evp: prevent underflow in base64 decoding

[openssl.git] / ssl / s23_srvr.c

diff --git a/ssl/s23_srvr.c b/ssl/s23_srvr.c
index b21c57a1170a322bfb208cac16af295918c3082a..48778490135eb01130dcf009c3dda7534ffb341b 100644 (file)
--- a/ssl/s23_srvr.c
+++ b/ssl/s23_srvr.c
@@ -115,6 +115,9 @@
 #include <openssl/rand.h>
 #include <openssl/objects.h>
 #include <openssl/evp.h>
+#ifdef OPENSSL_FIPS
+#include <openssl/fips.h>
+#endif
 
 static const SSL_METHOD *ssl23_get_server_method(int ver);
 int ssl23_get_client_hello(SSL *s);
@@ -422,6 +425,15 @@ int ssl23_get_client_hello(SSL *s)
                        }
                }
 
+#ifdef OPENSSL_FIPS
+       if (FIPS_mode() && (s->version < TLS1_VERSION))
+               {
+               SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
+                                       SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
+               goto err;
+               }
+#endif
+
        if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
                {
                /* we have SSLv3/TLSv1 in an SSLv2 header