blake2s: add 128-bit digest support.
Although a 128-bit digest provides little collision resistance it can be
used as a MAC, as found in the WireGuard protocol.
Change-Id: I06ee528e5711035da8f1b254c223a6fda8890abf
Reviewed-on: https://go-review.googlesource.com/39370
Reviewed-by: Adam Langley <agl@golang.org>
diff --git a/blake2s/blake2s.go b/blake2s/blake2s.go
index 7e3fc4f..f2d8221 100644
--- a/blake2s/blake2s.go
+++ b/blake2s/blake2s.go
@@ -15,8 +15,12 @@
const (
// The blocksize of BLAKE2s in bytes.
BlockSize = 64
+
// The hash size of BLAKE2s-256 in bytes.
Size = 32
+
+ // The hash size of BLAKE2s-128 in bytes.
+ Size128 = 16
)
var errKeySize = errors.New("blake2s: invalid key size")
@@ -37,6 +41,17 @@
// key turns the hash into a MAC. The key must between zero and 32 bytes long.
func New256(key []byte) (hash.Hash, error) { return newDigest(Size, key) }
+// New128 returns a new hash.Hash computing the BLAKE2s-128 checksum given a
+// non-empty key. Note that a 128-bit digest is too small to be secure as a
+// cryptographic hash and should only be used as a MAC, thus the key argument
+// is not optional.
+func New128(key []byte) (hash.Hash, error) {
+ if len(key) == 0 {
+ return nil, errors.New("blake2s: a key is required for a 128-bit hash")
+ }
+ return newDigest(Size128, key)
+}
+
func newDigest(hashSize int, key []byte) (*digest, error) {
if len(key) > Size {
return nil, errKeySize
diff --git a/blake2s/blake2s_test.go b/blake2s/blake2s_test.go
index e6f2eeb..ff41670 100644
--- a/blake2s/blake2s_test.go
+++ b/blake2s/blake2s_test.go
@@ -18,21 +18,25 @@
if useSSE4 {
t.Log("SSE4 version")
testHashes(t)
+ testHashes128(t)
useSSE4 = false
}
if useSSSE3 {
t.Log("SSSE3 version")
testHashes(t)
+ testHashes128(t)
useSSSE3 = false
}
if useSSE2 {
t.Log("SSE2 version")
testHashes(t)
+ testHashes128(t)
useSSE2 = false
}
if useGeneric {
t.Log("generic version")
testHashes(t)
+ testHashes128(t)
}
}
@@ -69,6 +73,39 @@
}
}
+func testHashes128(t *testing.T) {
+ key, _ := hex.DecodeString("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f")
+
+ input := make([]byte, 255)
+ for i := range input {
+ input[i] = byte(i)
+ }
+
+ for i, expectedHex := range hashes128 {
+ h, err := New128(key)
+ if err != nil {
+ t.Fatalf("#%d: error from New128: %v", i, err)
+ }
+
+ h.Write(input[:i])
+ sum := h.Sum(nil)
+
+ if gotHex := fmt.Sprintf("%x", sum); gotHex != expectedHex {
+ t.Fatalf("#%d (single write): got %s, wanted %s", i, gotHex, expectedHex)
+ }
+
+ h.Reset()
+ for j := 0; j < i; j++ {
+ h.Write(input[j : j+1])
