*: moving to a repo

Since this was initially on https://gist.github.com/vbatts/ed28cddc23d6d2123e0c0295b278471b Folks asked for this to be `go get`'able. Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
2016-12-02 11:32:31 -05:00 · 2016-12-02 11:32:31 -05:00 · a8885e2038
parent b049d4d104
commit a8885e2038
2 changed files with 498 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -0,0 +1,57 @@
+# emojisum
+
+:pray: :paperclip: Emoji that checksum! :tada: :poop:
+
+I attempted a curated list of 256 emojis that are not entirely similar. Using http://www.webpagefx.com/tools/emoji-cheat-sheet/ to compare them. I went with 256 as that is 8bit/1byte, and the hexadecimal output that is 2 hex characters.
+
+So 1 emoji is 2 hex positions.
+
+## build
+
+```bash
+go get github.com/vbatts/emojisum
+```
+
+## usage
+
+This uses [`github.com/kyokomi/emoji`](https://github.com/kyokomi/emoji) to print to the console, but also gives the string ouptut for easy pasting to github/markdown.
+
+```bash
+$> emojisum main.go 
+SHA1(main.go)=  14b09535217ca8f5f47f4665e2266e686f0728b4
+SHA1(main.go)=  :bird::red_car::on::crystal_ball::calendar::lemon::pray::warning::violin::lollipop::facepunch::hearts::tm::children_crossing::hourglass::heavy_plus_sign::house::ant::clap::rocket:
+SHA1(main.go)=  🐦 🚗 🔛 🔮 📆 🍋 🙏 ⚠️🎻 🍭 👊 ♥️™️🚸 ⌛️➕ 🏠 🐜 👏 🚀 
+```
+
+Like so!
+
+SHA1(main.go)=  :bird::red_car::on::crystal_ball::calendar::lemon::pray::warning::violin::lollipop::facepunch::hearts::tm::children_crossing::hourglass::heavy_plus_sign::house::ant::clap::rocket:
+
+
+### pass in the checksums
+
+Rather than relying on this simple tool to do the checksum itself, you will likely want to rely on OpenSSL or coreutils for checksumming.
+`emojisum` can just take those formats on stdin:
+
+```bash
+$> sha1sum main.go | emojisum -parse-coreutils
+7656835947b4c6da272023c56b6f2529511bf88b  main.go
+:jp::gb::metal::goat::family::rocket::smiley_cat::swimmer::chocolate_bar::cactus::candy::smile::honeybee::house::cherries::cloud::fries::bow::wavy_dash::musical_score:  main.go
+🇯🇵 🇬🇧 🤘 🐐 👪 🚀 😺 🏊 🍫 🌵 🍬 😄 🐝 🏠 🍒 ☁️🍟 🙇 〰️ 🎼   main.go
+```
+
+Like so: 
+
+🇯🇵 🇬🇧 🤘 🐐 👪 🚀 😺 🏊 🍫 🌵 🍬 😄 🐝 🏠 🍒 ☁️🍟 🙇 〰️ 🎼   main.go
+
+
+```bash
+$> openssl sha1 main.go |emojisum -parse-openssl
+SHA1(main.go)= 7656835947b4c6da272023c56b6f2529511bf88b
+SHA1(main.go)= :jp::gb::metal::goat::family::rocket::smiley_cat::swimmer::chocolate_bar::cactus::candy::smile::honeybee::house::cherries::cloud::fries::bow::wavy_dash::musical_score:
+SHA1(main.go)= 🇯🇵 🇬🇧 🤘 🐐 👪 🚀 😺 🏊 🍫 🌵 🍬 😄 🐝 🏠 🍒 ☁️🍟 🙇 〰️ 🎼 
+```
+
+And like so:
+
+SHA1(main.go)= 🇯🇵 🇬🇧 🤘 🐐 👪 🚀 😺 🏊 🍫 🌵 🍬 😄 🐝 🏠 🍒 ☁️🍟 🙇 〰️ 🎼 
--- a/main.go
+++ b/main.go
