diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bdf57d6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/der-0.4.5.crate
diff --git a/README.md b/README.md
deleted file mode 100644
index 2144ba2..0000000
--- a/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# rust-der0.4
-
-The rust-der0.4 package
diff --git a/rust-der0.4.spec b/rust-der0.4.spec
new file mode 100644
index 0000000..e0b45c7
--- /dev/null
+++ b/rust-der0.4.spec
@@ -0,0 +1,168 @@
+# Generated by rust2rpm 24
+%bcond_without check
+%global debug_package %{nil}
+
+%global crate der
+
+Name:           rust-der0.4
+Version:        0.4.5
+Release:        %autorelease
+Summary:        Pure Rust embedded-friendly implementation of DER for ASN.1
+
+License:        Apache-2.0 OR MIT
+URL:            https://crates.io/crates/der
+Source:         %{crates_source}
+
+BuildRequires:  rust-packaging >= 21
+
+%global _description %{expand:
+Pure Rust embedded-friendly implementation of the Distinguished Encoding
+Rules (DER) for Abstract Syntax Notation One (ASN.1) as described in ITU
+X.690 with full support for heapless no_std targets.}
+
+%description %{_description}
+
+%package        devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description    devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "%{crate}" crate.
+
+%files          devel
+%license %{crate_instdir}/LICENSE-APACHE
+%license %{crate_instdir}/LICENSE-MIT
+%doc %{crate_instdir}/CHANGELOG.md
+%doc %{crate_instdir}/README.md
+%{crate_instdir}/
+
+%package     -n %{name}+default-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+default-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "default" feature of the "%{crate}" crate.
+
+%files       -n %{name}+default-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+alloc-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+alloc-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "alloc" feature of the "%{crate}" crate.
+
+%files       -n %{name}+alloc-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+bigint-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+bigint-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "bigint" feature of the "%{crate}" crate.
+
+%files       -n %{name}+bigint-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+const-oid-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+const-oid-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "const-oid" feature of the "%{crate}" crate.
+
+%files       -n %{name}+const-oid-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+crypto-bigint-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+crypto-bigint-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "crypto-bigint" feature of the "%{crate}" crate.
+
+%files       -n %{name}+crypto-bigint-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+der_derive-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+der_derive-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "der_derive" feature of the "%{crate}" crate.
+
+%files       -n %{name}+der_derive-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+derive-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+derive-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "derive" feature of the "%{crate}" crate.
+
+%files       -n %{name}+derive-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+oid-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+oid-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "oid" feature of the "%{crate}" crate.
+
+%files       -n %{name}+oid-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+std-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+std-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "std" feature of the "%{crate}" crate.
+
+%files       -n %{name}+std-devel
+%ghost %{crate_instdir}/Cargo.toml
+
+%prep
+%autosetup -n %{crate}-%{version_no_tilde} -p1
+%cargo_prep
+
+%generate_buildrequires
+%cargo_generate_buildrequires
+
+%build
+%cargo_build
+
+%install
+%cargo_install
+
+%if %{with check}
+%check
+%cargo_test
+%endif
+
+%changelog
+%autochangelog
diff --git a/sources b/sources
new file mode 100644
index 0000000..c6e4df5
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (der-0.4.5.crate) = 9d58e6b0fe348a53adc3dbd944bad4499f65efa14d19dad0a62f026801d8c31fcaee877f31242e73dfb9816a58489fb88c59e289c9a6a21c8edde325050329c6