+ }
+
+ sum = h.Sum(sum[:0])
+ if gotHex := fmt.Sprintf("%x", sum); gotHex != expectedHex {
+ t.Fatalf("#%d (byte-by-byte): got %s, wanted %s", i, gotHex, expectedHex)
+ }
+ }
+}
+
// Benchmarks
func benchmarkSum(b *testing.B, size int) {
@@ -355,3 +392,262 @@
"db444c15597b5f1a03d1f9edd16e4a9f43a667cc275175dfa2b704e3bb1a9b83",
"3fb735061abc519dfe979e54c1ee5bfad0a9d858b3315bad34bde999efd724dd",
}
+
+var hashes128 = []string{
+ "9536f9b267655743dee97b8a670f9f53",
+ "13bacfb85b48a1223c595f8c1e7e82cb",
+ "d47a9b1645e2feae501cd5fe44ce6333",
+ "1e2a79436a7796a3e9826bfedf07659f",
+ "7640360ed3c4f3054dba79a21dda66b7",
+ "d1207ac2bf5ac84fc9ef016da5a46a86",
+ "3123987871e59305ece3125abfc0099a",
+ "cf9e072ad522f2cda2d825218086731c",
+ "95d22870392efe2846b12b6e8e84efbb",
+ "7d63c30e2d51333f245601b038c0b93b",
+ "ed608b98e13976bdf4bedc63fa35e443",
+ "ed704b5cd1abf8e0dd67a6ac667a3fa5",
+ "77dc70109827dc74c70fd26cba379ae5",
+ "d2bf34508b07825ee934f33958f4560e",
+ "a340baa7b8a93a6e658adef42e78eeb7",
+ "b85c5ceaecbe9a251eac76f6932ba395",
+ "246519722001f6e8e97a2183f5985e53",
+ "5bce5aa0b7c6cac2ecf6406183cd779a",
+ "13408f1647c02f6efd0047ad8344f695",
+ "a63970f196760aa36cb965ab62f0e0fa",
+ "bc26f48421dd99fd45e15e736d3e7dac",
+ "4c6f70f9e3237cde918afb52d26f1823",
+ "45ed610cfbc37db80c4bf0eef14ae8d6",
+ "87c4c150705ea5078209ec008200539c",
+ "54de21f5e0e6f2afe04daeb822b6931e",
+ "9732a04e505064e19de3d542e7e71631",
+ "d2bd27e95531d6957eef511c4ba64ad4",
+ "7a36c9f70dcc7c3063b547101a5f6c35",
+ "322007d1a44c4257bc7903b183305529",
+ "dbcc9a09f412290ca2e0d53dfd142ddb",
+ "df12ed43b8e53a56db20e0f83764002c",
+ "d114cc11e7d5b33a360c45f18d4c7c6e",
+ "c43b5e836af88620a8a71b1652cb8640",
+ "9491c653e8867ed73c1b4ac6b5a9bb4d",
+ "06d0e988df94ada6c6f9f36f588ab7c5",
+ "561efad2480e93262c8eeaa3677615c4",
+ "ba8ffc702e5adc93503045eca8702312",
+ "5782be6ccdc78c8425285e85de8ccdc6",
+ "aa1c4393e4c07b53ea6e2b5b1e970771",
+ "42a229dc50e52271c51e8666023ebc1e",
+ "53706110e919f84de7f8d6c7f0e7b831",
+ "fc5ac8ee39cc1dd1424391323e2901bd",
+ "bed27b62ff66cac2fbb68193c727106a",
+ "cd5e689b96d0b9ea7e08dac36f7b211e",
+ "0b4c7f604eba058d18e322c6e1baf173",
+ "eb838227fdfad09a27f0f8413120675d",
+ "3149cf9d19a7fd529e6154a8b4c3b3ad",
+ "ca1e20126df930fd5fb7afe4422191e5",
+ "b23398f910599f3c09b6549fa81bcb46",
+ "27fb17c11b34fa5d8b5afe5ee3321ead",
+ "0f665f5f04cf2d46b7fead1a1f328158",
+ "8f068be73b3681f99f3b282e3c02bba5",
+ "ba189bbd13808dcf4e002a4dd21660d5",
+ "2732dcd1b16668ae6ab6a61595d0d62a",
+ "d410ccdd059f0e02b472ec9ec54bdd3c",
