Use blake256 sum.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@tomclegg.ca>

diff --git a/tilelib.go b/tilelib.go
index 51f5fdc574d473c5b95ad6ad65c32f0fc5c113d7..cf06bb93ce77cf87391c5934f9ee105b734ff893 100644 (file)
--- a/tilelib.go
+++ b/tilelib.go
@@ -21,7 +21,7 @@ type tileSeq map[string][]tileLibRef
 
 type tileLibrary struct {
        taglib  *tagLibrary
-       variant [][][blake2b.Size]byte
+       variant [][][blake2b.Size256]byte
        // count [][]int
        // seq map[[blake2b.Size]byte][]byte
        variants int
@@ -99,18 +99,9 @@ func (tilelib *tileLibrary) getRef(tag tagID, seq []byte) tileLibRef {
        //      tilelib.seq = map[[blake2b.Size]byte][]byte{}
        // }
        if tilelib.variant == nil {
-               tilelib.variant = make([][][blake2b.Size]byte, tilelib.taglib.Len())
+               tilelib.variant = make([][][blake2b.Size256]byte, tilelib.taglib.Len())
        }
-       hash, err := blake2b.New(32, nil)
-       if err != nil {
-               panic(err)
-       }
-       _, err = hash.Write(seq)
-       if err != nil {
-               panic(err)
-       }
-       var seqhash [blake2b.Size]byte
-       copy(seqhash[:], hash.Sum(nil))
+       seqhash := blake2b.Sum256(seq)
        for i, varhash := range tilelib.variant[tag] {
                if varhash == seqhash {
                        return tileLibRef{tag: tag, variant: tileVariantID(i + 1)}