1 files changed, 54 insertions, 0 deletions
diff --git a/vendor/github.com/goamz/goamz/exp/sdb/sign.go b/vendor/github.com/goamz/goamz/exp/sdb/sign.go
new file mode 100644
index 000000000..040ed5385
--- /dev/null
+++ b/vendor/github.com/goamz/goamz/exp/sdb/sign.go
@@ -0,0 +1,54 @@
+package sdb
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"github.com/goamz/goamz/aws"
+	"net/http"
+	"net/url"
+	"sort"
+	"strings"
+)
+
+var b64 = base64.StdEncoding
+
+// ----------------------------------------------------------------------------
+// SimpleDB signing (http://goo.gl/CaY81)
+
+func sign(auth aws.Auth, method, path string, params url.Values, headers http.Header) {
+	var host string
+	for k, v := range headers {
+		k = strings.ToLower(k)
+		switch k {
+		case "host":
+			host = v[0]
+		}
+	}
+
+	// set up some defaults used for signing the request
+	params["AWSAccessKeyId"] = []string{auth.AccessKey}
+	params["SignatureVersion"] = []string{"2"}
+	params["SignatureMethod"] = []string{"HmacSHA256"}
+	if auth.Token() != "" {
+		params["SecurityToken"] = []string{auth.Token()}
+	}
+
+	// join up all the incoming params
+	var sarray []string
+	for k, v := range params {
+		sarray = append(sarray, aws.Encode(k)+"="+aws.Encode(v[0]))
+	}
+	sort.StringSlice(sarray).Sort()
+	joined := strings.Join(sarray, "&")
+
+	// create the payload, sign it and create the signature
+	payload := strings.Join([]string{method, host, "/", joined}, "\n")
+	hash := hmac.New(sha256.New, []byte(auth.SecretKey))
+	hash.Write([]byte(payload))
+	signature := make([]byte, b64.EncodedLen(hash.Size()))
+	b64.Encode(signature, hash.Sum(nil))
+
+	// add the signature to the outgoing params
+	params["Signature"] = []string{string(signature)}
+}