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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/tls/tlsv1_cred.c
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Re-initialize hostapd/wpa_supplicant git repository based on 0.6.3 release
Diffstat (limited to 'src/tls/tlsv1_cred.c')
-rw-r--r--src/tls/tlsv1_cred.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/src/tls/tlsv1_cred.c b/src/tls/tlsv1_cred.c
new file mode 100644
index 0000000..d556467
--- /dev/null
+++ b/src/tls/tlsv1_cred.c
@@ -0,0 +1,422 @@
+/*
+ * TLSv1 credentials
+ * Copyright (c) 2006-2007, 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 "base64.h"
+#include "crypto.h"
+#include "x509v3.h"
+#include "tlsv1_cred.h"
+
+
+struct tlsv1_credentials * tlsv1_cred_alloc(void)
+{
+ struct tlsv1_credentials *cred;
+ cred = os_zalloc(sizeof(*cred));
+ return cred;
+}
+
+
+void tlsv1_cred_free(struct tlsv1_credentials *cred)
+{
+ if (cred == NULL)
+ return;
+
+ x509_certificate_chain_free(cred->trusted_certs);
+ x509_certificate_chain_free(cred->cert);
+ crypto_private_key_free(cred->key);
+ os_free(cred->dh_p);
+ os_free(cred->dh_g);
+ os_free(cred);
+}
+
+
+static int tlsv1_add_cert_der(struct x509_certificate **chain,
+ const u8 *buf, size_t len)
+{
+ struct x509_certificate *cert;
+ char name[128];
+
+ cert = x509_certificate_parse(buf, len);
+ if (cert == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: %s - failed to parse certificate",
+ __func__);
+ return -1;
+ }
+
+ cert->next = *chain;
+ *chain = cert;
+
+ x509_name_string(&cert->subject, name, sizeof(name));
+ wpa_printf(MSG_DEBUG, "TLSv1: Added certificate: %s", name);
+
+ return 0;
+}
+
+
+static const char *pem_cert_begin = "-----BEGIN CERTIFICATE-----";
+static const char *pem_cert_end = "-----END CERTIFICATE-----";
+
+
+static const u8 * search_tag(const char *tag, const u8 *buf, size_t len)
+{
+ size_t i, plen;
+
+ plen = os_strlen(tag);
+ if (len < plen)
+ return NULL;
+
+ for (i = 0; i < len - plen; i++) {
+ if (os_memcmp(buf + i, tag, plen) == 0)
+ return buf + i;
+ }
+
+ return NULL;
+}
+
+
+static int tlsv1_add_cert(struct x509_certificate **chain,
+ const u8 *buf, size_t len)
+{
+ const u8 *pos, *end;
+ unsigned char *der;
+ size_t der_len;
+
+ pos = search_tag(pem_cert_begin, buf, len);
+ if (!pos) {
+ wpa_printf(MSG_DEBUG, "TLSv1: No PEM certificate tag found - "
+ "assume DER format");
+ return tlsv1_add_cert_der(chain, buf, len);
+ }
+
+ wpa_printf(MSG_DEBUG, "TLSv1: Converting PEM format certificate into "
+ "DER format");
+
+ while (pos) {
+ pos += os_strlen(pem_cert_begin);
+ end = search_tag(pem_cert_end, pos, buf + len - pos);
+ if (end == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Could not find PEM "
+ "certificate end tag (%s)", pem_cert_end);
+ return -1;
+ }
+
+ der = base64_decode(pos, end - pos, &der_len);
+ if (der == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Could not decode PEM "
+ "certificate");
+ return -1;
+ }
+
+ if (tlsv1_add_cert_der(chain, der, der_len) < 0) {
+ wpa_printf(MSG_INFO, "TLSv1: Failed to parse PEM "
+ "certificate after DER conversion");
+ os_free(der);
+ return -1;
+ }
+
+ os_free(der);
+
+ end += os_strlen(pem_cert_end);
+ pos = search_tag(pem_cert_begin, end, buf + len - end);
+ }
+
+ return 0;
+}
+
+
+static int tlsv1_set_cert_chain(struct x509_certificate **chain,
+ const char *cert, const u8 *cert_blob,
+ size_t cert_blob_len)
+{
+ if (cert_blob)
+ return tlsv1_add_cert(chain, cert_blob, cert_blob_len);
