providers: Add crypto provider with bcrypt comparison

providers/all.go

@@ -8,6 +8,7 @@ import fppath     "git.tebibyte.media/sashakoshka/step/providers/path"
 import fpmime     "git.tebibyte.media/sashakoshka/step/providers/mime"
 import fpsprig    "git.tebibyte.media/sashakoshka/step/providers/sprig"
 import fpimport   "git.tebibyte.media/sashakoshka/step/providers/import"
+import fpcrypto   "git.tebibyte.media/sashakoshka/step/providers/crypto"
 import fpstrings  "git.tebibyte.media/sashakoshka/step/providers/strings"
 import fpsession  "git.tebibyte.media/sashakoshka/step/providers/session"
 import fpvalidate "git.tebibyte.media/sashakoshka/step/providers/validate"
@@ -23,6 +24,7 @@ func All () []step.Provider {
 		new(fpmime.Provider),
 		new(fpsprig.Provider),
 		new(fpimport.Provider),
+		new(fpcrypto.Provider),
 		new(fpsession.Provider),
 		new(fpstrings.Provider),
 		new(fpvalidate.Provider),

providers/crypto/crypto.go

@@ -0,0 +1,28 @@
+package crypto
+
+import "html/template"
+import "golang.org/x/crypto/bcrypt"
+import "git.tebibyte.media/sashakoshka/step"
+
+var _ step.FuncProvider = new(Provider)
+
+// Provider provides cryptographic functions.
+type Provider struct {
+	
+}
+
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "crypto"
+}
+
+// FuncMap fulfills the step.FuncProvider interface.
+func (this *Provider) FuncMap () template.FuncMap {
+	return template.FuncMap {
+		"bcryptCompare": funcBcryptCompare,
+	}
+}
+
+func funcBcryptCompare (hash string, text string) bool {
+	return bcrypt.CompareHashAndPassword([]byte(hash), []byte(text)) == nil
+}