add initial support for RFC 4279 PSK SSL ciphersuites
PR: 1191
Submitted by: Mika Kousa and Pasi Eronen of Nokia Corporation
Reviewed by: Nils Larsch
diff --git a/ssl/ssltest.c b/ssl/ssltest.c
index dfe18b0..0d61116 100644
--- a/ssl/ssltest.c
+++ b/ssl/ssltest.c
@@ -113,6 +113,32 @@
* ECC cipher suite support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE.
+ */
#define _BSD_SOURCE 1 /* Or gethostname won't be declared properly
on Linux and GNU platforms. */
@@ -207,6 +233,16 @@
static DH *get_dh1024dsa(void);
#endif
+
+static char *psk_key=NULL; /* by default PSK is not used */
+#ifndef OPENSSL_NO_PSK
+static unsigned int psk_client_callback(SSL *ssl, const char *hint, char *identity,
+ unsigned int max_identity_len, unsigned char *psk,
+ unsigned int max_psk_len);
+static unsigned int psk_server_callback(SSL *ssl, const char *identity, unsigned char *psk,
+ unsigned int max_psk_len);
+#endif
+
static BIO *bio_err=NULL;
static BIO *bio_stdout=NULL;
@@ -247,6 +283,9 @@
#ifndef OPENSSL_NO_ECDH
fprintf(stderr," -no_ecdhe - disable ECDHE\n");
#endif
+#ifndef OPENSSL_NO_PSK
+ fprintf(stderr," -psk arg - PSK in hex (without 0x)\n");
+#endif
#ifndef OPENSSL_NO_SSL2
fprintf(stderr," -ssl2 - use SSLv2\n");
#endif
@@ -417,6 +456,7 @@
#endif
int no_dhe = 0;
int no_ecdhe = 0;
+ int no_psk = 0;
int print_time = 0;
clock_t s_time = 0, c_time = 0;
int comp = 0;
@@ -496,6 +536,20 @@
no_dhe=1;
else if (strcmp(*argv,"-no_ecdhe") == 0)
no_ecdhe=1;
+ else if (strcmp(*argv,"-psk") == 0)
+ {
+ if (--argc < 1) goto bad;
+ psk_key=*(++argv);
+#ifndef OPENSSL_NO_PSK
+ if (strspn(psk_key, "abcdefABCDEF1234567890") != strlen(psk_key))
+ {
+ BIO_printf(bio_err,"Not a hex number '%s'\n",*argv);
+ goto bad;
+ }
+#else
+ no_psk=1;
+#endif
+ }
else if (strcmp(*argv,"-ssl2") == 0)
ssl2=1;
else if (strcmp(*argv,"-tls1") == 0)
@@ -833,6 +887,31 @@
SSL_CTX_set_session_id_context(s_ctx, (void *)&session_id_context, sizeof session_id_context);
}
+ /* Use PSK only if PSK key is given */
+ if (psk_key != NULL)
+ {
+ /* no_psk is used to avoid putting psk command to openssl tool */
+ if (no_psk)
+ {
+ /* if PSK is not compiled in and psk key is
+ * given, do nothing and exit successfully */
+ ret=0;
+ goto end;
+ }
+#ifndef OPENSSL_NO_PSK
+ SSL_CTX_set_psk_client_callback(c_ctx, psk_client_callback);
+ SSL_CTX_set_psk_server_callback(s_ctx, psk_server_callback);
+ if (debug)
+ BIO_printf(bio_err,"setting PSK identity hint to s_ctx\n");
+ if (!SSL_CTX_use_psk_identity_hint(s_ctx, "ctx server identity_hint"))
+ {
+ BIO_printf(bio_err,"error setting PSK identity hint to s_ctx\n");
+ ERR_print_errors(bio_err);
+ goto end;
+ }
+#endif
+ }
+
c_ssl=SSL_new(c_ctx);
s_ssl=SSL_new(s_ctx);
@@ -2236,6 +2315,69 @@
}
#endif
+#ifndef OPENSSL_NO_PSK
+/* convert the PSK key (psk_key) in ascii to binary (psk) */
+static int psk_key2bn(const char *pskkey, unsigned char *psk,
+ unsigned int max_psk_len)
+ {
+ int ret;
+ BIGNUM *bn = NULL;
+
+ ret = BN_hex2bn(&bn, pskkey);
+ if (!ret)
+ {
+ BIO_printf(bio_err,"Could not convert PSK key '%s' to BIGNUM\n", pskkey);
+ if (bn)
+ BN_free(bn);
+ return 0;
+ }
+ if (BN_num_bytes(bn) > (int)max_psk_len)
+ {
+ BIO_printf(bio_err,"psk buffer of callback is too small (%d) for key (%d)\n",
+ max_psk_len, BN_num_bytes(bn));
+ BN_free(bn);
+ return 0;
+ }
+ ret = BN_bn2bin(bn, psk);
+ BN_free(bn);
+ return ret;
+ }
+
+static unsigned int psk_client_callback(SSL *ssl, const char *hint, char *identity,
+ unsigned int max_identity_len, unsigned char *psk,
+ unsigned int max_psk_len)
+ {
+ int ret;
+ unsigned int psk_len = 0;
+
+ ret = snprintf(identity, max_identity_len, "Client_identity");
+ if (ret < 0)
+ goto out_err;
+ if (debug)
+ fprintf(stderr, "client: created identity '%s' len=%d\n", identity, ret);
+ ret = psk_key2bn(psk_key, psk, max_psk_len);
+ if (ret < 0)
+ goto out_err;
+ psk_len = ret;
+out_err:
+ return psk_len;
+ }
+
+static unsigned int psk_server_callback(SSL *ssl, const char *identity,
+ unsigned char *psk, unsigned int max_psk_len)
+ {
+ unsigned int psk_len=0;
+
+ if (strcmp(identity, "Client_identity") != 0)
+ {
+ BIO_printf(bio_err, "server: PSK error: client identity not found\n");
+ return 0;
+ }
+ psk_len=psk_key2bn(psk_key, psk, max_psk_len);
+ return psk_len;
+ }
+#endif
+
static int do_test_cipherlist(void)
{
int i = 0;
