(Feat): Initial Commit

internal/util/hashing/argon2_params.go

@@ -0,0 +1,39 @@
+package hashing
+
+import "allaboutapps.dev/aw/go-starter/internal/util"
+
+var (
+	// DefaultArgon2Params represents Argon2ID parameter recommendations in accordance with:
+	// https://pkg.go.dev/golang.org/x/crypto@v0.0.0-20200420201142-3c4aac89819a/argon2?tab=doc#IDKey @ 2020-04-22T11:23:38Z
+	DefaultArgon2Params = &Argon2Params{
+		Time: 1, // 1 second
+		//nolint:mnd
+		Memory: 64 * 1024, // ~64MB memory costs
+		//nolint:mnd
+		Threads: 4, // 4 threads
+		//nolint:mnd
+		KeyLength: 32, // 256 bit key length
+		//nolint:mnd
+		SaltLength: 16, // 126 bit salt length
+	}
+)
+
+type Argon2Params struct {
+	Time       uint32
+	Memory     uint32
+	Threads    uint8
+	KeyLength  uint32
+	SaltLength uint32
+}
+
+func DefaultArgon2ParamsFromEnv() *Argon2Params {
+	params := &Argon2Params{
+		Time:       util.GetEnvAsUint32("AUTH_HASHING_ARGON2_TIME", DefaultArgon2Params.Time),
+		Memory:     util.GetEnvAsUint32("AUTH_HASHING_ARGON2_MEMORY", DefaultArgon2Params.Memory),
+		Threads:    util.GetEnvAsUint8("AUTH_HASHING_ARGON2_THREADS", DefaultArgon2Params.Threads),
+		KeyLength:  util.GetEnvAsUint32("AUTH_HASHING_ARGON2_KEY_LENGTH", DefaultArgon2Params.KeyLength),
+		SaltLength: util.GetEnvAsUint32("AUTH_HASHING_ARGON2_SALT_LENGTH", DefaultArgon2Params.SaltLength),
+	}
+
+	return params
+}