Poseidon Sponge Hash with different frame sizes (#52)

* Poseidon Sponge Hash with different frame sizes
* Update deps. Bump go version
* Update & fix linter.
* Refactor a bit.
* Reduce gc pressure

.github/workflows/lint.yml

@@ -1,16 +1,18 @@
 name: Lint
-on: [ push, pull_request ]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - name: Install Go
-        uses: actions/setup-go@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
         with:
-          go-version: 1.16.x
-      - name: Checkout code
-        uses: actions/checkout@v2
-      - name: Lint
-        run: |
-          curl -sSfL https://github.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.30.0
-          $(go env GOPATH)/bin/golangci-lint run --timeout=5m -c .golangci.yml
+          go-version: 1.20.x
+      - uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.51.1

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [ 1.16.x, 1.17.x ]
+        go-version: [ 1.18.x, 1.19.x, 1.20.x ]
         goarch: [ "amd64", "386" ]
     runs-on: ubuntu-latest
     steps:

.golangci.yml

@@ -1,17 +1,77 @@
-issues:
-        max-same-issues: 0
-        exclude-use-default: false
+service:
+  golangci-lint-version: 1.51.x
+
+run:
+  timeout: 2m
+  skip-dirs:
+    - vendor
+
+linters-settings:
+  govet:
+    check-shadowing: true
+  revive:
+    min-confidence: 0.1
+    rules:
+      - name: package-comments
+        disabled: true
+  maligned:
+    suggest-new: true
+  goconst:
+    min-len: 2
+    min-occurrences: 2
+  misspell:
+    locale: US
+  lll:
+    line-length: 140
+  gocritic:
+    enabled-tags:
+      - performance
+      - style
+      - experimental
+    disabled-checks:
+      - hugeParam
+
 linters:
-        enable:
-        - whitespace
+  enable:
+    - bodyclose
+    - megacheck
+    - revive
+    - govet
+    - unconvert
+    - megacheck
+    - gas
+    - gocyclo
+    - dupl
+    - misspell
+    - unparam
+    - typecheck
+    - ineffassign
+    - stylecheck
+    - exportloopref
+    - nakedret
+    - gosimple
+    - prealloc
+    - unused
+
+    ## format - fill free to fix
+#    - errcheck
+#    - gofmt
+#    - goimports
+  fast: false
+  disable-all: true
+
+issues:
+  exclude-rules:
+#    - Fix and remove
+    - text: "at least one file in a package should have a package comment"
+      linters:
+        - stylecheck
+  #    - Fix and remove
+    - text: "should have a package comment, unless it's in another file for this package"
+      linters:
+        - revive
+    - path: _test\.go
+      linters:
         - gosec
-        - gci
-        - misspell
-        - gomnd
-        - gofmt
-        - goimports
-        - lll
-        - golint
-linters-settings:
-        lll:
-                line-length: 100
+        - dupl
+  exclude-use-default: false

babyjub/babyjub.go

@@ -87,7 +87,7 @@ func (p *PointProjective) Affine() *Point {
 
 // Add computes the addition of two points in projective coordinates
 // representation
-func (p *PointProjective) Add(q *PointProjective, o *PointProjective) *PointProjective {
+func (p *PointProjective) Add(q, o *PointProjective) *PointProjective {
 	// add-2008-bbjlp
 	// https://hyperelliptic.org/EFD/g1p/auto-twisted-projective.html#doubling-dbl-2008-bbjlp
 	a := ff.NewElement().Mul(q.Z, o.Z)
@@ -209,7 +209,7 @@ func PointCoordSign(c *big.Int) bool {
 func PackSignY(sign bool, y *big.Int) [32]byte {
 	leBuf := utils.BigIntLEBytes(y)
 	if sign {
-		leBuf[31] = leBuf[31] | 0x80 //nolint:gomnd
+		leBuf[31] |= 0x80 //nolint:gomnd
 	}
 	return leBuf
 }
@@ -225,7 +225,7 @@ func UnpackSignY(leBuf [32]byte) (bool, *big.Int) {
 	y := big.NewInt(0)
 	if (leBuf[31] & 0x80) != 0x00 { //nolint:gomnd
 		sign = true
-		leBuf[31] = leBuf[31] & 0x7F //nolint:gomnd
+		leBuf[31] &= 0x7F //nolint:gomnd
 	}
 	utils.SetBigIntFromLEBytes(y, leBuf[:])
 	return sign, y

