1 // SPDX-License-Identifier: BSD-2-Clause
2 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
3 *
4 * LibTomCrypt is a library that provides various cryptographic
5 * algorithms in a highly modular and flexible manner.
6 *
7 * The library is free for all purposes without any express
8 * guarantee it works.
9 */
10 #include "tomcrypt_private.h"
11
12 /**
13 @file der_length_ia5_string.c
14 ASN.1 DER, get length of IA5 STRING, Tom St Denis
15 */
16
17 #ifdef LTC_DER
18
19 static const struct {
20 int code, value;
21 } ia5_table[] = {
22 { '\0', 0 },
23 { '\a', 7 },
24 { '\b', 8 },
25 { '\t', 9 },
26 { '\n', 10 },
27 { '\f', 12 },
28 { '\r', 13 },
29 { ' ', 32 },
30 { '!', 33 },
31 { '"', 34 },
32 { '#', 35 },
33 { '$', 36 },
34 { '%', 37 },
35 { '&', 38 },
36 { '\'', 39 },
37 { '(', 40 },
38 { ')', 41 },
39 { '*', 42 },
40 { '+', 43 },
41 { ',', 44 },
42 { '-', 45 },
43 { '.', 46 },
44 { '/', 47 },
45 { '0', 48 },
46 { '1', 49 },
47 { '2', 50 },
48 { '3', 51 },
49 { '4', 52 },
50 { '5', 53 },
51 { '6', 54 },
52 { '7', 55 },
53 { '8', 56 },
54 { '9', 57 },
55 { ':', 58 },
56 { ';', 59 },
57 { '<', 60 },
58 { '=', 61 },
59 { '>', 62 },
60 { '?', 63 },
61 { '@', 64 },
62 { 'A', 65 },
63 { 'B', 66 },
64 { 'C', 67 },
65 { 'D', 68 },
66 { 'E', 69 },
67 { 'F', 70 },
68 { 'G', 71 },
69 { 'H', 72 },
70 { 'I', 73 },
71 { 'J', 74 },
72 { 'K', 75 },
73 { 'L', 76 },
74 { 'M', 77 },
75 { 'N', 78 },
76 { 'O', 79 },
77 { 'P', 80 },
78 { 'Q', 81 },
79 { 'R', 82 },
80 { 'S', 83 },
81 { 'T', 84 },
82 { 'U', 85 },
83 { 'V', 86 },
84 { 'W', 87 },
85 { 'X', 88 },
86 { 'Y', 89 },
87 { 'Z', 90 },
88 { '[', 91 },
89 { '\\', 92 },
90 { ']', 93 },
91 { '^', 94 },
92 { '_', 95 },
93 { '`', 96 },
94 { 'a', 97 },
95 { 'b', 98 },
96 { 'c', 99 },
97 { 'd', 100 },
98 { 'e', 101 },
99 { 'f', 102 },
100 { 'g', 103 },
101 { 'h', 104 },
102 { 'i', 105 },
103 { 'j', 106 },
104 { 'k', 107 },
105 { 'l', 108 },
106 { 'm', 109 },
107 { 'n', 110 },
108 { 'o', 111 },
109 { 'p', 112 },
110 { 'q', 113 },
111 { 'r', 114 },
112 { 's', 115 },
113 { 't', 116 },
114 { 'u', 117 },
115 { 'v', 118 },
116 { 'w', 119 },
117 { 'x', 120 },
118 { 'y', 121 },
119 { 'z', 122 },
120 { '{', 123 },
121 { '|', 124 },
122 { '}', 125 },
123 { '~', 126 }
124 };
125
der_ia5_char_encode(int c)126 int der_ia5_char_encode(int c)
127 {
128 int x;
129 for (x = 0; x < (int)(sizeof(ia5_table)/sizeof(ia5_table[0])); x++) {
130 if (ia5_table[x].code == c) {
131 return ia5_table[x].value;
132 }
133 }
134 return -1;
135 }
136
der_ia5_value_decode(int v)137 int der_ia5_value_decode(int v)
138 {
139 int x;
140 for (x = 0; x < (int)(sizeof(ia5_table)/sizeof(ia5_table[0])); x++) {
141 if (ia5_table[x].value == v) {
142 return ia5_table[x].code;
143 }
144 }
145 return -1;
146 }
147
148 /**
149 Gets length of DER encoding of IA5 STRING
150 @param octets The values you want to encode
151 @param noctets The number of octets in the string to encode
152 @param outlen [out] The length of the DER encoding for the given string
153 @return CRYPT_OK if successful
154 */
der_length_ia5_string(const unsigned char * octets,unsigned long noctets,unsigned long * outlen)155 int der_length_ia5_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen)
156 {
157 unsigned long x;
158 int err;
159
160 LTC_ARGCHK(outlen != NULL);
161 LTC_ARGCHK(octets != NULL);
162
163 /* scan string for validity */
164 for (x = 0; x < noctets; x++) {
165 if (der_ia5_char_encode(octets[x]) == -1) {
166 return CRYPT_INVALID_ARG;
167 }
168 }
169
170 if ((err = der_length_asn1_length(noctets, &x)) != CRYPT_OK) {
171 return err;
172 }
173 *outlen = 1 + x + noctets;
174
175 return CRYPT_OK;
176 }
177
178 #endif
179
180
181 /* ref: $Format:%D$ */
182 /* git commit: $Format:%H$ */
183 /* commit time: $Format:%ai$ */
184