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|
package cose
import (
"crypto"
"crypto/rand"
"crypto/rsa"
"encoding/hex"
"io"
"reflect"
"testing"
)
func signTestData(t *testing.T, alg Algorithm, key crypto.Signer) (content, sig []byte) {
signer, err := NewSigner(alg, key)
if err != nil {
t.Fatalf("NewSigner() error = %v", err)
}
content = []byte("hello world")
sig, err = signer.Sign(rand.Reader, content)
if err != nil {
t.Fatalf("Sign() error = %v", err)
}
return
}
func TestNewSigner(t *testing.T) {
// generate ecdsa key
ecdsaKey := generateTestECDSAKey(t)
ecdsaWrappedKey := struct {
crypto.Signer
}{
Signer: ecdsaKey,
}
// generate ed25519 key
_, ed25519Key := generateTestEd25519Key(t)
// generate rsa keys
rsaKey := generateTestRSAKey(t)
rsaKeyLowEntropy, err := rsa.GenerateKey(rand.Reader, 1024)
if err != nil {
t.Fatalf("rsa.GenerateKey() error = %v", err)
}
// run tests
tests := []struct {
name string
alg Algorithm
key crypto.Signer
want Signer
wantErr string
}{
{
name: "ecdsa key signer",
alg: AlgorithmES256,
key: ecdsaKey,
want: &ecdsaKeySigner{
alg: AlgorithmES256,
key: ecdsaKey,
},
},
{
name: "ecdsa crypto signer",
alg: AlgorithmES256,
key: ecdsaWrappedKey,
want: &ecdsaCryptoSigner{
alg: AlgorithmES256,
key: &ecdsaKey.PublicKey,
signer: ecdsaWrappedKey,
},
},
{
name: "ecdsa key mismatch",
alg: AlgorithmES256,
key: rsaKey,
wantErr: "ES256: invalid public key",
},
{
name: "ed25519 signer",
alg: AlgorithmEdDSA,
key: ed25519Key,
want: &ed25519Signer{
key: ed25519Key,
},
},
{
name: "ed25519 key mismatch",
alg: AlgorithmEdDSA,
key: rsaKey,
wantErr: "EdDSA: invalid public key",
},
{
name: "rsa signer",
alg: AlgorithmPS256,
key: rsaKey,
want: &rsaSigner{
alg: AlgorithmPS256,
key: rsaKey,
},
},
{
name: "rsa key mismatch",
alg: AlgorithmPS256,
key: ecdsaKey,
wantErr: "PS256: invalid public key",
},
{
name: "rsa key under minimum entropy",
alg: AlgorithmPS256,
key: rsaKeyLowEntropy,
wantErr: "RSA key must be at least 2048 bits long",
},
{
name: "unsupported rsa signing algorithm",
alg: AlgorithmRS256,
wantErr: "can't create new Signer for RS256: no built-in implementation available: algorithm not supported",
},
{
name: "reserved algorithm",
alg: AlgorithmReserved,
wantErr: "can't create new Signer for Reserved: can't be implemented: algorithm not supported",
},
{
name: "unassigned algorithm",
alg: -1,
wantErr: "can't create new Signer for Algorithm(-1): unknown algorithm: algorithm not supported",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := NewSigner(tt.alg, tt.key)
if err != nil && (err.Error() != tt.wantErr) {
t.Errorf("NewSigner() error = %v, wantErr %v", err, tt.wantErr)
return
} else if err == nil && (tt.wantErr != "") {
t.Errorf("NewSigner() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("NewSigner() = %v, want %v", got, tt.want)
}
})
}
}
const algorithmMock Algorithm = -0x6d6f636b
type mockSigner struct {
t *testing.T
m map[string]string
}
func newMockSigner(t *testing.T) *mockSigner {
return &mockSigner{
t: t,
m: make(map[string]string),
}
}
func (m *mockSigner) setup(content, sig []byte) {
m.m[hex.EncodeToString(content)] = hex.EncodeToString(sig) // deep copy
}
func (m *mockSigner) Algorithm() Algorithm {
return algorithmMock
}
func (m *mockSigner) Sign(rand io.Reader, content []byte) ([]byte, error) {
sigHex, ok := m.m[hex.EncodeToString(content)]
if !ok {
m.t.Fatalf("mockSigner: not setup: %v", content)
}
sig, err := hex.DecodeString(sigHex)
if err != nil {
m.t.Fatalf("mockSigner: failed to decode: %v", sigHex)
}
return sig, nil
}
|
