func (c CipherInfo) Pretty() string {
var colour func(string) string = nil
suffix := ""
if c.Kex.Broken || c.Auth.Broken || c.Cipher.Broken || c.MAC.Broken {
colour = tc.Red
suffix = " INSECURE"
} else if c.Cipher.KeySize < 128 || c.MAC.TagSize < 160 {
colour = tc.Yellow
suffix = " WEAK"
}
pad := " "
fs := tc.Yellow("no FS")
if c.Kex.ForwardSecure {
fs = tc.Green(" FS ")
}
aead := " "
if c.MAC.AEAD {
aead = "AEAD"
}
cstr := fmt.Sprintf("%3d", c.Cipher.KeySize)
if colour == nil && c.Kex.ForwardSecure && c.Cipher.KeySize >= 128 && c.MAC.AEAD {
colour = tc.Green
}
if colour == nil {
colour = func(s string) string {
return s
}
}
return fmt.Sprintf("%s%s %s %s %s%s", colour(c.Name), pad[len(c.Name)%len(pad):], fs, colour(cstr), colour(aead), colour(suffix))
}
func main() {
fmt.Printf("System colours:\n")
fmt.Printf("%s %s\n", tc.Black("Black"), tc.Bblack("Bright Black"))
fmt.Printf("%s %s\n", tc.Blue("Blue"), tc.Bblue("Bright Blue"))
fmt.Printf("%s %s\n", tc.Green("Green"), tc.Bgreen("Bright Green"))
fmt.Printf("%s %s\n", tc.Cyan("Cyan"), tc.Bcyan("Bright Cyan"))
fmt.Printf("%s %s\n", tc.Red("Red"), tc.Bred("Bright Red"))
fmt.Printf("%s %s\n", tc.Purple("Purple"), tc.Bpurple("Bright Purple"))
fmt.Printf("%s %s\n", tc.Yellow("Yellow"), tc.Byellow("Bright Yellow"))
fmt.Printf("%s %s\n", tc.White("White"), tc.Bwhite("Bright White"))
fmt.Printf("\n 256ish colour cube\n")
fmt.Print("4-bit palette: ")
for i := 0; i < 16; i++ {
fmt.Print(tc.Foreground8(tc.C256(i), "::"))
}
fmt.Print("\n ")
for i := 0; i < 16; i++ {
fmt.Print(tc.Background8(tc.C256(i), " "))
}
fmt.Print("\n")
for r0 := 0; r0 < 6; r0 += 3 {
for g := 0; g < 6; g++ {
for r := 0; r < 3; r++ {
for b := 0; b < 6; b++ {
c := tc.Colour256(r+r0, g, b)
fmt.Print(tc.Foreground8(c, "::"))
}
fmt.Print(" ")
}
fmt.Print(" ")
for r := 0; r < 3; r++ {
for b := 0; b < 6; b++ {
c := tc.Colour256(r+r0, g, b)
fmt.Print(tc.Background8(c, " "))
}
fmt.Print(" ")
}
fmt.Print("\n")
}
fmt.Print("\n")
}
fmt.Print("4.5-bit greyscale ramp: ")
for i := 232; i < 256; i++ {
fmt.Print(tc.Foreground8(tc.C256(i), "::"))
}
fmt.Print("\n ")
for i := 232; i < 256; i++ {
fmt.Print(tc.Background8(tc.C256(i), " "))
}
fmt.Print("\n")
}
func main() {
reader, err := os.Open(*image_file)
if err != nil {
log.Fatal(err)
}
defer reader.Close()
m, _, err := image.Decode(reader)
if err != nil {
log.Fatal(err)
}
bounds := m.Bounds()
fmt.Printf("Image is %s by %s pixels wide\n", tc.Green(fmt.Sprintf("%d", bounds.Max.X)), tc.Green(fmt.Sprintf("%d", bounds.Max.Y)))
if *use_24bit {
Write24(m, bounds)
} else {
Write8(m, bounds)
}
}
func prettyCertificate(cert *x509.Certificate) (string, string) {
key := "unknown"
if cert.PublicKeyAlgorithm == x509.RSA {
pk, ok := cert.PublicKey.(*rsa.PublicKey)
if !ok {
key = tc.Bred("RSA - error")
} else {
col := cStrength(pk.N.BitLen())
key = col(fmt.Sprintf("RSA-%d", pk.N.BitLen()))
}
} else if cert.PublicKeyAlgorithm == x509.DSA {
pk, ok := cert.PublicKey.(*dsa.PublicKey)
if !ok {
key = tc.Bred("DSA - error")
} else {
bl := pk.P.BitLen()
col := tc.Red
if bl < 1536 {
col = tc.Bred
}
key = col(fmt.Sprintf("DSA-%d", bl))
}
} else if cert.PublicKeyAlgorithm == x509.ECDSA {
pk, ok := cert.PublicKey.(*ecdsa.PublicKey)
if !ok {
key = tc.Bred("ECDSA - error")
} else {
bl := pk.Params().P.BitLen()
col := tc.Green
if bl < 224 {
col = tc.Red
} else if bl < 256 {
col = tc.Yellow
}
key = col(fmt.Sprintf("ECDSA-%d", bl))
}
}
sig := strSigAlg(cert.SignatureAlgorithm)
if cert.SignatureAlgorithm == x509.UnknownSignatureAlgorithm ||
cert.SignatureAlgorithm == x509.MD2WithRSA ||
cert.SignatureAlgorithm == x509.MD5WithRSA {
sig = tc.Bred(sig)
} else if cert.SignatureAlgorithm == x509.SHA1WithRSA ||
cert.SignatureAlgorithm == x509.DSAWithSHA1 ||
cert.SignatureAlgorithm == x509.DSAWithSHA256 ||
cert.SignatureAlgorithm == x509.ECDSAWithSHA1 {
sig = tc.Red(sig)
} else {
sig = tc.Green(sig)
}
subject := cert.Subject.CommonName
if len(subject) > 45 {
subject = subject[0:45]
}
issuer := cert.Issuer.CommonName
if len(issuer) > 45 {
issuer = issuer[0:45]
}
fpr := tc.Bblack(fmt.Sprintf("%x", sha1.Sum(cert.Raw)))
subject = fmt.Sprintf("subject: %-45s key type: %s / sig: %s", subject, key, sig)
issuer = fmt.Sprintf("issuer: %-45s fingerprint: %s", issuer, fpr)
return subject, issuer
}