Rename all the signature algorithm tests.

ServerKeyExchange and SigningHash are both very 1.2-specific names.
Replace with names that fit both 1.2 and 1.3 (and are a bit shorter).

Also fix a reference to ServerKeyExchange in sign.go.

Change-Id: I25d4ff135cc77cc545f0f9e94014244d56a9e96b
Reviewed-on: https://boringssl-review.googlesource.com/8773
Reviewed-by: David Benjamin <davidben@google.com>

ssl/test/runner/runner.go

diff --git a/ssl/test/runner/runner.go b/ssl/test/runner/runner.go
index e5494ba..3063601 100644
--- a/ssl/test/runner/runner.go
+++ b/ssl/test/runner/runner.go
@@ -4807,7 +4807,7 @@
 			suffix := "-" + alg.name + "-" + ver.name
 
 			testCases = append(testCases, testCase{
-				name: "SigningHash-ClientAuth-Sign" + suffix,
+				name: "ClientAuth-Sign" + suffix,
 				config: Config{
 					MaxVersion: ver.version,
 					ClientAuth: RequireAnyClientCert,
@@ -4829,7 +4829,7 @@
 
 			testCases = append(testCases, testCase{
 				testType: serverTest,
-				name:     "SigningHash-ClientAuth-Verify" + suffix,
+				name:     "ClientAuth-Verify" + suffix,
 				config: Config{
 					MaxVersion:   ver.version,
 					Certificates: []Certificate{getRunnerCertificate(alg.cert)},
@@ -4855,7 +4855,7 @@
 
 			testCases = append(testCases, testCase{
 				testType: serverTest,
-				name:     "SigningHash-ServerKeyExchange-Sign" + suffix,
+				name:     "ServerAuth-Sign" + suffix,
 				config: Config{
 					MaxVersion: ver.version,
 					CipherSuites: []uint16{
@@ -4879,7 +4879,7 @@
 			})
 
 			testCases = append(testCases, testCase{
-				name: "SigningHash-ServerKeyExchange-Verify" + suffix,
+				name: "ServerAuth-Verify" + suffix,
 				config: Config{
 					MaxVersion:   ver.version,
 					Certificates: []Certificate{getRunnerCertificate(alg.cert)},
@@ -4909,7 +4909,7 @@
 	//
 	// TODO(davidben): Test this in TLS 1.3.
 	testCases = append(testCases, testCase{
-		name: "SigningHash-ClientAuth-SignatureType",
+		name: "ClientAuth-SignatureType",
 		config: Config{
 			ClientAuth: RequireAnyClientCert,
 			MaxVersion: VersionTLS12,
@@ -4928,7 +4928,7 @@
 
 	testCases = append(testCases, testCase{
 		testType: serverTest,
-		name:     "SigningHash-ServerKeyExchange-SignatureType",
+		name:     "ServerAuth-SignatureType",
 		config: Config{
 			MaxVersion:   VersionTLS12,
 			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
@@ -4965,7 +4965,7 @@
 	})
 
 	testCases = append(testCases, testCase{
-		name: "Verify-ServerKeyExchange-SignatureType",
+		name: "Verify-ServerAuth-SignatureType",
 		config: Config{
 			MaxVersion:   VersionTLS12,
 			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
@@ -4983,7 +4983,7 @@
 	// Test that, if the list is missing, the peer falls back to SHA-1 in
 	// TLS 1.2, but not TLS 1.3.
 	testCases = append(testCases, testCase{
-		name: "SigningHash-ClientAuth-Fallback",
+		name: "ClientAuth-SHA1-Fallback",
 		config: Config{
 			MaxVersion: VersionTLS12,
 			ClientAuth: RequireAnyClientCert,
@@ -5002,7 +5002,7 @@
 
 	testCases = append(testCases, testCase{
 		testType: serverTest,
-		name:     "SigningHash-ServerKeyExchange-Fallback",
+		name:     "ServerAuth-SHA1-Fallback",
 		config: Config{
 			MaxVersion:   VersionTLS12,
 			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
@@ -5016,7 +5016,7 @@
 	})
 
 	testCases = append(testCases, testCase{
-		name: "SigningHash-ClientAuth-Fallback-TLS13",
+		name: "ClientAuth-NoFallback-TLS13",
 		config: Config{
 			MaxVersion: VersionTLS13,
 			ClientAuth: RequireAnyClientCert,
@@ -5037,7 +5037,7 @@
 
 	testCases = append(testCases, testCase{
 		testType: serverTest,
-		name:     "SigningHash-ServerKeyExchange-Fallback-TLS13",
+		name:     "ServerAuth-NoFallback-TLS13",
 		config: Config{
 			MaxVersion:   VersionTLS13,
 			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
@@ -5056,7 +5056,7 @@
 	// rejecting MD5 signatures.
 	testCases = append(testCases, testCase{
 		testType: serverTest,
-		name:     "SigningHash-ClientAuth-Enforced",
+		name:     "ClientAuth-Enforced",
 		config: Config{
 			MaxVersion:   VersionTLS12,
 			Certificates: []Certificate{rsaCertificate},
@@ -5078,7 +5078,7 @@
 	})
 
 	testCases = append(testCases, testCase{
-		name: "SigningHash-ServerKeyExchange-Enforced",
+		name: "ServerAuth-Enforced",
 		config: Config{
 			MaxVersion:   VersionTLS12,
 			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},

ssl/test/runner/sign.go

diff --git a/ssl/test/runner/sign.go b/ssl/test/runner/sign.go
index 1d95c6a..0705f3a 100644
--- a/ssl/test/runner/sign.go
+++ b/ssl/test/runner/sign.go
@@ -61,7 +61,7 @@
 
 func verifyMessage(version uint16, key crypto.PublicKey, config *Config, sigAlg signatureAlgorithm, msg, sig []byte) error {
 	if version >= VersionTLS12 && !isSupportedSignatureAlgorithm(sigAlg, config.verifySignatureAlgorithms()) {
-		return errors.New("tls: unsupported signature algorithm for ServerKeyExchange")
+		return errors.New("tls: unsupported signature algorithm")
 	}
 
 	signer, err := getSigner(version, key, config, sigAlg)