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comparison libtomcrypt/src/pk/asn1/der/utctime/der_encode_utctime.c @ 1471:6dba84798cd5

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Update to libtomcrypt 1.18.1, merged with Dropbear changes
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 21:44:05 +0800
parents f849a5ca2efc
children
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1470:8bba51a55704 1471:6dba84798cd5
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 #include "tomcrypt.h" 9 #include "tomcrypt.h"
12 10
13 /** 11 /**
14 @file der_encode_utctime.c 12 @file der_encode_utctime.c
15 ASN.1 DER, encode a UTCTIME, Tom St Denis 13 ASN.1 DER, encode a UTCTIME, Tom St Denis
16 */ 14 */
17 15
18 #ifdef LTC_DER 16 #ifdef LTC_DER
19 17
20 static const char *baseten = "0123456789"; 18 static const char * const baseten = "0123456789";
21 19
22 #define STORE_V(y) \ 20 #define STORE_V(y) \
23 out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \ 21 out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \
24 out[x++] = der_ia5_char_encode(baseten[y % 10]); 22 out[x++] = der_ia5_char_encode(baseten[y % 10]);
25 23
28 @param utctime The UTC time structure to encode 26 @param utctime The UTC time structure to encode
29 @param out The destination of the DER encoding of the UTC time structure 27 @param out The destination of the DER encoding of the UTC time structure
30 @param outlen [in/out] The length of the DER encoding 28 @param outlen [in/out] The length of the DER encoding
31 @return CRYPT_OK if successful 29 @return CRYPT_OK if successful
32 */ 30 */
33 int der_encode_utctime(ltc_utctime *utctime, 31 int der_encode_utctime(ltc_utctime *utctime,
34 unsigned char *out, unsigned long *outlen) 32 unsigned char *out, unsigned long *outlen)
35 { 33 {
36 unsigned long x, tmplen; 34 unsigned long x, tmplen;
37 int err; 35 int err;
38 36
39 LTC_ARGCHK(utctime != NULL); 37 LTC_ARGCHK(utctime != NULL);
40 LTC_ARGCHK(out != NULL); 38 LTC_ARGCHK(out != NULL);
41 LTC_ARGCHK(outlen != NULL); 39 LTC_ARGCHK(outlen != NULL);
42 40
43 if ((err = der_length_utctime(utctime, &tmplen)) != CRYPT_OK) { 41 if ((err = der_length_utctime(utctime, &tmplen)) != CRYPT_OK) {
45 } 43 }
46 if (tmplen > *outlen) { 44 if (tmplen > *outlen) {
47 *outlen = tmplen; 45 *outlen = tmplen;
48 return CRYPT_BUFFER_OVERFLOW; 46 return CRYPT_BUFFER_OVERFLOW;
49 } 47 }
50 48
51 /* store header */ 49 /* store header */
52 out[0] = 0x17; 50 out[0] = 0x17;
53 51
54 /* store values */ 52 /* store values */
55 x = 2; 53 x = 2;
68 out[x++] = der_ia5_char_encode('Z'); 66 out[x++] = der_ia5_char_encode('Z');
69 } 67 }
70 68
71 /* store length */ 69 /* store length */
72 out[1] = (unsigned char)(x - 2); 70 out[1] = (unsigned char)(x - 2);
73 71
74 /* all good let's return */ 72 /* all good let's return */
75 *outlen = x; 73 *outlen = x;
76 return CRYPT_OK; 74 return CRYPT_OK;
77 } 75 }
78 76
79 #endif 77 #endif
80 78
81 /* $Source$ */ 79 /* ref: $Format:%D$ */
82 /* $Revision$ */ 80 /* git commit: $Format:%H$ */
83 /* $Date$ */ 81 /* commit time: $Format:%ai$ */