From 67c408cee9b01a7c8c7ca002d36b4f8c0612b08c Mon Sep 17 00:00:00 2001 From: Scott Deboy Date: Thu, 1 Aug 2013 11:54:09 -0700 Subject: [PATCH] Free generated supp data after handshake completion, add comment regarding use of num_renegotiations in TLS and supp data generation callbacks --- apps/s_client.c | 24 ++++++++++++++++++------ apps/s_server.c | 24 ++++++++++++++++++------ 2 files changed, 36 insertions(+), 12 deletions(-) diff --git a/apps/s_client.c b/apps/s_client.c index b4ea03ba77..6a4b2daf2d 100644 --- a/apps/s_client.c +++ b/apps/s_client.c @@ -225,8 +225,10 @@ static int c_brief=0; #ifndef OPENSSL_NO_TLSEXT -static const unsigned char *most_recent_supplemental_data; -static size_t most_recent_supplemental_data_length; +static unsigned char *generated_supp_data = NULL; + +static unsigned char *most_recent_supplemental_data = NULL; +static size_t most_recent_supplemental_data_length = 0; static int server_provided_server_authz = 0; static int server_provided_client_authz = 0; @@ -1779,6 +1781,13 @@ SSL_set_tlsext_status_ids(con, ids); "CONNECTION ESTABLISHED\n"); print_ssl_summary(bio_err, con); } + /*handshake is complete - free the generated supp data allocated in the callback */ + if (generated_supp_data) + { + OPENSSL_free(generated_supp_data); + generated_supp_data = NULL; + } + print_stuff(bio_c_out,con,full_log); if (full_log > 0) full_log--; @@ -2450,6 +2459,8 @@ static int authz_tlsext_generate_cb(SSL *s, unsigned short ext_type, { if (c_auth) { + /*if auth_require_reneg flag is set, only send extensions if + renegotiation has occurred */ if (!c_auth_require_reneg || (c_auth_require_reneg && SSL_num_renegotiations(s))) { *out = auth_ext_data; @@ -2478,15 +2489,16 @@ static int auth_suppdata_generate_cb(SSL *s, unsigned short supp_data_type, const unsigned char **out, unsigned short *outlen, void *arg) { - unsigned char *result; if (c_auth && server_provided_client_authz && server_provided_server_authz) { + /*if auth_require_reneg flag is set, only send supplemental data if + renegotiation has occurred */ if (!c_auth_require_reneg || (c_auth_require_reneg && SSL_num_renegotiations(s))) { - result = OPENSSL_malloc(10); - memcpy(result, "5432154321", 10); - *out = result; + generated_supp_data = OPENSSL_malloc(10); + memcpy(generated_supp_data, "5432154321", 10); + *out = generated_supp_data; *outlen = 10; return 1; } diff --git a/apps/s_server.c b/apps/s_server.c index 29189fde29..44acb1e79a 100644 --- a/apps/s_server.c +++ b/apps/s_server.c @@ -229,8 +229,10 @@ static void s_server_init(void); static const unsigned char auth_ext_data[]={TLSEXT_AUTHZDATAFORMAT_dtcp}; -static const unsigned char *most_recent_supplemental_data; -static size_t most_recent_supplemental_data_length; +static unsigned char *generated_supp_data = NULL; + +static unsigned char *most_recent_supplemental_data = NULL; +static size_t most_recent_supplemental_data_length = 0; static int client_provided_server_authz = 0; static int client_provided_client_authz = 0; @@ -2673,6 +2675,13 @@ static int init_ssl_connection(SSL *con) i=SSL_accept(con); } #endif + /*handshake is complete - free the generated supp data allocated in the callback */ + if (generated_supp_data) + { + OPENSSL_free(generated_supp_data); + generated_supp_data = NULL; + } + if (i <= 0) { if (BIO_sock_should_retry(i)) @@ -3583,6 +3592,8 @@ static int authz_tlsext_generate_cb(SSL *s, unsigned short ext_type, { if (c_auth && client_provided_client_authz && client_provided_server_authz) { + /*if auth_require_reneg flag is set, only send extensions if + renegotiation has occurred */ if (!c_auth_require_reneg || (c_auth_require_reneg && SSL_num_renegotiations(s))) { @@ -3612,15 +3623,16 @@ static int auth_suppdata_generate_cb(SSL *s, unsigned short supp_data_type, const unsigned char **out, unsigned short *outlen, void *arg) { - unsigned char *result; if (c_auth && client_provided_client_authz && client_provided_server_authz) { + /*if auth_require_reneg flag is set, only send supplemental data if + renegotiation has occurred */ if (!c_auth_require_reneg || (c_auth_require_reneg && SSL_num_renegotiations(s))) { - result = OPENSSL_malloc(10); - memcpy(result, "1234512345", 10); - *out = result; + generated_supp_data = OPENSSL_malloc(10); + memcpy(generated_supp_data, "1234512345", 10); + *out = generated_supp_data; *outlen = 10; return 1; } -- 2.25.1