1 files changed, 20 insertions, 0 deletions
diff --git a/sha256.h b/sha256.h
new file mode 100644
index 0000000..50c1638
--- /dev/null
+++ b/sha256.h
@@ -0,0 +1,20 @@
+#ifndef REPREPRO_SHA256_H
+#define REPREPRO_SHA256_H
+
+/* Structure to save state of computation between the single steps.  */
+struct SHA256_Context
+{
+  uint32_t H[8];
+
+  uint64_t total;
+  uint32_t buflen;
+  char buffer[128]; /* NB: always correctly aligned for uint32_t.  */
+};
+
+#define SHA256_DIGEST_SIZE 32
+
+void SHA256Init(/*@out@*/struct SHA256_Context *context);
+void SHA256Update(struct SHA256_Context *context, const uint8_t *data, size_t len);
+void SHA256Final(struct SHA256_Context *context, /*@out@*/uint8_t digest[SHA256_DIGEST_SIZE]);
+
+#endif