ssl/statem: Don't compare size_t with less than zero

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7194)

diff --git a/ssl/statem/extensions.c b/ssl/statem/extensions.c
index 8422161dc103679da683127a7e31ce043edffd1c..8d4939d601258a0e5d5e8f04632ad6c9f185064c 100644 (file)
--- a/ssl/statem/extensions.c
+++ b/ssl/statem/extensions.c
@@ -1530,10 +1530,12 @@ int tls_psk_do_binder(SSL *s, const EVP_MD *md, const unsigned char *msgstart,
      */
     if (s->hello_retry_request == SSL_HRR_PENDING) {
         size_t hdatalen;
+        long hdatalen_l;
         void *hdata;
 
-        hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
-        if (hdatalen <= 0) {
+        hdatalen = hdatalen_l =
+            BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
+        if (hdatalen_l <= 0) {
             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PSK_DO_BINDER,
                      SSL_R_BAD_HANDSHAKE_LENGTH);
             goto err;

diff --git a/ssl/statem/statem_lib.c b/ssl/statem/statem_lib.c
index 508bb88767a73092901f46b5d28886eb632f09b8..e6e61f787686d188fc065a08dd6b62e78bfbe108 100644 (file)
--- a/ssl/statem/statem_lib.c
+++ b/ssl/statem/statem_lib.c
@@ -203,9 +203,10 @@ static int get_cert_verify_tbs_data(SSL *s, unsigned char *tls13tbs,
         *hdatalen = TLS13_TBS_PREAMBLE_SIZE + hashlen;
     } else {
         size_t retlen;
+        long retlen_l;
 
-        retlen = BIO_get_mem_data(s->s3->handshake_buffer, hdata);
-        if (retlen <= 0) {
+        retlen = retlen_l = BIO_get_mem_data(s->s3->handshake_buffer, hdata);
+        if (retlen_l <= 0) {
             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_GET_CERT_VERIFY_TBS_DATA,
                      ERR_R_INTERNAL_ERROR);
             return 0;