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comparison libtomcrypt/src/pk/asn1/der/printable_string/der_encode_printable_string.c @ 285:1b9e69c058d2

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propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
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children 0cbe8f6dbf9e
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281:997e6f7dc01e 285:1b9e69c058d2
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.org
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file der_encode_printable_string.c
15 ASN.1 DER, encode a printable STRING, Tom St Denis
16 */
17
18 #ifdef LTC_DER
19
20 /**
21 Store an printable STRING
22 @param in The array of printable to store (one per char)
23 @param inlen The number of printable to store
24 @param out [out] The destination for the DER encoded printable STRING
25 @param outlen [in/out] The max size and resulting size of the DER printable STRING
26 @return CRYPT_OK if successful
27 */
28 int der_encode_printable_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_printable_string(in, inlen, &len)) != CRYPT_OK) {
40 return err;
41 }
42
43 /* too big? */
44 if (len > *outlen) {
45 return CRYPT_BUFFER_OVERFLOW;
46 }
47
48 /* encode the header+len */
49 x = 0;
50 out[x++] = 0x13;
51 if (inlen < 128) {
52 out[x++] = inlen;
53 } else if (inlen < 256) {
54 out[x++] = 0x81;
55 out[x++] = inlen;
56 } else if (inlen < 65536UL) {
57 out[x++] = 0x82;
58 out[x++] = (inlen>>8)&255;
59 out[x++] = inlen&255;
60 } else if (inlen < 16777216UL) {
61 out[x++] = 0x83;
62 out[x++] = (inlen>>16)&255;
63 out[x++] = (inlen>>8)&255;
64 out[x++] = inlen&255;
65 } else {
66 return CRYPT_INVALID_ARG;
67 }
68
69 /* store octets */
70 for (y = 0; y < inlen; y++) {
71 out[x++] = der_printable_char_encode(in[y]);
72 }
73
74 /* retun length */
75 *outlen = x;
76
77 return CRYPT_OK;
78 }
79
80 #endif
81
82 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/printable_string/der_encode_printable_string.c,v $ */
83 /* $Revision: 1.1 $ */
84 /* $Date: 2005/05/21 02:29:54 $ */