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authorJouni Malinen <j@w1.fi>2008-02-28 01:34:43 (GMT)
committerJouni Malinen <jm@jm.kir.nu>2008-02-28 01:34:43 (GMT)
commit6fc6879bd55a394f807cbbe927df736c190cb8ab (patch)
treecdf50da0c58f21510a808d53502a060d911ff243 /src/eap_peer/eap_fast_pac.c
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Re-initialize hostapd/wpa_supplicant git repository based on 0.6.3 release
Diffstat (limited to 'src/eap_peer/eap_fast_pac.c')
-rw-r--r--src/eap_peer/eap_fast_pac.c916
1 files changed, 916 insertions, 0 deletions
diff --git a/src/eap_peer/eap_fast_pac.c b/src/eap_peer/eap_fast_pac.c
new file mode 100644
index 0000000..1583f49
--- /dev/null
+++ b/src/eap_peer/eap_fast_pac.c
@@ -0,0 +1,916 @@
+/*
+ * EAP peer method: EAP-FAST PAC file processing
+ * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "eap_config.h"
+#include "eap_i.h"
+#include "eap_fast_pac.h"
+
+/* TODO: encrypt PAC-Key in the PAC file */
+
+
+/* Text data format */
+static const char *pac_file_hdr =
+ "wpa_supplicant EAP-FAST PAC file - version 1";
+
+/*
+ * Binary data format
+ * 4-octet magic value: 6A E4 92 0C
+ * 2-octet version (big endian)
+ * <version specific data>
+ *
+ * version=0:
+ * Sequence of PAC entries:
+ * 2-octet PAC-Type (big endian)
+ * 32-octet PAC-Key
+ * 2-octet PAC-Opaque length (big endian)
+ * <variable len> PAC-Opaque data (length bytes)
+ * 2-octet PAC-Info length (big endian)
+ * <variable len> PAC-Info data (length bytes)
+ */
+
+#define EAP_FAST_PAC_BINARY_MAGIC 0x6ae4920c
+#define EAP_FAST_PAC_BINARY_FORMAT_VERSION 0
+
+
+/**
+ * eap_fast_free_pac - Free PAC data
+ * @pac: Pointer to the PAC entry
+ *
+ * Note that the PAC entry must not be in a list since this function does not
+ * remove the list links.
+ */
+void eap_fast_free_pac(struct eap_fast_pac *pac)
+{
+ os_free(pac->pac_opaque);
+ os_free(pac->pac_info);
+ os_free(pac->a_id);
+ os_free(pac->i_id);
+ os_free(pac->a_id_info);
+ os_free(pac);
+}
+
+
+/**
+ * eap_fast_get_pac - Get a PAC entry based on A-ID
+ * @pac_root: Pointer to root of the PAC list
+ * @a_id: A-ID to search for
+ * @a_id_len: Length of A-ID
+ * @pac_type: PAC-Type to search for
+ * Returns: Pointer to the PAC entry, or %NULL if A-ID not found
+ */
+struct eap_fast_pac * eap_fast_get_pac(struct eap_fast_pac *pac_root,
+ const u8 *a_id, size_t a_id_len,
+ u16 pac_type)
+{
+ struct eap_fast_pac *pac = pac_root;
+
+ while (pac) {
+ if (pac->pac_type == pac_type && pac->a_id_len == a_id_len &&
+ os_memcmp(pac->a_id, a_id, a_id_len) == 0) {
+ return pac;
+ }
+ pac = pac->next;
+ }
+ return NULL;
+}
+
+
+static void eap_fast_remove_pac(struct eap_fast_pac **pac_root,
+ struct eap_fast_pac **pac_current,
+ const u8 *a_id, size_t a_id_len, u16 pac_type)
+{
+ struct eap_fast_pac *pac, *prev;
+
+ pac = *pac_root;
+ prev = NULL;
+
+ while (pac) {
+ if (pac->pac_type == pac_type && pac->a_id_len == a_id_len &&
+ os_memcmp(pac->a_id, a_id, a_id_len) == 0) {
+ if (prev == NULL)
+ *pac_root = pac->next;
+ else
+ prev->next = pac->next;
+ if (*pac_current == pac)
+ *pac_current = NULL;
+ eap_fast_free_pac(pac);
+ break;
+ }
+ prev = pac;
+ pac = pac->next;
+ }
+}
+
+
+static int eap_fast_copy_buf(u8 **dst, size_t *dst_len,
+ const u8 *src, size_t src_len)
+{
+ if (src) {
+ *dst = os_malloc(src_len);
+ if (*dst == NULL)
+ return -1;
+ os_memcpy(*dst, src, src_len);
+ *dst_len = src_len;
+ }
+ return 0;
+}
+
+
+/**
+ * eap_fast_add_pac - Add a copy of a PAC entry to a list
+ * @pac_root: Pointer to PAC list root pointer
+ * @pac_current: Pointer to the current PAC pointer
+ * @entry: New entry to clone and add to the list
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function makes a clone of the given PAC entry and adds this copied
+ * entry to the list (pac_root). If an old entry for the same A-ID is found,
+ * it will be removed from the PAC list and in this case, pac_current entry
+ * is set to %NULL if it was the removed entry.
