0	}
118
119	0	return "InvalidType";
120	0	}
121
122		Optional<UnixDateTime> parse_utc_time(StringView time)
123	2.09k	{
124		// YYMMDDhhmm[ss]Z or YYMMDDhhmm[ss](+\|-)hhmm
125	2.09k	GenericLexer lexer(time);
126	2.09k	auto year_in_century = lexer.consume(2).to_number<unsigned>();
127	2.09k	auto month = lexer.consume(2).to_number<unsigned>();
128	2.09k	auto day = lexer.consume(2).to_number<unsigned>();
129	2.09k	auto hour = lexer.consume(2).to_number<unsigned>();
130	2.09k	auto minute = lexer.consume(2).to_number<unsigned>();
131	2.09k	Optional<unsigned> seconds, offset_hours, offset_minutes;
132	2.09k	[[maybe_unused]] bool negative_offset = false;
133
134	2.09k	if (lexer.next_is(is_any_of("0123456789"sv))) {
135	1.77k	seconds = lexer.consume(2).to_number<unsigned>();
136	1.77k	if (!seconds.has_value()) {
137	1	return {};
138	1	}
139	1.77k	}
140
141	2.09k	if (lexer.next_is('Z')) {
142	2.05k	lexer.consume();
143	2.05k	} else if (lexer.next_is(is_any_of("+-"sv))) {
144	11	negative_offset = lexer.consume() == '-';
145	11	offset_hours = lexer.consume(2).to_number<unsigned>();
146	11	offset_minutes = lexer.consume(2).to_number<unsigned>();
147	11	if (!offset_hours.has_value() \|\| !offset_minutes.has_value()) {
148	5	return {};
149	5	}
150	35	} else {
151	35	return {};
152	35	}
153
154	2.05k	if (!year_in_century.has_value() \|\| !month.has_value() \|\| !day.has_value() \|\| !hour.has_value() \|\| !minute.has_value()) {
155	6	return {};
156	6	}
157
158		// RFC5280 section 4.1.2.5.1.
159	2.05k	auto full_year = year_in_century.value();
160	2.05k	full_year += (full_year < 50) ? 2000 : 1900;
161	2.05k	auto full_seconds = seconds.value_or(0);
162
163		// FIXME: Handle offsets!
164	2.05k	if (offset_hours.has_value() \|\| offset_minutes.has_value())
165	5	dbgln("FIXME: Implement UTCTime with offset!");
166
167	2.05k	return UnixDateTime::from_unix_time_parts(full_year, month.value(), day.value(), hour.value(), minute.value(), full_seconds, 0);
168	2.05k	}
169
170		Optional<UnixDateTime> parse_generalized_time(StringView time)
171	511	{
172		// YYYYMMDDhh[mm[ss[.fff]]] or YYYYMMDDhh[mm[ss[.fff]]]Z or YYYYMMDDhh[mm[ss[.fff]]](+\|-)hhmm
173	511	GenericLexer lexer(time);
174	511	auto year = lexer.consume(4).to_number<unsigned>();
175	511	auto month = lexer.consume(2).to_number<unsigned>();
176	511	auto day = lexer.consume(2).to_number<unsigned>();
177	511	auto hour = lexer.consume(2).to_number<unsigned>();
178	511	Optional<unsigned> minute, seconds, milliseconds, offset_hours, offset_minutes;
179	511	[[maybe_unused]] bool negative_offset = false;
180
181	511	if (!lexer.is_eof()) {
182	128	if (lexer.consume_specific('Z'))
183	23	goto done_parsing;
184
185	105	if (!lexer.next_is(is_any_of("+-"sv))) {
186	94	minute = lexer.consume(2).to_number<unsigned>();
187	94	if (!minute.has_value()) {
188	9	return {};
189	9	}
190	85	if (lexer.is_eof() \|\| lexer.consume_specific('Z'))
191	34	goto done_parsing;
192	85	}
193
194	62	if (!lexer.next_is(is_any_of("+-"sv))) {
195	50	seconds = lexer.consume(2).to_number<unsigned>();
196	50	if (!seconds.has_value()) {
197	8	return {};
198	8	}
199	42	if (lexer.is_eof() \|\| lexer.consume_specific('Z'))
200	8	goto done_parsing;
201	42	}
202
203	46	if (lexer.consume_specific('.')) {
204	18	milliseconds = lexer.consume(3).to_number<unsigned>();
205	18	if (!milliseconds.has_value()) {
206	1	return {};
207	1	}
208	17	if (lexer.is_eof() \|\| lexer.consume_specific('Z'))
209	6	goto done_parsing;
210	17	}
211
212	39	if (lexer.next_is(is_any_of("+-"sv))) {
213	16	negative_offset = lexer.consume() == '-';
214	16	offset_hours = lexer.consume(2).to_number<unsigned>();
215	16	offset_minutes = lexer.consume(2).to_number<unsigned>();
216	16	if (!offset_hours.has_value() \|\| !offset_minutes.has_value()) {
217	12	return {};
218	12	}
219	16	}
220
221		// Any character would be garbage.
222	27	if (!lexer.is_eof()) {
223	24	return {};
224	24	}
225	27	}
226
227	457	done_parsing:;
228
229	457	if (!year.has_value() \|\| !month.has_value() \|\| !day.has_value() \|\| !hour.has_value()) {
230	25	return {};
231	25	}
232
233		// FIXME: Handle offsets!
234	432	if (offset_hours.has_value() \|\| offset_minutes.has_value())
235	3	dbgln("FIXME: Implement GeneralizedTime with offset!");
236
237	432	return UnixDateTime::from_unix_time_parts(year.value(), month.value(), day.value(), hour.value(), minute.value_or(0), seconds.value_or(0), milliseconds.value_or(0));
238	457	}
239		}