Harald Welte | 2d4f2bd | 2016-01-03 17:14:54 +0100 | [diff] [blame] | 1 | /* helper functions to dela with asn1c data types */ |
| 2 | |
| 3 | /* (C) 2014-2015 by Harald Welte <laforge@gnumonks.org> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU Affero General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <string.h> |
| 22 | #include <errno.h> |
| 23 | #include <arpa/inet.h> |
| 24 | |
| 25 | #include <osmocom/core/utils.h> |
| 26 | |
| 27 | #include "asn1helpers.h" |
| 28 | #include "asn_internal.h" |
| 29 | |
| 30 | void asn1_u32_to_bitstring(BIT_STRING_t *bitstr, uint32_t *buf, uint32_t in) |
| 31 | { |
| 32 | *buf = htonl(in); |
| 33 | bitstr->buf = (uint8_t *) buf; |
| 34 | bitstr->size = sizeof(uint32_t); |
| 35 | bitstr->bits_unused = 0; |
| 36 | } |
| 37 | |
| 38 | void asn1_u28_to_bitstring(BIT_STRING_t *bitstr, uint32_t *buf, uint32_t in) |
| 39 | { |
| 40 | *buf = htonl(in<<4); |
| 41 | bitstr->buf = (uint8_t *) buf; |
| 42 | bitstr->size = sizeof(uint32_t); |
| 43 | bitstr->bits_unused = 4; |
| 44 | } |
| 45 | |
| 46 | void asn1_u24_to_bitstring(BIT_STRING_t *bitstr, uint32_t *buf, uint32_t in) |
| 47 | { |
| 48 | *buf = htonl(in<<8); |
| 49 | bitstr->buf = (uint8_t *) buf; |
| 50 | bitstr->size = 24/8; |
| 51 | bitstr->bits_unused = 0; |
| 52 | } |
| 53 | |
| 54 | int BIT_STRING_fromBuf(BIT_STRING_t *st, const uint8_t *str, unsigned int bit_len) |
| 55 | { |
| 56 | void *buf; |
| 57 | unsigned int len = bit_len / 8; |
| 58 | |
| 59 | if (bit_len % 8) |
| 60 | len++; |
| 61 | |
| 62 | if (!st || (!str && len)) { |
| 63 | errno = EINVAL; |
| 64 | return -1; |
| 65 | } |
| 66 | |
| 67 | if (!str) { |
| 68 | FREEMEM(st->buf); |
| 69 | st->buf = 0; |
| 70 | st->size = 0; |
| 71 | st->bits_unused = 0; |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | if (len < 0) |
Neels Hofmeyr | 578ecbb | 2016-02-16 12:23:23 +0100 | [diff] [blame^] | 76 | len = strlen((char*)str); |
Harald Welte | 2d4f2bd | 2016-01-03 17:14:54 +0100 | [diff] [blame] | 77 | |
| 78 | buf = MALLOC(len); |
| 79 | if (!buf) { |
| 80 | errno = ENOMEM; |
| 81 | return -1; |
| 82 | } |
| 83 | |
| 84 | memcpy(buf, str, len); |
| 85 | FREEMEM(st->buf); |
| 86 | st->buf = buf; |
| 87 | st->size = len; |
| 88 | st->bits_unused = (len * 8) - bit_len; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
Daniel Willmann | 95a112f | 2016-02-02 16:38:40 +0100 | [diff] [blame] | 93 | void asn1_u32_to_str(OCTET_STRING_t *str, uint32_t *buf, uint32_t in) |
| 94 | { |
| 95 | *buf = htonl(in); |
| 96 | str->buf = (uint8_t *) buf; |
| 97 | str->size = sizeof(uint32_t); |
| 98 | } |
| 99 | |
Harald Welte | 2d4f2bd | 2016-01-03 17:14:54 +0100 | [diff] [blame] | 100 | void asn1_u16_to_str(OCTET_STRING_t *str, uint16_t *buf, uint16_t in) |
| 101 | { |
| 102 | *buf = htons(in); |
| 103 | str->buf = (uint8_t *) buf; |
| 104 | str->size = sizeof(uint16_t); |
| 105 | } |
| 106 | |
| 107 | void asn1_u8_to_str(OCTET_STRING_t *str, uint8_t *buf, uint8_t in) |
| 108 | { |
| 109 | *buf = in; |
| 110 | str->buf = buf; |
| 111 | str->size = sizeof(uint8_t); |
| 112 | } |
| 113 | |
| 114 | int asn1_strncpy(char *out, const OCTET_STRING_t *in, size_t n) |
| 115 | { |
| 116 | size_t cpylen = n-1; |
| 117 | |
| 118 | if (in->size < cpylen) |
| 119 | cpylen = in->size; |
| 120 | |
| 121 | strncpy(out, (char *)in->buf, cpylen); |
| 122 | out[cpylen] = '\0'; |
| 123 | |
| 124 | return cpylen; |
| 125 | } |
| 126 | |
Daniel Willmann | 95a112f | 2016-02-02 16:38:40 +0100 | [diff] [blame] | 127 | uint32_t asn1str_to_u32(const OCTET_STRING_t *in) |
| 128 | { |
| 129 | OSMO_ASSERT(in && in->size == sizeof(uint32_t)); |
| 130 | return ntohl(*(uint32_t *)in->buf); |
| 131 | } |
| 132 | |
Harald Welte | 2d4f2bd | 2016-01-03 17:14:54 +0100 | [diff] [blame] | 133 | uint16_t asn1str_to_u16(const OCTET_STRING_t *in) |
| 134 | { |
| 135 | OSMO_ASSERT(in && in->size == sizeof(uint16_t)); |
| 136 | return ntohs(*(uint16_t *)in->buf); |
| 137 | } |
| 138 | |
| 139 | uint8_t asn1str_to_u8(const OCTET_STRING_t *in) |
| 140 | { |
| 141 | OSMO_ASSERT(in && in->size == sizeof(uint8_t)); |
| 142 | return *(uint8_t *)in->buf; |
| 143 | } |
| 144 | |
| 145 | uint32_t asn1bitstr_to_u32(const BIT_STRING_t *in) |
| 146 | { |
| 147 | OSMO_ASSERT(in && in->size == sizeof(uint32_t)); |
| 148 | |
| 149 | return ntohl(*(uint32_t *)in->buf); |
| 150 | } |
| 151 | |
| 152 | uint32_t asn1bitstr_to_u28(const BIT_STRING_t *in) |
| 153 | { |
| 154 | OSMO_ASSERT(in && in->size == sizeof(uint32_t) && in->bits_unused == 4); |
| 155 | |
| 156 | return ntohl(*(uint32_t *)in->buf) >> 4; |
| 157 | } |
| 158 | |
| 159 | uint32_t asn1bitstr_to_u24(const BIT_STRING_t *in) |
| 160 | { |
| 161 | OSMO_ASSERT(in && in->size == 3); |
| 162 | |
| 163 | return ntohl(*(uint32_t *)in->buf) >> 8; |
| 164 | } |