babyjub/eddsa.go

@@ -1,4 +1,5 @@
 // Package babyjub eddsa implements the EdDSA over the BabyJubJub curve
+//
 //nolint:gomnd
 package babyjub
 
@@ -16,9 +17,9 @@ import (
 // pruneBuffer prunes the buffer during key generation according to RFC 8032.
 // https://tools.ietf.org/html/rfc8032#page-13
 func pruneBuffer(buf *[32]byte) *[32]byte {
-	buf[0] = buf[0] & 0xF8
-	buf[31] = buf[31] & 0x7F
-	buf[31] = buf[31] | 0x40
+	buf[0] &= 0xF8
+	buf[31] &= 0x7F
+	buf[31] |= 0x40
 	return buf
 }
 
@@ -210,7 +211,7 @@ func (sComp *SignatureComp) Scan(src interface{}) error {
 	if len(srcB) != 64 {
 		return fmt.Errorf("can't scan []byte of len %d into Signature, want %d", len(srcB), 64)
 	}
-	copy(sComp[:], srcB[:])
+	copy(sComp[:], srcB)
 	return nil
 }
 
@@ -229,7 +230,7 @@ func (s *Signature) Scan(src interface{}) error {
 		return fmt.Errorf("can't scan []byte of len %d into Signature, want %d", len(srcB), 64)
 	}
 	buf := [64]byte{}
-	copy(buf[:], srcB[:])
+	copy(buf[:], srcB)
 	_, err := s.Decompress(buf)
 	return err
 }

babyjub/helpers.go

@@ -12,7 +12,7 @@ import (
 // the original blake from the SHA3 competition and not the new blake2 version.
 func Blake512(m []byte) []byte {
 	h := blake512.New()
-	_, err := h.Write(m[:])
+	_, err := h.Write(m)
 	if err != nil {
 		panic(err)
 	}

constants/constants.go

@@ -1,31 +1,19 @@
 package constants
 
 import (
-	"fmt"
 	"math/big"
 )
 
+const qString = "21888242871839275222246405745257275088548364400416034343698204186575808495617"
+
 // Q is the order of the integer field (Zq) that fits inside the SNARK.
-var Q *big.Int
+var Q, _ = new(big.Int).SetString(qString, 10)
 
 // Zero is 0.
-var Zero *big.Int
+var Zero = big.NewInt(0)
 
 // One is 1.
-var One *big.Int
+var One = big.NewInt(1)
 
 // MinusOne is -1.
-var MinusOne *big.Int
-
-func init() {
-	Zero = big.NewInt(0)
-	One = big.NewInt(1)
-	MinusOne = big.NewInt(-1)
-
-	qString := "21888242871839275222246405745257275088548364400416034343698204186575808495617"
-	var ok bool
-	Q, ok = new(big.Int).SetString(qString, 10) //nolint:gomnd
-	if !ok {
-		panic(fmt.Sprintf("Bad base 10 string %s", qString))
-	}
-}
+var MinusOne = big.NewInt(-1)

