mirror of
https://github.com/charlienet/go-mixed.git
synced 2025-07-18 00:22:41 +08:00
89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
package hmac
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import (
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"bytes"
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"crypto/hmac"
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"crypto/md5"
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"crypto/sha1"
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"crypto/sha256"
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"crypto/sha512"
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"errors"
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"hash"
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"strings"
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"github.com/charlienet/go-mixed/bytesconv"
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"github.com/charlienet/go-mixed/crypto"
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"github.com/tjfoc/gmsm/sm3"
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)
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var _ crypto.Signer = &hashComparer{}
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type HMacFunc func(key, msg []byte) bytesconv.BytesResult
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var hmacFuncs = map[string]HMacFunc{
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"HmacMD5": Md5,
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"HmacSHA1": Sha1,
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"HmacSHA224": Sha224,
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"HmacSHA256": Sha256,
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"HmacSHA384": Sha384,
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"HmacSHA512": Sha512,
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"HmacSM3": Sm3,
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}
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type hashComparer struct {
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key []byte
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hashFunc HMacFunc
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}
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func New(fname string, key []byte) (*hashComparer, error) {
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f, err := ByName(fname)
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if err != nil {
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return nil, err
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}
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return &hashComparer{
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key: key,
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hashFunc: f,
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}, nil
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}
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func (c *hashComparer) Sign(msg []byte) ([]byte, error) {
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ret := c.hashFunc(c.key, msg)
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return ret.Bytes(), nil
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}
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func (c *hashComparer) Verify(msg, target []byte) bool {
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ret := c.hashFunc(c.key, msg)
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return bytes.Compare(ret.Bytes(), target) == 0
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}
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func ByName(name string) (HMacFunc, error) {
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if f, ok := hmacFuncs[strings.ToUpper(name)]; ok {
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return f, nil
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}
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return nil, errors.New("Unsupported hash functions")
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}
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func Md5(key, msg []byte) bytesconv.BytesResult { return sum(md5.New, key, msg) }
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func Sha1(key, msg []byte) bytesconv.BytesResult { return sum(sha1.New, key, msg) }
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func Sha224(key, msg []byte) bytesconv.BytesResult { return sum(sha256.New224, key, msg) }
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func Sha256(key, msg []byte) bytesconv.BytesResult { return sum(sha256.New, key, msg) }
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func Sha384(key, msg []byte) bytesconv.BytesResult { return sum(sha512.New384, key, msg) }
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func Sha512(key, msg []byte) bytesconv.BytesResult { return sum(sha512.New, key, msg) }
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func Sm3(key, msg []byte) bytesconv.BytesResult { return sum(sm3.New, key, msg) }
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func sum(f func() hash.Hash, msg, key []byte) bytesconv.BytesResult {
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h := hmac.New(f, key)
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h.Write(msg)
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return h.Sum(nil)
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}
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