/* Copyright (c) 2018, Google Inc.
*
* Permission to use, copy, modify, and/or 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. */
// convert_wycheproof.go converts Wycheproof test vectors into a format more
// easily consumed by BoringSSL.
package main
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"sort"
"strings"
)
type wycheproofTest struct {
Algorithm string `json:"algorithm"`
GeneratorVersion string `json:"generatorVersion"`
NumberOfTests int `json:"numberOfTests"`
Notes map[string]string `json:"notes"`
Header []string `json:"header"`
// encoding/json does not support collecting unused keys, so we leave
// everything past this point as generic.
TestGroups []map[string]interface{} `json:"testGroups"`
}
func sortedKeys(m map[string]interface{}) []string {
keys := make([]string, 0, len(m))
for k, _ := range m {
keys = append(keys, k)
}
sort.Strings(keys)
return keys
}
func printAttribute(w io.Writer, key string, valueI interface{}, isInstruction bool) error {
switch value := valueI.(type) {
case float64:
if float64(int(value)) != value {
panic(key + "was not an integer.")
}
if isInstruction {
if _, err := fmt.Fprintf(w, "[%s = %d]\n", key, int(value)); err != nil {
return err
}
} else {
if _, err := fmt.Fprintf(w, "%s = %d\n", key, int(value)); err != nil {
return err
}
}
case string:
if strings.Contains(value, "\n") {
panic(key + " contained a newline.")
}
if isInstruction {
if _, err := fmt.Fprintf(w, "[%s = %s]\n", key, value); err != nil {
return err
}
} else {
if _, err := fmt.Fprintf(w, "%s = %s\n", key, value); err != nil {
return err
}
}
case map[string]interface{}:
for _, k := range sortedKeys(value) {
if err := printAttribute(w, key+"."+k, value[k], isInstruction); err != nil {
return err
}
}
default:
panic(fmt.Sprintf("Unknown type for %q: %T", key, valueI))
}
return nil
}
func printComment(w io.Writer, in string) error {
const width = 80 - 2
lines := strings.Split(in, "\n")
for _, line := range lines {
for {
if len(line) <= width {
if _, err := fmt.Fprintf(w, "# %s\n", line); err != nil {
return err
}
break
}
// Find the last space we can break at.
n := strings.LastIndexByte(line[:width+1], ' ')
if n < 0 {
// The next word is too long. Wrap as soon as that word ends.
n = strings.IndexByte(line[width+1:], ' ')
if n < 0 {
// This was the last word.
if _, err := fmt.Fprintf(w, "# %s\n", line); err != nil {
return nil
}
break
}
n += width + 1
}
if _, err := fmt.Fprintf(w, "# %s\n", line[:n]); err != nil {
return err
}
line = line[n+1:] // Ignore the space.
}
}
return nil
}
func convertWycheproof(f io.Writer, jsonPath string) error {
jsonData, err := ioutil.ReadFile(jsonPath)
if err != nil {
return err
}
var w wycheproofTest
if err := json.Unmarshal(jsonData, &w); err != nil {
return err
}
if _, err := fmt.Fprintf(f, `# Imported from Wycheproof's %s.
# This file is generated by convert_wycheproof.go. Do not edit by hand.
#
# Algorithm: %s
# Generator version: %s
`, jsonPath, w.Algorithm, w.GeneratorVersion); err != nil {
return err
}
for _, group := range w.TestGroups {
for _, k := range sortedKeys(group) {
// Wycheproof files always include both keyPem and
// keyDer. Skip keyPem as they contain newlines. We
// process keyDer more easily.
if k == "type" || k == "tests" || k == "keyPem" {
continue
}
if err := printAttribute(f, k, group[k], true); err != nil {
return err
}
}
fmt.Fprintf(f, "\n")
tests := group["tests"].([]interface{})
for _, testI := range tests {
test := testI.(map[string]interface{})
if _, err := fmt.Fprintf(f, "# tcId = %d\n", int(test["tcId"].(float64))); err != nil {
return err
}
if comment, ok := test["comment"]; ok && len(comment.(string)) != 0 {
if err := printComment(f, comment.(string)); err != nil {
return err
}
}
for _, k := range sortedKeys(test) {
if k == "comment" || k == "flags" || k == "tcId" {
continue
}
if err := printAttribute(f, k, test[k], false); err != nil {
return err
}
}
if flags, ok := test["flags"]; ok {
for _, flag := range flags.([]interface{}) {
if note, ok := w.Notes[flag.(string)]; ok {
if err := printComment(f, note); err != nil {
return err
}
}
}
}
if _, err := fmt.Fprintf(f, "\n"); err != nil {
return err
}
}
}
return nil
}
var defaultInputs = []string{
"aes_cbc_pkcs5_test.json",
"aes_cmac_test.json",
"aes_gcm_siv_test.json",
"aes_gcm_test.json",
"chacha20_poly1305_test.json",
"dsa_test.json",
"ecdh_secp224r1_test.json",
"ecdh_secp256r1_test.json",
"ecdh_secp384r1_test.json",
"ecdh_secp521r1_test.json",
"ecdsa_secp224r1_sha224_test.json",
"ecdsa_secp224r1_sha256_test.json",
"ecdsa_secp224r1_sha512_test.json",
"ecdsa_secp256r1_sha256_test.json",
"ecdsa_secp256r1_sha512_test.json",
"ecdsa_secp384r1_sha384_test.json",
"ecdsa_secp384r1_sha512_test.json",
"ecdsa_secp521r1_sha512_test.json",
"eddsa_test.json",
"kw_test.json",
"rsa_pss_2048_sha1_mgf1_20_test.json",
"rsa_pss_2048_sha256_mgf1_0_test.json",
"rsa_pss_2048_sha256_mgf1_32_test.json",
"rsa_pss_3072_sha256_mgf1_32_test.json",
"rsa_pss_4096_sha256_mgf1_32_test.json",
"rsa_pss_4096_sha512_mgf1_32_test.json",
"rsa_pss_misc_test.json",
"rsa_signature_test.json",
"x25519_test.json",
}
func main() {
switch len(os.Args) {
case 1:
for _, jsonPath := range defaultInputs {
if !strings.HasSuffix(jsonPath, ".json") {
panic(jsonPath)
}
txtPath := jsonPath[:len(jsonPath)-len(".json")] + ".txt"
out, err := os.Create(txtPath)
if err != nil {
fmt.Fprintf(os.Stderr, "Error opening output %s: %s\n", txtPath, err)
os.Exit(1)
}
defer out.Close()
if err := convertWycheproof(out, jsonPath); err != nil {
fmt.Fprintf(os.Stderr, "Error converting %s: %s\n", jsonPath, err)
os.Exit(1)
}
}
case 2:
if err := convertWycheproof(os.Stdout, os.Args[1]); err != nil {
fmt.Fprintf(os.Stderr, "Error converting %s: %s\n", os.Args[1], err)
os.Exit(1)
}
default:
fmt.Fprintf(os.Stderr, "Usage: %s [input JSON]\n", os.Args[0])
os.Exit(1)
}
}