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-rw-r--r--lib/crypto/sha512.c423
1 files changed, 423 insertions, 0 deletions
diff --git a/lib/crypto/sha512.c b/lib/crypto/sha512.c
new file mode 100644
index 000000000000..d8062188be98
--- /dev/null
+++ b/lib/crypto/sha512.c
@@ -0,0 +1,423 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SHA-384, SHA-512, HMAC-SHA384, and HMAC-SHA512 library functions
+ *
+ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
+ * Copyright 2025 Google LLC
+ */
+
+#include <crypto/hmac.h>
+#include <crypto/sha2.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/overflow.h>
+#include <linux/string.h>
+#include <linux/unaligned.h>
+#include <linux/wordpart.h>
+
+static const struct sha512_block_state sha384_iv = {
+ .h = {
+ SHA384_H0, SHA384_H1, SHA384_H2, SHA384_H3,
+ SHA384_H4, SHA384_H5, SHA384_H6, SHA384_H7,
+ },
+};
+
+static const struct sha512_block_state sha512_iv = {
+ .h = {
+ SHA512_H0, SHA512_H1, SHA512_H2, SHA512_H3,
+ SHA512_H4, SHA512_H5, SHA512_H6, SHA512_H7,
+ },
+};
+
+static const u64 sha512_K[80] = {
+ 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
+ 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
+ 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
+ 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+ 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
+ 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
+ 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
+ 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+ 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
+ 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
+ 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
+ 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+ 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
+ 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
+ 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
+ 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+ 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
+ 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
+ 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
+ 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+ 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
+ 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
+ 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
+ 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+ 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
+ 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
+ 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
+};
+
+#define Ch(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
+#define Maj(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
+#define e0(x) (ror64((x), 28) ^ ror64((x), 34) ^ ror64((x), 39))
+#define e1(x) (ror64((x), 14) ^ ror64((x), 18) ^ ror64((x), 41))
+#define s0(x) (ror64((x), 1) ^ ror64((x), 8) ^ ((x) >> 7))
+#define s1(x) (ror64((x), 19) ^ ror64((x), 61) ^ ((x) >> 6))
+
+static void sha512_block_generic(struct sha512_block_state *state,
+ const u8 *data)
+{
+ u64 a = state->h[0];
+ u64 b = state->h[1];
+ u64 c = state->h[2];
+ u64 d = state->h[3];
+ u64 e = state->h[4];
+ u64 f = state->h[5];
+ u64 g = state->h[6];
+ u64 h = state->h[7];
+ u64 t1, t2;
+ u64 W[16];
+
+ for (int j = 0; j < 16; j++)
+ W[j] = get_unaligned_be64(data + j * sizeof(u64));
+
+ for (int i = 0; i < 80; i += 8) {
+ if ((i & 15) == 0 && i != 0) {
+ for (int j = 0; j < 16; j++) {
+ W[j & 15] += s1(W[(j - 2) & 15]) +
+ W[(j - 7) & 15] +
+ s0(W[(j - 15) & 15]);
+ }
+ }
+ t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[(i & 15)];
+ t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
+ t1 = g + e1(d) + Ch(d, e, f) + sha512_K[i+1] + W[(i & 15) + 1];
+ t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
+ t1 = f + e1(c) + Ch(c, d, e) + sha512_K[i+2] + W[(i & 15) + 2];
+ t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
+ t1 = e + e1(b) + Ch(b, c, d) + sha512_K[i+3] + W[(i & 15) + 3];
+ t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
+ t1 = d + e1(a) + Ch(a, b, c) + sha512_K[i+4] + W[(i & 15) + 4];
+ t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
+ t1 = c + e1(h) + Ch(h, a, b) + sha512_K[i+5] + W[(i & 15) + 5];
+ t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
+ t1 = b + e1(g) + Ch(g, h, a) + sha512_K[i+6] + W[(i & 15) + 6];
+ t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
+ t1 = a + e1(f) + Ch(f, g, h) + sha512_K[i+7] + W[(i & 15) + 7];
