Add hashing function

1 files changed, 26 insertions, 0 deletions

diff --git a/hashing/hash.go b/hashing/hash.go
new file mode 100644
index 0000000..400659e
--- /dev/null
+++ b/hashing/hash.go
@@ -0,0 +1,26 @@
+package hashing
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"math/big"
+	"time"
+)
+
+const UrlLength = 7
+
+// GenerateURI creates a unique identifier for a paste based on ip and timestamp
+func GenerateURI(ip string) string {
+	timeStamp := time.Now().String()
+	return hashString(ip + timeStamp)[:UrlLength]
+}
+
+// hashes using MD5 and then converts to base 62
+func hashString(text string) string {
+	hash := md5.Sum([]byte(text))
+	hexStr := hex.EncodeToString(hash[:])
+
+	bi := big.NewInt(0)
+	bi.SetString(hexStr, 16)
+	return bi.Text(62)
+}
\ No newline at end of file