4c850e7165
tarsum is not actually used by the registry. Remove support for it. Convert numerous uses in unit tests to SHA256. Update docs to remove mentions of tarsums (which were often inaccurate). Remove tarsum dependency. Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
44 lines
1,014 B
Go
44 lines
1,014 B
Go
package digest
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import (
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"hash"
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"io"
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)
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// Verifier presents a general verification interface to be used with message
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// digests and other byte stream verifications. Users instantiate a Verifier
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// from one of the various methods, write the data under test to it then check
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// the result with the Verified method.
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type Verifier interface {
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io.Writer
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// Verified will return true if the content written to Verifier matches
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// the digest.
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Verified() bool
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}
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// NewDigestVerifier returns a verifier that compares the written bytes
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// against a passed in digest.
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func NewDigestVerifier(d Digest) (Verifier, error) {
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if err := d.Validate(); err != nil {
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return nil, err
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}
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return hashVerifier{
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hash: d.Algorithm().Hash(),
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digest: d,
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}, nil
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}
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type hashVerifier struct {
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digest Digest
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hash hash.Hash
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}
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func (hv hashVerifier) Write(p []byte) (n int, err error) {
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return hv.hash.Write(p)
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}
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func (hv hashVerifier) Verified() bool {
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return hv.digest == NewDigest(hv.digest.Algorithm(), hv.hash)
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}
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