ghash utility (work in progress)

Author: fileformat

README.md

@@ -1,15 +1,19 @@
-# File Format Tools
+# File Format Tools [<img alt="Logo for fftools" src="docs/favicon.svg" height="96" align="right"/>](https://www.fileformat.info/)
 
 ## Credits
 
+[![Git](https://www.vectorlogo.zone/logos/git-scm/git-scm-ar21.svg)](https://git-scm.com/ "Version control")
+[![Github](https://www.vectorlogo.zone/logos/github/github-ar21.svg)](https://github.com/ "Code hosting")
+[![golang](https://www.vectorlogo.zone/logos/golang/golang-ar21.svg)](https://golang.org/ "Programming language")
+[![svgrepo](https://www.vectorlogo.zone/logos/svgrepo/svgrepo-ar21.svg)](https://www.svgrepo.com/svg/276165/gardening-tools-rake "Icon")
 
 ## To Do
 
 - [ ] `anyascii`: converts to ASCII using [anyascii](https://github.com/anyascii/anyascii)
 - [ ] `asciitable`: prints out an table of ASCII characters
 - [ ] `bytecount`: counts the number of occurrences of each byte
 - [ ] `ghash`: calculate various hashes
-- [ ] `hexdumpc`: generate `hexdump -C` output in case you don't have `hexdump` installed
+- [x] `hexdumpc`: generate canonical hexdump (`hexdump -C`) output in case you don't have [`hexdump`](https://man7.org/linux/man-pages/man1/hexdump.1.html) installed
 - [ ] `trilobyte`: translates bytes according to a map
-- [ ] `ustrings`: like the standard [`strings`]() utility, but with Unicode support
-- [ ] `unhexdump`: convert the (edited) output of [`hexdump -C`]() back to binary
+- [ ] `ustrings`: like the standard [`strings`](https://man7.org/linux/man-pages/man1/strings.1.html) utility, but with Unicode support
+- [ ] `unhexdump`: convert the (edited) output of [`hexdump -C`](https://man7.org/linux/man-pages/man1/hexdump.1.html) back to binary

cmd/ghash/ghash.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"bufio"
+	"crypto"
+	_ "crypto/md5"
+	_ "crypto/sha1"
+	_ "crypto/sha256"
+	_ "crypto/sha3"
+	_ "crypto/sha512"
+
+	"fmt"
+	"os"
+
+	_ "golang.org/x/crypto/blake2b"
+	_ "golang.org/x/crypto/blake2s"
+	_ "golang.org/x/crypto/md4"
+	_ "golang.org/x/crypto/ripemd160"
+
+	"github.com/spf13/pflag"
+)
+
+func printHashes(fileName string, hashes []string) error {
+	// Open the file
+	file, err := os.Open(fileName)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	reader := bufio.NewReader(file)
+
+	return nil
+}
+
+func main() {
+	var hashes []string
+	var list bool
+	pflag.StringArrayVar(&hashes, "hash", []string{}, "Hash algorithms to use (e.g., sha256, sha512)")
+	pflag.BoolVar(&list, "list", false, "List available hash algorithms")
+	//LATER: output format
+
+	pflag.Parse()
+
+	if list {
+		for i := crypto.MD4; i <= crypto.BLAKE2b_512; i++ {
+			if i.Available() {
+				fmt.Fprintf(os.Stdout, "%s: %s\n", i, "true")
+			} else {
+				fmt.Fprintf(os.Stdout, "%s: %s\n", i, "false")
+			}
+		}
+		return
+	}
+
+	args := pflag.Args()
+	if len(args) == 0 {
+		args = []string{"-"}
+	}
+	for _, arg := range args {
+		if arg == "-" {
+			arg = "/dev/stdin"
+		}
+
+		if err := printHashes(arg, hashes); err != nil {
+			panic(err)
+		}
+	}
+
+}

go.mod

@@ -1,5 +1,10 @@
 module github.com/FileFormatInfo/fftools
 
-go 1.23.2
+go 1.24
 
-require github.com/spf13/pflag v1.0.6 // indirect
+require golang.org/x/crypto v0.38.0
+
+require (
+	github.com/spf13/pflag v1.0.6 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+)

go.sum

@@ -1,2 +1,6 @@
 github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
 github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+golang.org/x/crypto v0.38.0 h1:jt+WWG8IZlBnVbomuhg2Mdq0+BBQaHbtqHEFEigjUV8=
+golang.org/x/crypto v0.38.0/go.mod h1:MvrbAqul58NNYPKnOra203SB9vpuZW0e+RRZV+Ggqjw=
+golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
+golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=