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118 lines
2.6 KiB
118 lines
2.6 KiB
package ecc
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import (
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"github.com/ProtonMail/go-crypto/openpgp/internal/encoding"
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"crypto/elliptic"
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"bytes"
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"github.com/ProtonMail/go-crypto/bitcurves"
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"github.com/ProtonMail/go-crypto/brainpool"
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)
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type SignatureAlgorithm uint8
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const (
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ECDSA SignatureAlgorithm = 1
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EdDSA SignatureAlgorithm = 2
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)
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type CurveInfo struct {
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Name string
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Oid *encoding.OID
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Curve elliptic.Curve
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SigAlgorithm SignatureAlgorithm
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CurveType CurveType
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}
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var curves = []CurveInfo{
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{
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Name: "NIST curve P-256",
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Oid: encoding.NewOID([]byte{0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07}),
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Curve: elliptic.P256(),
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CurveType: NISTCurve,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "NIST curve P-384",
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Oid: encoding.NewOID([]byte{0x2B, 0x81, 0x04, 0x00, 0x22}),
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Curve: elliptic.P384(),
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CurveType: NISTCurve,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "NIST curve P-521",
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Oid: encoding.NewOID([]byte{0x2B, 0x81, 0x04, 0x00, 0x23}),
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Curve: elliptic.P521(),
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CurveType: NISTCurve,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "SecP256k1",
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Oid: encoding.NewOID([]byte{0x2B, 0x81, 0x04, 0x00, 0x0A}),
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Curve: bitcurves.S256(),
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CurveType: BitCurve,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "Curve25519",
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Oid: encoding.NewOID([]byte{0x2B, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01}),
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Curve: elliptic.P256(),// filler
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CurveType: Curve25519,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "Ed25519",
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Oid: encoding.NewOID([]byte{0x2B, 0x06, 0x01, 0x04, 0x01, 0xDA, 0x47, 0x0F, 0x01}),
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Curve: elliptic.P256(), // filler
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CurveType: NISTCurve,
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SigAlgorithm: EdDSA,
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},
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{
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Name: "Brainpool P256r1",
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Oid: encoding.NewOID([]byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x07}),
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Curve: brainpool.P256r1(),
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CurveType: BrainpoolCurve,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "BrainpoolP384r1",
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Oid: encoding.NewOID([]byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0B}),
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Curve: brainpool.P384r1(),
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CurveType: BrainpoolCurve,
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SigAlgorithm: ECDSA,
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},
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{
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Name: "BrainpoolP512r1",
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Oid: encoding.NewOID([]byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0D}),
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Curve: brainpool.P512r1(),
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CurveType: BrainpoolCurve,
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SigAlgorithm: ECDSA,
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},
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}
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func FindByCurve(curve elliptic.Curve) *CurveInfo {
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for _, curveInfo := range curves {
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if curveInfo.Curve == curve {
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return &curveInfo
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}
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}
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return nil
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}
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func FindByOid(oid encoding.Field) *CurveInfo {
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var rawBytes = oid.Bytes()
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for _, curveInfo := range curves {
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if bytes.Equal(curveInfo.Oid.Bytes(), rawBytes) {
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return &curveInfo
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}
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}
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return nil
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}
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func FindByName(name string) *CurveInfo {
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for _, curveInfo := range curves {
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if curveInfo.Name == name {
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return &curveInfo
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}
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}
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return nil
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} |