+ */
+int eap_fast_add_pac(struct eap_fast_pac **pac_root,
+ struct eap_fast_pac **pac_current,
+ struct eap_fast_pac *entry)
+{
+ struct eap_fast_pac *pac;
+
+ if (entry == NULL || entry->a_id == NULL)
+ return -1;
+
+ /* Remove a possible old entry for the matching A-ID. */
+ eap_fast_remove_pac(pac_root, pac_current,
+ entry->a_id, entry->a_id_len, entry->pac_type);
+
+ /* Allocate a new entry and add it to the list of PACs. */
+ pac = os_zalloc(sizeof(*pac));
+ if (pac == NULL)
+ return -1;
+
+ pac->pac_type = entry->pac_type;
+ os_memcpy(pac->pac_key, entry->pac_key, EAP_FAST_PAC_KEY_LEN);
+ if (eap_fast_copy_buf(&pac->pac_opaque, &pac->pac_opaque_len,
+ entry->pac_opaque, entry->pac_opaque_len) < 0 ||
+ eap_fast_copy_buf(&pac->pac_info, &pac->pac_info_len,
+ entry->pac_info, entry->pac_info_len) < 0 ||
+ eap_fast_copy_buf(&pac->a_id, &pac->a_id_len,
+ entry->a_id, entry->a_id_len) < 0 ||
+ eap_fast_copy_buf(&pac->i_id, &pac->i_id_len,
+ entry->i_id, entry->i_id_len) < 0 ||
+ eap_fast_copy_buf(&pac->a_id_info, &pac->a_id_info_len,
+ entry->a_id_info, entry->a_id_info_len) < 0) {
+ eap_fast_free_pac(pac);
+ return -1;
+ }
+
+ pac->next = *pac_root;
+ *pac_root = pac;
+
+ return 0;
+}
+
+
+struct eap_fast_read_ctx {
+ FILE *f;
+ const char *pos;
+ const char *end;
+ int line;
+ char *buf;
+ size_t buf_len;
+};
+
+static int eap_fast_read_line(struct eap_fast_read_ctx *rc, char **value)
+{
+ char *pos;
+
+ rc->line++;
+ if (rc->f) {
+ if (fgets(rc->buf, rc->buf_len, rc->f) == NULL)
+ return -1;
+ } else {
+ const char *l_end;
+ size_t len;
+ if (rc->pos >= rc->end)
+ return -1;
+ l_end = rc->pos;
+ while (l_end < rc->end && *l_end != '\n')
+ l_end++;
+ len = l_end - rc->pos;
+ if (len >= rc->buf_len)
+ len = rc->buf_len - 1;
+ os_memcpy(rc->buf, rc->pos, len);
+ rc->buf[len] = '\0';
+ rc->pos = l_end + 1;
+ }
+
+ rc->buf[rc->buf_len - 1] = '\0';
+ pos = rc->buf;
+ while (*pos != '\0') {
+ if (*pos == '\n' || *pos == '\r') {
+ *pos = '\0';
+ break;
+ }
+ pos++;
+ }
+
+ pos = os_strchr(rc->buf, '=');
+ if (pos)
+ *pos++ = '\0';
+ *value = pos;
+
+ return 0;
+}
+
+
+static u8 * eap_fast_parse_hex(const char *value, size_t *len)
+{
+ int hlen;
+ u8 *buf;
+
+ if (value == NULL)
+ return NULL;
+ hlen = os_strlen(value);
+ if (hlen & 1)
+ return NULL;
+ *len = hlen / 2;
+ buf = os_malloc(*len);
+ if (buf == NULL)
+ return NULL;
+ if (hexstr2bin(value, buf, *len)) {
+ os_free(buf);
+ return NULL;
+ }
+ return buf;
+}
+
+
+static int eap_fast_init_pac_data(struct eap_sm *sm, const char *pac_file,
+ struct eap_fast_read_ctx *rc)
+{
+ os_memset(rc, 0, sizeof(*rc));
+
+ rc->buf_len = 2048;
+ rc->buf = os_malloc(rc->buf_len);
+ if (rc->buf == NULL)
+ return -1;
+
+ if (os_strncmp(pac_file, "blob://", 7) == 0) {
+ const struct wpa_config_blob *blob;
+ blob = eap_get_config_blob(sm, pac_file + 7);
+ if (blob == NULL) {
+ wpa_printf(MSG_INFO, "EAP-FAST: No PAC blob '%s' - "
+ "assume no PAC entries have been "