@ -0,0 +1,441 @@
+package main
+
+import (
+	"bufio"
+	"crypto/sha1"
+	"encoding/hex"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"github.com/kyokomi/emoji"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+var (
+	flParseOpenSSL   = flag.Bool("parse-openssl", false, "parse the output of OpenSSL style checksums on stdin (`openssl sha256 ./foo | emojisum -parse-openssl`)")
+	flParseCoreUtils = flag.Bool("parse-coreutils", false, "parse the output of CoreUtils style checksums on stdin (`sha256sum ./foo | emojisum -parse-coreutils`)")
+)
+
+func run() error {
+	flag.Parse()
+
+	if *flParseOpenSSL {
+		buf := bufio.NewReader(os.Stdin)
+		for {
+			line, err := buf.ReadString('\n')
+			if err != nil && err == io.EOF {
+				return nil
+			} else if err != nil {
+				return err
+			}
+			hash, name, sum, err := parseOpenSSL(line)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "%s: %q\n", err, line)
+				continue
+			}
+			str := emojiFromBytes(sum)
+			fmt.Printf("%s(%s)= %x\n", hash, name, sum)
+			fmt.Printf("%s(%s)= %s\n", hash, name, str)
+			fmt.Printf("%s(%s)= ", hash, name)
+			emoji.Println(str)
+		}
+		return nil
+	}
+	if *flParseCoreUtils {
+		buf := bufio.NewReader(os.Stdin)
+		for {
+			line, err := buf.ReadString('\n')
+			if err != nil && err == io.EOF {
+				return nil
+			} else if err != nil {
+				return err
+			}
+			name, sum, err := parseCoreUtils(line)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "%s: %q\n", err, line)
+				continue
+			}
+			str := emojiFromBytes(sum)
+			fmt.Printf("%x  %s\n", sum, name)
+			fmt.Printf("%s  %s\n", str, name)
+			emoji.Print(str)
+			fmt.Printf("  %s\n", name)
+		}
+		return nil
+	}
+
+	// Otherwise do the checksum ourselves
+
+	if flag.NArg() == 0 {
+		sum, err := Sum(os.Stdin)
+		if err != nil {
+			return err
+		}
+		str := emojiFromBytes(sum)
+		fmt.Printf("SHA1(-)=\t%x\n", sum)
+		fmt.Printf("SHA1(-)=\t%s\n", str)
+		fmt.Printf("SHA1(-)=\t")
+		emoji.Println(str)
+		return nil
+	}
+
+	for _, arg := range flag.Args() {
+		fh, err := os.Open(arg)
+		if err != nil {
+			return err
+		}
+		defer fh.Close()
+
+		sum, err := Sum(fh)
+		if err != nil {
+			return err
+		}
+		str := emojiFromBytes(sum)
+		fmt.Printf("SHA1(%s)=\t%x\n", arg, sum)
+		fmt.Printf("SHA1(%s)=\t%s\n", arg, str)
+		fmt.Printf("SHA1(%s)=\t", arg)
+		emoji.Println(str)
+	}
+	return nil
+}
+
+/*
+openssl sum:
+```
+$> openssl sha256 tmp.efLuko
+SHA256(tmp.efLuko)= f18bd8b680e834ab8097a66deb0255821195d9624e39da6b65903ff6a09a01bb
+```
+*/
+func parseOpenSSL(line string) (hash, filename string, sum []byte, err error) {
+	if !strings.Contains(line, "(") {
+		return "", "", nil, ErrNotOpenSSLLine
