/usr/share/gocode/src/github.com/miekg/pkcs11/test/parallel_test.go is in golang-github-miekg-pkcs11-dev 0.0~git20151009.0.793689b-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | package pkcs11test
// A test of using several pkcs11 sessions in parallel for signing across
// multiple goroutines. Access to the PKCS11 module is thread-safe because of
// the C.CKF_OS_LOCKING_OK param and nil mutex functions that the pkcs11
// package passes to C.Initialize, which indicate that the module should use OS
// locking primitives on its own.
//
// Note that while access to the module is thread-safe, sessions are not thread
// safe, and each session must be protected from simultaneous use by some
// synchronization mechanism. In this case we use a cache of sessions (as
// embodied by the `signer` struct), protected by a condition variable. So long
// as there is an available signer in the cache, it is popped off and used. If
// there are no signers available, the caller blocks until there is one
// available.
//
// This test will fail if run with `go test ./test`. Instead you must pass it
// appropriate flags, e.g.:
// go test ./test/ -module /usr/lib/softhsm/libsofthsm.so \
// -tokenLabel "softhsm token" -privateKeyLabel "my key" -pin 1234 -v
import "fmt"
import "flag"
import "log"
import "testing"
import "sync"
import "github.com/miekg/pkcs11"
var module = flag.String("module", "", "Path to PKCS11 module")
var tokenLabel = flag.String("tokenLabel", "", "Token label")
var pin = flag.String("pin", "", "PIN")
var privateKeyLabel = flag.String("privateKeyLabel", "", "Private key label")
func initPKCS11Context(modulePath string) (*pkcs11.Ctx, error) {
context := pkcs11.New(modulePath)
if context == nil {
return nil, fmt.Errorf("unable to load PKCS#11 module")
}
err := context.Initialize()
return context, err
}
func getSlot(p *pkcs11.Ctx, label string) (uint, error) {
slots, err := p.GetSlotList(true)
if err != nil {
return 0, err
}
for _, slot := range slots {
_, err := p.GetSlotInfo(slot)
if err != nil {
return 0, err
}
tokenInfo, err := p.GetTokenInfo(slot)
if err != nil {
return 0, err
}
if tokenInfo.Label == label {
return slot, nil
}
}
return 0, fmt.Errorf("Slot not found: %s", label)
}
func getPrivateKey(context *pkcs11.Ctx, session pkcs11.SessionHandle, label string) (pkcs11.ObjectHandle, error) {
var noKey pkcs11.ObjectHandle
template := []*pkcs11.Attribute{
pkcs11.NewAttribute(pkcs11.CKA_CLASS, pkcs11.CKO_PRIVATE_KEY),
pkcs11.NewAttribute(pkcs11.CKA_LABEL, label),
}
if err := context.FindObjectsInit(session, template); err != nil {
return noKey, err
}
objs, _, err := context.FindObjects(session, 2)
if err != nil {
return noKey, err
}
if err = context.FindObjectsFinal(session); err != nil {
return noKey, err
}
if len(objs) == 0 {
err = fmt.Errorf("private key not found")
return noKey, err
}
return objs[0], nil
}
type signer struct {
context *pkcs11.Ctx
session pkcs11.SessionHandle
privateKey pkcs11.ObjectHandle
}
func makeSigner(context *pkcs11.Ctx) (*signer, error) {
slot, err := getSlot(context, *tokenLabel)
if err != nil {
return nil, err
}
session, err := context.OpenSession(slot, pkcs11.CKF_SERIAL_SESSION)
if err != nil {
return nil, err
}
if err = context.Login(session, pkcs11.CKU_USER, *pin); err != nil {
context.CloseSession(session)
return nil, err
}
privateKey, err := getPrivateKey(context, session, *privateKeyLabel)
if err != nil {
context.CloseSession(session)
return nil, err
}
return &signer{context, session, privateKey}, nil
}
func (s *signer) sign(input []byte) ([]byte, error) {
mechanism := []*pkcs11.Mechanism{pkcs11.NewMechanism(pkcs11.CKM_RSA_PKCS, nil)}
if err := s.context.SignInit(s.session, mechanism, s.privateKey); err != nil {
log.Fatalf("SignInit: %s", err)
}
signed, err := s.context.Sign(s.session, input)
if err != nil {
log.Fatalf("Sign: %s", err)
}
return signed, nil
}
type cache struct {
signers []*signer
// this variable signals the condition that there are signers available to be
// used.
cond *sync.Cond
}
func newCache(signers []*signer) cache {
var mutex sync.Mutex
return cache{
signers: signers,
cond: sync.NewCond(&mutex),
}
}
func (c *cache) get() *signer {
c.cond.L.Lock()
for len(c.signers) == 0 {
c.cond.Wait()
}
instance := c.signers[len(c.signers)-1]
c.signers = c.signers[:len(c.signers)-1]
c.cond.L.Unlock()
return instance
}
func (c *cache) put(instance *signer) {
c.cond.L.Lock()
c.signers = append(c.signers, instance)
c.cond.Signal()
c.cond.L.Unlock()
}
func (c *cache) sign(input []byte) ([]byte, error) {
instance := c.get()
defer c.put(instance)
return instance.sign(input)
}
func TestParallel(t *testing.T) {
if *module == "" || *tokenLabel == "" || *pin == "" || *privateKeyLabel == "" {
t.Fatal("Must pass all flags: module, tokenLabel, pin, and privateKeyLabel")
return
}
context, err := initPKCS11Context(*module)
if err != nil {
t.Fatal(err)
}
defer func() {
context.Finalize()
context.Destroy()
}()
const nSigners = 100
const nSignatures = 1000
signers := make([]*signer, nSigners)
for i := 0; i < nSigners; i++ {
signers[i], err = makeSigner(context)
if err != nil {
t.Fatalf("Problem making signer: %s", err)
}
}
pool := newCache(signers)
output := make(chan []byte, nSignatures)
for i := 0; i < nSignatures; i++ {
go func() {
result, err := pool.sign([]byte("hi"))
if err != nil {
t.Fatal(err)
}
output <- result
}()
}
for i := 0; i < nSignatures; i++ {
// Consume the output of the signers, but do nothing with it.
<- output
}
for i := 0; i < nSigners; i++ {
// Note: It is not necessary to call context.Logout. Closing the last
// session will automatically log out, per PKCS#11 API.
context.CloseSession(signers[i].session)
}
}
|