+
+ if (cert) {
+ u8 *buf;
+ size_t len;
+ int ret;
+
+ buf = (u8 *) os_readfile(cert, &len);
+ if (buf == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Failed to read '%s'",
+ cert);
+ return -1;
+ }
+
+ ret = tlsv1_add_cert(chain, buf, len);
+ os_free(buf);
+ return ret;
+ }
+
+ return 0;
+}
+
+
+/**
+ * tlsv1_set_ca_cert - Set trusted CA certificate(s)
+ * @cred: TLSv1 credentials from tlsv1_cred_alloc()
+ * @cert: File or reference name for X.509 certificate in PEM or DER format
+ * @cert_blob: cert as inlined data or %NULL if not used
+ * @cert_blob_len: ca_cert_blob length
+ * @path: Path to CA certificates (not yet supported)
+ * Returns: 0 on success, -1 on failure
+ */
+int tlsv1_set_ca_cert(struct tlsv1_credentials *cred, const char *cert,
+ const u8 *cert_blob, size_t cert_blob_len,
+ const char *path)
+{
+ if (tlsv1_set_cert_chain(&cred->trusted_certs, cert,
+ cert_blob, cert_blob_len) < 0)
+ return -1;
+
+ if (path) {
+ /* TODO: add support for reading number of certificate files */
+ wpa_printf(MSG_INFO, "TLSv1: Use of CA certificate directory "
+ "not yet supported");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/**
+ * tlsv1_set_cert - Set certificate
+ * @cred: TLSv1 credentials from tlsv1_cred_alloc()
+ * @cert: File or reference name for X.509 certificate in PEM or DER format
+ * @cert_blob: cert as inlined data or %NULL if not used
+ * @cert_blob_len: cert_blob length
+ * Returns: 0 on success, -1 on failure
+ */
+int tlsv1_set_cert(struct tlsv1_credentials *cred, const char *cert,
+ const u8 *cert_blob, size_t cert_blob_len)
+{
+ return tlsv1_set_cert_chain(&cred->cert, cert,
+ cert_blob, cert_blob_len);
+}
+
+
+static int tlsv1_set_key(struct tlsv1_credentials *cred,
+ const u8 *key, size_t len)
+{
+ cred->key = crypto_private_key_import(key, len);
+ if (cred->key == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Failed to parse private key");
+ return -1;
+ }
+ return 0;
+}
+
+
+/**
+ * tlsv1_set_private_key - Set private key
+ * @cred: TLSv1 credentials from tlsv1_cred_alloc()
+ * @private_key: File or reference name for the key in PEM or DER format
+ * @private_key_passwd: Passphrase for decrypted private key, %NULL if no
+ * passphrase is used.
+ * @private_key_blob: private_key as inlined data or %NULL if not used
+ * @private_key_blob_len: private_key_blob length
+ * Returns: 0 on success, -1 on failure
+ */
+int tlsv1_set_private_key(struct tlsv1_credentials *cred,
+ const char *private_key,
+ const char *private_key_passwd,
+ const u8 *private_key_blob,
+ size_t private_key_blob_len)
+{
+ crypto_private_key_free(cred->key);
+ cred->key = NULL;
+
+ if (private_key_blob)
+ return tlsv1_set_key(cred, private_key_blob,
+ private_key_blob_len);
+
+ if (private_key) {
+ u8 *buf;
+ size_t len;
+ int ret;
+
+ buf = (u8 *) os_readfile(private_key, &len);
+ if (buf == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Failed to read '%s'",
+ private_key);
+ return -1;
+ }
+
+ ret = tlsv1_set_key(cred, buf, len);
+ os_free(buf);
+ return ret;
+ }
+
+ return 0;
+}
+
+
+static int tlsv1_set_dhparams_der(struct tlsv1_credentials *cred,
+ const u8 *dh, size_t len)
+{
+ struct asn1_hdr hdr;
+ const u8 *pos, *end;
+
+ pos = dh;
+ end = dh + len;
+
+ /*
+ * DHParameter ::= SEQUENCE {
+ * prime INTEGER, -- p
+ * base INTEGER, -- g
+ * privateValueLength INTEGER OPTIONAL }
+ */
+
+ /* DHParamer ::= SEQUENCE */
+ if (asn1_get_next(pos, len, &hdr) < 0 ||
+ hdr.class != ASN1_CLASS_UNIVERSAL ||
