diff --git a/src/crypto/CMakeLists.txt b/src/crypto/CMakeLists.txt
--- a/src/crypto/CMakeLists.txt
+++ b/src/crypto/CMakeLists.txt
@@ -34,3 +34,71 @@
 
 # Dependencies
 target_link_libraries(crypto OpenSSL::Crypto)
+
+# Crypto libraries requiring hardware features
+macro(add_crypto_library NAME)
+	add_library(${NAME} ${ARGN})
+	target_link_libraries(crypto ${NAME})
+	target_include_directories(${NAME} PRIVATE ..)
+endmacro()
+
+include(CheckCXXSourceCompiles)
+
+# SSE4.1
+set(CRYPTO_SSE41_FLAGS -msse4.1)
+
+string(JOIN " " CMAKE_REQUIRED_FLAGS ${CRYPTO_SSE41_FLAGS})
+check_cxx_source_compiles("
+	#include <stdint.h>
+	#include <immintrin.h>
+	int main() {
+		__m128i l = _mm_set1_epi32(0);
+		return _mm_extract_epi32(l, 3);
+	}
+" ENABLE_SSE41)
+
+if(ENABLE_SSE41)
+	add_crypto_library(crypto_sse4.1 sha256_sse41.cpp)
+	target_compile_definitions(crypto_sse4.1 PUBLIC ENABLE_SSE41)
+	target_compile_options(crypto_sse4.1 PRIVATE ${CRYPTO_SSE41_FLAGS})
+endif()
+
+# AVX2
+set(CRYPTO_AVX2_FLAGS -mavx -mavx2)
+
+string(JOIN " " CMAKE_REQUIRED_FLAGS ${CRYPTO_AVX2_FLAGS})
+check_cxx_source_compiles("
+	#include <stdint.h>
+	#include <immintrin.h>
+	int main() {
+		__m256i l = _mm256_set1_epi32(0);
+		return _mm256_extract_epi32(l, 7);
+	}
+" ENABLE_AVX2)
+
+if(ENABLE_AVX2)
+	add_crypto_library(crypto_avx2 sha256_avx2.cpp)
+	target_compile_definitions(crypto_avx2 PUBLIC ENABLE_AVX2)
+	target_compile_options(crypto_avx2 PRIVATE ${CRYPTO_AVX2_FLAGS})
+endif()
+
+# SHA-NI
+set(CRYPTO_SHANI_FLAGS -msse4 -msha)
+
+string(JOIN " " CMAKE_REQUIRED_FLAGS ${CRYPTO_SHANI_FLAGS})
+check_cxx_source_compiles("
+	#include <stdint.h>
+	#include <immintrin.h>
+	int main() {
+		__m128i i = _mm_set1_epi32(0);
+		__m128i j = _mm_set1_epi32(1);
+		__m128i k = _mm_set1_epi32(2);
+		return _mm_extract_epi32(_mm_sha256rnds2_epu32(i, i, k), 0);
+	}
+" ENABLE_SHANI)
+
+if(ENABLE_SHANI)
+	add_crypto_library(crypto_shani sha256_shani.cpp)
+	target_compile_definitions(crypto_shani PUBLIC ENABLE_SHANI)
+	target_compile_options(crypto_shani PRIVATE ${CRYPTO_SHANI_FLAGS})
+endif()