+	}
+	chunks := strings.SplitN(strings.TrimRight(line, "\n"), ")= ", 2)
+	if len(chunks) != 2 {
+		return "", "", nil, ErrNotOpenSSLLine
+	}
+	chunksprime := strings.SplitN(chunks[0], "(", 2)
+	if len(chunks) != 2 {
+		return "", "", nil, ErrNotOpenSSLLine
+	}
+	sum, err = hex.DecodeString(chunks[1])
+	if err != nil {
+		return "", "", nil, err
+	}
+	return chunksprime[0], chunksprime[1], sum, nil
+}
+
+var ErrNotOpenSSLLine = errors.New("not an openssl checksum line")
+
+/*
+coreutils output:
+```
+$ sha256sum ./tmp.efLuko
+f18bd8b680e834ab8097a66deb0255821195d9624e39da6b65903ff6a09a01bb  ./tmp.efLuko
+```
+*/
+func parseCoreUtils(line string) (filename string, sum []byte, err error) {
+	chunks := strings.SplitN(strings.TrimRight(line, "\n"), "  ", 2)
+	if len(chunks) != 2 {
+		return "", nil, ErrNotCoreUtilsLine
+	}
+	sum, err = hex.DecodeString(chunks[0])
+	if err != nil {
+		return "", nil, err
+	}
+	return chunks[1], sum, nil
+}
+
+var ErrNotCoreUtilsLine = errors.New("not a coreutils checksum line")
+
+func Sum(r io.Reader) ([]byte, error) {
+	h := sha1.New()
+	if _, err := io.Copy(h, r); err != nil {
+		return nil, err
+	}
+	sum := h.Sum(nil)
+	return sum[:], nil
+}
+
+func emojiFromBytes(buf []byte) string {
+	var ret string
+	for _, b := range buf {
+		ret = ret + emojiFromRune(b)
+	}
+	return ret
+}
+
+func emojiFromRune(b byte) string {
+	//fmt.Printf("%#v\n", b)
+	return emojiMap[int(b)]
+}
+
+// these are an ordered list, referened by a byte (each byte of a checksum digest)
+var emojiMap = []string{
+	":+1:",
+	":8ball:",
+	":airplane:",
+	":alien:",
+	":anchor:",
+	":angel:",
+	":angry:",
+	":ant:",
+	":apple:",
+	":art:",
+	":baby:",
+	":baby_bottle:",
+	":back:",
+	":bamboo:",
+	":banana:",
+	":barber:",
+	":bathtub:",
+	":beer:",
+	":bell:",
+	":bicyclist:",
+	":bird:",
+	":birthday:",
+	":blossom:",
+	":blue_car:",
+	":boar:",
+	":bomb:",
+	":boom:",
+	":bow:",
+	":boy:",
+	":broken_heart:",
+	":bulb:",
+	":bus:",
+	":cactus:",
+	":calendar:",
+	":camera:",
+	":candy:",
+	":cat:",
+	":cherries:",
+	":children_crossing:",
+	":chocolate_bar:",
+	":clap:",
+	":cloud:",
+	":clubs:",
+	":cn:",
+	":coffee:",
+	":construction:",
+	":cookie:",
+	":copyright:",
+	":corn:",
+	":cow:",
+	":crescent_moon:",
+	":crown:",
+	":cry:",
+	":crystal_ball:",
+	":curly_loop:",
+	":dancers:",
+	":dash:",
+	":de:",
+	":diamonds:",
+	":dog:",
+	":doughnut:",
+	":dragon:",
+	":dvd:",
+	":ear:",
+	":eggplant:",
+	":elephant:",
+	":end:",
+	":envelope:",
+	":es:",
+	":eyes:",
+	":facepunch:",
+	":family:",
+	":ferris_wheel:",
+	":finnadie:",
+	":fire:",
+	":fireworks:",
+	":floppy_disk:",
+	":football:",
+	":fork_and_knife:",
