feature: add building with pem-pack

CMakeLists.txt

@@ -83,6 +83,11 @@ option(
     ON
 )
 
+option(
+    CRYPTOPP_USE_PEM_PACK
+    "Include the PEM-Pack in compiliation (https://github.com/noloader/cryptopp-pem)"
+)
+
 if(CRYPTOPP_INCLUDE_PREFIX)
     set(CRYPTOPP_INCLUDE_PREFIX
         ${CRYPTOPP_INCLUDE_PREFIX}

cmake/GetCryptoppSources.cmake

@@ -22,6 +22,11 @@ if(GIT_FOUND)
         SOURCE_DIR
         ${CRYPTOPP_INCLUDE_PREFIX}
     )
+    fetchcontent_declare(
+        cryptopp-pem
+        GIT_REPOSITORY "https://github.com/noloader/cryptopp-pem"
+        QUIET
+    )
 else()
     message(STATUS "Downloading crypto++ from URL...")
     cmake_policy(SET CMP0135 NEW)
@@ -39,5 +44,13 @@ else()
         cryptopp
         URL "${source_location}.zip" QUIET SOURCE_DIR ${CRYPTOPP_INCLUDE_PREFIX}
     )
+    fetchcontent_declare(
+        cryptopp-pem
+        URL "https://github.com/noloader/cryptopp-pem/archive/refs/heads/master.zip"
+        QUIET
+    )
 endif()
 fetchcontent_populate(cryptopp)
+if(CRYPTOPP_USE_PEM_PACK)
+    fetchcontent_populate(cryptopp-pem)
+endif()

cryptopp/sources.cmake

@@ -182,6 +182,14 @@ set(cryptopp_SOURCES
     zlib.cpp
 )
 
+set(cryptopp_SOURCES_PEM
+    "${cryptopp-pem_SOURCE_DIR}/pem_common.cpp"
+    "${cryptopp-pem_SOURCE_DIR}/pem_eol.cxx"
+    "${cryptopp-pem_SOURCE_DIR}/pem_read.cpp"
+    "${cryptopp-pem_SOURCE_DIR}/pem_write.cpp"
+    "${cryptopp-pem_SOURCE_DIR}/x509cert.cpp"
+)
+
 # ***** Library headers *****
 set(cryptopp_HEADERS
     3way.h
@@ -374,6 +382,11 @@ set(cryptopp_HEADERS
     zlib.h
 )
 
+set(cryptopp_HEADERS_PEM
+    "${cryptopp-pem_SOURCE_DIR}/pem_common.h"
+    "${cryptopp-pem_SOURCE_DIR}/x509cert.h"
+)
+
 # ***** Test sources *****
 set(cryptopp_SOURCES_TEST
     # adhoc.cpp
@@ -448,3 +461,16 @@ if(ANDROID)
         ${ANDROID_NDK}/sources/android/cpufeatures/cpu-features.c
     )
 endif()
+
+if(CRYPTOPP_USE_PEM_PACK)
+    list(
+        APPEND
+        cryptopp_SOURCES
+        ${cryptopp_SOURCES_PEM}
+    )
+    list(
+        APPEND
+        cryptopp_HEADERS
+        ${cryptopp_HEADERS_PEM}
+    )
+endif()