Consider whether we should implement getHashSumFromBytes

[rht]

aqua-verifier-go/verify/verify.go

Line 429 in 5655d22

if actual := getHashSum(string(decoded[:])); actual != fileContentHash {

might be a costly copying operation.

According to a comment in https://stackoverflow.com/questions/14373634/how-expensive-is-bytestring

"The book "Programming in Go" made the claim: "The []byte(string) conversion is very fast (O(1)) since under the hood the []byte can simply refer to the string’s underlying bytes with no copying required. The same is true of the reverse conversion, string([]byte); again the underlying bytes are not copied, so the conversion is O(1)." So it seems this claim was incorrect.

But the subsequent comment also links to this open issue golang/go#2205.