+	":four_leaf_clover:",
+	":fr:",
+	":fries:",
+	":frog:",
+	":fu:",
+	":full_moon:",
+	":game_die:",
+	":gb:",
+	":gem:",
+	":girl:",
+	":goat:",
+	":grimacing:",
+	":grin:",
+	":guardsman:",
+	":guitar:",
+	":gun:",
+	":hamburger:",
+	":hammer:",
+	":hamster:",
+	":hear_no_evil:",
+	":heart:",
+	":heart_eyes_cat:",
+	":hearts:",
+	":heavy_check_mark:",
+	":moyai:",
+	":izakaya_lantern:",
+	":helicopter:",
+	":hocho:",
+	":honeybee:",
+	":horse:",
+	":horse_racing:",
+	":hourglass:",
+	":house:",
+	":hurtrealbad:",
+	":icecream:",
+	":imp:",
+	":it:",
+	":jack_o_lantern:",
+	":japanese_goblin:",
+	":jp:",
+	":key:",
+	":kiss:",
+	":kissing_cat:",
+	":koala:",
+	":kr:",
+	":lemon:",
+	":lipstick:",
+	":lock:",
+	":lollipop:",
+	":man:",
+	":maple_leaf:",
+	":mask:",
+	":metal:",
+	":microscope:",
+	":moneybag:",
+	":monkey:",
+	":mount_fuji:",
+	":muscle:",
+	":mushroom:",
+	":musical_keyboard:",
+	":musical_score:",
+	":nail_care:",
+	":new_moon:",
+	":no_entry:",
+	":nose:",
+	":notes:",
+	":nut_and_bolt:",
+	":o:",
+	":ocean:",
+	":ok_hand:",
+	":on:",
+	":package:",
+	":palm_tree:",
+	":panda_face:",
+	":paperclip:",
+	":partly_sunny:",
+	":passport_control:",
+	":paw_prints:",
+	":peach:",
+	":penguin:",
+	":phone:",
+	":pig:",
+	":pill:",
+	":pineapple:",
+	":pizza:",
+	":point_left:",
+	":point_right:",
+	":poop:",
+	":poultry_leg:",
+	":pray:",
+	":princess:",
+	":purse:",
+	":pushpin:",
+	":rabbit:",
+	":rainbow:",
+	":raised_hand:",
+	":recycle:",
+	":red_car:",
+	":registered:",
+	":ribbon:",
+	":rice:",
+	":rocket:",
+	":roller_coaster:",
+	":rooster:",
+	":ru:",
+	":sailboat:",
+	":santa:",
+	":satellite:",
+	":satisfied:",
+	":saxophone:",
+	":scissors:",
+	":see_no_evil:",
+	":sheep:",
+	":shell:",
+	":shoe:",
+	":ski:",
+	":skull:",
+	":sleepy:",
+	":smile:",
+	":smiley_cat:",
+	":smirk:",
+	":smoking:",
+	":snail:",
+	":snake:",
+	":snowflake:",
+	":soccer:",
+	":soon:",
+	":space_invader:",
+	":spades:",
+	":speak_no_evil:",
+	":star:",
+	":stars:",
+	":statue_of_liberty:",
+	":steam_locomotive:",
+	":sunflower:",
+	":sunglasses:",
+	":sunny:",
+	":sunrise:",
+	":surfer:",
+	":swimmer:",
+	":syringe:",
+	":tada:",
+	":tangerine:",
+	":taxi:",
+	":tennis:",
+	":tent:",
+	":thought_balloon:",
+	":tm:",
+	":toilet:",
+	":tongue:",
+	":tophat:",
+	":tractor:",
+	":trolleybus:",
+	":trollface:",
+	":trophy:",
+	":trumpet:",
+	":turtle:",
+	":two_men_holding_hands:",
+	":two_women_holding_hands:",
+	":uk:",
+	":umbrella:",
+	":unlock:",
+	":us:",
+	":v:",
+	":vhs:",
+	":violin:",
+	":warning:",
+	":watermelon:",
+	":wave:",
+	":wavy_dash:",
+	":wc:",
+	":wheelchair:",
+	":woman:",
+	":x:",
+	":yum:",
+	":zap:",
+	":zzz:",
+}