35 lines
548 B
Go
35 lines
548 B
Go
package transfer
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import (
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"crypto/sha512"
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"encoding/hex"
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"fmt"
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"io"
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"os"
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)
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// VerifySha512File checks that a file matches the expected sha512 hash.
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func VerifySha512File(path, expected string) error {
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if expected == "" {
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return nil
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}
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file, err := os.Open(path)
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if err != nil {
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return err
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}
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defer file.Close()
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hasher := sha512.New()
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if _, err := io.Copy(hasher, file); err != nil {
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return err
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}
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actual := hex.EncodeToString(hasher.Sum(nil))
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if actual != expected {
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return fmt.Errorf("sha512 mismatch")
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}
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return nil
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}
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