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Use resumable hash in digest package

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Vendored resumable sha256/sha512 library. Digest package new exports a
resumable variant of the Digester.

Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
This commit is contained in:
Josh Hawn 2015-03-24 00:04:45 -07:00
parent da9d49d186
commit 60b6748c95
24 changed files with 2285 additions and 32 deletions
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7
digest/digest.go
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@ -2,7 +2,6 @@ package digest
import (
"bytes"
"crypto/sha256"
"fmt"
"hash"
"io"
@ -72,13 +71,13 @@ func ParseDigest(s string) (Digest, error) {
// FromReader returns the most valid digest for the underlying content.
func FromReader(rd io.Reader) (Digest, error) {
h := sha256.New()
digester := NewCanonicalDigester()
if _, err := io.Copy(h, rd); err != nil {
if _, err := io.Copy(digester, rd); err != nil {
return "", err
}
return NewDigest("sha256", h), nil
return digester.Digest(), nil
}
// FromTarArchive produces a tarsum digest from reader rd.