George Lambert
46f2bcd43e
Implements macOS v0: verae-print stamp + install-macos PDF menu items.
Saves {name}.pdf, {name}-verae-timestamp-{RECEIPTID}.pdf, and .verae.json.
Channels: verae (api.veraetime.net JWT) and zapier (zap.verae.ai xVerae- + attachPdf).
39 lines
850 B
Go
39 lines
850 B
Go
package hash
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import (
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"crypto/sha256"
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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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"strings"
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)
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// FileSHA256 returns the lowercase hex SHA-256 of the file at path.
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func FileSHA256(path string) (string, error) {
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f, 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 f.Close()
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h := sha256.New()
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if _, err := io.Copy(h, f); err != nil {
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return "", err
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}
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return hex.EncodeToString(h.Sum(nil)), nil
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}
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// NormalizeDigest lowercases and strips an optional sha256: prefix.
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func NormalizeDigest(d string) (string, error) {
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s := strings.TrimSpace(strings.ToLower(d))
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s = strings.TrimPrefix(s, "sha256:")
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if len(s) != 64 {
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return "", fmt.Errorf("digest must be 64 hex chars, got %d", len(s))
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}
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for _, c := range s {
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if (c < '0' || c > '9') && (c < 'a' || c > 'f') {
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return "", fmt.Errorf("digest is not hex")
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}
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}
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return s, nil
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}
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