arnaucube/go-circom-prover-verifier
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Add proof parsers to string (decimal & hex)

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Also adds ProofToSmartContractFormat, which returns a ProofString as the
proof.B elements swap is not a valid point for the bn256.G2 format.

Also unexports internal structs and methods of the prover package.
Also apply golint.
This commit is contained in:
arnaucube
2020-05-06 14:18:07 +02:00
parent 6ec118d4e2
commit 0f48cfa2a5
6 changed files with 268 additions and 178 deletions
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78
parsers/parsers.go
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@@ -467,8 +467,35 @@ func stringToG2(h [][]string) (*bn256.G2, error) {
return p, err
}
// ProofToJson outputs the Proof i Json format
func ProofToJson(p *types.Proof) ([]byte, error) {
// ProofStringToSmartContractFormat converts the ProofString to a ProofString in the SmartContract format in a ProofString structure
func ProofStringToSmartContractFormat(s ProofString) ProofString {
var rs ProofString
rs.A = make([]string, 2)
rs.B = make([][]string, 2)
rs.B[0] = make([]string, 2)
rs.B[1] = make([]string, 2)
rs.C = make([]string, 2)
rs.A[0] = s.A[0]
rs.A[1] = s.A[1]
rs.B[0][0] = s.B[0][1]
rs.B[0][1] = s.B[0][0]
rs.B[1][0] = s.B[1][1]
rs.B[1][1] = s.B[1][0]
rs.C[0] = s.C[0]
rs.C[1] = s.C[1]
rs.Protocol = s.Protocol
return rs
}
// ProofToSmartContractFormat converts the *types.Proof to a ProofString in the SmartContract format in a ProofString structure
func ProofToSmartContractFormat(p *types.Proof) ProofString {
s := ProofToString(p)
return ProofStringToSmartContractFormat(s)
}
// ProofToString converts the Proof to ProofString
func ProofToString(p *types.Proof) ProofString {
var ps ProofString
ps.A = make([]string, 3)
ps.B = make([][]string, 3)
@@ -497,10 +524,55 @@ func ProofToJson(p *types.Proof) ([]byte, error) {
ps.Protocol = "groth"
return ps
}
// ProofToJson outputs the Proof i Json format
func ProofToJson(p *types.Proof) ([]byte, error) {
ps := ProofToString(p)
return json.Marshal(ps)
}
// ParseWitness parses binary file representation of the Witness into the Witness struct
// ProofToHex converts the Proof to ProofString with hexadecimal strings
func ProofToHex(p *types.Proof) ProofString {
var ps ProofString
ps.A = make([]string, 3)
ps.B = make([][]string, 3)
ps.B[0] = make([]string, 2)
ps.B[1] = make([]string, 2)
ps.B[2] = make([]string, 2)
ps.C = make([]string, 3)
a := p.A.Marshal()
ps.A[0] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(a[:32]).Bytes())
ps.A[1] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(a[32:64]).Bytes())
ps.A[2] = "1"
b := p.B.Marshal()
ps.B[0][1] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(b[:32]).Bytes())
ps.B[0][0] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(b[32:64]).Bytes())
ps.B[1][1] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(b[64:96]).Bytes())
ps.B[1][0] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(b[96:128]).Bytes())
ps.B[2][0] = "1"
ps.B[2][1] = "0"
c := p.C.Marshal()
ps.C[0] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(c[:32]).Bytes())
ps.C[1] = "0x" + hex.EncodeToString(new(big.Int).SetBytes(c[32:64]).Bytes())
ps.C[2] = "1"
ps.Protocol = "groth"
return ps
}
// ProofToJsonHex outputs the Proof i Json format with hexadecimal strings
func ProofToJsonHex(p *types.Proof) ([]byte, error) {
ps := ProofToHex(p)
return json.Marshal(ps)
}
// ParseWitnessBin parses binary file representation of the Witness into the Witness struct
func ParseWitnessBin(f *os.File) (types.Witness, error) {
var w types.Witness
r := bufio.NewReader(f)