+ "provisioned", pac_file + 7);
+ os_free(rc->buf);
+ return -1;
+ }
+ rc->pos = (char *) blob->data;
+ rc->end = (char *) blob->data + blob->len;
+ } else {
+ rc->f = fopen(pac_file, "rb");
+ if (rc->f == NULL) {
+ wpa_printf(MSG_INFO, "EAP-FAST: No PAC file '%s' - "
+ "assume no PAC entries have been "
+ "provisioned", pac_file);
+ os_free(rc->buf);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+static void eap_fast_deinit_pac_data(struct eap_fast_read_ctx *rc)
+{
+ os_free(rc->buf);
+ if (rc->f)
+ fclose(rc->f);
+}
+
+
+static const char * eap_fast_parse_start(struct eap_fast_pac **pac)
+{
+ if (*pac)
+ return "START line without END";
+
+ *pac = os_zalloc(sizeof(struct eap_fast_pac));
+ if (*pac == NULL)
+ return "No memory for PAC entry";
+ (*pac)->pac_type = PAC_TYPE_TUNNEL_PAC;
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_end(struct eap_fast_pac **pac_root,
+ struct eap_fast_pac **pac)
+{
+ if (*pac == NULL)
+ return "END line without START";
+ if (*pac_root) {
+ struct eap_fast_pac *end = *pac_root;
+ while (end->next)
+ end = end->next;
+ end->next = *pac;
+ } else
+ *pac_root = *pac;
+
+ *pac = NULL;
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_pac_type(struct eap_fast_pac *pac,
+ char *pos)
+{
+ pac->pac_type = atoi(pos);
+ if (pac->pac_type != PAC_TYPE_TUNNEL_PAC &&
+ pac->pac_type != PAC_TYPE_USER_AUTHORIZATION &&
+ pac->pac_type != PAC_TYPE_MACHINE_AUTHENTICATION)
+ return "Unrecognized PAC-Type";
+
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_pac_key(struct eap_fast_pac *pac, char *pos)
+{
+ u8 *key;
+ size_t key_len;
+
+ key = eap_fast_parse_hex(pos, &key_len);
+ if (key == NULL || key_len != EAP_FAST_PAC_KEY_LEN) {
+ os_free(key);
+ return "Invalid PAC-Key";
+ }
+
+ os_memcpy(pac->pac_key, key, EAP_FAST_PAC_KEY_LEN);
+ os_free(key);
+
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_pac_opaque(struct eap_fast_pac *pac,
+ char *pos)
+{
+ os_free(pac->pac_opaque);
+ pac->pac_opaque = eap_fast_parse_hex(pos, &pac->pac_opaque_len);
+ if (pac->pac_opaque == NULL)
+ return "Invalid PAC-Opaque";
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_a_id(struct eap_fast_pac *pac, char *pos)
+{
+ os_free(pac->a_id);
+ pac->a_id = eap_fast_parse_hex(pos, &pac->a_id_len);
+ if (pac->a_id == NULL)
+ return "Invalid A-ID";
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_i_id(struct eap_fast_pac *pac, char *pos)
+{
+ os_free(pac->i_id);
+ pac->i_id = eap_fast_parse_hex(pos, &pac->i_id_len);
+ if (pac->i_id == NULL)
+ return "Invalid I-ID";
+ return NULL;
+}
+
+
+static const char * eap_fast_parse_a_id_info(struct eap_fast_pac *pac,
+ char *pos)
+{
+ os_free(pac->a_id_info);
+ pac->a_id_info = eap_fast_parse_hex(pos, &pac->a_id_info_len);
+ if (pac->a_id_info == NULL)
+ return "Invalid A-ID-Info";
+ return NULL;
+}
+
+
+/**
+ * eap_fast_load_pac - Load PAC entries (text format)
+ * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