+ hdr.tag != ASN1_TAG_SEQUENCE) {
+ wpa_printf(MSG_DEBUG, "DH: DH parameters did not start with a "
+ "valid SEQUENCE - found class %d tag 0x%x",
+ hdr.class, hdr.tag);
+ return -1;
+ }
+ pos = hdr.payload;
+
+ /* prime INTEGER */
+ if (asn1_get_next(pos, end - pos, &hdr) < 0)
+ return -1;
+
+ if (hdr.class != ASN1_CLASS_UNIVERSAL ||
+ hdr.tag != ASN1_TAG_INTEGER) {
+ wpa_printf(MSG_DEBUG, "DH: No INTEGER tag found for p; "
+ "class=%d tag=0x%x", hdr.class, hdr.tag);
+ return -1;
+ }
+
+ wpa_hexdump(MSG_MSGDUMP, "DH: prime (p)", hdr.payload, hdr.length);
+ if (hdr.length == 0)
+ return -1;
+ os_free(cred->dh_p);
+ cred->dh_p = os_malloc(hdr.length);
+ if (cred->dh_p == NULL)
+ return -1;
+ os_memcpy(cred->dh_p, hdr.payload, hdr.length);
+ cred->dh_p_len = hdr.length;
+ pos = hdr.payload + hdr.length;
+
+ /* base INTEGER */
+ if (asn1_get_next(pos, end - pos, &hdr) < 0)
+ return -1;
+
+ if (hdr.class != ASN1_CLASS_UNIVERSAL ||
+ hdr.tag != ASN1_TAG_INTEGER) {
+ wpa_printf(MSG_DEBUG, "DH: No INTEGER tag found for g; "
+ "class=%d tag=0x%x", hdr.class, hdr.tag);
+ return -1;
+ }
+
+ wpa_hexdump(MSG_MSGDUMP, "DH: base (g)", hdr.payload, hdr.length);
+ if (hdr.length == 0)
+ return -1;
+ os_free(cred->dh_g);
+ cred->dh_g = os_malloc(hdr.length);
+ if (cred->dh_g == NULL)
+ return -1;
+ os_memcpy(cred->dh_g, hdr.payload, hdr.length);
+ cred->dh_g_len = hdr.length;
+
+ return 0;
+}
+
+
+static const char *pem_dhparams_begin = "-----BEGIN DH PARAMETERS-----";
+static const char *pem_dhparams_end = "-----END DH PARAMETERS-----";
+
+
+static int tlsv1_set_dhparams_blob(struct tlsv1_credentials *cred,
+ const u8 *buf, size_t len)
+{
+ const u8 *pos, *end;
+ unsigned char *der;
+ size_t der_len;
+
+ pos = search_tag(pem_dhparams_begin, buf, len);
+ if (!pos) {
+ wpa_printf(MSG_DEBUG, "TLSv1: No PEM dhparams tag found - "
+ "assume DER format");
+ return tlsv1_set_dhparams_der(cred, buf, len);
+ }
+
+ wpa_printf(MSG_DEBUG, "TLSv1: Converting PEM format dhparams into DER "
+ "format");
+
+ pos += os_strlen(pem_dhparams_begin);
+ end = search_tag(pem_dhparams_end, pos, buf + len - pos);
+ if (end == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Could not find PEM dhparams end "
+ "tag (%s)", pem_dhparams_end);
+ return -1;
+ }
+
+ der = base64_decode(pos, end - pos, &der_len);
+ if (der == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Could not decode PEM dhparams");
+ return -1;
+ }
+
+ if (tlsv1_set_dhparams_der(cred, der, der_len) < 0) {
+ wpa_printf(MSG_INFO, "TLSv1: Failed to parse PEM dhparams "
+ "DER conversion");
+ os_free(der);
+ return -1;
+ }
+
+ os_free(der);
+
+ return 0;
+}
+
+
+/**
+ * tlsv1_set_dhparams - Set Diffie-Hellman parameters
+ * @cred: TLSv1 credentials from tlsv1_cred_alloc()
+ * @dh_file: File or reference name for the DH params in PEM or DER format
+ * @dh_blob: DH params as inlined data or %NULL if not used
+ * @dh_blob_len: dh_blob length
+ * Returns: 0 on success, -1 on failure
+ */
+int tlsv1_set_dhparams(struct tlsv1_credentials *cred, const char *dh_file,
+ const u8 *dh_blob, size_t dh_blob_len)
+{
+ if (dh_blob)
+ return tlsv1_set_dhparams_blob(cred, dh_blob, dh_blob_len);
+
+ if (dh_file) {
+ u8 *buf;
+ size_t len;
+ int ret;
+
+ buf = (u8 *) os_readfile(dh_file, &len);
+ if (buf == NULL) {
+ wpa_printf(MSG_INFO, "TLSv1: Failed to read '%s'",
+ dh_file);
+ return -1;
+ }
+
+ ret = tlsv1_set_dhparams_blob(cred, buf, len);
+ os_free(buf);
+ return ret;
+ }
+
+ return 0;
+}