crypto: implement Hash.String

Fixes #33430

Change-Id: I323323b3136dd7b408005c3bb5ea05e3b566bd38
Reviewed-on: https://go-review.googlesource.com/c/go/+/224937
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

diff --git a/src/crypto/crypto.go b/src/crypto/crypto.go
index b4d6cdcab4e9b29144a06864172dc8ebc0f7242b..49484812a6fc849a9014bb6da1008b1ccc5f2a5f 100644 (file)
--- a/src/crypto/crypto.go
+++ b/src/crypto/crypto.go
@@ -20,6 +20,51 @@ func (h Hash) HashFunc() Hash {
        return h
 }
 
+func (h Hash) String() string {
+       switch h {
+       case MD4:
+               return "MD4"
+       case MD5:
+               return "MD5"
+       case SHA1:
+               return "SHA-1"
+       case SHA224:
+               return "SHA-224"
+       case SHA256:
+               return "SHA-256"
+       case SHA384:
+               return "SHA-384"
+       case SHA512:
+               return "SHA-512"
+       case MD5SHA1:
+               return "MD5+SHA1"
+       case RIPEMD160:
+               return "RIPEMD-160"
+       case SHA3_224:
+               return "SHA3-224"
+       case SHA3_256:
+               return "SHA3-256"
+       case SHA3_384:
+               return "SHA3-384"
+       case SHA3_512:
+               return "SHA3-512"
+       case SHA512_224:
+               return "SHA-512/224"
+       case SHA512_256:
+               return "SHA-512/256"
+       case BLAKE2s_256:
+               return "BLAKE2s-256"
+       case BLAKE2b_256:
+               return "BLAKE2b-256"
+       case BLAKE2b_384:
+               return "BLAKE2b-384"
+       case BLAKE2b_512:
+               return "BLAKE2b-512"
+       default:
+               return "unknown hash value " + strconv.Itoa(int(h))
+       }
+}
+
 const (
        MD4         Hash = 1 + iota // import golang.org/x/crypto/md4
        MD5                         // import crypto/md5