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comparison libtomcrypt/src/pk/asn1/der/ia5/der_encode_ia5_string.c @ 399:a707e6148060

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merge of '5fdf69ca60d1683cdd9f4c2595134bed26394834' and '6b61c50f4cf888bea302ac8fcf5dbb573b443251'
author Matt Johnston <matt@ucc.asn.au>
date Sat, 03 Feb 2007 08:20:34 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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394:17d097fc111c 399:a707e6148060
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file der_encode_ia5_string.c
15 ASN.1 DER, encode a IA5 STRING, Tom St Denis
16 */
17
18 #ifdef LTC_DER
19
20 /**
21 Store an IA5 STRING
22 @param in The array of IA5 to store (one per char)
23 @param inlen The number of IA5 to store
24 @param out [out] The destination for the DER encoded IA5 STRING
25 @param outlen [in/out] The max size and resulting size of the DER IA5 STRING
26 @return CRYPT_OK if successful
27 */
28 int der_encode_ia5_string(const unsigned char *in, unsigned long inlen,
29 unsigned char *out, unsigned long *outlen)
30 {
31 unsigned long x, y, len;
32 int err;
33
34 LTC_ARGCHK(in != NULL);
35 LTC_ARGCHK(out != NULL);
36 LTC_ARGCHK(outlen != NULL);
37
38 /* get the size */
39 if ((err = der_length_ia5_string(in, inlen, &len)) != CRYPT_OK) {
40 return err;
41 }
42
43 /* too big? */
44 if (len > *outlen) {
45 *outlen = len;
46 return CRYPT_BUFFER_OVERFLOW;
47 }
48
49 /* encode the header+len */
50 x = 0;
51 out[x++] = 0x16;
52 if (inlen < 128) {
53 out[x++] = (unsigned char)inlen;
54 } else if (inlen < 256) {
55 out[x++] = 0x81;
56 out[x++] = (unsigned char)inlen;
57 } else if (inlen < 65536UL) {
58 out[x++] = 0x82;
59 out[x++] = (unsigned char)((inlen>>8)&255);
60 out[x++] = (unsigned char)(inlen&255);
61 } else if (inlen < 16777216UL) {
62 out[x++] = 0x83;
63 out[x++] = (unsigned char)((inlen>>16)&255);
64 out[x++] = (unsigned char)((inlen>>8)&255);
65 out[x++] = (unsigned char)(inlen&255);
66 } else {
67 return CRYPT_INVALID_ARG;
68 }
69
70 /* store octets */
71 for (y = 0; y < inlen; y++) {
72 out[x++] = der_ia5_char_encode(in[y]);
73 }
74
75 /* retun length */
76 *outlen = x;
77
78 return CRYPT_OK;
79 }
80
81 #endif
82
83 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/ia5/der_encode_ia5_string.c,v $ */
84 /* $Revision: 1.4 $ */
85 /* $Date: 2006/12/04 21:34:03 $ */