Add sha-family of hashers (#27)

pkg/pencode/encoders.go

@@ -14,6 +14,11 @@ var availableEncoders = map[string]Encoder{
  "jsonescape": JSONEscaper{},
  "jsonunescape": JSONUnescaper{},
  "md5": MD5Hasher{},
+ "sha1": SHA1Hasher{},
+ "sha224": SHA224Hasher{},
+ "sha256": SHA256Hasher{},
+ "sha384": SHA384Hasher{},
+ "sha512": SHA512Hasher{},
  "unicodedecode": UnicodeDecode{},
  "unicodeencodeall": UnicodeEncodeAll{},
  "urlencode": URLEncoder{},

pkg/pencode/sha1.go

@@ -0,0 +1,16 @@
+package pencode
+
+import (
+ "crypto/sha1"
+ "fmt"
+)
+
+type SHA1Hasher struct{}
+
+func (m SHA1Hasher) Encode(input []byte) ([]byte, error) {
+ return []byte(fmt.Sprintf("%x", sha1.Sum(input))), nil
+}
+
+func (m SHA1Hasher) HelpText() string {
+ return "SHA1 checksum"
+}

pkg/pencode/sha224.go

@@ -0,0 +1,16 @@
+package pencode
+
+import (
+ "crypto/sha256"
+ "fmt"
+)
+
+type SHA224Hasher struct{}
+
+func (m SHA224Hasher) Encode(input []byte) ([]byte, error) {
+ return []byte(fmt.Sprintf("%x", sha256.Sum224(input))), nil
+}
+
+func (m SHA224Hasher) HelpText() string {
+ return "SHA224 checksum"
+}

pkg/pencode/sha256.go

@@ -0,0 +1,16 @@
+package pencode
+
+import (
+ "crypto/sha256"
+ "fmt"
+)
+
+type SHA256Hasher struct{}
+
+func (m SHA256Hasher) Encode(input []byte) ([]byte, error) {
+ return []byte(fmt.Sprintf("%x", sha256.Sum256(input))), nil
+}
+
+func (m SHA256Hasher) HelpText() string {
+ return "SHA256 checksum"
+}

pkg/pencode/sha384.go

@@ -0,0 +1,16 @@
+package pencode
+
+import (
+ "crypto/sha512"
+ "fmt"
+)
+
+type SHA384Hasher struct{}
+
+func (m SHA384Hasher) Encode(input []byte) ([]byte, error) {
+ return []byte(fmt.Sprintf("%x", sha512.Sum384(input))), nil
+}
+
+func (m SHA384Hasher) HelpText() string {
+ return "SHA384 checksum"
+}

pkg/pencode/sha512.go

@@ -0,0 +1,16 @@
+package pencode
+
+import (
+ "crypto/sha512"
+ "fmt"
+)
+
+type SHA512Hasher struct{}
+
+func (m SHA512Hasher) Encode(input []byte) ([]byte, error) {
+ return []byte(fmt.Sprintf("%x", sha512.Sum512(input))), nil
+}
+
+func (m SHA512Hasher) HelpText() string {
+ return "SHA512 checksum"
+}