^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2013 Politecnico di Torino, Italy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * TORSEC group -- https://security.polito.it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Roberto Sassu <roberto.sassu@polito.it>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * File: ima_template.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Helpers to manage template descriptors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/rculist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "ima.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "ima_template_lib.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) enum header_fields { HDR_PCR, HDR_DIGEST, HDR_TEMPLATE_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) HDR_TEMPLATE_DATA, HDR__LAST };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static struct ima_template_desc builtin_templates[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {.name = IMA_TEMPLATE_IMA_NAME, .fmt = IMA_TEMPLATE_IMA_FMT},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {.name = "ima-ng", .fmt = "d-ng|n-ng"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {.name = "ima-sig", .fmt = "d-ng|n-ng|sig"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {.name = "ima-buf", .fmt = "d-ng|n-ng|buf"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {.name = "ima-modsig", .fmt = "d-ng|n-ng|sig|d-modsig|modsig"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {.name = "", .fmt = ""}, /* placeholder for a custom format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static LIST_HEAD(defined_templates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static DEFINE_SPINLOCK(template_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int template_setup_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static const struct ima_template_field supported_fields[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {.field_id = "d", .field_init = ima_eventdigest_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .field_show = ima_show_template_digest},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {.field_id = "n", .field_init = ima_eventname_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .field_show = ima_show_template_string},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {.field_id = "d-ng", .field_init = ima_eventdigest_ng_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .field_show = ima_show_template_digest_ng},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {.field_id = "n-ng", .field_init = ima_eventname_ng_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .field_show = ima_show_template_string},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {.field_id = "sig", .field_init = ima_eventsig_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .field_show = ima_show_template_sig},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {.field_id = "buf", .field_init = ima_eventbuf_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .field_show = ima_show_template_buf},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {.field_id = "d-modsig", .field_init = ima_eventdigest_modsig_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .field_show = ima_show_template_digest_ng},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {.field_id = "modsig", .field_init = ima_eventmodsig_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .field_show = ima_show_template_sig},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Used when restoring measurements carried over from a kexec. 'd' and 'n' don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * need to be accounted for since they shouldn't be defined in the same template
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * description as 'd-ng' and 'n-ng' respectively.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define MAX_TEMPLATE_NAME_LEN sizeof("d-ng|n-ng|sig|buf|d-modisg|modsig")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static struct ima_template_desc *ima_template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * ima_template_has_modsig - Check whether template has modsig-related fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * @ima_template: IMA template to check.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Tells whether the given template has fields referencing a file's appended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * signature.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) bool ima_template_has_modsig(const struct ima_template_desc *ima_template)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) for (i = 0; i < ima_template->num_fields; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!strcmp(ima_template->fields[i]->field_id, "modsig") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) !strcmp(ima_template->fields[i]->field_id, "d-modsig"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static int __init ima_template_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct ima_template_desc *template_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int template_len = strlen(str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (template_setup_done)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!ima_template)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) ima_init_template_list();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * Verify that a template with the supplied name exists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * If not, use CONFIG_IMA_DEFAULT_TEMPLATE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) template_desc = lookup_template_desc(str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (!template_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) pr_err("template %s not found, using %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) str, CONFIG_IMA_DEFAULT_TEMPLATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * Verify whether the current hash algorithm is supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * by the 'ima' template.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (template_len == 3 && strcmp(str, IMA_TEMPLATE_IMA_NAME) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ima_hash_algo != HASH_ALGO_SHA1 && ima_hash_algo != HASH_ALGO_MD5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) pr_err("template does not support hash alg\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ima_template = template_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) template_setup_done = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) __setup("ima_template=", ima_template_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int __init ima_template_fmt_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int num_templates = ARRAY_SIZE(builtin_templates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (template_setup_done)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (template_desc_init_fields(str, NULL, NULL) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) pr_err("format string '%s' not valid, using template %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) str, CONFIG_IMA_DEFAULT_TEMPLATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) builtin_templates[num_templates - 1].fmt = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ima_template = builtin_templates + num_templates - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) template_setup_done = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) __setup("ima_template_fmt=", ima_template_fmt_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct ima_template_desc *lookup_template_desc(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct ima_template_desc *template_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int found = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) list_for_each_entry_rcu(template_desc, &defined_templates, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if ((strcmp(template_desc->name, name) == 0) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) (strcmp(template_desc->fmt, name) == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return found ? template_desc : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static const struct ima_template_field *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) lookup_template_field(const char *field_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) for (i = 0; i < ARRAY_SIZE(supported_fields); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (strncmp(supported_fields[i].field_id, field_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) IMA_TEMPLATE_FIELD_ID_MAX_LEN) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return &supported_fields[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int template_fmt_size(const char *template_fmt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) int template_fmt_len = strlen(template_fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int i = 0, j = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) while (i < template_fmt_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) c = template_fmt[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (c == '|')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) j++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return j + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) int template_desc_init_fields(const char *template_fmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) const struct ima_template_field ***fields,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int *num_fields)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) const char *template_fmt_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) const struct ima_template_field *found_fields[IMA_TEMPLATE_NUM_FIELDS_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int template_num_fields;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) int i, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (num_fields && *num_fields > 0) /* already initialized? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) template_num_fields = template_fmt_size(template_fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (template_num_fields > IMA_TEMPLATE_NUM_FIELDS_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) pr_err("format string '%s' contains too many fields\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) template_fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) for (i = 0, template_fmt_ptr = template_fmt; i < template_num_fields;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) i++, template_fmt_ptr += len + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) char tmp_field_id[IMA_TEMPLATE_FIELD_ID_MAX_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) len = strchrnul(template_fmt_ptr, '|') - template_fmt_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (len == 0 || len > IMA_TEMPLATE_FIELD_ID_MAX_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) pr_err("Invalid field with length %d\n", len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) memcpy(tmp_field_id, template_fmt_ptr, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) tmp_field_id[len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) found_fields[i] = lookup_template_field(tmp_field_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (!found_fields[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) pr_err("field '%s' not found\n", tmp_field_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (fields && num_fields) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) *fields = kmalloc_array(i, sizeof(*fields), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (*fields == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) memcpy(*fields, found_fields, i * sizeof(*fields));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) *num_fields = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) void ima_init_template_list(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (!list_empty(&defined_templates))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) spin_lock(&template_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) for (i = 0; i < ARRAY_SIZE(builtin_templates); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) list_add_tail_rcu(&builtin_templates[i].list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) &defined_templates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) spin_unlock(&template_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct ima_template_desc *ima_template_desc_current(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (!ima_template) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ima_init_template_list();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) ima_template =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) lookup_template_desc(CONFIG_IMA_DEFAULT_TEMPLATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return ima_template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int __init ima_init_template(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct ima_template_desc *template = ima_template_desc_current();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) result = template_desc_init_fields(template->fmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) &(template->fields),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) &(template->num_fields));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (result < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) pr_err("template %s init failed, result: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) (strlen(template->name) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) template->name : template->fmt), result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static struct ima_template_desc *restore_template_fmt(char *template_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct ima_template_desc *template_desc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) ret = template_desc_init_fields(template_name, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) pr_err("attempting to initialize the template \"%s\" failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) template_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) template_desc = kzalloc(sizeof(*template_desc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (!template_desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) template_desc->name = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) template_desc->fmt = kstrdup(template_name, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (!template_desc->fmt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) spin_lock(&template_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) list_add_tail_rcu(&template_desc->list, &defined_templates);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) spin_unlock(&template_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return template_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static int ima_restore_template_data(struct ima_template_desc *template_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) void *template_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) int template_data_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct ima_template_entry **entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct tpm_digest *digests;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) *entry = kzalloc(struct_size(*entry, template_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) template_desc->num_fields), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (!*entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) digests = kcalloc(NR_BANKS(ima_tpm_chip) + ima_extra_slots,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) sizeof(*digests), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (!digests) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) kfree(*entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) (*entry)->digests = digests;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) ret = ima_parse_buf(template_data, template_data + template_data_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) NULL, template_desc->num_fields,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) (*entry)->template_data, NULL, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) ENFORCE_FIELDS | ENFORCE_BUFEND, "template data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) kfree((*entry)->digests);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) kfree(*entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) (*entry)->template_desc = template_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) for (i = 0; i < template_desc->num_fields; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct ima_field_data *field_data = &(*entry)->template_data[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) u8 *data = field_data->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) (*entry)->template_data[i].data =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) kzalloc(field_data->len + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (!(*entry)->template_data[i].data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) memcpy((*entry)->template_data[i].data, data, field_data->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) (*entry)->template_data_len += sizeof(field_data->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) (*entry)->template_data_len += field_data->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) ima_free_template_entry(*entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) *entry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /* Restore the serialized binary measurement list without extending PCRs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) int ima_restore_measurement_list(loff_t size, void *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) char template_name[MAX_TEMPLATE_NAME_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) unsigned char zero[TPM_DIGEST_SIZE] = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct ima_kexec_hdr *khdr = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct ima_field_data hdr[HDR__LAST] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) [HDR_PCR] = {.len = sizeof(u32)},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) [HDR_DIGEST] = {.len = TPM_DIGEST_SIZE},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) void *bufp = buf + sizeof(*khdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) void *bufendp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) struct ima_template_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct ima_template_desc *template_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) DECLARE_BITMAP(hdr_mask, HDR__LAST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) unsigned long count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (!buf || size < sizeof(*khdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (ima_canonical_fmt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) khdr->version = le16_to_cpu(khdr->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) khdr->count = le64_to_cpu(khdr->count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) khdr->buffer_size = le64_to_cpu(khdr->buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (khdr->version != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) pr_err("attempting to restore a incompatible measurement list");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (khdr->count > ULONG_MAX - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) pr_err("attempting to restore too many measurements");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) bitmap_zero(hdr_mask, HDR__LAST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) bitmap_set(hdr_mask, HDR_PCR, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) bitmap_set(hdr_mask, HDR_DIGEST, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * ima kexec buffer prefix: version, buffer size, count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * v1 format: pcr, digest, template-name-len, template-name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * template-data-size, template-data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) bufendp = buf + khdr->buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) while ((bufp < bufendp) && (count++ < khdr->count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int enforce_mask = ENFORCE_FIELDS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) enforce_mask |= (count == khdr->count) ? ENFORCE_BUFEND : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ret = ima_parse_buf(bufp, bufendp, &bufp, HDR__LAST, hdr, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) hdr_mask, enforce_mask, "entry header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (hdr[HDR_TEMPLATE_NAME].len >= MAX_TEMPLATE_NAME_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) pr_err("attempting to restore a template name that is too long\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) /* template name is not null terminated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) memcpy(template_name, hdr[HDR_TEMPLATE_NAME].data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) hdr[HDR_TEMPLATE_NAME].len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) template_name[hdr[HDR_TEMPLATE_NAME].len] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (strcmp(template_name, "ima") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) pr_err("attempting to restore an unsupported template \"%s\" failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) template_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) template_desc = lookup_template_desc(template_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (!template_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) template_desc = restore_template_fmt(template_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (!template_desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) * Only the running system's template format is initialized
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * on boot. As needed, initialize the other template formats.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) ret = template_desc_init_fields(template_desc->fmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) &(template_desc->fields),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) &(template_desc->num_fields));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) pr_err("attempting to restore the template fmt \"%s\" failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) template_desc->fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) ret = ima_restore_template_data(template_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) hdr[HDR_TEMPLATE_DATA].data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) hdr[HDR_TEMPLATE_DATA].len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) &entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (memcmp(hdr[HDR_DIGEST].data, zero, sizeof(zero))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ret = ima_calc_field_array_hash(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) &entry->template_data[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) pr_err("cannot calculate template digest\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) entry->pcr = !ima_canonical_fmt ? *(u32 *)(hdr[HDR_PCR].data) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) le32_to_cpu(*(u32 *)(hdr[HDR_PCR].data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) ret = ima_restore_measurement_entry(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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