Adding upstream version 2.39.3.upstream/2.39.3

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

1 files changed, 62 insertions, 0 deletions

diff --git a/include/fileeq.h b/include/fileeq.h
new file mode 100644
index 0000000..df5e6d8
--- /dev/null
+++ b/include/fileeq.h
@@ -0,0 +1,62 @@
+
+/*
+ * No copyright is claimed.  This code is in the public domain; do with
+ * it what you wish.
+ */
+#ifndef UTIL_LINUX_FILEEQ
+#define UTIL_LINUX_FILEEQ
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#if defined(__linux__) && defined(HAVE_LINUX_IF_ALG_H)
+# define USE_FILEEQ_CRYPTOAPI 1
+#endif
+
+/* Number of bytes from the beginning of the file we always
+ * compare by memcmp() */
+#define UL_FILEEQ_INTROSIZ	32
+
+struct ul_fileeq_data {
+	unsigned char intro[UL_FILEEQ_INTROSIZ];
+	unsigned char *blocks;
+	size_t nblocks;
+	size_t maxblocks;
+	int fd;
+	const char *name;
+	bool is_eof;
+};
+
+struct ul_fileeq {
+	int fd_api;	/* Crypto socket */
+	int fd_cip;	/* Cipher handler */
+
+	size_t readsiz;
+	uint64_t filesiz;
+	uint64_t blocksmax;
+	const struct ul_fileeq_method *method;
+
+	/* UL_FILEEQ_MEMCMP buffers */
+	unsigned char *buf_a;
+	unsigned char *buf_b;
+	unsigned char *buf_last;
+};
+
+extern int ul_fileeq_init(struct ul_fileeq *eq, const char *method);
+extern void ul_fileeq_deinit(struct ul_fileeq *eq);
+
+
+extern int ul_fileeq_data_associated(struct ul_fileeq_data *data);
+extern void ul_fileeq_data_close_file(struct ul_fileeq_data *data);
+extern void ul_fileeq_data_init(struct ul_fileeq_data *data);
+extern void ul_fileeq_data_deinit(struct ul_fileeq_data *data);
+extern void ul_fileeq_data_set_file(struct ul_fileeq_data *data,
+				    const char *name);
+extern size_t ul_fileeq_set_size(struct ul_fileeq *eq, uint64_t filesiz,
+                                 size_t readsiz, size_t memsiz);
+
+extern int ul_fileeq(struct ul_fileeq *eq,
+              struct ul_fileeq_data *a, struct ul_fileeq_data *b);
+
+#endif /* UTIL_LINUX_FILEEQ */