# Copyright 2021 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

load("@rules_cc//cc:cc_library.bzl", "cc_library")
load("@rules_python//sphinxdocs:sphinx_docs_library.bzl", "sphinx_docs_library")
load("//pw_build:compatibility.bzl", "host_backend_alias", "incompatible_with_mcu")
load("//pw_build:pw_facade.bzl", "pw_facade")
load("//pw_unit_test:pw_cc_test.bzl", "pw_cc_test")

package(
    default_visibility = ["//visibility:public"],
    features = ["-layering_check"],
)

licenses(["notice"])

pw_facade(
    name = "sha256",
    hdrs = [
        "public/pw_crypto/sha256.h",
    ],
    backend = ":sha256_backend",
    strip_include_prefix = "public",
    deps = [
        "//pw_bytes",
        "//pw_log",
        "//pw_status",
        "//pw_stream",
    ],
)

label_flag(
    name = "sha256_backend",
    build_setting_default = ":unspecified_sha256_backend",
)

host_backend_alias(
    name = "unspecified_sha256_backend",
    backend = ":sha256_mbedtls",
)

cc_library(
    name = "sha256_mbedtls",
    srcs = ["sha256_mbedtls.cc"],
    hdrs = [
        "public/pw_crypto/sha256_mbedtls.h",
        "public_overrides/mbedtls/pw_crypto/sha256_backend.h",
    ],
    includes = [
        "public",
        "public_overrides/mbedtls",
    ],
    deps = [
        ":sha256.facade",
        "@mbedtls",
    ],
)

pw_cc_test(
    name = "sha256_test",
    srcs = ["sha256_test.cc"],
    deps = [":sha256"],
)

cc_library(
    name = "sha256_mock",
    srcs = ["sha256_mock.cc"],
    hdrs = [
        "public/pw_crypto/sha256_mock.h",
        "public_overrides/mock/pw_crypto/sha256_backend.h",
    ],
    includes = [
        "public",
        "public_overrides/mock",
    ],
    deps = [":sha256.facade"],
)

pw_cc_test(
    name = "sha256_mock_test",
    srcs = ["sha256_mock_test.cc"],
    deps = [":sha256_mock"],
)

pw_facade(
    name = "ecdsa",
    hdrs = [
        "public/pw_crypto/ecdsa.h",
    ],
    backend = ":ecdsa_backend",
    strip_include_prefix = "public",
    deps = [
        "//pw_bytes",
        "//pw_status",
    ],
)

label_flag(
    name = "ecdsa_backend",
    build_setting_default = ":unspecified_ecdsa_backend",
)

host_backend_alias(
    name = "unspecified_ecdsa_backend",
    backend = ":ecdsa_mbedtls",
)

cc_library(
    name = "ecdsa_mbedtls",
    srcs = ["ecdsa_mbedtls.cc"],
    deps = [
        ":ecdsa.facade",
        "//pw_function",
        "//pw_log",
        "//pw_span:cast",
        "@mbedtls",
    ],
)

pw_cc_test(
    name = "ecdsa_test",
    srcs = ["ecdsa_test.cc"],
    deps = [":ecdsa"],
)

pw_facade(
    name = "aes",
    hdrs = [
        "public/pw_crypto/aes.h",
        "public/pw_crypto/aes_backend_defs.h",
    ],
    backend = ":aes_backend",
    includes = ["public"],
    deps = [
        "//pw_bytes",
        "//pw_log",
        "//pw_status",
    ],
)

cc_library(
    name = "aes_cmac",
    hdrs = ["public/pw_crypto/aes_cmac.h"],
    deps = [":aes"],
)

label_flag(
    name = "aes_backend",
    build_setting_default = ":unspecified_aes_backend",
)

host_backend_alias(
    name = "unspecified_aes_backend",
    backend = ":aes_mbedtls",
)

cc_library(
    name = "aes_boringssl",
    srcs = ["aes_boringssl.cc"],
    hdrs = [
        "public/pw_crypto/aes_boringssl.h",
        "public_overrides/boringssl/pw_crypto/aes_backend.h",
    ],
    implementation_deps = ["//pw_assert:check"],
    includes = ["public_overrides/boringssl"],
    target_compatible_with = incompatible_with_mcu() + select({
        "@platforms//os:windows": ["@platforms//:incompatible"],
        "//conditions:default": [],
    }),
    deps = [
        ":aes.facade",
        "//pw_span:cast",
        "@boringssl//:crypto",
    ],
)

cc_library(
    name = "aes_mbedtls",
    srcs = ["aes_mbedtls.cc"],
    hdrs = [
        "public/pw_crypto/aes_mbedtls.h",
        "public_overrides/mbedtls/pw_crypto/aes_backend.h",
    ],
    implementation_deps = ["//pw_assert:check"],
    includes = ["public_overrides/mbedtls"],
    deps = [
        ":aes.facade",
        "@mbedtls",
    ],
)

pw_cc_test(
    name = "aes_test",
    srcs = [
        "aes_test.cc",
    ],
    deps = [
        ":aes",
        ":aes_cmac",
        "//pw_assert:assert",
        "//pw_containers:vector",
    ],
)

filegroup(
    name = "doxygen",
    srcs = [
        "public/pw_crypto/ecdsa.h",
        "public/pw_crypto/sha256.h",
    ],
)

sphinx_docs_library(
    name = "docs",
    srcs = [
        "docs.rst",
    ],
    prefix = "pw_crypto/",
    target_compatible_with = incompatible_with_mcu(),
)