Forbid PKCS1 in TLS 1.3.

BUG=84

Change-Id: Ie5eaefddd161488996033de28c0ebd1064bb793d
Reviewed-on: https://boringssl-review.googlesource.com/10484
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/ssl/test/runner/runner.go b/ssl/test/runner/runner.go
index 8221286..3e4ba2e 100644
--- a/ssl/test/runner/runner.go
+++ b/ssl/test/runner/runner.go
@@ -5484,6 +5484,10 @@
 			if ver.version == VersionTLS12 && hasComponent(alg.name, "PSS") {
 				shouldFail = true
 			}
+			// RSA-PKCS1 does not exist in TLS 1.3.
+			if ver.version == VersionTLS13 && hasComponent(alg.name, "PKCS1") {
+				shouldFail = true
+			}
 
 			var signError, verifyError string
 			if shouldFail {