Adding upstream version 1:2.3.19.1+dfsg1.upstream/1%2.3.19.1+dfsg1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 1497 insertions, 0 deletions

diff --git a/pigeonhole/src/lib-sieve/plugins/environment/Makefile.am b/pigeonhole/src/lib-sieve/plugins/environment/Makefile.am
new file mode 100644
index 0000000..916362e
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/Makefile.am
@@ -0,0 +1,24 @@
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+
diff --git a/pigeonhole/src/lib-sieve/plugins/environment/Makefile.in b/pigeonhole/src/lib-sieve/plugins/environment/Makefile.in
new file mode 100644
index 0000000..9224df2
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/Makefile.in
@@ -0,0 +1,753 @@
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+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libsieve_ext_environment.la: $(libsieve_ext_environment_la_OBJECTS) $(libsieve_ext_environment_la_DEPENDENCIES) $(EXTRA_libsieve_ext_environment_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK)  $(libsieve_ext_environment_la_OBJECTS) $(libsieve_ext_environment_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ext-environment-common.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ext-environment.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tst-environment.Plo@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
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+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
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+	done
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+uninstall-pkginc_libHEADERS:
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+	      $$unique; \
+	  fi; \
+	fi
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+GTAGS:
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+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
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+distdir-am: $(DISTFILES)
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+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
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+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
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+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
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+	  fi; \
+	done
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+check: check-am
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+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+	fi
+mostlyclean-generic:
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+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/ext-environment-common.Plo
+	-rm -f ./$(DEPDIR)/ext-environment.Plo
+	-rm -f ./$(DEPDIR)/tst-environment.Plo
+	-rm -f Makefile
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+		-rm -f ./$(DEPDIR)/ext-environment-common.Plo
+	-rm -f ./$(DEPDIR)/ext-environment.Plo
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+	-rm -f Makefile
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+	cscopelist-am ctags ctags-am distclean distclean-compile \
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+	install-exec install-exec-am install-html install-html-am \
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+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/pigeonhole/src/lib-sieve/plugins/environment/ext-environment-common.c b/pigeonhole/src/lib-sieve/plugins/environment/ext-environment-common.c
new file mode 100644
index 0000000..28d4251
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/ext-environment-common.c
@@ -0,0 +1,339 @@
+/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
+ */
+
+#include "lib.h"
+#include "hash.h"
+
+#include "sieve-common.h"
+#include "sieve-extensions.h"
+#include "sieve-interpreter.h"
+
+#include "ext-environment-common.h"
+
+struct ext_environment_interpreter_context;
+
+/*
+ * Core environment items
+ */
+
+static const struct sieve_environment_item *core_env_items[] = {
+	&domain_env_item,
+	&host_env_item,
+	&location_env_item,
+	&phase_env_item,
+	&name_env_item,
+	&version_env_item
+};
+
+static unsigned int core_env_items_count = N_ELEMENTS(core_env_items);
+
+static void
+sieve_environment_item_insert(struct ext_environment_interpreter_context *ctx,
+			      const struct sieve_environment_item *item);
+
+/*
+ * Validator context
+ */
+
+struct ext_environment_interpreter_context {
+	HASH_TABLE(const char *,
+		   const struct sieve_environment_item *) name_items;
+	ARRAY(const struct sieve_environment_item *) prefix_items;
+
+	bool active:1;
+};
+
+static void
+ext_environment_interpreter_extension_free(const struct sieve_extension *ext,
