1 files changed, 53 insertions, 0 deletions

diff --git a/src/gnunet/cmd/vanityid/main.go b/src/gnunet/cmd/vanityid/main.go
new file mode 100644
index 0000000..938df61
--- /dev/null
+++ b/src/gnunet/cmd/vanityid/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+        "crypto/rand"
+        "encoding/hex"
+        "flag"
+        "fmt"
+        "regexp"
+        "time"
+
+        "github.com/bfix/gospel/crypto/ed25519"
+        "gnunet/util"
+)
+
+func main() {
+        // get arguments
+        flag.Parse()
+        prefixes := flag.Args()
+        num := len(prefixes)
+        if num == 0 {
+                fmt.Println("No prefixes specified -- done.")
+                return
+        }
+
+        // pre-compile regexp
+        reg := make([]*regexp.Regexp, num)
+        for i, p := range prefixes {
+                reg[i] = regexp.MustCompile(p)
+        }
+
+        // generate new keys in a loop
+        seed := make([]byte, 32)
+        start := time.Now()
+        for i := 0; ; i++ {
+                n, err := rand.Read(seed)
+                if err != nil || n != 32 {
+                        panic(err)
+                }
+                prv := ed25519.NewPrivateKeyFromSeed(seed)
+                pub := prv.Public().Bytes()
+                id := util.EncodeBinaryToString(pub)
+                for _, r := range reg {
+                        if r.MatchString(id) {
+                                elapsed := time.Now().Sub(start)
+                                s1 := hex.EncodeToString(seed)
+                                s2 := hex.EncodeToString(prv.D.Bytes())
+                                fmt.Printf("%s [%s][%s] (%d tries, %s elapsed)\n", id, s1, s2, i, elapsed)
+                                i = 0
+                                start = time.Now()
+                        }
+                }
+        }
+}