Added flag to prohibit renegotiations.

[BearSSL] / src / ssl / ssl_hs_common.t0

diff --git a/src/ssl/ssl_hs_common.t0 b/src/ssl/ssl_hs_common.t0
index b8f8478..1eb5347 100644 (file)
--- a/src/ssl/ssl_hs_common.t0
+++ b/src/ssl/ssl_hs_common.t0
@@ -156,6 +156,7 @@ addr-eng: ecdhe_point
 addr-eng: ecdhe_point_len
 addr-eng: reneg
 addr-eng: saved_finished
+addr-eng: flags
 addr-eng: pad
 addr-eng: action
 addr-eng: alert
@@ -174,6 +175,10 @@ addr-session-field: version
 addr-session-field: cipher_suite
 addr-session-field: master_secret
 
+\ Check a server flag by index.
+: flag? ( index -- bool )
+       addr-flags get32 swap >> 1 and neg ;
+
 \ Define a word that evaluates to an error constant. This assumes that
 \ all relevant error codes are in the 0..63 range.
 : err:
@@ -449,6 +454,9 @@ cc: read-chunk-native ( addr len -- addr len ) {
                1 of
                        0 addr-alert set8
                        \ close_notify has value 0.
+                       \ no_renegotiation has value 100, and we treat it
+                       \ as a fatal alert.
+                       dup 100 = if 256 + fail then
                        0= ret
                endof
                \ Fatal alert implies context termination.