+ "b2eaa07b055b3a03a399971327f7e8c2",
+ "2e8a225655e9f99b69c60dc8b4d8e566",
+ "4eb55416c853f2152e67f8a224133cec",
+ "49552403790d8de0505a8e317a443687",
+ "7f2747cd41f56942752e868212c7d5ac",
+ "02a28f10e193b430df7112d2d98cf759",
+ "d4213404a9f1cf759017747cf5958270",
+ "faa34884344f9c65e944882db8476d34",
+ "ece382a8bd5018f1de5da44b72cea75b",
+ "f1efa90d2547036841ecd3627fafbc36",
+ "811ff8686d23a435ecbd0bdafcd27b1b",
+ "b21beea9c7385f657a76558530438721",
+ "9cb969da4f1b4fc5b13bf78fe366f0c4",
+ "8850d16d7b614d3268ccfa009d33c7fc",
+ "aa98a2b6176ea86415b9aff3268c6f6d",
+ "ec3e1efa5ed195eff667e16b1af1e39e",
+ "e40787dca57411d2630db2de699beb08",
+ "554835890735babd06318de23d31e78a",
+ "493957feecddc302ee2bb2086b6ebfd3",
+ "f6069709ad5b0139163717e9ce1114ab",
+ "ba5ed386098da284484b211555505a01",
+ "9244c8dfad8cbb68c118fa51465b3ae4",
+ "51e309a5008eb1f5185e5cc007cfb36f",
+ "6ce9ff712121b4f6087955f4911eafd4",
+ "59b51d8dcda031218ccdd7c760828155",
+ "0012878767a3d4f1c8194458cf1f8832",
+ "82900708afd5b6582dc16f008c655edd",
+ "21302c7e39b5a4cdf1d6f86b4f00c9b4",
+ "e894c7431591eab8d1ce0fe2aa1f01df",
+ "b67e1c40ee9d988226d605621854d955",
+ "6237bdafa34137cbbec6be43ea9bd22c",
+ "4172a8e19b0dcb09b978bb9eff7af52b",
+ "5714abb55bd4448a5a6ad09fbd872fdf",
+ "7ce1700bef423e1f958a94a77a94d44a",
+ "3742ec50cded528527775833453e0b26",
+ "5d41b135724c7c9c689495324b162f18",
+ "85c523333c6442c202e9e6e0f1185f93",
+ "5c71f5222d40ff5d90e7570e71ab2d30",
+ "6e18912e83d012efb4c66250ced6f0d9",
+ "4add4448c2e35e0b138a0bac7b4b1775",
+ "c0376c6bc5e7b8b9d2108ec25d2aab53",
+ "f72261d5ed156765c977751c8a13fcc1",
+ "cff4156c48614b6ceed3dd6b9058f17e",
+ "36bfb513f76c15f514bcb593419835aa",
+ "166bf48c6bffaf8291e6fdf63854bef4",
+ "0b67d33f8b859c3157fbabd9e6e47ed0",
+ "e4da659ca76c88e73a9f9f10f3d51789",
+ "33c1ae2a86b3f51c0642e6ed5b5aa1f1",
+ "27469b56aca2334449c1cf4970dcd969",
+ "b7117b2e363378aa0901b0d6a9f6ddc0",
+ "a9578233b09e5cd5231943fdb12cd90d",
+ "486d7d75253598b716a068243c1c3e89",
+ "66f6b02d682b78ffdc85e9ec86852489",
+ "38a07b9a4b228fbcc305476e4d2e05d2",
+ "aedb61c7970e7d05bf9002dae3c6858c",
+ "c03ef441f7dd30fdb61ad2d4d8e4c7da",
+ "7f45cc1eea9a00cb6aeb2dd748361190",
+ "a59538b358459132e55160899e47bd65",
+ "137010fef72364411820c3fbed15c8df",
+ "d8362b93fc504500dbd33ac74e1b4d70",
+ "a7e49f12c8f47e3b29cf8c0889b0a9c8",
+ "072e94ffbfc684bd8ab2a1b9dade2fd5",
+ "5ab438584bd2229e452052e002631a5f",
+ "f233d14221097baef57d3ec205c9e086",
+ "3a95db000c4a8ff98dc5c89631a7f162",
+ "0544f18c2994ab4ddf1728f66041ff16",
+ "0bc02116c60a3cc331928d6c9d3ba37e",
