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|
package group_test
import (
"encoding/hex"
"encoding/json"
"fmt"
"os"
"path/filepath"
"testing"
"github.com/cloudflare/circl/group"
"github.com/cloudflare/circl/internal/test"
)
func TestHashToElement(t *testing.T) {
fileNames, err := filepath.Glob("./testdata/P*.json")
if err != nil {
t.Fatal(err)
}
for _, fileName := range fileNames {
f, err := os.Open(fileName)
if err != nil {
t.Fatal(err)
}
dec := json.NewDecoder(f)
var v vectorSuite
err = dec.Decode(&v)
if err != nil {
t.Fatal(err)
}
f.Close()
t.Run(v.Ciphersuite, func(t *testing.T) { testHashing(t, &v) })
}
}
func testHashing(t *testing.T, vs *vectorSuite) {
var G group.Group
switch vs.Ciphersuite[0:4] {
case "P256":
G = group.P256
case "P384":
G = group.P384
case "P521":
G = group.P521
default:
t.Fatal("non supported suite")
}
hashFunc := G.HashToElement
if !vs.RandomOracle {
hashFunc = G.HashToElementNonUniform
}
want := G.NewElement()
for i, v := range vs.Vectors {
got := hashFunc([]byte(v.Msg), []byte(vs.Dst))
err := want.UnmarshalBinary(v.P.toBytes())
if err != nil {
t.Fatal(err)
}
if !got.IsEqual(want) {
test.ReportError(t, got, want, i)
}
}
}
type vectorSuite struct {
L string `json:"L"`
Z string `json:"Z"`
Ciphersuite string `json:"ciphersuite"`
Curve string `json:"curve"`
Dst string `json:"dst"`
Expand string `json:"expand"`
Field struct {
M string `json:"m"`
P string `json:"p"`
} `json:"field"`
Hash string `json:"hash"`
K string `json:"k"`
Map struct {
Name string `json:"name"`
} `json:"map"`
RandomOracle bool `json:"randomOracle"`
Vectors []vector `json:"vectors"`
}
type point struct {
X string `json:"x"`
Y string `json:"y"`
}
func (p point) toBytes() []byte {
x, err := hex.DecodeString(p.X[2:])
if err != nil {
panic(err)
}
y, err := hex.DecodeString(p.Y[2:])
if err != nil {
panic(err)
}
return append(append([]byte{0x04}, x...), y...)
}
type vector struct {
P point `json:"P"`
Q0 point `json:"Q0,omitempty"`
Q1 point `json:"Q1,omitempty"`
Q point `json:"Q,omitempty"`
Msg string `json:"msg"`
U []string `json:"u"`
}
func BenchmarkHash(b *testing.B) {
for _, g := range allGroups {
name := g.(fmt.Stringer).String()
b.Run(name+"/HashToElement", func(b *testing.B) {
for i := 0; i < b.N; i++ {
g.HashToElement(nil, nil)
}
})
b.Run(name+"/HashToElementNonUniform", func(b *testing.B) {
for i := 0; i < b.N; i++ {
g.HashToElementNonUniform(nil, nil)
}
})
b.Run(name+"/HashToScalar", func(b *testing.B) {
for i := 0; i < b.N; i++ {
g.HashToScalar(nil, nil)
}
})
}
}
|