+					   struct sieve_interpreter *interp,
+					   void *context);
+
+struct sieve_interpreter_extension environment_interpreter_extension = {
+	.ext_def = &environment_extension,
+	.free = ext_environment_interpreter_extension_free,
+};
+
+static struct ext_environment_interpreter_context *
+ext_environment_interpreter_context_create(
+	const struct sieve_extension *this_ext,
+	struct sieve_interpreter *interp)
+{
+	pool_t pool = sieve_interpreter_pool(interp);
+	struct ext_environment_interpreter_context *ctx;
+
+	ctx = p_new(pool, struct ext_environment_interpreter_context, 1);
+
+	hash_table_create(&ctx->name_items, default_pool, 0, str_hash, strcmp);
+	i_array_init(&ctx->prefix_items, 16);
+
+	sieve_interpreter_extension_register(interp, this_ext,
+					     &environment_interpreter_extension,
+					     (void *)ctx);
+	return ctx;
+}
+
+static void
+ext_environment_interpreter_extension_free(
+	const struct sieve_extension *ext ATTR_UNUSED,
+	struct sieve_interpreter *interp ATTR_UNUSED, void *context)
+{
+	struct ext_environment_interpreter_context *ctx =
+		(struct ext_environment_interpreter_context *)context;
+
+	hash_table_destroy(&ctx->name_items);
+	array_free(&ctx->prefix_items);
+}
+
+static struct ext_environment_interpreter_context *
+ext_environment_interpreter_context_get(const struct sieve_extension *this_ext,
+					struct sieve_interpreter *interp)
+{
+	struct ext_environment_interpreter_context *ctx =
+		(struct ext_environment_interpreter_context *)
+		sieve_interpreter_extension_get_context(interp, this_ext);
+
+	if (ctx == NULL) {
+		ctx = ext_environment_interpreter_context_create(
+			this_ext, interp);
+	}
+	return ctx;
+}
+
+void ext_environment_interpreter_init(const struct sieve_extension *this_ext,
+				      struct sieve_interpreter *interp)
+{
+	struct ext_environment_interpreter_context *ctx;
+	unsigned int i;
+
+	/* Create our context */
+	ctx = ext_environment_interpreter_context_get(this_ext, interp);
+
+	for (i = 0; i < core_env_items_count; i++)
+		sieve_environment_item_insert(ctx, core_env_items[i]);
+
+	ctx->active = TRUE;
+}
+
+bool sieve_ext_environment_is_active(const struct sieve_extension *env_ext,
+				     struct sieve_interpreter *interp)
+{
+	struct ext_environment_interpreter_context *ctx =
+		ext_environment_interpreter_context_get(env_ext, interp);
+
+	return (ctx != NULL && ctx->active);
+}
+
+/*
+ * Registration
+ */
+
+static void
+sieve_environment_item_insert(struct ext_environment_interpreter_context *ctx,
+			      const struct sieve_environment_item *item)
+{
+	if (!item->prefix)
+		hash_table_insert(ctx->name_items, item->name, item);
+	else
+		array_append(&ctx->prefix_items, &item, 1);
+}
+
+void sieve_environment_item_register(const struct sieve_extension *env_ext,
+				     struct sieve_interpreter *interp,
+				     const struct sieve_environment_item *item)
+{
+	struct ext_environment_interpreter_context *ctx;
+
+	i_assert(sieve_extension_is(env_ext, environment_extension));
+	ctx = ext_environment_interpreter_context_get(env_ext, interp);
+
+	sieve_environment_item_insert(ctx, item);
+}
+
+/*
+ * Retrieval
+ */
+
+static const struct sieve_environment_item *
+ext_environment_item_lookup(struct ext_environment_interpreter_context *ctx,
+			    const char **_name)
+{
+	const struct sieve_environment_item *item;
+	const char *name = *_name;
+
+	item = hash_table_lookup(ctx->name_items, name);
+	if (item != NULL)
+		return item;
+
+	array_foreach_elem(&ctx->prefix_items, item) {
+		size_t prefix_len;
+
+		i_assert(item->prefix);
+		prefix_len = strlen(item->name);
+
+		if (str_begins(name, item->name)) {
+			if (name[prefix_len] == '.') {
+				*_name = &name[prefix_len+1];
+				return item;
+			} else if (name[prefix_len] == '\0') {
+				*_name = &name[prefix_len+1];
+				return item;
+			}
+		}
+	}
+	return NULL;
+}
+
+const char *
+ext_environment_item_get_value(const struct sieve_extension *env_ext,
+			       const struct sieve_runtime_env *renv,
+			       const char *name)
+{
+	struct ext_environment_interpreter_context *ctx;
+	const struct sieve_environment_item *item;
+
+	i_assert(sieve_extension_is(env_ext, environment_extension));
+	ctx = ext_environment_interpreter_context_get(env_ext, renv->interp);
+
+	item = ext_environment_item_lookup(ctx, &name);
+	if (item == NULL)
+		return NULL;
+
+	if (item->value != NULL)
+		return item->value;
+	if (item->get_value != NULL)
+		return item->get_value(renv, name);
+	return NULL;
+}
+
+/*
+ * Default environment items
+ */
+
+/* "domain":
+
+     The primary DNS domain associated with the Sieve execution context, usually
+     but not always a proper suffix of the host name.
+ */
+
+static const char *
+envit_domain_get_value(const struct sieve_runtime_env *renv,
+		       const char *name ATTR_UNUSED)
+{
+	const struct sieve_execute_env *eenv = renv->exec_env;
+
+	return eenv->svinst->domainname;
+}
+
+const struct sieve_environment_item domain_env_item = {
+	.name = "domain",
+	.get_value = envit_domain_get_value,
+};
+
+/* "host":
+
+     The fully-qualified domain name of the host where the Sieve script is
+     executing.
+ */
+
+static const char *
+envit_host_get_value(const struct sieve_runtime_env *renv,
+		     const char *name ATTR_UNUSED)
+{
+	const struct sieve_execute_env *eenv = renv->exec_env;
+
+	return eenv->svinst->hostname;
+}
+
+const struct sieve_environment_item host_env_item = {
+	.name = "host",
+	.get_value = envit_host_get_value,
+};
+
+/* "location":
+
+     Sieve evaluation can be performed at various different points as messages
+     are processed. This item provides additional information about the type of
+     service that is evaluating the script.  Possible values are:
+      "MTA" - the Sieve script is being evaluated by a Message Transfer Agent
+      "MDA" - evaluation is being performed by a Mail Delivery Agent
+      "MUA" - evaluation is being performed by a Mail User Agent (right...)
+      "MS"  - evaluation is being performed by a Message Store
+ */
+
+static const char *
+envit_location_get_value(const struct sieve_runtime_env *renv,
+			 const char *name ATTR_UNUSED)
+{
+	const struct sieve_execute_env *eenv = renv->exec_env;
+
+	switch (eenv->svinst->env_location ) {
+	case SIEVE_ENV_LOCATION_MDA:
+		return "MDA";
+	case SIEVE_ENV_LOCATION_MTA:
+		return "MTA";
+	case SIEVE_ENV_LOCATION_MS:
+		return "MS";
+	default:
+		break;
+	}
+	return NULL;
+}
+
+const struct sieve_environment_item location_env_item = {
+	.name = "location",
+	.get_value = envit_location_get_value
+};
+
+/* "phase":
+
+     The point relative to final delivery where the Sieve script is being
+     evaluated.  Possible values are "pre", "during", and "post", referring
+     respectively to processing before, during, and after final delivery has
+     taken place.
+ */
+
+static const char *
+envit_phase_get_value(const struct sieve_runtime_env *renv,
+		      const char *name ATTR_UNUSED)
+{
+	const struct sieve_execute_env *eenv = renv->exec_env;
+
+	switch (eenv->svinst->delivery_phase) {
+	case SIEVE_DELIVERY_PHASE_PRE:
+		return "pre";
+	case SIEVE_DELIVERY_PHASE_DURING:
+		return "during";
+	case SIEVE_DELIVERY_PHASE_POST:
+		return "post";
+	default:
+		break;
+	}
+	return NULL;
+}
+
+const struct sieve_environment_item phase_env_item = {
+	.name = "phase",
+	.get_value = envit_phase_get_value
+};
+
+/* "name":
+
+    The product name associated with the Sieve interpreter.
+ */
+
+const struct sieve_environment_item name_env_item = {
+	.name = "name",
+	.value = PIGEONHOLE_NAME" Sieve"
+};
+
+/* "version":
+
+   The product version associated with the Sieve interpreter. The meaning of the
+   product version string is product-specific and should always be considered
+   in the context of the product name given by the "name" item.
