aboutsummaryrefslogtreecommitdiffstats
path: root/kube2msb/src/vendor/github.com/docker/distribution/digest/digest.go
diff options
context:
space:
mode:
Diffstat (limited to 'kube2msb/src/vendor/github.com/docker/distribution/digest/digest.go')
-rw-r--r--kube2msb/src/vendor/github.com/docker/distribution/digest/digest.go139
1 files changed, 0 insertions, 139 deletions
diff --git a/kube2msb/src/vendor/github.com/docker/distribution/digest/digest.go b/kube2msb/src/vendor/github.com/docker/distribution/digest/digest.go
deleted file mode 100644
index 31d821b..0000000
--- a/kube2msb/src/vendor/github.com/docker/distribution/digest/digest.go
+++ /dev/null
@@ -1,139 +0,0 @@
-package digest
-
-import (
- "fmt"
- "hash"
- "io"
- "regexp"
- "strings"
-)
-
-const (
- // DigestSha256EmptyTar is the canonical sha256 digest of empty data
- DigestSha256EmptyTar = "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
-)
-
-// Digest allows simple protection of hex formatted digest strings, prefixed
-// by their algorithm. Strings of type Digest have some guarantee of being in
-// the correct format and it provides quick access to the components of a
-// digest string.
-//
-// The following is an example of the contents of Digest types:
-//
-// sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc
-//
-// This allows to abstract the digest behind this type and work only in those
-// terms.
-type Digest string
-
-// NewDigest returns a Digest from alg and a hash.Hash object.
-func NewDigest(alg Algorithm, h hash.Hash) Digest {
- return NewDigestFromBytes(alg, h.Sum(nil))
-}
-
-// NewDigestFromBytes returns a new digest from the byte contents of p.
-// Typically, this can come from hash.Hash.Sum(...) or xxx.SumXXX(...)
-// functions. This is also useful for rebuilding digests from binary
-// serializations.
-func NewDigestFromBytes(alg Algorithm, p []byte) Digest {
- return Digest(fmt.Sprintf("%s:%x", alg, p))
-}
-
-// NewDigestFromHex returns a Digest from alg and a the hex encoded digest.
-func NewDigestFromHex(alg, hex string) Digest {
- return Digest(fmt.Sprintf("%s:%s", alg, hex))
-}
-
-// DigestRegexp matches valid digest types.
-var DigestRegexp = regexp.MustCompile(`[a-zA-Z0-9-_+.]+:[a-fA-F0-9]+`)
-
-// DigestRegexpAnchored matches valid digest types, anchored to the start and end of the match.
-var DigestRegexpAnchored = regexp.MustCompile(`^` + DigestRegexp.String() + `$`)
-
-var (
- // ErrDigestInvalidFormat returned when digest format invalid.
- ErrDigestInvalidFormat = fmt.Errorf("invalid checksum digest format")
-
- // ErrDigestInvalidLength returned when digest has invalid length.
- ErrDigestInvalidLength = fmt.Errorf("invalid checksum digest length")
-
- // ErrDigestUnsupported returned when the digest algorithm is unsupported.
- ErrDigestUnsupported = fmt.Errorf("unsupported digest algorithm")
-)
-
-// ParseDigest parses s and returns the validated digest object. An error will
-// be returned if the format is invalid.
-func ParseDigest(s string) (Digest, error) {
- d := Digest(s)
-
- return d, d.Validate()
-}
-
-// FromReader returns the most valid digest for the underlying content using
-// the canonical digest algorithm.
-func FromReader(rd io.Reader) (Digest, error) {
- return Canonical.FromReader(rd)
-}
-
-// FromBytes digests the input and returns a Digest.
-func FromBytes(p []byte) Digest {
- return Canonical.FromBytes(p)
-}
-
-// Validate checks that the contents of d is a valid digest, returning an
-// error if not.
-func (d Digest) Validate() error {
- s := string(d)
-
- if !DigestRegexpAnchored.MatchString(s) {
- return ErrDigestInvalidFormat
- }
-
- i := strings.Index(s, ":")
- if i < 0 {
- return ErrDigestInvalidFormat
- }
-
- // case: "sha256:" with no hex.
- if i+1 == len(s) {
- return ErrDigestInvalidFormat
- }
-
- switch algorithm := Algorithm(s[:i]); algorithm {
- case SHA256, SHA384, SHA512:
- if algorithm.Size()*2 != len(s[i+1:]) {
- return ErrDigestInvalidLength
- }
- break
- default:
- return ErrDigestUnsupported
- }
-
- return nil
-}
-
-// Algorithm returns the algorithm portion of the digest. This will panic if
-// the underlying digest is not in a valid format.
-func (d Digest) Algorithm() Algorithm {
- return Algorithm(d[:d.sepIndex()])
-}
-
-// Hex returns the hex digest portion of the digest. This will panic if the
-// underlying digest is not in a valid format.
-func (d Digest) Hex() string {
- return string(d[d.sepIndex()+1:])
-}
-
-func (d Digest) String() string {
- return string(d)
-}
-
-func (d Digest) sepIndex() int {
- i := strings.Index(string(d), ":")
-
- if i < 0 {
- panic("could not find ':' in digest: " + d)
- }
-
- return i
-}