added basic trust-anchor code path

Pretty much the bare minimum to load trust anchors from file and check
that the submitter's certificate chains back to something valid.

6 files changed, 212 insertions, 6 deletions

diff --git a/server/main.go b/server/main.go
index 53ac8e6..f52433b 100644
--- a/server/main.go
+++ b/server/main.go
@@ -12,15 +12,18 @@ import (
 	"github.com/system-transparency/stfe"
 	"google.golang.org/grpc"
 
+	"github.com/google/certificate-transparency-go/trillian/ctfe"
 	ctutil "github.com/google/certificate-transparency-go/trillian/util"
+	"github.com/google/certificate-transparency-go/x509"
 )
 
 var (
-	httpEndpoint = flag.String("http_endpoint", "localhost:6965", "host:port specification of where stfe serves clients")
-	rpcBackend   = flag.String("log_rpc_server", "localhost:6962", "host:port specification of where Trillian serves clients")
-	prefix       = flag.String("prefix", "/st/v1", "a prefix that proceeds each endpoint path")
-	trillianID   = flag.Int64("trillianID", 5991359069696313945, "log identifier in the Trillian database")
-	rpcDeadline  = flag.Duration("rpc_deadline", time.Second*10, "deadline for backend RPC requests")
+	httpEndpoint   = flag.String("http_endpoint", "localhost:6965", "host:port specification of where stfe serves clients")
+	rpcBackend     = flag.String("log_rpc_server", "localhost:6962", "host:port specification of where Trillian serves clients")
+	prefix         = flag.String("prefix", "/st/v1", "a prefix that proceeds each endpoint path")
+	trillianID     = flag.Int64("trillian_id", 5991359069696313945, "log identifier in the Trillian database")
+	rpcDeadline    = flag.Duration("rpc_deadline", time.Second*10, "deadline for backend RPC requests")
+	anchorsPemFile = flag.String("anchors_file", "testdata/anchors.pem", "path to a file containing PEM-encoded X.509 root certificates")
 )
 
 func main() {
@@ -37,8 +40,15 @@ func main() {
 	mux := http.NewServeMux()
 	http.Handle("/", mux)
 
+	// TODO: proper setup
+	glog.Info("Loading trust anchors")
+	cert_pool := ctfe.NewPEMCertPool()
+	cert_pool.AppendCertsFromPEMFile(*anchorsPemFile)
+	anchors := ctfe.NewCertValidationOpts(cert_pool, time.Now(), true, false, nil, nil, false, []x509.ExtKeyUsage{})
+	glog.Infof("%v", cert_pool.Subjects())
+
 	glog.Info("Creating STFE server instance")
-	stfe_server := stfe.NewInstance(*prefix, *trillianID, trillian.NewTrillianLogClient(conn), *rpcDeadline, new(ctutil.SystemTimeSource))
+	stfe_server := stfe.NewInstance(*prefix, *trillianID, trillian.NewTrillianLogClient(conn), *rpcDeadline, new(ctutil.SystemTimeSource), anchors)
 	stfe_server.AddEndpoints(mux)
 
 	glog.Infof("Serving on %v%v", *httpEndpoint, *prefix)
diff --git a/server/testdata/anchors.pem b/server/testdata/anchors.pem
new file mode 100644
index 0000000..6a96054
--- /dev/null
+++ b/server/testdata/anchors.pem
@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
+MIIFiTCCA3GgAwIBAgIUCpdSpYgFV7bmPzdIAcesg5ZJxe4wDQYJKoZIhvcNAQEL
+BQAwVDELMAkGA1UEBhMCU0UxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
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+-----END CERTIFICATE-----
diff --git a/server/testdata/end-entity.key b/server/testdata/end-entity.key
new file mode 100644
index 0000000..f232f2e
--- /dev/null
+++ b/server/testdata/end-entity.key
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----
diff --git a/server/testdata/end-entity.pem b/server/testdata/end-entity.pem
new file mode 100644
index 0000000..ab5154f
--- /dev/null
+++ b/server/testdata/end-entity.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/server/testdata/root.key b/server/testdata/root.key
new file mode 100644
index 0000000..97effe3
--- /dev/null
+++ b/server/testdata/root.key
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----
diff --git a/server/testdata/root.pem b/server/testdata/root.pem
new file mode 100644
index 0000000..6a96054
--- /dev/null
+++ b/server/testdata/root.pem
@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----