Harald Welte | 77847ad | 2015-10-06 22:07:04 +0200 | [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 | */ |
Harald Welte | 30afef3 | 2015-08-30 12:28:29 +0200 | [diff] [blame] | 20 | |
| 21 | #include <string.h> |
| 22 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 23 | #include <osmocom/core/utils.h> |
Harald Welte | 30afef3 | 2015-08-30 12:28:29 +0200 | [diff] [blame] | 24 | |
| 25 | #include "asn1helpers.h" |
| 26 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 27 | void asn1_u32_to_bitstring(BIT_STRING_t *bitstr, uint32_t *in) |
| 28 | { |
| 29 | bitstr->buf = (uint8_t *) in; |
| 30 | bitstr->size = sizeof(uint32_t); |
| 31 | bitstr->bits_unused = 0; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | int asn1_strncpy(char *out, const OCTET_STRING_t *in, size_t n) |
Harald Welte | 30afef3 | 2015-08-30 12:28:29 +0200 | [diff] [blame] | 36 | { |
| 37 | size_t cpylen = n; |
| 38 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 39 | if (in->size < cpylen) |
| 40 | cpylen = in->size; |
Harald Welte | 30afef3 | 2015-08-30 12:28:29 +0200 | [diff] [blame] | 41 | |
| 42 | strncpy(out, (char *)in->buf, cpylen); |
| 43 | out[n-1] = '\0'; |
| 44 | |
| 45 | return cpylen; |
| 46 | } |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 47 | |
| 48 | uint16_t asn1str_to_u16(const OCTET_STRING_t *in) |
| 49 | { |
| 50 | OSMO_ASSERT(in && in->size >= sizeof(uint16_t)); |
| 51 | return *(uint16_t *)in->buf; |
| 52 | } |
| 53 | |
| 54 | uint8_t asn1str_to_u8(const OCTET_STRING_t *in) |
| 55 | { |
| 56 | OSMO_ASSERT(in && in->size >= sizeof(uint8_t)); |
| 57 | return *(uint8_t *)in->buf; |
| 58 | } |
| 59 | |
| 60 | uint32_t asn1bitstr_to_u32(const BIT_STRING_t *in) |
| 61 | { |
Harald Welte | 4dd16b9 | 2015-10-06 22:08:10 +0200 | [diff] [blame^] | 62 | uint32_t ret = 0; |
| 63 | int i; |
| 64 | |
| 65 | for (i = 0; i < 4; i++) { |
| 66 | if (in->size < i) |
| 67 | break; |
| 68 | ret <<= 8; |
| 69 | ret |= in->buf[i]; |
| 70 | } |
| 71 | return ret; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 72 | } |