+ * @pac_root: Pointer to root of the PAC list (to be filled)
+ * @pac_file: Name of the PAC file/blob to load
+ * Returns: 0 on success, -1 on failure
+ */
+int eap_fast_load_pac(struct eap_sm *sm, struct eap_fast_pac **pac_root,
+ const char *pac_file)
+{
+ struct eap_fast_read_ctx rc;
+ struct eap_fast_pac *pac = NULL;
+ int count = 0;
+ char *pos;
+ const char *err = NULL;
+
+ if (pac_file == NULL)
+ return -1;
+
+ if (eap_fast_init_pac_data(sm, pac_file, &rc) < 0)
+ return 0;
+
+ if (eap_fast_read_line(&rc, &pos) < 0 ||
+ os_strcmp(pac_file_hdr, rc.buf) != 0)
+ err = "Unrecognized header line";
+
+ while (!err && eap_fast_read_line(&rc, &pos) == 0) {
+ if (os_strcmp(rc.buf, "START") == 0)
+ err = eap_fast_parse_start(&pac);
+ else if (os_strcmp(rc.buf, "END") == 0) {
+ err = eap_fast_parse_end(pac_root, &pac);
+ count++;
+ } else if (!pac)
+ err = "Unexpected line outside START/END block";
+ else if (os_strcmp(rc.buf, "PAC-Type") == 0)
+ err = eap_fast_parse_pac_type(pac, pos);
+ else if (os_strcmp(rc.buf, "PAC-Key") == 0)
+ err = eap_fast_parse_pac_key(pac, pos);
+ else if (os_strcmp(rc.buf, "PAC-Opaque") == 0)
+ err = eap_fast_parse_pac_opaque(pac, pos);
+ else if (os_strcmp(rc.buf, "A-ID") == 0)
+ err = eap_fast_parse_a_id(pac, pos);
+ else if (os_strcmp(rc.buf, "I-ID") == 0)
+ err = eap_fast_parse_i_id(pac, pos);
+ else if (os_strcmp(rc.buf, "A-ID-Info") == 0)
+ err = eap_fast_parse_a_id_info(pac, pos);
+ }
+
+ if (pac) {
+ err = "PAC block not terminated with END";
+ eap_fast_free_pac(pac);
+ }
+
+ eap_fast_deinit_pac_data(&rc);
+
+ if (err) {
+ wpa_printf(MSG_INFO, "EAP-FAST: %s in '%s:%d'",
+ err, pac_file, rc.line);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Read %d PAC entries from '%s'",
+ count, pac_file);
+
+ return 0;
+}
+
+
+static void eap_fast_write(char **buf, char **pos, size_t *buf_len,
+ const char *field, const u8 *data,
+ size_t len, int txt)
+{
+ size_t i, need;
+ int ret;
+
+ if (data == NULL || *buf == NULL)
+ return;
+
+ need = os_strlen(field) + len * 2 + 30;
+ if (txt)
+ need += os_strlen(field) + len + 20;
+
+ if (*pos - *buf + need > *buf_len) {
+ char *nbuf = os_realloc(*buf, *buf_len + need);
+ if (nbuf == NULL) {
+ os_free(*buf);
+ *buf = NULL;
+ return;
+ }
+ *buf = nbuf;
+ *buf_len += need;
+ }
+
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos, "%s=", field);
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return;
+ *pos += ret;
+ *pos += wpa_snprintf_hex(*pos, *buf + *buf_len - *pos, data, len);
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos, "\n");
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return;
+ *pos += ret;
+
+ if (txt) {
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos,
+ "%s-txt=", field);
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return;
+ *pos += ret;
+ for (i = 0; i < len; i++) {
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos,
+ "%c", data[i]);
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return;
