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Signed-off-by: Angelo De Caro <angelo.decaro@gmail.com> Signed-off-by: Alessandro Sorniotti <aso@zurich.ibm.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /* | ||
| Copyright IBM Corp. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package idemix | ||
|
|
||
| import ( | ||
| idemix "github.com/IBM/idemix/bccsp" | ||
| "github.com/IBM/idemix/bccsp/keystore" | ||
| idemix2 "github.com/IBM/idemix/bccsp/schemes/dlog/crypto" | ||
| "github.com/IBM/idemix/bccsp/schemes/dlog/crypto/translator/amcl" | ||
| bccsp "github.com/IBM/idemix/bccsp/types" | ||
| math "github.com/IBM/mathlib" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| // NewBCCSP returns an instance of the idemix BCCSP for the given curve | ||
| func NewBCCSP(curveID math.CurveID) (bccsp.BCCSP, error) { | ||
| curve, tr, err := GetCurveAndTranslator(curveID) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| cryptoProvider, err := idemix.New(&keystore.Dummy{}, curve, tr, true) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "failed getting crypto provider") | ||
| } | ||
| return cryptoProvider, nil | ||
| } | ||
|
|
||
| // NewKSVBCCSP returns an instance of the idemix BCCSP for the given curve and kvsStore | ||
| func NewKSVBCCSP(kvsStore keystore.KVS, curveID math.CurveID, aries bool) (bccsp.BCCSP, error) { | ||
| curve, tr, err := GetCurveAndTranslator(curveID) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| keyStore := &keystore.KVSStore{ | ||
| KVS: kvsStore, | ||
| Curve: curve, | ||
| Translator: tr, | ||
| } | ||
|
|
||
| var cryptoProvider bccsp.BCCSP | ||
| if aries { | ||
| cryptoProvider, err = idemix.NewAries(keyStore, curve, tr, true) | ||
| } else { | ||
| cryptoProvider, err = idemix.New(keyStore, curve, tr, true) | ||
| } | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "failed getting crypto provider") | ||
| } | ||
|
|
||
| return cryptoProvider, nil | ||
| } | ||
|
|
||
| func GetCurveAndTranslator(curveID math.CurveID) (*math.Curve, idemix2.Translator, error) { | ||
| curve := math.Curves[curveID] | ||
| var tr idemix2.Translator | ||
| switch curveID { | ||
| case math.BN254: | ||
| tr = &amcl.Gurvy{C: curve} | ||
| case math.BLS12_377_GURVY: | ||
| tr = &amcl.Gurvy{C: curve} | ||
| case math.FP256BN_AMCL: | ||
| tr = &amcl.Fp256bn{C: curve} | ||
| case math.FP256BN_AMCL_MIRACL: | ||
| tr = &amcl.Fp256bnMiracl{C: curve} | ||
| case math.BLS12_381_BBS: | ||
| tr = &amcl.Gurvy{C: curve} | ||
| default: | ||
| return nil, nil, errors.Errorf("unsupported curve ID: %d", curveID) | ||
| } | ||
| return curve, tr, nil | ||
| } |
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