Add support for ENGINE supplied SSL client auth.

crypto/engine/eng_int.h

@@ -180,6 +180,8 @@ struct engine_st
 	ENGINE_LOAD_KEY_PTR load_privkey;
 	ENGINE_LOAD_KEY_PTR load_pubkey;
 
+	ENGINE_SSL_CLIENT_CERT_PTR load_ssl_client_cert;
+
 	const ENGINE_CMD_DEFN *cmd_defns;
 	int flags;
 	/* reference count on the structure itself */

crypto/engine/eng_pkey.c

@@ -69,6 +69,13 @@ int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f)
 	return 1;
 	}
 
+int ENGINE_set_load_ssl_client_cert_function(ENGINE *e,
+				ENGINE_SSL_CLIENT_CERT_PTR loadssl_f)
+	{
+	e->load_ssl_client_cert = loadssl_f;
+	return 1;
+	}
+
 ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e)
 	{
 	return e->load_privkey;
@@ -79,6 +86,11 @@ ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e)
 	return e->load_pubkey;
 	}
 
+ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE *e)
+	{
+	return e->load_ssl_client_cert;
+	}
+
 /* API functions to load public/private keys */
 
 EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id,
@@ -152,3 +164,34 @@ EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
 		}
 	return pkey;
 	}
+
+int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s,
+	STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **ppkey,
+	UI_METHOD *ui_method, void *callback_data)
+	{
+	int ret;
+
+	if(e == NULL)
+		{
+		ENGINEerr(ENGINE_F_ENGINE_LOAD_SSL_CLIENT_CERT,
+			ERR_R_PASSED_NULL_PARAMETER);
+		return 0;
+		}
+	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+	if(e->funct_ref == 0)
+		{
+		CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+		ENGINEerr(ENGINE_F_ENGINE_LOAD_SSL_CLIENT_CERT,
+			ENGINE_R_NOT_INITIALISED);
+		return 0;
+		}
+	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+	if (!e->load_ssl_client_cert)
+		{
+		ENGINEerr(ENGINE_F_ENGINE_LOAD_SSL_CLIENT_CERT,
+			ENGINE_R_NO_LOAD_FUNCTION);
+		return 0;
+		}
+	return e->load_ssl_client_cert(e, s, ca_dn, pcert, ppkey,
+					ui_method, callback_data);
+	}

crypto/engine/engine.h

@@ -280,6 +280,9 @@ typedef int (*ENGINE_CTRL_FUNC_PTR)(ENGINE *, int, long, void *, void (*f)(void)
 /* Generic load_key function pointer */
 typedef EVP_PKEY * (*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *,
 	UI_METHOD *ui_method, void *callback_data);
+typedef int (*ENGINE_SSL_CLIENT_CERT_PTR)(ENGINE *, SSL *ssl,
+	STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
+	UI_METHOD *ui_method, void *callback_data);
 /* These callback types are for an ENGINE's handler for cipher and digest logic.
  * These handlers have these prototypes;
  *   int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
@@ -476,6 +479,8 @@ int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f);
 int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f);
 int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f);
 int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f);
+int ENGINE_set_load_ssl_client_cert_function(ENGINE *e,
+				ENGINE_SSL_CLIENT_CERT_PTR loadssl_f);
 int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f);
 int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f);
 int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f);
@@ -513,6 +518,7 @@ ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e);
 ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e);
 ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e);
 ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e);
+ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE *e);
 ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e);
 ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e);
 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e);
@@ -556,6 +562,9 @@ EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id,
 	UI_METHOD *ui_method, void *callback_data);
 EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
 	UI_METHOD *ui_method, void *callback_data);
+int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s,
+	STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **ppkey,
+	UI_METHOD *ui_method, void *callback_data);
 
 /* This returns a pointer for the current ENGINE structure that
  * is (by default) performing any RSA operations. The value returned

crypto/ossl_typ.h

@@ -165,6 +165,8 @@ typedef struct ui_method_st UI_METHOD;
 typedef struct st_ERR_FNS ERR_FNS;
 
 typedef struct engine_st ENGINE;
+typedef struct ssl_st SSL;
+typedef struct ssl_ctx_st SSL_CTX;
 
 typedef struct X509_POLICY_NODE_st X509_POLICY_NODE;
 typedef struct X509_POLICY_LEVEL_st X509_POLICY_LEVEL;