1 files changed, 26 insertions, 0 deletions
diff --git a/userland/libc/include/tb/sha1.h b/userland/libc/include/tb/sha1.h
new file mode 100644
index 0000000..fe84196
--- /dev/null
+++ b/userland/libc/include/tb/sha1.h
@@ -0,0 +1,26 @@
+//
+// Copyright (C) 2022-2023 by Anton Kling <anton@kling.gg>
+//
+// SPDX-License-Identifier: 0BSD
+//
+#ifndef SHA1
+#define SHA1
+#include <stddef.h>
+#include <stdint.h>
+
+#define BLOCK_BYTES (64) /* 512/8 */
+#define SHA1_LEN (20)
+
+typedef struct SHA1_CTX {
+  uint32_t h[5];
+  uint8_t block[BLOCK_BYTES];
+  uint64_t active_len;
+  uint64_t len;
+} SHA1_CTX;
+
+void SHA1_Init(SHA1_CTX *ctx);
+void SHA1_Update(SHA1_CTX *ctx, const void *data, uint64_t len);
+void SHA1_Final(SHA1_CTX *ctx, unsigned char *message_digest);
+void SHA1_HMAC(unsigned char *message, uint64_t message_len, unsigned char *key,
+               uint64_t key_len, uint8_t output[SHA1_LEN]);
+#endif