/
conf.go
67 lines (63 loc) · 1.52 KB
/
conf.go
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package gm
import (
"crypto/elliptic"
"crypto/sha256"
"crypto/sha512"
"errors"
"fmt"
"hash"
//todo:国密 gosdk:sm3
"github.com/littlegirlpppp/fabric-sdk-go-gm/third_party/github.com/tjfoc/gmsm/sm3"
)
//todo:国密 gosdk:增加gm
type config struct {
ellipticCurve elliptic.Curve
hashFunction func() hash.Hash
aesBitLength int
rsaBitLength int
}
func (conf *config) setSecurityLevel(securityLevel int, hashFamily string) (err error) {
switch hashFamily {
case "SHA2":
err = conf.setSecurityLevelSha2(securityLevel)
case "GMSM3":
err = conf.setSecurityLevelGMSM3(securityLevel)
default:
err = errors.New("does not exist hashFamily")
}
return
}
func (conf *config)setSecurityLevelSha2(level int) (err error) {
switch level {
case 256:
conf.ellipticCurve = elliptic.P256()
conf.hashFunction = sha256.New
conf.rsaBitLength = 2048
conf.aesBitLength = 32
case 384:
conf.ellipticCurve = elliptic.P384()
conf.hashFunction = sha512.New384
conf.rsaBitLength = 3072
conf.aesBitLength = 32
default:
err = fmt.Errorf("Security level not supported [%d]", level)
}
return
}
func (conf *config) setSecurityLevelGMSM3(level int) (err error) {
switch level {
case 256:
conf.ellipticCurve = elliptic.P256()
conf.hashFunction = sm3.New
conf.rsaBitLength = 2048
conf.aesBitLength = 32
case 384:
conf.ellipticCurve = elliptic.P384()
conf.hashFunction = sm3.New
conf.rsaBitLength = 3072
conf.aesBitLength = 32
default:
err = fmt.Errorf("Security level not supported [%d]", level)
}
return
}