1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis */
2 /* SPDX-License-Identifier: Unlicense */
3 #include "tomcrypt_private.h"
4
5 /**
6 @file der_encode_ia5_string.c
7 ASN.1 DER, encode a IA5 STRING, Tom St Denis
8 */
9
10 #ifdef LTC_DER
11
12 /**
13 Store an IA5 STRING
14 @param in The array of IA5 to store (one per char)
15 @param inlen The number of IA5 to store
16 @param out [out] The destination for the DER encoded IA5 STRING
17 @param outlen [in/out] The max size and resulting size of the DER IA5 STRING
18 @return CRYPT_OK if successful
19 */
der_encode_ia5_string(const unsigned char * in,unsigned long inlen,unsigned char * out,unsigned long * outlen)20 int der_encode_ia5_string(const unsigned char *in, unsigned long inlen,
21 unsigned char *out, unsigned long *outlen)
22 {
23 unsigned long x, y, len;
24 int err;
25
26 LTC_ARGCHK(in != NULL);
27 LTC_ARGCHK(out != NULL);
28 LTC_ARGCHK(outlen != NULL);
29
30 /* get the size */
31 if ((err = der_length_ia5_string(in, inlen, &len)) != CRYPT_OK) {
32 return err;
33 }
34
35 /* too big? */
36 if (len > *outlen) {
37 *outlen = len;
38 return CRYPT_BUFFER_OVERFLOW;
39 }
40
41 /* encode the header+len */
42 x = 0;
43 out[x++] = 0x16;
44 len = *outlen - x;
45 if ((err = der_encode_asn1_length(inlen, out + x, &len)) != CRYPT_OK) {
46 return err;
47 }
48 x += len;
49
50 /* store octets */
51 for (y = 0; y < inlen; y++) {
52 out[x++] = der_ia5_char_encode(in[y]);
53 }
54
55 /* retun length */
56 *outlen = x;
57
58 return CRYPT_OK;
59 }
60
61 #endif
62