diff --git a/lasso/id-ff/provider.c b/lasso/id-ff/provider.c
index c1a157bd..758533e6 100644
--- a/lasso/id-ff/provider.c
+++ b/lasso/id-ff/provider.c
@@ -66,6 +66,7 @@ use this default role to access descriptors.</para>
 #include <unistd.h>
 #include "../utils.h"
 #include "../debug.h"
+#include "../keyprivate.h"
 
 static char *protocol_uris[LASSO_MD_PROTOCOL_TYPE_LAST] = {
 	"http://projectliberty.org/profiles/fedterm",
@@ -1344,6 +1345,7 @@ lasso_provider_verify_saml_signature(LassoProvider *provider,
 	/* Get provider credentials */
 	lasso_check_good_rc(lasso_provider_try_loading_ca_cert_chain(provider, &keys_manager));
 	lasso_check_good_rc(lasso_provider_try_loading_public_keys(provider, &public_keys, keys_manager == NULL));
+
 	lasso_foreach_full_begin(xmlSecKey*, public_key, it, public_keys);
 	{
 		signature_rc = lasso_verify_signature(signed_node, doc, id_attribute_name, keys_manager, public_key,
@@ -1747,3 +1749,29 @@ cleanup:
 	lasso_release_gobject(provider);
 	return ret;
 }
+
+/**
+ * lasso_provider_set_specific_signing_key:
+ * @provider: a #LassoProvider object
+ * @key: a #LassoKey object
+ *
+ * Return value: 0 if successful, an error code otherwise.
+ */
+lasso_error_t
+lasso_provider_set_specific_signing_key(LassoProvider *provider,
+		LassoKey *key)
+{
+	lasso_error_t rc = 0;
+	LassoSignatureContext context = LASSO_SIGNATURE_CONTEXT_NONE;
+
+	lasso_bad_param(PROVIDER, provider);
+	lasso_bad_param(KEY, key);
+
+	context = lasso_key_get_signature_context(key);
+	goto_cleanup_if_fail_with_rc(lasso_validate_signature_context(context),
+			LASSO_DS_ERROR_PRIVATE_KEY_LOAD_FAILED);
+	lasso_assign_signature_context(provider->private_data->signature_context,
+			context);
+cleanup:
+	return rc;
+}
diff --git a/lasso/id-ff/provider.h b/lasso/id-ff/provider.h
index 3c66541e..76c0b8a9 100644
--- a/lasso/id-ff/provider.h
+++ b/lasso/id-ff/provider.h
@@ -31,6 +31,7 @@ extern "C" {
 
 #include "../xml/xml.h"
 #include "../xml/xml_enc.h"
+#include "../key.h"
 
 #define LASSO_TYPE_PROVIDER (lasso_provider_get_type())
 #define LASSO_PROVIDER(obj) \
@@ -270,6 +271,9 @@ LASSO_EXPORT LassoProviderRole lasso_provider_get_roles(LassoProvider *provider)
 
 LASSO_EXPORT gboolean lasso_provider_match_conformance(LassoProvider *provider, LassoProvider *another_provider);
 
+LASSO_EXPORT lasso_error_t lasso_provider_set_specific_signing_key(LassoProvider *provider,
+		LassoKey *key);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */