yaole
49 lines
1007 B
Go
49 lines
1007 B
Go
package subtle
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"crypto/sha256"
|
|
"crypto/sha512"
|
|
"errors"
|
|
"hash"
|
|
|
|
"xdx.jelly/xgcl/sm/sm3"
|
|
)
|
|
|
|
// hashDigestSize maps hash algorithms to their digest size in bytes.
|
|
var hashDigestSize = map[string]uint32{
|
|
"SHA1": uint32(20),
|
|
"SHA256": uint32(32),
|
|
"SHA384": uint32(48),
|
|
"SHA512": uint32(64),
|
|
"SM3": uint32(32),
|
|
}
|
|
var errNilHashFunc = errors.New("nil hash function")
|
|
|
|
// GetHashDigestSize returns the digest size of the specified hash algorithm.
|
|
func GetHashDigestSize(hash string) (uint32, error) {
|
|
digestSize, ok := hashDigestSize[hash]
|
|
if !ok {
|
|
return 0, errors.New("invalid hash algorithm")
|
|
}
|
|
return digestSize, nil
|
|
}
|
|
|
|
// GetHashFunc returns the corresponding hash function of the given hash name.
|
|
func GetHashFunc(hash string) func() hash.Hash {
|
|
switch hash {
|
|
case "SHA1":
|
|
return sha1.New
|
|
case "SHA256":
|
|
return sha256.New
|
|
case "SHA384":
|
|
return sha512.New384
|
|
case "SHA512":
|
|
return sha512.New
|
|
case "SM3":
|
|
return sm3.New
|
|
default:
|
|
return nil
|
|
}
|
|
}
|