| Peter Huewe | 9f7cc08 | 2019-05-02 18:16:28 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
| Philip Tricca | e394cff | 2018-04-18 08:36:06 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2018, Intel Corporation |
| 4 | * All rights reserved. |
| Philip Tricca | e394cff | 2018-04-18 08:36:06 -0700 | [diff] [blame] | 5 | */ |
| Alon Bar-Lev | 38fcb66 | 2019-05-31 18:55:38 +0300 | [diff] [blame] | 6 | #ifdef HAVE_CONFIG_H |
| 7 | #include <config.h> |
| 8 | #endif |
| 9 | |
| Philip Tricca | e394cff | 2018-04-18 08:36:06 -0700 | [diff] [blame] | 10 | #include <inttypes.h> |
| 11 | #include <stdbool.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | #include "tss2_tpm2_types.h" |
| 15 | |
| 16 | #include "util/key-value-parse.h" |
| 17 | #define LOGMODULE tcti |
| 18 | #include "util/log.h" |
| 19 | |
| 20 | /* |
| 21 | * Parse the provided string containing a key / value pair separated by the |
| 22 | * '=' character. |
| 23 | * NOTE: The 'kv_str' parameter is not 'const' and this function will modify |
| 24 | * it as part of the parsing process. The key_value structure will be updated |
| 25 | * with references pointing to the appropriate location in the key_value_str |
| 26 | * parameter. |
| 27 | */ |
| 28 | bool |
| 29 | parse_key_value (char *key_value_str, |
| 30 | key_value_t *key_value) |
| 31 | { |
| 32 | const char *delim = "="; |
| 33 | char *tok, *state; |
| 34 | |
| 35 | LOG_TRACE ("key_value_str: \"%s\" and key_value_t: 0x%" PRIxPTR, |
| 36 | key_value_str, (uintptr_t)key_value); |
| 37 | if (key_value_str == NULL || key_value == NULL) { |
| 38 | LOG_WARNING ("received a NULL parameter, all are required"); |
| 39 | return false; |
| 40 | } |
| 41 | tok = strtok_r (key_value_str, delim, &state); |
| 42 | if (tok == NULL) { |
| 43 | LOG_WARNING ("key / value string is null."); |
| 44 | return false; |
| 45 | } |
| 46 | key_value->key = tok; |
| 47 | |
| 48 | tok = strtok_r (NULL, delim, &state); |
| 49 | if (tok == NULL) { |
| 50 | LOG_WARNING ("key / value string is invalid"); |
| 51 | return false; |
| 52 | } |
| 53 | key_value->value = tok; |
| 54 | |
| 55 | return true; |
| 56 | } |
| 57 | /* |
| 58 | * This function parses the provided configuration string extracting the |
| 59 | * key/value pairs. Each key/value pair extracted is stored in a key_value_t |
| 60 | * structure and then passed to the provided callback function for processing. |
| 61 | * |
| 62 | * NOTE: The 'kv_str' parameter is not 'const' and this function will modify |
| 63 | * it as part of the parsing process. |
| 64 | */ |
| 65 | TSS2_RC |
| 66 | parse_key_value_string (char *kv_str, |
| 67 | KeyValueFunc callback, |
| 68 | void *user_data) |
| 69 | { |
| 70 | const char *delim = ","; |
| 71 | char *state, *tok; |
| 72 | key_value_t key_value = KEY_VALUE_INIT; |
| 73 | TSS2_RC rc = TSS2_RC_SUCCESS; |
| 74 | |
| 75 | LOG_TRACE ("kv_str: \"%s\", callback: 0x%" PRIxPTR ", user_data: 0x%" |
| 76 | PRIxPTR, kv_str, (uintptr_t)callback, |
| 77 | (uintptr_t)user_data); |
| 78 | if (kv_str == NULL || callback == NULL || user_data == NULL) { |
| 79 | LOG_WARNING ("all parameters are required"); |
| 80 | return TSS2_TCTI_RC_BAD_VALUE; |
| 81 | } |
| 82 | for (tok = strtok_r (kv_str, delim, &state); |
| 83 | tok; |
| 84 | tok = strtok_r (NULL, delim, &state)) { |
| 85 | LOG_DEBUG ("parsing key/value: %s", tok); |
| 86 | if (parse_key_value (tok, &key_value) != true) { |
| 87 | return TSS2_TCTI_RC_BAD_VALUE; |
| 88 | } |
| 89 | rc = callback (&key_value, user_data); |
| 90 | if (rc != TSS2_RC_SUCCESS) { |
| 91 | goto out; |
| 92 | } |
| 93 | } |
| 94 | out: |
| 95 | return rc; |
| 96 | } |