88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
package api
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import (
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"bytes"
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"crypto/sha256"
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"crypto/sha512"
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"encoding/base64"
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"fmt"
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"hash"
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"io"
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"io/ioutil"
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"math/rand"
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"testing"
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"testing/iotest"
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"github.com/stretchr/testify/require"
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)
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func TestChecksumValidatingReader(t *testing.T) {
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data := make([]byte, 4096)
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_, err := rand.Read(data)
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require.NoError(t, err)
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cases := []struct {
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algo string
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hash hash.Hash
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}{
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{"sha-256", sha256.New()},
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{"sha-512", sha512.New()},
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}
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for _, c := range cases {
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t.Run("valid: "+c.algo, func(t *testing.T) {
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_, err := c.hash.Write(data)
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require.NoError(t, err)
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checksum := c.hash.Sum(nil)
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digest := c.algo + "=" + base64.StdEncoding.EncodeToString(checksum)
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r := iotest.HalfReader(bytes.NewReader(data))
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cr, err := newChecksumValidatingReader(ioutil.NopCloser(r), digest)
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require.NoError(t, err)
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_, err = io.Copy(ioutil.Discard, cr)
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require.NoError(t, err)
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})
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t.Run("invalid: "+c.algo, func(t *testing.T) {
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_, err := c.hash.Write(data)
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require.NoError(t, err)
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checksum := c.hash.Sum(nil)
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// mess up checksum
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checksum[0]++
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digest := c.algo + "=" + base64.StdEncoding.EncodeToString(checksum)
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r := iotest.HalfReader(bytes.NewReader(data))
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cr, err := newChecksumValidatingReader(ioutil.NopCloser(r), digest)
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require.NoError(t, err)
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_, err = io.Copy(ioutil.Discard, cr)
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require.Error(t, err)
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require.Equal(t, errMismatchChecksum, err)
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})
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}
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}
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func TestChecksumValidatingReader_PropagatesError(t *testing.T) {
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pr, pw := io.Pipe()
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defer pr.Close()
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defer pw.Close()
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expectedErr := fmt.Errorf("some error")
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go func() {
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pw.Write([]byte("some input"))
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pw.CloseWithError(expectedErr)
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}()
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cr, err := newChecksumValidatingReader(pr, "sha-256=aaaa")
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require.NoError(t, err)
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_, err = io.Copy(ioutil.Discard, cr)
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require.Error(t, err)
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require.Equal(t, expectedErr, err)
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}
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