chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/crypto/decrepit/cast/internal.h

@@ -0,0 +1,42 @@
+// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+#ifndef OPENSSL_HEADER_CAST_INTERNAL_H
+#define OPENSSL_HEADER_CAST_INTERNAL_H
+
+#include <openssl/base.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+struct cast_key_st {
+  uint32_t data[32];
+  int short_key;  // Use reduced rounds for short key
+} /* CAST_KEY */;
+
+extern const uint32_t CAST_S_table0[256];
+extern const uint32_t CAST_S_table1[256];
+extern const uint32_t CAST_S_table2[256];
+extern const uint32_t CAST_S_table3[256];
+extern const uint32_t CAST_S_table4[256];
+extern const uint32_t CAST_S_table5[256];
+extern const uint32_t CAST_S_table6[256];
+extern const uint32_t CAST_S_table7[256];
+
+#define CAST_BLOCK 8
+#define CAST_KEY_LENGTH 16
+
+void CAST_set_key(CAST_KEY *key, size_t len, const uint8_t *data);
+void CAST_ecb_encrypt(const uint8_t *in, uint8_t *out, const CAST_KEY *key,
+                      int enc);
+void CAST_encrypt(uint32_t *data, const CAST_KEY *key);
+void CAST_decrypt(uint32_t *data, const CAST_KEY *key);
+void CAST_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
+                      const CAST_KEY *ks, uint8_t *iv, int enc);
+
+#if defined(__cplusplus)
+} // extern C
+#endif
+
+#endif  // OPENSSL_HEADER_CAST_INTERNAL_H