+ */
+
+const struct sieve_environment_item version_env_item = {
+	.name = "version",
+	.value = PIGEONHOLE_VERSION,
+};
diff --git a/pigeonhole/src/lib-sieve/plugins/environment/ext-environment-common.h b/pigeonhole/src/lib-sieve/plugins/environment/ext-environment-common.h
new file mode 100644
index 0000000..288b82e
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/ext-environment-common.h
@@ -0,0 +1,53 @@
+#ifndef EXT_ENVIRONMENT_COMMON_H
+#define EXT_ENVIRONMENT_COMMON_H
+
+#include "lib.h"
+
+#include "sieve-common.h"
+
+#include "sieve-ext-environment.h"
+
+/*
+ * Extension
+ */
+
+extern const struct sieve_extension_def environment_extension;
+
+/*
+ * Commands
+ */
+
+extern const struct sieve_command_def tst_environment;
+
+/*
+ * Operations
+ */
+
+extern const struct sieve_operation_def tst_environment_operation;
+
+/*
+ * Environment items
+ */
+
+extern const struct sieve_environment_item domain_env_item;
+extern const struct sieve_environment_item host_env_item;
+extern const struct sieve_environment_item location_env_item;
+extern const struct sieve_environment_item phase_env_item;
+extern const struct sieve_environment_item name_env_item;
+extern const struct sieve_environment_item version_env_item;
+
+/*
+ * Initialization
+ */
+
+bool ext_environment_init(const struct sieve_extension *ext, void **context);
+void ext_environment_deinit(const struct sieve_extension *ext);
+
+/*
+ * Validator context
+ */
+
+void ext_environment_interpreter_init(const struct sieve_extension *this_ext,
+				      struct sieve_interpreter *interp);
+
+#endif
diff --git a/pigeonhole/src/lib-sieve/plugins/environment/ext-environment.c b/pigeonhole/src/lib-sieve/plugins/environment/ext-environment.c
new file mode 100644
index 0000000..c2130a2
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/ext-environment.c
@@ -0,0 +1,59 @@
+/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
+ */
+
+/* Extension variables
+ * -------------------
+ *
+ * Authors: Stephan Bosch
+ * Specification: RFC 5183
+ * Implementation: full
+ * Status: testing
+ *
+ */
+
+#include "lib.h"
+#include "str.h"
+#include "unichar.h"
+
+#include "sieve-extensions.h"
+#include "sieve-commands.h"
+#include "sieve-binary.h"
+#include "sieve-interpreter.h"
+
+#include "sieve-validator.h"
+
+#include "ext-environment-common.h"
+
+/*
+ * Extension
+ */
+
+static bool ext_environment_validator_load
+	(const struct sieve_extension *ext, struct sieve_validator *valdtr);
+static bool ext_environment_interpreter_load
+(const struct sieve_extension *ext,
+	const struct sieve_runtime_env *renv, sieve_size_t *address);
+
+const struct sieve_extension_def environment_extension = {
+	.name = "environment",
+	.validator_load = ext_environment_validator_load,
+	.interpreter_load = ext_environment_interpreter_load,
+	SIEVE_EXT_DEFINE_OPERATION(tst_environment_operation)
+};
+
+static bool ext_environment_validator_load
+(const struct sieve_extension *ext, struct sieve_validator *valdtr)
+{
+	sieve_validator_register_command(valdtr, ext, &tst_environment);
+	return TRUE;
+}
+
+static bool ext_environment_interpreter_load
+(const struct sieve_extension *ext,
+	const struct sieve_runtime_env *renv,
+	sieve_size_t *address ATTR_UNUSED)
+{
+	ext_environment_interpreter_init(ext, renv->interp);
+	return TRUE;
+}
+
diff --git a/pigeonhole/src/lib-sieve/plugins/environment/sieve-ext-environment.h b/pigeonhole/src/lib-sieve/plugins/environment/sieve-ext-environment.h
new file mode 100644
index 0000000..8ae0d18
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/sieve-ext-environment.h
@@ -0,0 +1,54 @@
