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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /include/crypto/sha256_base.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/crypto/sha256_base.h')
-rw-r--r--include/crypto/sha256_base.h135
1 files changed, 135 insertions, 0 deletions
diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h
new file mode 100644
index 0000000000..ab904d8223
--- /dev/null
+++ b/include/crypto/sha256_base.h
@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * sha256_base.h - core logic for SHA-256 implementations
+ *
+ * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
+ */
+
+#ifndef _CRYPTO_SHA256_BASE_H
+#define _CRYPTO_SHA256_BASE_H
+
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+#include <crypto/internal/hash.h>
+#include <crypto/sha2.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+typedef void (sha256_block_fn)(struct sha256_state *sst, u8 const *src,
+ int blocks);
+
+static inline int sha224_base_init(struct shash_desc *desc)
+{
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+
+ sha224_init(sctx);
+ return 0;
+}
+
+static inline int sha256_base_init(struct shash_desc *desc)
+{
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+
+ sha256_init(sctx);
+ return 0;
+}
+
+static inline int lib_sha256_base_do_update(struct sha256_state *sctx,
+ const u8 *data,
+ unsigned int len,
+ sha256_block_fn *block_fn)
+{
+ unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
+
+ sctx->count += len;
+
+ if (unlikely((partial + len) >= SHA256_BLOCK_SIZE)) {
+ int blocks;
+
+ if (partial) {
+ int p = SHA256_BLOCK_SIZE - partial;
+
+ memcpy(sctx->buf + partial, data, p);
+ data += p;
+ len -= p;
+
+ block_fn(sctx, sctx->buf, 1);
+ }
+
+ blocks = len / SHA256_BLOCK_SIZE;
+ len %= SHA256_BLOCK_SIZE;
+
+ if (blocks) {
+ block_fn(sctx, data, blocks);
+ data += blocks * SHA256_BLOCK_SIZE;
+ }
+ partial = 0;
+ }
+ if (len)
+ memcpy(sctx->buf + partial, data, len);
+
+ return 0;
+}
+
+static inline int sha256_base_do_update(struct shash_desc *desc,
+ const u8 *data,
+ unsigned int len,
+ sha256_block_fn *block_fn)
+{
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+
+ return lib_sha256_base_do_update(sctx, data, len, block_fn);
+}
+
+static inline int lib_sha256_base_do_finalize(struct sha256_state *sctx,
+ sha256_block_fn *block_fn)
+{
+ const int bit_offset = SHA256_BLOCK_SIZE - sizeof(__be64);
+ __be64 *bits = (__be64 *)(sctx->buf + bit_offset);
+ unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
+
+ sctx->buf[partial++] = 0x80;
+ if (partial > bit_offset) {
+ memset(sctx->buf + partial, 0x0, SHA256_BLOCK_SIZE - partial);
+ partial = 0;
+
+ block_fn(sctx, sctx->buf, 1);
+ }
+
+ memset(sctx->buf + partial, 0x0, bit_offset - partial);
+ *bits = cpu_to_be64(sctx->count << 3);
+ block_fn(sctx, sctx->buf, 1);
+
+ return 0;
+}
+
+static inline int sha256_base_do_finalize(struct shash_desc *desc,
+ sha256_block_fn *block_fn)
+{
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+
+ return lib_sha256_base_do_finalize(sctx, block_fn);
+}
+
+static inline int lib_sha256_base_finish(struct sha256_state *sctx, u8 *out,
+ unsigned int digest_size)
+{
+ __be32 *digest = (__be32 *)out;
+ int i;
+
+ for (i = 0; digest_size > 0; i++, digest_size -= sizeof(__be32))
+ put_unaligned_be32(sctx->state[i], digest++);
+
+ memzero_explicit(sctx, sizeof(*sctx));
+ return 0;
+}
+
+static inline int sha256_base_finish(struct shash_desc *desc, u8 *out)
+{
+ unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+
+ return lib_sha256_base_finish(sctx, out, digest_size);
+}
+
+#endif /* _CRYPTO_SHA256_BASE_H */