diff --git a/doc/luaossl.pdf b/doc/luaossl.pdf
index b7a09dc..306c636 100644
Binary files a/doc/luaossl.pdf and b/doc/luaossl.pdf differ
diff --git a/doc/luaossl.tex b/doc/luaossl.tex
index efc6422..2109499 100644
--- a/doc/luaossl.tex
+++ b/doc/luaossl.tex
@@ -1069,6 +1069,10 @@ \section{Modules}
 
 \emph{Only supported since OpenSSL 1.0.2.}
 
+\subsubsection[\fn{context:setCertificateChainFromFile}]{\fn{context:setCertificateChainFromFile($filepath$[, $format$])}}
+
+Sets the X.509 certificate chain \module{openssl.x509.chain} object to send during SSL connection instance handshakes, load the certificate chain from the file $filepath$. $format$ is either ``ASN1'' or ``PEM'' (default).
+
 \subsubsection[\fn{context:setCertificateChain}]{\fn{context:setCertificateChain($chain$)}}
 
 Sets the X.509 certificate chain \module{openssl.x509.chain} object $chain$ to send during SSL connection instance handshakes.
@@ -1081,6 +1085,10 @@ \section{Modules}
 
 \emph{Only supported since OpenSSL 1.0.2.}
 
+\subsubsection[\fn{context:setPrivateKeyFromFile}]{\fn{context:setPrivateKeyFromFile($filepath$[, $format$])}}
+
+Sets the private key \module{openssl.pkey} object to send during SSL connection instance handshakes, load the key from the file $filepath$. $format$ is either ``ASN1'' or ``PEM'' (default).
+
 \subsubsection[\fn{context:setPrivateKey}]{\fn{context:setPrivateKey($key$)}}
 
 Sets the private key \module{openssl.pkey} object $key$ for use during SSL connection instance handshakes.
@@ -1286,6 +1294,13 @@ \section{Modules}
 Sets the X.509 certificate \module{openssl.x509} object $crt$ to send during SSL connection instance handshakes.
 See \fn{openssl.ssl.context:setCertificate}.
 
+\subsubsection[\fn{ssl:setCertificateChainFromFile}]{\fn{ssl:setCertificateChainFromFile($filepath$[, $format$])}}
+
+Sets the X.509 certificate chain \module{openssl.x509.chain} object to send during SSL connection instance handshakes, load the certificate chain from the file $filepath$. $format$ is either ``ASN1'' or ``PEM'' (default).
+See \fn{openssl.ssl.context:setCertificateChainFromFile}.
+
+\emph{Only supported since OpenSSL 1.1.0.}
+
 \subsubsection[\fn{ssl:setCertificateChain}]{\fn{ssl:setCertificateChain($chain$)}}
 
 Sets the X.509 certificate chain \module{openssl.x509.chain} object $chain$ to send during SSL connection instance handshakes.
@@ -1293,13 +1308,18 @@ \section{Modules}
 
 \emph{Only supported since OpenSSL 1.0.2.}
 
-\subsubsection[\fn{context:getCertificateChain}]{\fn{context:getCertificateChain()}}
+\subsubsection[\fn{ssl:getCertificateChain}]{\fn{ssl:getCertificateChain()}}
 
 Returns the X.509 certificate chain \module{openssl.x509.chain} object to be sent during SSL connection instance handshakes.
 See \fn{openssl.ssl.context:getCertificateChain}.
 
 \emph{Only supported since OpenSSL 1.0.2.}
 
+\subsubsection[\fn{ssl:setPrivateKeyFromFile}]{\fn{ssl:setPrivateKeyFromFile($filepath$[, $format$])}}
+
+Sets the private key \module{openssl.pkey} object to send during SSL connection instance handshakes, load the key from the file $filepath$. $format$ is either ``ASN1'' or ``PEM'' (default).
+See \fn{openssl.ssl.context:setPrivateKeyFromFile}.
+
 \subsubsection[\fn{ssl:setPrivateKey}]{\fn{ssl:setPrivateKey($key$)}}
 
 Sets the private key \module{openssl.pkey} object $key$ for use during SSL connection instance handshakes.
diff --git a/src/openssl.c b/src/openssl.c
index 3a81907..d2cfeef 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -860,6 +860,25 @@ static int optencoding(lua_State *L, int index, const char *def, int allow) {
 	return type;
 } /* optencoding() */
 
+static int optfiletype(lua_State *L, int index, const char *def) {
+	static const char *const opts[] = { "pem", "asn1", NULL };
+	int type = 0;
+
+	switch (auxL_checkoption(L, index, def, opts, 1)) {
+	case 0:
+		type = SSL_FILETYPE_PEM;
+		break;
+	case 1:
+		type = SSL_FILETYPE_ASN1;
+		break;
+	}
+
+	if (!type) {
+		luaL_argerror(L, index, lua_pushfstring(L, "invalid option %s", luaL_checkstring(L, index)));
+	}
+
+	return type;
+}
 
 static _Bool rawgeti(lua_State *L, int index, int n) {
 	lua_rawgeti(L, index, n);
@@ -3256,12 +3275,6 @@ static const auxL_IntegerReg openssl_integers[] = {
 	{ NULL, 0 },
 };
 
-static const auxL_IntegerReg openssl_filetypes[] = {
-	{"PEM", SSL_FILETYPE_PEM},
-	{"ASN1", SSL_FILETYPE_ASN1},
-	{NULL, 0}
-};
-
 EXPORT int luaopen__openssl(lua_State *L) {
 	size_t i;
 
@@ -3285,12 +3298,6 @@ EXPORT int luaopen__openssl(lua_State *L) {
 	lua_pushstring(L, SHLIB_VERSION_NUMBER);
 	lua_setfield(L, -2, "SHLIB_VERSION_NUMBER");
 
-
-	lua_newtable(L);
-	auxL_setintegers(L, openssl_filetypes);
-
-	lua_setfield(L, -2, "filetypes");
-
 	return 1;
 } /* luaopen__openssl() */
 
@@ -9556,9 +9563,9 @@ static int sx_setPrivateKey(lua_State *L) {
 static int sx_setPrivateKeyFromFile(lua_State* L) {
 	SSL_CTX *ctx = checksimple(L, 1, SSL_CTX_CLASS);
 	const char* filepath = luaL_checkstring(L, 2);
-	int typ = luaL_optinteger(L, 3, SSL_FILETYPE_PEM);
+	int type = optfiletype(L, 3, "PEM");
 
-	if (!SSL_CTX_use_PrivateKey_file(ctx, filepath, typ))
+	if (!SSL_CTX_use_PrivateKey_file(ctx, filepath, type))
 		return auxL_error(L, auxL_EOPENSSL, "ssl.context:setPrivateKeyFromFile");
 
 	lua_pushboolean(L, 1);
@@ -10896,9 +10903,9 @@ static int ssl_setPrivateKey(lua_State *L) {
 static int ssl_setPrivateKeyFromFile(lua_State* L) {
 	SSL *ssl = checksimple(L, 1, SSL_CLASS);
 	const char* filepath = luaL_checkstring(L, 2);
-	int typ = luaL_optinteger(L, 3, SSL_FILETYPE_PEM);
+	int type = optfiletype(L, 3, "PEM");
 
-	if (!SSL_use_PrivateKey_file(ssl, filepath, typ))
+	if (!SSL_use_PrivateKey_file(ssl, filepath, type))
 		return auxL_error(L, auxL_EOPENSSL, "ssl:setPrivateKeyFromFile");
 
 	lua_pushboolean(L, 1);