+#ifndef SIEVE_EXT_ENVIRONMENT_H
+#define SIEVE_EXT_ENVIRONMENT_H
+
+#include "sieve-common.h"
+
+/*
+ * Environment extension
+ */
+
+/* FIXME: this is not suitable for future plugin support */
+
+extern const struct sieve_extension_def environment_extension;
+
+static inline const struct sieve_extension *
+sieve_ext_environment_get_extension
+(struct sieve_instance *svinst)
+{
+	return sieve_extension_register
+		(svinst, &environment_extension, FALSE);
+}
+
+static inline const struct sieve_extension *
+sieve_ext_environment_require_extension
+(struct sieve_instance *svinst)
+{
+	return sieve_extension_require
+		(svinst, &environment_extension, TRUE);
+}
+
+bool sieve_ext_environment_is_active
+	(const struct sieve_extension *env_ext,
+		struct sieve_interpreter *interp);
+
+/*
+ * Environment item
+ */
+
+struct sieve_environment_item {
+	const char *name;
+	bool prefix;
+
+	const char *value;
+	const char *(*get_value)
+		(const struct sieve_runtime_env *renv, const char *name);
+};
+
+void sieve_environment_item_register
+	(const struct sieve_extension *env_ext, struct sieve_interpreter *interp,
+		const struct sieve_environment_item *item);
+const char *ext_environment_item_get_value
+	(const struct sieve_extension *env_ext,
+		const struct sieve_runtime_env *renv, const char *name);
+
+#endif
diff --git a/pigeonhole/src/lib-sieve/plugins/environment/tst-environment.c b/pigeonhole/src/lib-sieve/plugins/environment/tst-environment.c
new file mode 100644
index 0000000..9eaa099
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/plugins/environment/tst-environment.c
@@ -0,0 +1,215 @@
+/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
+ */
+
+#include "lib.h"
+#include "str-sanitize.h"
+
+#include "sieve-common.h"
+#include "sieve-commands.h"
+#include "sieve-stringlist.h"
+#include "sieve-code.h"
+#include "sieve-comparators.h"
+#include "sieve-match-types.h"
+#include "sieve-validator.h"
+#include "sieve-generator.h"
+#include "sieve-interpreter.h"
+#include "sieve-dump.h"
+#include "sieve-match.h"
+
+#include "ext-environment-common.h"
+
+/*
+ * Environment test
+ *
+ * Syntax:
+ *   environment [COMPARATOR] [MATCH-TYPE]
+ *      <name: string> <key-list: string-list>
+ */
+
+static bool tst_environment_registered
+	(struct sieve_validator *valdtr, const struct sieve_extension *ext,
+		struct sieve_command_registration *cmd_reg);
+static bool tst_environment_validate
+	(struct sieve_validator *valdtr, struct sieve_command *tst);
+static bool tst_environment_generate
+	(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd);
+
+const struct sieve_command_def tst_environment = {
+	.identifier = "environment",
+	.type = SCT_TEST,
+	.positional_args = 2,
+	.subtests = 0,
+	.block_allowed = FALSE,
+	.block_required = FALSE,
+	.registered = tst_environment_registered,
+	.validate = tst_environment_validate,
+	.generate = tst_environment_generate
+};
+
+/*
+ * Environment operation
+ */
+
+static bool tst_environment_operation_dump
+	(const struct sieve_dumptime_env *denv, sieve_size_t *address);
+static int tst_environment_operation_execute
+	(const struct sieve_runtime_env *renv, sieve_size_t *address);
+
+const struct sieve_operation_def tst_environment_operation = {
+	.mnemonic = "ENVIRONMENT",
+	.ext_def = &environment_extension,
+	.dump = tst_environment_operation_dump,
+	.execute = tst_environment_operation_execute
+};
+
+/*
+ * Test registration
+ */
+
+static bool tst_environment_registered
+(struct sieve_validator *valdtr, const struct sieve_extension *ext ATTR_UNUSED,
+	struct sieve_command_registration *cmd_reg)
+{
+	/* The order of these is not significant */
