mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-11 08:54:21 -05:00
29 lines
740 B
Go
29 lines
740 B
Go
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package license
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import (
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"encoding/base64"
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"fmt"
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"github.com/edgelesssys/constellation/internal/file"
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)
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func FromFile(fileHandler file.Handler, path string) (string, error) {
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readBytes, err := fileHandler.Read(path)
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if err != nil {
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return "", fmt.Errorf("unable to read from '%s': %w", path, err)
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}
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maxSize := base64.StdEncoding.DecodedLen(len(readBytes))
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decodedLicense := make([]byte, maxSize)
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n, err := base64.StdEncoding.Decode(decodedLicense, readBytes)
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if err != nil {
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return "", fmt.Errorf("unable to base64 decode license file: %w", err)
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}
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if n != 36 { // length of UUID
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return "", fmt.Errorf("license file corrupt: wrong length")
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}
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decodedLicense = decodedLicense[:n]
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return string(decodedLicense), nil
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}
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