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_teletex_string.c
14 ASN.1 DER, get length of teletex STRING
15 */
16
17 #ifdef LTC_DER
18
19 static const struct {
20 int code, value;
21 } teletex_table[] = {
22 { '\0', 0 },
23 { '\a', 7 },
24 { '\b', 8 },
25 { '\t', 9 },
26 { '\n', 10 },
27 { '\v', 11 },
28 { '\f', 12 },
29 { '\r', 13 },
30 { ' ', 32 },
31 { '!', 33 },
32 { '"', 34 },
33 { '%', 37 },
34 { '&', 38 },
35 { '\'', 39 },
36 { '(', 40 },
37 { ')', 41 },
38 { '+', 43 },
39 { ',', 44 },
40 { '-', 45 },
41 { '.', 46 },
42 { '/', 47 },
43 { '0', 48 },
44 { '1', 49 },
45 { '2', 50 },
46 { '3', 51 },
47 { '4', 52 },
48 { '5', 53 },
49 { '6', 54 },
50 { '7', 55 },
51 { '8', 56 },
52 { '9', 57 },
53 { ':', 58 },
54 { ';', 59 },
55 { '<', 60 },
56 { '=', 61 },
57 { '>', 62 },
58 { '?', 63 },
59 { '@', 64 },
60 { 'A', 65 },
61 { 'B', 66 },
62 { 'C', 67 },
63 { 'D', 68 },
64 { 'E', 69 },
65 { 'F', 70 },
66 { 'G', 71 },
67 { 'H', 72 },
68 { 'I', 73 },
69 { 'J', 74 },
70 { 'K', 75 },
71 { 'L', 76 },
72 { 'M', 77 },
73 { 'N', 78 },
74 { 'O', 79 },
75 { 'P', 80 },
76 { 'Q', 81 },
77 { 'R', 82 },
78 { 'S', 83 },
79 { 'T', 84 },
80 { 'U', 85 },
81 { 'V', 86 },
82 { 'W', 87 },
83 { 'X', 88 },
84 { 'Y', 89 },
85 { 'Z', 90 },
86 { '[', 91 },
87 { ']', 93 },
88 { '_', 95 },
89 { 'a', 97 },
90 { 'b', 98 },
91 { 'c', 99 },
92 { 'd', 100 },
93 { 'e', 101 },
94 { 'f', 102 },
95 { 'g', 103 },
96 { 'h', 104 },
97 { 'i', 105 },
98 { 'j', 106 },
99 { 'k', 107 },
100 { 'l', 108 },
101 { 'm', 109 },
102 { 'n', 110 },
103 { 'o', 111 },
104 { 'p', 112 },
105 { 'q', 113 },
106 { 'r', 114 },
107 { 's', 115 },
108 { 't', 116 },
109 { 'u', 117 },
110 { 'v', 118 },
111 { 'w', 119 },
112 { 'x', 120 },
113 { 'y', 121 },
114 { 'z', 122 },
115 { '|', 124 },
116 { ' ', 160 },
117 { 0xa1, 161 },
118 { 0xa2, 162 },
119 { 0xa3, 163 },
120 { '$', 164 },
121 { 0xa5, 165 },
122 { '#', 166 },
123 { 0xa7, 167 },
124 { 0xa4, 168 },
125 { 0xab, 171 },
126 { 0xb0, 176 },
127 { 0xb1, 177 },
128 { 0xb2, 178 },
129 { 0xb3, 179 },
130 { 0xd7, 180 },
131 { 0xb5, 181 },
132 { 0xb6, 182 },
133 { 0xb7, 183 },
134 { 0xf7, 184 },
135 { 0xbb, 187 },
136 { 0xbc, 188 },
137 { 0xbd, 189 },
138 { 0xbe, 190 },
139 { 0xbf, 191 },
140 };
141
der_teletex_char_encode(int c)142 int der_teletex_char_encode(int c)
143 {
144 int x;
145 for (x = 0; x < (int)(sizeof(teletex_table)/sizeof(teletex_table[0])); x++) {
146 if (teletex_table[x].code == c) {
147 return teletex_table[x].value;
148 }
149 }
150 return -1;
151 }
152
der_teletex_value_decode(int v)153 int der_teletex_value_decode(int v)
154 {
155 int x;
156 for (x = 0; x < (int)(sizeof(teletex_table)/sizeof(teletex_table[0])); x++) {
157 if (teletex_table[x].value == v) {
158 return teletex_table[x].code;
159 }
160 }
161 return -1;
162 }
163
164 /**
165 Gets length of DER encoding of teletex STRING
166 @param octets The values you want to encode
167 @param noctets The number of octets in the string to encode
168 @param outlen [out] The length of the DER encoding for the given string
169 @return CRYPT_OK if successful
170 */
der_length_teletex_string(const unsigned char * octets,unsigned long noctets,unsigned long * outlen)171 int der_length_teletex_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen)
172 {
173 unsigned long x;
174 int err;
175
176 LTC_ARGCHK(outlen != NULL);
177 LTC_ARGCHK(octets != NULL);
178
179 /* scan string for validity */
180 for (x = 0; x < noctets; x++) {
181 if (der_teletex_char_encode(octets[x]) == -1) {
182 return CRYPT_INVALID_ARG;
183 }
184 }
185
186 if ((err = der_length_asn1_length(noctets, &x)) != CRYPT_OK) {
187 return err;
188 }
189 *outlen = 1 + x + noctets;
190
191 return CRYPT_OK;
192 }
193
194 #endif
195
196
197 /* ref: $Format:%D$ */
198 /* git commit: $Format:%H$ */
199 /* commit time: $Format:%ai$ */
200