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diff --git a/passgen/passgen.go b/passgen/passgen.go
index af19f55..4efe0d9 100644
--- a/passgen/passgen.go
+++ b/passgen/passgen.go
@@ -1,62 +1,62 @@
-// Package passgen generates random, unmemorable passwords.
+// Package passgen generates random passwords.
//
// Example usage:
//
// p := passgen.New() // p is "6NX(W`GD]4:Tqk};Y@A-"
//
// Logic originally from dchest's uniuri library:
// https://github.com/dchest/uniuri
//
// Functions read from crypto/rand random source, and panic if they fail to
// read from it.
package passgen
import "crypto/rand"
// DefLen is the default password length returned.
const DefLen = 20
// DefChars is the default set of characters used in the password.
var DefChars = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()- _=+,.?/:;{}[]`~")
-// New returns a random password of the default length with the default set of
-// characters.
+// New returns a random, unmemorable password of the default length with the
+// default set of characters.
func New() string {
return NewLenChars(DefLen, DefChars)
}
-// NewLen returns a random password of the given length with the default set
-// of characters.
+// NewLen returns a random, unmemorable password of the given length with the
+// default set of characters.
func NewLen(length int) string {
return NewLenChars(length, DefChars)
}
-// NewLenChars returns a random password of the given length with the given
-// set of characters.
+// NewLenChars returns a random, unmemorable password of the given length with
+// the given set of characters.
func NewLenChars(length int, chars []byte) string {
if length == 0 {
return ""
}
clen := len(chars)
maxrb := 255 - (256 % clen)
b := make([]byte, length)
r := make([]byte, length+(length/4)) // storage for random bytes.
i := 0
for {
if _, err := rand.Read(r); err != nil {
panic("passgen: error reading random bytes: " + err.Error())
}
for _, rb := range r {
c := int(rb)
if c > maxrb {
// Skip this number to avoid modulo bias.
continue
}
b[i] = chars[c%clen]
i++
if i == length {
return string(b)
}
}
}
}
diff --git a/passgen/wordish.go b/passgen/wordish.go
new file mode 100644
index 0000000..4749a56
--- /dev/null
+++ b/passgen/wordish.go
@@ -0,0 +1,64 @@
+package passgen
+
+import (
+ "crypto/rand"
+ "math/big"
+)
+
+var (
+ ar = []rune("aA4")
+ cr = []rune("cC")
+ er = []rune("eE3")
+ fr = []rune("fF")
+ gr = []rune("gG")
+ hr = []rune("hH")
+ ir = []rune("iI1")
+ lr = []rune("lL")
+ nr = []rune("nN")
+ or = []rune("oO0")
+ rr = []rune("rR")
+ sr = []rune("sS5")
+ tr = []rune("tT7")
+ remr = []rune("bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ0123456789")
+)
+
+// NewWordish generates a password made of word-like words.
+func NewWordish() string {
+ b := []rune{}
+ b = append(b, randLetter(cr))
+ b = append(b, randLetter(hr))
+ b = append(b, randLetter(ar))
+ b = append(b, randLetter(nr))
+ b = append(b, randLetter(gr))
+ b = append(b, randLetter(er))
+ b = append(b, randLetter(tr))
+ b = append(b, randLetter(hr))
+ b = append(b, randLetter(ir))
+ b = append(b, randLetter(sr))
+ b = append(b, randLetter(ar))
+ b = append(b, randLetter(fr))
+ b = append(b, randLetter(tr))
+ b = append(b, randLetter(er))
+ b = append(b, randLetter(rr))
+ b = append(b, randLetter(lr))
+ b = append(b, randLetter(or))
+ b = append(b, randLetter(gr))
+ b = append(b, randLetter(gr))
+ b = append(b, randLetter(ir))
+ b = append(b, randLetter(nr))
+ b = append(b, randLetter(gr))
+ b = append(b, randLetter(ir))
+ b = append(b, randLetter(nr))
+ for i := 0; i <= 7; i++ {
+ b = append(b, randLetter(remr))
+ }
+ return string(b)
+}
+
+func randLetter(l []rune) rune {
+ li, err := rand.Int(rand.Reader, big.NewInt(int64(len(l))))
+ if err != nil {
+ return rune(-1)
+ }
+ return l[li.Int64()]
+}

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