1 files changed, 38 insertions, 0 deletions
diff --git a/src/include/common/cryptohash.h b/src/include/common/cryptohash.h
new file mode 100644
index 0000000..541dc84
--- /dev/null
+++ b/src/include/common/cryptohash.h
@@ -0,0 +1,38 @@
+/*-------------------------------------------------------------------------
+ *
+ * cryptohash.h
+ *	  Generic headers for cryptographic hash functions.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *		  src/include/common/cryptohash.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef PG_CRYPTOHASH_H
+#define PG_CRYPTOHASH_H
+
+/* Context Structures for each hash function */
+typedef enum
+{
+	PG_MD5 = 0,
+	PG_SHA1,
+	PG_SHA224,
+	PG_SHA256,
+	PG_SHA384,
+	PG_SHA512
+} pg_cryptohash_type;
+
+/* opaque context, private to each cryptohash implementation */
+typedef struct pg_cryptohash_ctx pg_cryptohash_ctx;
+
+extern pg_cryptohash_ctx *pg_cryptohash_create(pg_cryptohash_type type);
+extern int	pg_cryptohash_init(pg_cryptohash_ctx *ctx);
+extern int	pg_cryptohash_update(pg_cryptohash_ctx *ctx, const uint8 *data, size_t len);
+extern int	pg_cryptohash_final(pg_cryptohash_ctx *ctx, uint8 *dest, size_t len);
+extern void pg_cryptohash_free(pg_cryptohash_ctx *ctx);
+
+#endif							/* PG_CRYPTOHASH_H */