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authorJason A. Donenfeld <Jason@zx2c4.com>2018-08-28 23:50:35 -0600
committerJason A. Donenfeld <Jason@zx2c4.com>2018-09-03 23:52:11 -0600
commit4a0e319af86c0d38304535293f6fc32fe436ef1d (patch)
tree6fca1e89becf3ff1afdcec7b6bc725e256af5811 /src/crypto/include/zinc/blake2s.h
parentuapi: reformat (diff)
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crypto: import zinc
Diffstat (limited to 'src/crypto/include/zinc/blake2s.h')
-rw-r--r--src/crypto/include/zinc/blake2s.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/crypto/include/zinc/blake2s.h b/src/crypto/include/zinc/blake2s.h
new file mode 100644
index 0000000..0e50836
--- /dev/null
+++ b/src/crypto/include/zinc/blake2s.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#ifndef _ZINC_BLAKE2S_H
+#define _ZINC_BLAKE2S_H
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <crypto/algapi.h>
+
+enum blake2s_lengths {
+ BLAKE2S_BLOCKBYTES = 64,
+ BLAKE2S_OUTBYTES = 32,
+ BLAKE2S_KEYBYTES = 32
+};
+
+struct blake2s_state {
+ u32 h[8];
+ u32 t[2];
+ u32 f[2];
+ u8 buf[BLAKE2S_BLOCKBYTES];
+ size_t buflen;
+ u8 last_node;
+};
+
+void blake2s_init(struct blake2s_state *state, const size_t outlen);
+void blake2s_init_key(struct blake2s_state *state, const size_t outlen,
+ const void *key, const size_t keylen);
+void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);
+void __blake2s_final(struct blake2s_state *state);
+static inline void blake2s_final(struct blake2s_state *state, u8 *out,
+ const size_t outlen)
+{
+ int i;
+
+#ifdef DEBUG
+ BUG_ON(!out || !outlen || outlen > BLAKE2S_OUTBYTES);
+#endif
+ __blake2s_final(state);
+
+ if (__builtin_constant_p(outlen) && !(outlen % sizeof(u32))) {
+ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) ||
+ IS_ALIGNED((unsigned long)out, __alignof__(u32))) {
+ __le32 *outwords = (__le32 *)out;
+
+ for (i = 0; i < outlen / sizeof(u32); ++i)
+ outwords[i] = cpu_to_le32(state->h[i]);
+ } else {
+ __le32 buffer[BLAKE2S_OUTBYTES];
+
+ for (i = 0; i < outlen / sizeof(u32); ++i)
+ buffer[i] = cpu_to_le32(state->h[i]);
+ memcpy(out, buffer, outlen);
+ memzero_explicit(buffer, sizeof(buffer));
+ }
+ } else {
+ u8 buffer[BLAKE2S_OUTBYTES] __aligned(__alignof__(u32));
+ __le32 *outwords = (__le32 *)buffer;
+
+ for (i = 0; i < 8; ++i)
+ outwords[i] = cpu_to_le32(state->h[i]);
+ memcpy(out, buffer, outlen);
+ memzero_explicit(buffer, sizeof(buffer));
+ }
+
+ memzero_explicit(state, sizeof(struct blake2s_state));
+}
+
+static inline void blake2s(u8 *out, const u8 *in, const u8 *key,
+ const size_t outlen, const size_t inlen,
+ const size_t keylen)
+{
+ struct blake2s_state state;
+
+#ifdef DEBUG
+ BUG_ON((!in && inlen > 0) || !out || !outlen ||
+ outlen > BLAKE2S_OUTBYTES || keylen > BLAKE2S_KEYBYTES ||
+ (!key && keylen));
+#endif
+
+ if (keylen)
+ blake2s_init_key(&state, outlen, key, keylen);
+ else
+ blake2s_init(&state, outlen);
+
+ blake2s_update(&state, in, inlen);
+ blake2s_final(&state, out, outlen);
+}
+
+void blake2s_hmac(u8 *out, const u8 *in, const u8 *key, const size_t outlen,
+ const size_t inlen, const size_t keylen);
+
+void blake2s_fpu_init(void);
+
+#ifdef DEBUG
+bool blake2s_selftest(void);
+#endif
+
+#endif /* _ZINC_BLAKE2S_H */