Merge pull request #128 from rvagg/rvagg/filecoin-hashes

feat: add two filecoin hashes, without Sum() implementations

Author: Stebalien

multihash.go

@@ -68,7 +68,9 @@ const (
 	// Deprecated: use MURMUR3_128
 	MURMUR3 = MURMUR3_128
 
-	X11 = 0x1100
+	SHA2_256_TRUNC254_PADDED  = 0x1012
+	X11                       = 0x1100
+	POSEIDON_BLS12_381_A1_FC1 = 0xb401
 )
 
 func init() {
@@ -93,47 +95,51 @@ func init() {
 
 // Names maps the name of a hash to the code
 var Names = map[string]uint64{
-	"identity":     IDENTITY,
-	"sha1":         SHA1,
-	"sha2-256":     SHA2_256,
-	"sha2-512":     SHA2_512,
-	"sha3":         SHA3_512,
-	"sha3-224":     SHA3_224,
-	"sha3-256":     SHA3_256,
-	"sha3-384":     SHA3_384,
-	"sha3-512":     SHA3_512,
-	"dbl-sha2-256": DBL_SHA2_256,
-	"murmur3-128":  MURMUR3_128,
-	"keccak-224":   KECCAK_224,
-	"keccak-256":   KECCAK_256,
-	"keccak-384":   KECCAK_384,
-	"keccak-512":   KECCAK_512,
-	"shake-128":    SHAKE_128,
-	"shake-256":    SHAKE_256,
-	"x11":          X11,
-	"md5":          MD5,
+	"identity":                  IDENTITY,
+	"sha1":                      SHA1,
+	"sha2-256":                  SHA2_256,
+	"sha2-512":                  SHA2_512,
+	"sha3":                      SHA3_512,
+	"sha3-224":                  SHA3_224,
+	"sha3-256":                  SHA3_256,
+	"sha3-384":                  SHA3_384,
+	"sha3-512":                  SHA3_512,
+	"dbl-sha2-256":              DBL_SHA2_256,
+	"murmur3-128":               MURMUR3_128,
+	"keccak-224":                KECCAK_224,
+	"keccak-256":                KECCAK_256,
+	"keccak-384":                KECCAK_384,
+	"keccak-512":                KECCAK_512,
+	"shake-128":                 SHAKE_128,
+	"shake-256":                 SHAKE_256,
+	"sha2-256-trunc254-padded":  SHA2_256_TRUNC254_PADDED,
+	"x11":                       X11,
+	"md5":                       MD5,
+	"poseidon-bls12_381-a2-fc1": POSEIDON_BLS12_381_A1_FC1,
 }
 
 // Codes maps a hash code to it's name
 var Codes = map[uint64]string{
-	IDENTITY:     "identity",
-	SHA1:         "sha1",
-	SHA2_256:     "sha2-256",
-	SHA2_512:     "sha2-512",
-	SHA3_224:     "sha3-224",
-	SHA3_256:     "sha3-256",
-	SHA3_384:     "sha3-384",
-	SHA3_512:     "sha3-512",
-	DBL_SHA2_256: "dbl-sha2-256",
-	MURMUR3_128:  "murmur3-128",
-	KECCAK_224:   "keccak-224",
-	KECCAK_256:   "keccak-256",
-	KECCAK_384:   "keccak-384",
-	KECCAK_512:   "keccak-512",
-	SHAKE_128:    "shake-128",
-	SHAKE_256:    "shake-256",
-	X11:          "x11",
-	MD5:          "md5",
+	IDENTITY:                  "identity",
+	SHA1:                      "sha1",
+	SHA2_256:                  "sha2-256",
+	SHA2_512:                  "sha2-512",
+	SHA3_224:                  "sha3-224",
+	SHA3_256:                  "sha3-256",
+	SHA3_384:                  "sha3-384",
+	SHA3_512:                  "sha3-512",
+	DBL_SHA2_256:              "dbl-sha2-256",
+	MURMUR3_128:               "murmur3-128",
+	KECCAK_224:                "keccak-224",
+	KECCAK_256:                "keccak-256",
+	KECCAK_384:                "keccak-384",
+	KECCAK_512:                "keccak-512",
+	SHAKE_128:                 "shake-128",
+	SHAKE_256:                 "shake-256",
+	SHA2_256_TRUNC254_PADDED:  "sha2-256-trunc254-padded",
+	X11:                       "x11",
+	POSEIDON_BLS12_381_A1_FC1: "poseidon-bls12_381-a2-fc1",
+	MD5:                       "md5",
 }
 
 // DefaultLengths maps a hash code to it's default length

multihash_test.go

@@ -32,6 +32,8 @@ var tCodes = map[uint64]string{
 	0x19:   "shake-256",
 	0x1100: "x11",
 	0xd5:   "md5",
+	0x1012: "sha2-256-trunc254-padded",
+	0xb401: "poseidon-bls12_381-a2-fc1",
 }
 
 type TestCase struct {
@@ -54,6 +56,8 @@ var testCases = []TestCase{
 	{"1af97f7818a28edfdfce5ec66dbdc7e871813816d7d585fe1f12475ded5b6502b7723b74e2ee36f2651a10a8eaca72aa9148c3c761aaceac8f6d6cc64381ed39", 0x19, "shake-256"},
 	{"4bca2b137edc580fe50a88983ef860ebaca36c857b1f492839d6d7392452a63c82cbebc68e3b70a2a1480b4bb5d437a7cba6ecf9d89f9ff3ccd14cd6146ea7e7", 0x14, "sha3-512"},
 	{"d41d8cd98f00b204e9800998ecf8427e", 0xd5, "md5"},
+	{"14fcb37dc45fa9a3c492557121bd4d461c0db40e5dcfcaa98498bd238486c307", 0x1012, "sha2-256-trunc254-padded"},
+	{"14fcb37dc45fa9a3c492557121bd4d461c0db40e5dcfcaa98498bd238486c307", 0xb401, "poseidon-bls12_381-a2-fc1"},
 }
 
 func (tc TestCase) Multihash() (Multihash, error) {