mirror of
https://github.com/tillitis/tillitis-key1.git
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d3492e2a34
- Use correct name. - Don't declare it as static. - Lose the toolchain - Use only basename of path in the b2s comment
61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
// SPDX-FileCopyrightText: 2025 Tillitis AB <tillitis.se>
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// SPDX-License-Identifier: BSD-2-Clause
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package main
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import (
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"flag"
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"fmt"
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"os"
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"path"
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"golang.org/x/crypto/blake2s"
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)
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func usage() {
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fmt.Printf("Usage: %s -m filename [-c]\n", os.Args[0])
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}
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func printCDigest(digest [blake2s.Size]byte, fileName string) {
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fmt.Printf("#include <stdint.h>\n\n")
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fmt.Printf("// BLAKE2s digest of %v\n", path.Base(fileName))
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fmt.Printf("const uint8_t allowed_app_digest[32] = {\n")
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for _, n := range digest {
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fmt.Printf("0x%02x, ", n)
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}
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fmt.Printf("\n}; \n")
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}
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func main() {
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var messageFile string
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var forC bool
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flag.StringVar(&messageFile, "m", "", "Specify file containing message.")
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flag.BoolVar(&forC, "c", false, "Print digest for inclusion in C program.")
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flag.Usage = usage
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flag.Parse()
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if messageFile == "" {
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usage()
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os.Exit(0)
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}
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message, err := os.ReadFile(messageFile)
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if err != nil {
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fmt.Printf("%v\n", err)
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os.Exit(1)
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}
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digest := blake2s.Sum256(message)
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if forC {
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printCDigest(digest, messageFile)
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} else {
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fmt.Printf("%x %s\n", digest, messageFile)
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}
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os.Exit(0)
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}
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