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Merge pull request #45 from hyperledger-labs/encrypt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| // Copyright © 2024 Kaleido, Inc. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package storage | ||
|
|
||
| import ( | ||
| "math/big" | ||
| "testing" | ||
|
|
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| "github.com/hyperledger-labs/zeto/go-sdk/pkg/sparse-merkle-tree/core" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
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| type mockNodeIndex struct{} | ||
|
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| func (ni *mockNodeIndex) BigInt() *big.Int { return big.NewInt(0) } | ||
| func (ni *mockNodeIndex) Hex() string { return "0" } | ||
| func (ni *mockNodeIndex) IsZero() bool { return true } | ||
| func (ni *mockNodeIndex) Equal(n core.NodeIndex) bool { return true } | ||
| func (ni *mockNodeIndex) IsBitOn(uint) bool { return false } | ||
| func (ni *mockNodeIndex) ToPath(int) []bool { return []bool{true, false} } | ||
|
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| type mockNode struct { | ||
| idx core.NodeIndex | ||
| ref core.NodeIndex | ||
| lc core.NodeIndex | ||
| rc core.NodeIndex | ||
| } | ||
|
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| func (n *mockNode) Type() core.NodeType { return core.NodeTypeLeaf } | ||
| func (n *mockNode) Index() core.NodeIndex { return n.idx } | ||
| func (n *mockNode) Ref() core.NodeIndex { return n.ref } | ||
| func (n *mockNode) Value() core.Indexable { return nil } | ||
| func (n *mockNode) LeftChild() core.NodeIndex { return n.lc } | ||
| func (n *mockNode) RightChild() core.NodeIndex { return n.rc } | ||
|
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| func TestNewMemoryStorage(t *testing.T) { | ||
| s := NewMemoryStorage() | ||
| assert.Nil(t, s.root) | ||
| assert.NotNil(t, s.nodes) | ||
| assert.Empty(t, s.nodes) | ||
|
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| _, err := s.GetRootNodeIndex() | ||
| assert.Equal(t, ErrNotFound, err) | ||
|
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| err = s.UpsertRootNodeIndex(&mockNodeIndex{}) | ||
| assert.NoError(t, err) | ||
|
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| ni, err := s.GetRootNodeIndex() | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, ni) | ||
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| idx1 := &mockNodeIndex{} | ||
| _, err = s.GetNode(idx1) | ||
| assert.Equal(t, ErrNotFound, err) | ||
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| idx2 := &mockNodeIndex{} | ||
| n1 := &mockNode{idx: idx1, ref: idx2} | ||
| err = s.InsertNode(n1) | ||
| assert.NoError(t, err) | ||
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| found, err := s.GetNode(idx1) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, found) | ||
| assert.Equal(t, n1, found) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // Copyright © 2024 Kaleido, Inc. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| package utxo | ||
|
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| import ( | ||
| "crypto/rand" | ||
| "fmt" | ||
| "math/big" | ||
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| "github.com/iden3/go-iden3-crypto/constants" | ||
| ) | ||
|
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| // NewSalt generates a new random salt in the range of [0, MAX) where MAX is the order of the BabyJub curve. | ||
| // This ensures that the salt is a valid scalar for the curve. | ||
| func NewSalt() *big.Int { | ||
| // ensure that the salt fits inside the field of SNARKs | ||
| max := constants.Q | ||
| return newRandomNumberInRange(max) | ||
| } | ||
|
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| const TWO_POW_128 = "340282366920938463463374607431768211456" | ||
|
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| func NewEncryptionNonce() *big.Int { | ||
| // per https://drive.google.com/file/d/1EVrP3DzoGbmzkRmYnyEDcIQcXVU7GlOd/view | ||
| // the encrpition nonce should be in the range [0, 2^128) | ||
| max, _ := new(big.Int).SetString(TWO_POW_128, 10) | ||
| return newRandomNumberInRange(max) | ||
| } | ||
|
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| func newRandomNumberInRange(max *big.Int) *big.Int { | ||
| // ensure that the salt fits inside the field of SNARKs | ||
| maxRounds := 10 | ||
| var e error | ||
| for rounds := 0; rounds < maxRounds; rounds++ { | ||
| randInt, err := rand.Int(rand.Reader, max) | ||
| if err == nil { | ||
| return randInt | ||
| } | ||
| e = err | ||
| } | ||
| panic(fmt.Sprintf("failed to generate a random number in [0, %d) after trying %d times: %v", max, maxRounds, e)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| // Copyright © 2024 Kaleido, Inc. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package utxo | ||
|
|
||
| import ( | ||
| "math/big" | ||
| "testing" | ||
|
|
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| "github.com/iden3/go-iden3-crypto/constants" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
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| func TestNewSalt(t *testing.T) { | ||
| salt := NewSalt() | ||
| assert.NotNil(t, salt) | ||
| max := constants.Q | ||
| assert.Less(t, salt.Cmp(max), 0) | ||
| } | ||
|
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| func TestNewEncryptionNonce(t *testing.T) { | ||
| nonce := NewEncryptionNonce() | ||
| assert.NotNil(t, nonce) | ||
| max, _ := new(big.Int).SetString("340282366920938463463374607431768211456", 10) | ||
| assert.Less(t, nonce.Cmp(max), 0) | ||
| } |
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