JCE: add DH KeyFactory implementation, with tests

Author: cconlon

IDE/Android/app/src/main/cpp/CMakeLists.txt

@@ -65,6 +65,7 @@ if ("${WOLFSSL_PKG_TYPE}" MATCHES "normal")
                 -DWOLFSSL_AKID_NAME -DHAVE_CTS -DNO_DES3 -DGCM_TABLE_4BIT
                 -DTFM_TIMING_RESISTANT -DECC_TIMING_RESISTANT
                 -DHAVE_AESGCM -DSIZEOF_LONG=4 -DSIZEOF_LONG_LONG=8
+                -DWOLFSSL_KEY_GEN
                 -DWOLFSSL_CUSTOM_CONFIG
 
                 # For gethostbyname()

README_JCE.md

@@ -185,6 +185,7 @@ The JCE provider currently supports the following algorithms:
 
     KeyFactory
         EC
+        DH (aliases: DiffieHellman, 1.2.840.113549.1.3.1)
 
     CertPathValidator Class
         PKIX