go.mod

@@ -1,14 +1,17 @@
 module github.com/iden3/go-iden3-crypto
 
-go 1.16
+go 1.18
 
 require (
 	github.com/dchest/blake512 v1.0.0
-	github.com/stretchr/testify v1.7.0
-	golang.org/x/crypto v0.0.0-20211117183948-ae814b36b871
-	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
-	github.com/davecgh/go-spew v1.1.0 // indirect
-	github.com/leanovate/gopter v0.2.9 // indirect
+	github.com/leanovate/gopter v0.2.9
+	github.com/stretchr/testify v1.8.2
+	golang.org/x/crypto v0.7.0
+	golang.org/x/sys v0.6.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,27 +1,25 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dchest/blake512 v1.0.0 h1:oDFEQFIqFSeuA34xLtXZ/rWxCXdSjirjzPhey5EUvmA=
 github.com/dchest/blake512 v1.0.0/go.mod h1:FV1x7xPPLWukZlpDpWQ88rF/SFwZ5qbskrzhLMB92JI=
 github.com/leanovate/gopter v0.2.9 h1:fQjYxZaynp97ozCzfOyOuAGOU4aU/z37zf/tOujFk7c=
 github.com/leanovate/gopter v0.2.9/go.mod h1:U2L/78B+KVFIx2VmW6onHJQzXtFb+p5y3y2Sh+Jxxv8=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-golang.org/x/crypto v0.0.0-20211117183948-ae814b36b871 h1:/pEO3GD/ABYAjuakUS6xSEmmlyVS4kxBNkeA9tLJiTI=
-golang.org/x/crypto v0.0.0-20211117183948-ae814b36b871/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
-golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+golang.org/x/crypto v0.7.0 h1:AvwMYaRytfdeVt3u6mLaxYtErKYjxA2OXjJ1HHq6t3A=
+golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
+golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

goldenposeidon/constants.go

@@ -3,10 +3,14 @@ package poseidon
 import "github.com/iden3/go-iden3-crypto/ffg"
 
 const (
-	NROUNDSF = 8  //nolint:golint
-	NROUNDSP = 22 //nolint:golint
-	CAPLEN   = 4  //nolint:golint
-	mLen     = 12
+	// NROUNDSF const from original paper
+	NROUNDSF = 8
+	// NROUNDSP const from original paper
+	NROUNDSP = 22
+	// CAPLEN const
+	CAPLEN = 4
+	// mLen const
+	mLen = 12
 )
 
 var (

goldenposeidon/poseidon.go

@@ -10,9 +10,11 @@ func zero() *ffg.Element {
 	return ffg.NewElement()
 }
 
+var big7 = big.NewInt(7)
+
 // exp7 performs x^7 mod p
 func exp7(a *ffg.Element) {
-	a.Exp(*a, big.NewInt(7)) //nolint:gomnd
+	a.Exp(*a, big7)
 }
 
 // exp7state perform exp7 for whole state

goldenposeidon/poseidon_test.go

@@ -1,10 +1,8 @@
 package poseidon
 
 import (
-	"math/big"
 	"testing"
 
-	"github.com/iden3/go-iden3-crypto/poseidon"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -99,32 +97,11 @@ func TestPoseidonHashCompare(t *testing.T) {
 	)
 }
 
-func BenchmarkPoseidonHash12Inputs(b *testing.B) {
-	bigArray12 := []*big.Int{
-		big.NewInt(1),
-		big.NewInt(2),
-		big.NewInt(3),
-		big.NewInt(4),
-		big.NewInt(5),
-		big.NewInt(6),
-		big.NewInt(7),
-		big.NewInt(8),
-		big.NewInt(9),
-		big.NewInt(10),
-		big.NewInt(11),
-		big.NewInt(12),
-	}
-
-	for i := 0; i < b.N; i++ {
-		poseidon.Hash(bigArray12) //nolint:errcheck,gosec
-	}
-}
-
 func BenchmarkNeptuneHash(b *testing.B) {
 	inp := [NROUNDSF]uint64{1, 2, 3, 4, 5, 6, 7, 8}
-	cap := [CAPLEN]uint64{10, 11, 12, 13}
+	_cap := [CAPLEN]uint64{10, 11, 12, 13}
 
 	for i := 0; i < b.N; i++ {
-		Hash(inp, cap) //nolint:errcheck,gosec
+		_, _ = Hash(inp, _cap)
 	}
 }