+ "b189dca6cb5b813c74200834fba97f29",
+ "ac8aaab075b4a5bc24419da239212650",
+ "1e9f19323dc71c29ae99c479dc7e8df9",
+ "12d944c3fa7caa1b3d62adfc492274dd",
+ "b4c68f1fffe8f0030e9b18aad8c9dc96",
+ "25887fab1422700d7fa3edc0b20206e2",
+ "8c09f698d03eaf88abf69f8147865ef6",
+ "5c363ae42a5bec26fbc5e996428d9bd7",
+ "7fdfc2e854fbb3928150d5e3abcf56d6",
+ "f0c944023f714df115f9e4f25bcdb89b",
+ "6d19534b4c332741c8ddd79a9644de2d",
+ "32595eb23764fbfc2ee7822649f74a12",
+ "5a51391aab33c8d575019b6e76ae052a",
+ "98b861ce2c620f10f913af5d704a5afd",
+ "b7fe2fc8b77fb1ce434f8465c7ddf793",
+ "0e8406e0cf8e9cc840668ece2a0fc64e",
+ "b89922db99c58f6a128ccffe19b6ce60",
+ "e1be9af665f0932b77d7f5631a511db7",
+ "74b96f20f58de8dc9ff5e31f91828523",
+ "36a4cfef5a2a7d8548db6710e50b3009",
+ "007e95e8d3b91948a1dedb91f75de76b",
+ "a87a702ce08f5745edf765bfcd5fbe0d",
+ "847e69a388a749a9c507354d0dddfe09",
+ "07176eefbc107a78f058f3d424ca6a54",
+ "ad7e80682333b68296f6cb2b4a8e446d",
+ "53c4aba43896ae422e5de5b9edbd46bf",
+ "33bd6c20ca2a7ab916d6e98003c6c5f8",
+ "060d088ea94aa093f9981a79df1dfcc8",
+ "5617b214b9df08d4f11e58f5e76d9a56",
+ "ca3a60ee85bd971e1daf9f7db059d909",
+ "cd2b7754505d8c884eddf736f1ec613e",
+ "f496163b252f1439e7e113ba2ecabd8e",
+ "5719c7dcf9d9f756d6213354acb7d5cf",
+ "6f7dd40b245c54411e7a9be83ae5701c",
+ "c8994dd9fdeb077a45ea04a30358b637",
+ "4b1184f1e35458c1c747817d527a252f",
+ "fc7df674afeac7a3fd994183f4c67a74",
+ "4f68e05ce4dcc533acf9c7c01d95711e",
+ "d4ebc59e918400720035dfc88e0c486a",
+ "d3105dd6fa123e543b0b3a6e0eeaea9e",
+ "874196128ed443f5bdb2800ca048fcad",
+ "01645f134978dc8f9cf0abc93b53780e",
+ "5b8b64caa257873a0ffd47c981ef6c3f",
+ "4ee208fc50ba0a6e65c5b58cec44c923",
+ "53f409a52427b3b7ffabb057ca088428",
+ "c1d6cd616f5341a93d921e356e5887a9",
+ "e85c20fea67fa7320dc23379181183c8",
+ "7912b6409489df001b7372bc94aebde7",
+ "e559f761ec866a87f1f331767fafc60f",
+ "20a6f5a36bc37043d977ed7708465ef8",
+ "6a72f526965ab120826640dd784c6cc4",
+ "bf486d92ad68e87c613689dd370d001b",
+ "d339fd0eb35edf3abd6419c8d857acaf",
+ "9521cd7f32306d969ddabc4e6a617f52",
+ "a1cd9f3e81520842f3cf6cc301cb0021",
+ "18e879b6f154492d593edd3f4554e237",
+ "66e2329c1f5137589e051592587e521e",
+ "e899566dd6c3e82cbc83958e69feb590",
+ "8a4b41d7c47e4e80659d77b4e4bfc9ae",
+ "f1944f6fcfc17803405a1101998c57dd",
+ "f6bcec07567b4f72851b307139656b18",
+ "22e7bb256918fe9924dce9093e2d8a27",
+ "dd25b925815fe7b50b7079f5f65a3970",
+ "0457f10f299acf0c230dd4007612e58f",
+ "ecb420c19efd93814fae2964d69b54af",
+ "14eb47b06dff685d88751c6e32789db4",
+ "e8f072dbb50d1ab6654aa162604a892d",
