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params.go
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params.go
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package sm3xmss
import (
"hash"
"errors"
"github.com/deatil/go-cryptobin/xmss"
"github.com/deatil/go-cryptobin/hash/sm3"
)
var oids = map[uint32]string{
0x00000001: "XMSS-SM3_10_256",
0x00000002: "XMSS-SM3_16_256",
0x00000003: "XMSS-SM3_20_256",
}
func GetOidByName(name string) (uint32, error) {
for oid, n := range oids {
if n == name {
return oid, nil
}
}
return 0, errors.New("sm3xmss: no support name")
}
func GetNameByOid(oid uint32) (string, error) {
for o, name := range oids {
if o == oid {
return name, nil
}
}
return "", errors.New("sm3xmss: no support oid")
}
func NewParamsWithOid(oid uint32) (*xmss.Params, error) {
var hasher func() hash.Hash
var n, w, h, d, paddingLen int
switch (oid) {
case 0x00000001,
0x00000002,
0x00000003:
hasher = sm3.New
default:
return nil, errors.New("sm3xmss: oid unsported")
}
switch (oid) {
case 0x00000001,
0x00000002,
0x00000003:
n = 32
paddingLen = 32
default:
return nil, errors.New("sm3xmss: oid unsported")
}
switch (oid) {
case 0x00000001:
h = 10
break
case 0x00000002:
h = 16
break
case 0x00000003:
h = 20
break
default:
return nil, errors.New("sm3xmss: oid unsported")
}
d = 1
w = 16
return xmss.NewParams(hasher, n, w, h, d, paddingLen), nil
}
func NewParamsWithName(name string) (*xmss.Params, error) {
oid, err := GetOidByName(name)
if err != nil {
return nil, err
}
return NewParamsWithOid(oid)
}