+ *pos += ret;
+ }
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos, "\n");
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return;
+ *pos += ret;
+ }
+}
+
+
+static int eap_fast_write_pac(struct eap_sm *sm, const char *pac_file,
+ char *buf, size_t len)
+{
+ if (os_strncmp(pac_file, "blob://", 7) == 0) {
+ struct wpa_config_blob *blob;
+ blob = os_zalloc(sizeof(*blob));
+ if (blob == NULL)
+ return -1;
+ blob->data = (u8 *) buf;
+ blob->len = len;
+ buf = NULL;
+ blob->name = os_strdup(pac_file + 7);
+ if (blob->name == NULL) {
+ os_free(blob);
+ return -1;
+ }
+ eap_set_config_blob(sm, blob);
+ } else {
+ FILE *f;
+ f = fopen(pac_file, "wb");
+ if (f == NULL) {
+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to open PAC "
+ "file '%s' for writing", pac_file);
+ return -1;
+ }
+ fwrite(buf, 1, len, f);
+ os_free(buf);
+ fclose(f);
+ }
+
+ return 0;
+}
+
+
+static int eap_fast_add_pac_data(struct eap_fast_pac *pac, char **buf,
+ char **pos, size_t *buf_len)
+{
+ int ret;
+
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos,
+ "START\nPAC-Type=%d\n", pac->pac_type);
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return -1;
+
+ *pos += ret;
+ eap_fast_write(buf, pos, buf_len, "PAC-Key",
+ pac->pac_key, EAP_FAST_PAC_KEY_LEN, 0);
+ eap_fast_write(buf, pos, buf_len, "PAC-Opaque",
+ pac->pac_opaque, pac->pac_opaque_len, 0);
+ eap_fast_write(buf, pos, buf_len, "PAC-Info",
+ pac->pac_info, pac->pac_info_len, 0);
+ eap_fast_write(buf, pos, buf_len, "A-ID",
+ pac->a_id, pac->a_id_len, 0);
+ eap_fast_write(buf, pos, buf_len, "I-ID",
+ pac->i_id, pac->i_id_len, 1);
+ eap_fast_write(buf, pos, buf_len, "A-ID-Info",
+ pac->a_id_info, pac->a_id_info_len, 1);
+ if (*buf == NULL) {
+ wpa_printf(MSG_DEBUG, "EAP-FAST: No memory for PAC "
+ "data");
+ return -1;
+ }
+ ret = os_snprintf(*pos, *buf + *buf_len - *pos, "END\n");
+ if (ret < 0 || ret >= *buf + *buf_len - *pos)
+ return -1;
+ *pos += ret;
+
+ return 0;
+}
+
+
+/**
+ * eap_fast_save_pac - Save PAC entries (text format)
+ * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
+ * @pac_root: Root of the PAC list
+ * @pac_file: Name of the PAC file/blob
+ * Returns: 0 on success, -1 on failure
+ */
+int eap_fast_save_pac(struct eap_sm *sm, struct eap_fast_pac *pac_root,
+ const char *pac_file)
+{
+ struct eap_fast_pac *pac;
+ int ret, count = 0;
+ char *buf, *pos;
+ size_t buf_len;
+
+ if (pac_file == NULL)
+ return -1;
+
+ buf_len = 1024;
+ pos = buf = os_malloc(buf_len);
+ if (buf == NULL)
+ return -1;
+
+ ret = os_snprintf(pos, buf + buf_len - pos, "%s\n", pac_file_hdr);
+ if (ret < 0 || ret >= buf + buf_len - pos) {
+ os_free(buf);
+ return -1;
+ }
+ pos += ret;
+
+ pac = pac_root;
+ while (pac) {
+ if (eap_fast_add_pac_data(pac, &buf, &pos, &buf_len)) {
+ os_free(buf);
+ return -1;
+ }
+ count++;
+ pac = pac->next;
+ }
+
+ if (eap_fast_write_pac(sm, pac_file, buf, pos - buf)) {