+	sieve_comparators_link_tag(valdtr, cmd_reg, SIEVE_MATCH_OPT_COMPARATOR);
+	sieve_match_types_link_tags(valdtr, cmd_reg, SIEVE_MATCH_OPT_MATCH_TYPE);
+
+	return TRUE;
+}
+
+/*
+ * Test validation
+ */
+
+static bool tst_environment_validate
+(struct sieve_validator *valdtr, struct sieve_command *tst)
+{
+	struct sieve_ast_argument *arg = tst->first_positional;
+	const struct sieve_match_type mcht_default =
+		SIEVE_MATCH_TYPE_DEFAULT(is_match_type);
+	const struct sieve_comparator cmp_default =
+		SIEVE_COMPARATOR_DEFAULT(i_ascii_casemap_comparator);
+
+	if ( !sieve_validate_positional_argument
+		(valdtr, tst, arg, "name", 1, SAAT_STRING) ) {
+		return FALSE;
+	}
+
+	if ( !sieve_validator_argument_activate(valdtr, tst, arg, FALSE) )
+		return FALSE;
+
+	arg = sieve_ast_argument_next(arg);
+
+	if ( !sieve_validate_positional_argument
+		(valdtr, tst, arg, "key list", 2, SAAT_STRING_LIST) ) {
+		return FALSE;
+	}
+
+	if ( !sieve_validator_argument_activate(valdtr, tst, arg, FALSE) )
+		return FALSE;
+
+	/* Validate the key argument to a specified match type */
+	return sieve_match_type_validate
+		(valdtr, tst, arg, &mcht_default, &cmp_default);
+}
+
+/*
+ * Test generation
+ */
+
+static bool tst_environment_generate
+	(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd)
+{
+	sieve_operation_emit(cgenv->sblock, cmd->ext, &tst_environment_operation);
+
+ 	/* Generate arguments */
+	if ( !sieve_generate_arguments(cgenv, cmd, NULL) )
+		return FALSE;
+
+	return TRUE;
+}
+
+/*
+ * Code dump
+ */
+
+static bool tst_environment_operation_dump
+(const struct sieve_dumptime_env *denv, sieve_size_t *address)
+{
+	sieve_code_dumpf(denv, "ENVIRONMENT");
+	sieve_code_descend(denv);
+
+	/* Optional operands */
+	if ( sieve_match_opr_optional_dump(denv, address, NULL) != 0 )
+		return FALSE;
+
+	return
+		sieve_opr_string_dump(denv, address, "name") &&
+		sieve_opr_stringlist_dump(denv, address, "key list");
+}
+
+/*
+ * Code execution
+ */
+
+static int tst_environment_operation_execute
+(const struct sieve_runtime_env *renv, sieve_size_t *address)
+{
+	const struct sieve_extension *this_ext = renv->oprtn->ext;
+	struct sieve_match_type mcht =
+		SIEVE_MATCH_TYPE_DEFAULT(is_match_type);
+	struct sieve_comparator cmp =
+		SIEVE_COMPARATOR_DEFAULT(i_ascii_casemap_comparator);
+	string_t *name;
+	struct sieve_stringlist *value_list, *key_list;
+	const char *env_item;
+	int match, ret;
+
+	/*
+	 * Read operands
+	 */
+
+	/* Handle match-type and comparator operands */
+	if ( sieve_match_opr_optional_read
+		(renv, address, NULL, &ret, &cmp, &mcht) < 0 )
+		return ret;
+
+	/* Read source */
+	if ( (ret=sieve_opr_string_read(renv, address, "name", &name)) <= 0 )
+		return ret;
+
+	/* Read key-list */
+	if ( (ret=sieve_opr_stringlist_read(renv, address, "key-list", &key_list))
+		<= 0 )
+		return ret;
+
+	/*
+	 * Perform operation
+	 */
+
+	sieve_runtime_trace(renv, SIEVE_TRLVL_TESTS, "environment test");
+
+	env_item = ext_environment_item_get_value
+		(this_ext, renv, str_c(name));
+
+	if ( env_item != NULL ) {
+		/* Construct value list */
+		value_list = sieve_single_stringlist_create_cstr(renv, env_item, FALSE);
+
+		/* Perform match */
+		if ( (match=sieve_match(renv, &mcht, &cmp, value_list, key_list, &ret))
+			< 0 )
+			return ret;
+	} else {
+		match = 0;
+
+		sieve_runtime_trace_descend(renv);
+		sieve_runtime_trace(renv, SIEVE_TRLVL_TESTS,
+			"environment item `%s' not found",
+			str_sanitize(str_c(name), 128));
+	}
+
+	/* Set test result for subsequent conditional jump */
+	sieve_interpreter_set_test_result(renv->interp, match > 0);
+	return SIEVE_EXEC_OK;
+}