+ "69cff9c62092332f03a166c7b0034469",
+ "d3619f98970b798ca32c6c14cd25af91",
+ "2246d423774ee9d51a551e89c0539d9e",
+ "75e5d1a1e374a04a699247dad827b6cf",
+ "6d087dd1d4cd15bf47db07c7a96b1db8",
+ "967e4c055ac51b4b2a3e506cebd5826f",
+ "7417aa79247e473401bfa92a25b62e2a",
+ "24f3f4956da34b5c533d9a551ccd7b16",
+ "0c40382de693a5304e2331eb951cc962",
+ "9436f949d51b347db5c8e6258dafaaac",
+ "d2084297fe84c4ba6e04e4fb73d734fe",
+ "42a6f8ff590af21b512e9e088257aa34",
+ "c484ad06b1cdb3a54f3f6464a7a2a6fd",
+ "1b8ac860f5ceb4365400a201ed2917aa",
+ "c43eadabbe7b7473f3f837fc52650f54",
+ "0e5d3205406126b1f838875deb150d6a",
+ "6bf4946f8ec8a9c417f50cd1e67565be",
+ "42f09a2522314799c95b3fc121a0e3e8",
+ "06b8f1487f691a3f7c3f74e133d55870",
+ "1a70a65fb4f314dcf6a31451a9d2704f",
+ "7d4acdd0823279fd28a1e48b49a04669",
+ "09545cc8822a5dfc93bbab708fd69174",
+ "efc063db625013a83c9a426d39a9bddb",
+ "213bbf89b3f5be0ffdb14854bbcb2588",
+ "b69624d89fe2774df9a6f43695d755d4",
+ "c0f9ff9ded82bd73c512e365a894774d",
+ "d1b68507ed89c17ead6f69012982db71",
+ "14cf16db04648978e35c44850855d1b0",
+ "9f254d4eccab74cd91d694df863650a8",
+ "8f8946e2967baa4a814d36ff01d20813",
+ "6b9dc4d24ecba166cb2915d7a6cba43b",
+ "eb35a80418a0042b850e294db7898d4d",
+ "f55f925d280c637d54055c9df088ef5f",
+ "f48427a04f67e33f3ba0a17f7c9704a7",
+ "4a9f5bfcc0321aea2eced896cee65894",
+ "8723a67d1a1df90f1cef96e6fe81e702",
+ "c166c343ee25998f80bad4067960d3fd",
+ "dab67288d16702e676a040fd42344d73",
+ "c8e9e0d80841eb2c116dd14c180e006c",
+ "92294f546bacf0dea9042c93ecba8b34",
+ "013705b1502b37369ad22fe8237d444e",
+ "9b97f8837d5f2ebab0768fc9a6446b93",
+ "7e7e5236b05ec35f89edf8bf655498e7",
+ "7be8f2362c174c776fb9432fe93bf259",
+ "2422e80420276d2df5702c6470879b01",
+ "df645795db778bcce23bbe819a76ba48",
+ "3f97a4ac87dfc58761cda1782d749074",
+ "50e3f45df21ebfa1b706b9c0a1c245a8",
+ "7879541c7ff612c7ddf17cb8f7260183",
+ "67f6542b903b7ba1945eba1a85ee6b1c",
+ "b34b73d36ab6234b8d3f5494d251138e",
+ "0aea139641fdba59ab1103479a96e05f",
+ "02776815a87b8ba878453666d42afe3c",
+ "5929ab0a90459ebac5a16e2fb37c847e",
+ "c244def5b20ce0468f2b5012d04ac7fd",
+ "12116add6fefce36ed8a0aeccce9b6d3",
+ "3cd743841e9d8b878f34d91b793b4fad",
+ "45e87510cf5705262185f46905fae35f",
+ "276047016b0bfb501b2d4fc748165793",
+ "ddd245df5a799417d350bd7f4e0b0b7e",
+ "d34d917a54a2983f3fdbc4b14caae382",
+ "7730fbc09d0c1fb1939a8fc436f6b995",
+ "eb4899ef257a1711cc9270a19702e5b5",
+ "8a30932014bce35bba620895d374df7a",
+ "1924aabf9c50aa00bee5e1f95b5d9e12",
+ "1758d6f8b982aec9fbe50f20e3082b46",
+ "cd075928ab7e6883e697fe7fd3ac43ee",
+}