+ os_free(buf);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Wrote %d PAC entries into '%s'",
+ count, pac_file);
+
+ return 0;
+}
+
+
+/**
+ * eap_fast_pac_list_truncate - Truncate a PAC list to the given length
+ * @pac_root: Root of the PAC list
+ * @max_len: Maximum length of the list (>= 1)
+ * Returns: Number of PAC entries removed
+ */
+size_t eap_fast_pac_list_truncate(struct eap_fast_pac *pac_root,
+ size_t max_len)
+{
+ struct eap_fast_pac *pac, *prev;
+ size_t count;
+
+ pac = pac_root;
+ prev = NULL;
+ count = 0;
+
+ while (pac) {
+ count++;
+ if (count > max_len)
+ break;
+ prev = pac;
+ pac = pac->next;
+ }
+
+ if (count <= max_len || prev == NULL)
+ return 0;
+
+ count = 0;
+ prev->next = NULL;
+
+ while (pac) {
+ prev = pac;
+ pac = pac->next;
+ eap_fast_free_pac(prev);
+ count++;
+ }
+
+ return count;
+}
+
+
+static void eap_fast_pac_get_a_id(struct eap_fast_pac *pac)
+{
+ u8 *pos, *end;
+ u16 type, len;
+
+ pos = pac->pac_info;
+ end = pos + pac->pac_info_len;
+
+ while (pos + 4 < end) {
+ type = WPA_GET_BE16(pos);
+ pos += 2;
+ len = WPA_GET_BE16(pos);
+ pos += 2;
+ if (pos + len > end)
+ break;
+
+ if (type == PAC_TYPE_A_ID) {
+ os_free(pac->a_id);
+ pac->a_id = os_malloc(len);
+ if (pac->a_id == NULL)
+ break;
+ os_memcpy(pac->a_id, pos, len);
+ pac->a_id_len = len;
+ }
+
+ if (type == PAC_TYPE_A_ID_INFO) {
+ os_free(pac->a_id_info);
+ pac->a_id_info = os_malloc(len);
+ if (pac->a_id_info == NULL)
+ break;
+ os_memcpy(pac->a_id_info, pos, len);
+ pac->a_id_info_len = len;
+ }
+
+ pos += len;
+ }
+}
+
+
+/**
+ * eap_fast_load_pac_bin - Load PAC entries (binary format)
+ * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
+ * @pac_root: Pointer to root of the PAC list (to be filled)
+ * @pac_file: Name of the PAC file/blob to load
+ * Returns: 0 on success, -1 on failure
+ */
+int eap_fast_load_pac_bin(struct eap_sm *sm, struct eap_fast_pac **pac_root,
+ const char *pac_file)
+{
+ const struct wpa_config_blob *blob = NULL;
+ u8 *buf, *end, *pos;
+ size_t len, count = 0;
+ struct eap_fast_pac *pac, *prev;
+
+ *pac_root = NULL;
+
+ if (pac_file == NULL)
+ return -1;
+
+ if (os_strncmp(pac_file, "blob://", 7) == 0) {
+ blob = eap_get_config_blob(sm, pac_file + 7);
+ if (blob == NULL) {
+ wpa_printf(MSG_INFO, "EAP-FAST: No PAC blob '%s' - "
+ "assume no PAC entries have been "
+ "provisioned", pac_file + 7);
+ return 0;
+ }
+ buf = blob->data;
+ len = blob->len;
+ } else {
+ buf = (u8 *) os_readfile(pac_file, &len);
+ if (buf == NULL) {
+ wpa_printf(MSG_INFO, "EAP-FAST: No PAC file '%s' - "
+ "assume no PAC entries have been "
+ "provisioned", pac_file);
+ return 0;
+ }
+ }
+
+ if (len == 0) {
+ if (blob == NULL)
+ os_free(buf);
+ return 0;
+ }
+
+ if (len < 6 || WPA_GET_BE32(buf) != EAP_FAST_PAC_BINARY_MAGIC ||
+ WPA_GET_BE16(buf + 4) != EAP_FAST_PAC_BINARY_FORMAT_VERSION) {
+ wpa_printf(MSG_INFO, "EAP-FAST: Invalid PAC file '%s' (bin)",
+ pac_file);
+ if (blob == NULL)
+ os_free(buf);
+ return -1;
+ }
+
+ pac = prev = NULL;
