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/* $OpenBSD: wycheproof.go,v 1.1 2018/07/25 18:04:09 jsing Exp $ */
/*
* Copyright (c) 2018 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Wycheproof runs test vectors from Project Wycheproof against libcrypto.
package main
/*
#cgo LDFLAGS: -lcrypto
#include <openssl/bn.h>
#include <openssl/objects.h>
#include <openssl/rsa.h>
*/
import "C"
import (
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"encoding/hex"
"encoding/json"
"fmt"
"hash"
"io/ioutil"
"log"
"os"
"path/filepath"
"unsafe"
)
const testVectorPath = "/usr/local/share/wycheproof/testvectors"
type wycheproofTest struct {
TCID int `json:"tcId"`
Comment string `json:"comment"`
Msg string `json:"msg"`
Sig string `json:"sig"`
Padding string `json:"padding"`
Result string `json:"result"`
Flags []string `json:"flags"`
}
type wycheproofTestGroup struct {
E string `json:"e"`
KeyASN string `json:"keyAsn"`
KeyDER string `json:"keyDer"`
KeyPEM string `json:"keyPem"`
KeySize int `json:"keysize"`
N string `json:"n"`
SHA string `json:"sha"`
Type string `json:"type"`
Tests []*wycheproofTest `json:"tests"`
}
type wycheproofTestVectors struct {
Algorithm string `json:"algorithm"`
GeneratorVersion string `json:"generatorVersion"`
Notes map[string]string `json:"notes"`
NumberOfTests int `json:"numberOfTests"`
// Header
TestGroups []*wycheproofTestGroup `json:"testGroups"`
}
func nidFromString(ns string) (int, error) {
switch ns {
case "SHA-1":
return C.NID_sha1, nil
case "SHA-224":
return C.NID_sha224, nil
case "SHA-256":
return C.NID_sha256, nil
case "SHA-384":
return C.NID_sha384, nil
case "SHA-512":
return C.NID_sha512, nil
default:
return -1, fmt.Errorf("unknown NID %q", ns)
}
}
func hashFromString(hs string) (hash.Hash, error) {
switch hs {
case "SHA-1":
return sha1.New(), nil
case "SHA-224":
return sha256.New224(), nil
case "SHA-256":
return sha256.New(), nil
case "SHA-384":
return sha512.New384(), nil
case "SHA-512":
return sha512.New(), nil
default:
return nil, fmt.Errorf("unknown hash %q", hs)
}
}
func runRSATest(rsa *C.RSA, nid int, h hash.Hash, wt *wycheproofTest) bool {
msg, err := hex.DecodeString(wt.Msg)
if err != nil {
log.Fatalf("Failed to decode message %q: %v", wt.Msg, err)
}
h.Reset()
h.Write(msg)
msg = h.Sum(nil)
sig, err := hex.DecodeString(wt.Sig)
if err != nil {
log.Fatalf("Failed to decode signature %q: %v", wt.Sig, err)
}
msgLen, sigLen := len(msg), len(sig)
if msgLen == 0 {
msg = append(msg, 0)
}
if sigLen == 0 {
sig = append(sig, 0)
}
ret := C.RSA_verify(C.int(nid), (*C.uchar)(unsafe.Pointer(&msg[0])), C.uint(msgLen),
(*C.uchar)(unsafe.Pointer(&sig[0])), C.uint(sigLen), rsa)
// XXX audit acceptable cases...
succeeded := true
if (ret == 1) != (wt.Result == "valid") && wt.Result != "acceptable" {
fmt.Printf("FAIL: Test case %d - RSA_verify() = %d, want %v\n", wt.TCID, int(ret), wt.Result)
succeeded = false
}
return succeeded
}
func runRSATestGroup(wtg *wycheproofTestGroup) bool {
fmt.Printf("Running RSA test group %v with key size %d and %v...\n", wtg.Type, wtg.KeySize, wtg.SHA)
rsa := C.RSA_new()
if rsa == nil {
log.Fatal("RSA_new failed")
}
defer C.RSA_free(rsa)
e := C.CString(wtg.E)
if C.BN_hex2bn(&rsa.e, e) == 0 {
log.Fatalf("Failed to set RSA e")
}
C.free(unsafe.Pointer(e))
n := C.CString(wtg.N)
if C.BN_hex2bn(&rsa.n, n) == 0 {
log.Fatalf("Failed to set RSA n")
}
C.free(unsafe.Pointer(n))
nid, err := nidFromString(wtg.SHA)
if err != nil {
log.Fatalf("Failed to get MD NID: %v", err)
}
h, err := hashFromString(wtg.SHA)
if err != nil {
log.Fatalf("Failed to get hash: %v", err)
}
succeeded := true
for _, wt := range wtg.Tests {
if !runRSATest(rsa, nid, h, wt) {
succeeded = false
}
}
return succeeded
}
func runRSATestVectors(path string) bool {
b, err := ioutil.ReadFile(path)
if err != nil {
log.Fatalf("Failed to read test vectors: %v", err)
}
wtv := &wycheproofTestVectors{}
if err := json.Unmarshal(b, wtv); err != nil {
log.Fatalf("Failed to unmarshal JSON: %v", err)
}
fmt.Printf("Loaded Wycheproof test vectors for %v with %d tests\n", wtv.Algorithm, wtv.NumberOfTests)
succeeded := true
for _, wtg := range wtv.TestGroups {
if !runRSATestGroup(wtg) {
succeeded = false
}
}
return succeeded
}
func main() {
if _, err := os.Stat(testVectorPath); os.IsNotExist(err) {
fmt.Printf("package wycheproof-testvectors is required for this regress\n")
fmt.Printf("SKIPPING\n")
os.Exit(0)
}
tvs, err := filepath.Glob(filepath.Join(testVectorPath, "*.json"))
if err != nil || len(tvs) == 0 {
log.Fatalf("Failed to find test vectors at %q\n", testVectorPath)
}
succeeded := true
tvs, err = filepath.Glob(filepath.Join(testVectorPath, "rsa_signature_*test.json"))
if err != nil {
log.Fatalf("Failed to find RSA test vectors: %v", err)
}
for _, tv := range tvs {
if !runRSATestVectors(tv) {
succeeded = false
}
}
if !succeeded {
os.Exit(1)
}
}
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