/
proof.go
89 lines (79 loc) · 2.26 KB
/
proof.go
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/*
* provendb-verify
* Copyright (C) 2019 Southbank Software Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* @Author: guiguan
* @Date: 2018-08-17T10:48:15+10:00
* @Last modified by: guiguan
* @Last modified time: 2019-11-14T14:59:15+11:00
*/
package proof
import (
"context"
"fmt"
"io"
"github.com/SouthbankSoftware/provendb-verify/pkg/proof/anchor"
"github.com/SouthbankSoftware/provendb-verify/pkg/proof/binary"
"github.com/SouthbankSoftware/provendb-verify/pkg/proof/eval"
"github.com/SouthbankSoftware/provendb-verify/pkg/proof/schema"
"github.com/SouthbankSoftware/provendb-verify/pkg/proof/status"
)
// Verify verifies a given Chainpoint Proof in either base64 binary string or JSON interface{}
func Verify(ctx context.Context, rawProof interface{}) (
st status.VerificationStatus, evaledPf map[string]interface{}, er error) {
var proof interface{}
switch p := rawProof.(type) {
case io.Reader:
var pf interface{}
err := binary.Base642Proof(p, &pf)
if err != nil {
er = err
return
}
proof = pf
case map[string]interface{}:
proof = p
default:
er = fmt.Errorf("unsupported Chainpoint Proof format %T", p)
return
}
err := schema.Verify(proof)
if err != nil {
st = status.VerificationStatusFalsified
er = err
return
}
evaluatedProof, err := eval.Eval(proof)
if err != nil {
st = status.VerificationStatusFalsified
er = err
return
}
err = anchor.Verify(ctx, evaluatedProof)
if err != nil {
if se, ok := err.(*status.VerificationStatusError); ok {
st = se.Status
er = se.Err
return
}
er = err
return
}
st = status.VerificationStatusVerified
evaledPf = evaluatedProof
return
}