+ pos = buf + 6;
+ end = buf + len;
+ while (pos < end) {
+ if (end - pos < 2 + 32 + 2 + 2)
+ goto parse_fail;
+
+ pac = os_zalloc(sizeof(*pac));
+ if (pac == NULL)
+ goto parse_fail;
+
+ pac->pac_type = WPA_GET_BE16(pos);
+ pos += 2;
+ os_memcpy(pac->pac_key, pos, EAP_FAST_PAC_KEY_LEN);
+ pos += EAP_FAST_PAC_KEY_LEN;
+ pac->pac_opaque_len = WPA_GET_BE16(pos);
+ pos += 2;
+ if (pos + pac->pac_opaque_len + 2 > end)
+ goto parse_fail;
+ pac->pac_opaque = os_malloc(pac->pac_opaque_len);
+ if (pac->pac_opaque == NULL)
+ goto parse_fail;
+ os_memcpy(pac->pac_opaque, pos, pac->pac_opaque_len);
+ pos += pac->pac_opaque_len;
+ pac->pac_info_len = WPA_GET_BE16(pos);
+ pos += 2;
+ if (pos + pac->pac_info_len > end)
+ goto parse_fail;
+ pac->pac_info = os_malloc(pac->pac_info_len);
+ if (pac->pac_info == NULL)
+ goto parse_fail;
+ os_memcpy(pac->pac_info, pos, pac->pac_info_len);
+ pos += pac->pac_info_len;
+ eap_fast_pac_get_a_id(pac);
+
+ count++;
+ if (prev)
+ prev->next = pac;
+ else
+ *pac_root = pac;
+ prev = pac;
+ }
+
+ if (blob == NULL)
+ os_free(buf);
+
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Read %d PAC entries from '%s' (bin)",
+ count, pac_file);
+
+ return 0;
+
+parse_fail:
+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to parse PAC file '%s' (bin)",
+ pac_file);
+ if (blob == NULL)
+ os_free(buf);
+ if (pac)
+ eap_fast_free_pac(pac);
+ return -1;
+}
+
+
+/**
+ * eap_fast_save_pac_bin - Save PAC entries (binary format)
+ * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
+ * @pac_root: Root of the PAC list
+ * @pac_file: Name of the PAC file/blob
+ * Returns: 0 on success, -1 on failure
+ */
+int eap_fast_save_pac_bin(struct eap_sm *sm, struct eap_fast_pac *pac_root,
+ const char *pac_file)
+{
+ size_t len, count = 0;
+ struct eap_fast_pac *pac;
+ u8 *buf, *pos;
+
+ len = 6;
+ pac = pac_root;
+ while (pac) {
+ if (pac->pac_opaque_len > 65535 ||
+ pac->pac_info_len > 65535)
+ return -1;
+ len += 2 + EAP_FAST_PAC_KEY_LEN + 2 + pac->pac_opaque_len +
+ 2 + pac->pac_info_len;
+ pac = pac->next;
+ }
+
+ buf = os_malloc(len);
+ if (buf == NULL)
+ return -1;
+
+ pos = buf;
+ WPA_PUT_BE32(pos, EAP_FAST_PAC_BINARY_MAGIC);
+ pos += 4;
+ WPA_PUT_BE16(pos, EAP_FAST_PAC_BINARY_FORMAT_VERSION);
+ pos += 2;
+
+ pac = pac_root;
+ while (pac) {
+ WPA_PUT_BE16(pos, pac->pac_type);
+ pos += 2;
+ os_memcpy(pos, pac->pac_key, EAP_FAST_PAC_KEY_LEN);
+ pos += EAP_FAST_PAC_KEY_LEN;
+ WPA_PUT_BE16(pos, pac->pac_opaque_len);
+ pos += 2;
+ os_memcpy(pos, pac->pac_opaque, pac->pac_opaque_len);
+ pos += pac->pac_opaque_len;
+ WPA_PUT_BE16(pos, pac->pac_info_len);
+ pos += 2;
+ os_memcpy(pos, pac->pac_info, pac->pac_info_len);
+ pos += pac->pac_info_len;
+
+ pac = pac->next;
+ count++;
+ }
+
+ if (eap_fast_write_pac(sm, pac_file, (char *) buf, len)) {
+ os_free(buf);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Wrote %d PAC entries into '%s' (bin)",
+ count, pac_file);
+
+ return 0;
+}