+ t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
+ }
+
+ state->h[0] += a;
+ state->h[1] += b;
+ state->h[2] += c;
+ state->h[3] += d;
+ state->h[4] += e;
+ state->h[5] += f;
+ state->h[6] += g;
+ state->h[7] += h;
+}
+
+static void __maybe_unused
+sha512_blocks_generic(struct sha512_block_state *state,
+ const u8 *data, size_t nblocks)
+{
+ do {
+ sha512_block_generic(state, data);
+ data += SHA512_BLOCK_SIZE;
+ } while (--nblocks);
+}
+
+#ifdef CONFIG_CRYPTO_LIB_SHA512_ARCH
+#include "sha512.h" /* $(SRCARCH)/sha512.h */
+#else
+#define sha512_blocks sha512_blocks_generic
+#endif
+
+static void __sha512_init(struct __sha512_ctx *ctx,
+ const struct sha512_block_state *iv,
+ u64 initial_bytecount)
+{
+ ctx->state = *iv;
+ ctx->bytecount_lo = initial_bytecount;
+ ctx->bytecount_hi = 0;
+}
+
+void sha384_init(struct sha384_ctx *ctx)
+{
+ __sha512_init(&ctx->ctx, &sha384_iv, 0);
+}
+EXPORT_SYMBOL_GPL(sha384_init);
+
+void sha512_init(struct sha512_ctx *ctx)
+{
+ __sha512_init(&ctx->ctx, &sha512_iv, 0);
+}
+EXPORT_SYMBOL_GPL(sha512_init);
+
+void __sha512_update(struct __sha512_ctx *ctx, const u8 *data, size_t len)
+{
+ size_t partial = ctx->bytecount_lo % SHA512_BLOCK_SIZE;
+
+ if (check_add_overflow(ctx->bytecount_lo, len, &ctx->bytecount_lo))
+ ctx->bytecount_hi++;
+
+ if (partial + len >= SHA512_BLOCK_SIZE) {
+ size_t nblocks;
+
+ if (partial) {
+ size_t l = SHA512_BLOCK_SIZE - partial;
+
+ memcpy(&ctx->buf[partial], data, l);
+ data += l;
+ len -= l;
+
+ sha512_blocks(&ctx->state, ctx->buf, 1);
+ }
+
+ nblocks = len / SHA512_BLOCK_SIZE;
+ len %= SHA512_BLOCK_SIZE;
+
+ if (nblocks) {
+ sha512_blocks(&ctx->state, data, nblocks);
+ data += nblocks * SHA512_BLOCK_SIZE;
+ }
+ partial = 0;
+ }
+ if (len)
+ memcpy(&ctx->buf[partial], data, len);
+}
+EXPORT_SYMBOL_GPL(__sha512_update);
+
+static void __sha512_final(struct __sha512_ctx *ctx,
+ u8 *out, size_t digest_size)
+{
+ u64 bitcount_hi = (ctx->bytecount_hi << 3) | (ctx->bytecount_lo >> 61);
+ u64 bitcount_lo = ctx->bytecount_lo << 3;
+ size_t partial = ctx->bytecount_lo % SHA512_BLOCK_SIZE;
+
+ ctx->buf[partial++] = 0x80;
+ if (partial > SHA512_BLOCK_SIZE - 16) {
+ memset(&ctx->buf[partial], 0, SHA512_BLOCK_SIZE - partial);
+ sha512_blocks(&ctx->state, ctx->buf, 1);
+ partial = 0;
+ }
+ memset(&ctx->buf[partial], 0, SHA512_BLOCK_SIZE - 16 - partial);
+ *(__be64 *)&ctx->buf[SHA512_BLOCK_SIZE - 16] = cpu_to_be64(bitcount_hi);
+ *(__be64 *)&ctx->buf[SHA512_BLOCK_SIZE - 8] = cpu_to_be64(bitcount_lo);
+ sha512_blocks(&ctx->state, ctx->buf, 1);
+
+ for (size_t i = 0; i < digest_size; i += 8)
+ put_unaligned_be64(ctx->state.h[i / 8], out + i);
+}
+
+void sha384_final(struct sha384_ctx *ctx, u8 out[SHA384_DIGEST_SIZE])
+{
+ __sha512_final(&ctx->ctx, out, SHA384_DIGEST_SIZE);
+ memzero_explicit(ctx, sizeof(*ctx));
+}
+EXPORT_SYMBOL_GPL(sha384_final);
+
+void sha512_final(struct sha512_ctx *ctx, u8 out[SHA512_DIGEST_SIZE])
+{
+ __sha512_final(&ctx->ctx, out, SHA512_DIGEST_SIZE);
+ memzero_explicit(ctx, sizeof(*ctx));
+}
+EXPORT_SYMBOL_GPL(sha512_final);
+
+void sha384(const u8 *data, size_t len, u8 out[SHA384_DIGEST_SIZE])
+{
+ struct sha384_ctx ctx;
+
+ sha384_init(&ctx);
+ sha384_update(&ctx, data, len);
+ sha384_final(&ctx, out);
+}
+EXPORT_SYMBOL_GPL(sha384);
+
+void sha512(const u8 *data, size_t len, u8 out[SHA512_DIGEST_SIZE])
+{
+ struct sha512_ctx ctx;
+
+ sha512_init(&ctx);
+ sha512_update(&ctx, data, len);
+ sha512_final(&ctx, out);
+}
+EXPORT_SYMBOL_GPL(sha512);
+
+static void __hmac_sha512_preparekey(struct sha512_block_state *istate,
+ struct sha512_block_state *ostate,
+ const u8 *raw_key, size_t raw_key_len,
+ const struct sha512_block_state *iv)
+{
+ union {
+ u8 b[SHA512_BLOCK_SIZE];
+ unsigned long w[SHA512_BLOCK_SIZE / sizeof(unsigned long)];
+ } derived_key = { 0 };
+
+ if (unlikely(raw_key_len > SHA512_BLOCK_SIZE)) {
+ if (iv == &sha384_iv)
+ sha384(raw_key, raw_key_len, derived_key.b);
+ else
+ sha512(raw_key, raw_key_len, derived_key.b);
+ } else {
+ memcpy(derived_key.b, raw_key, raw_key_len);
+ }
+
+ for (size_t i = 0; i < ARRAY_SIZE(derived_key.w); i++)
+ derived_key.w[i] ^= REPEAT_BYTE(HMAC_IPAD_VALUE);
+ *istate = *iv;
+ sha512_blocks(istate, derived_key.b, 1);
+
+ for (size_t i = 0; i < ARRAY_SIZE(derived_key.w); i++)
+ derived_key.w[i] ^= REPEAT_BYTE(HMAC_OPAD_VALUE ^
+ HMAC_IPAD_VALUE);
+ *ostate = *iv;
+ sha512_blocks(ostate, derived_key.b, 1);
+
+ memzero_explicit(&derived_key, sizeof(derived_key));
+}
+
+void hmac_sha384_preparekey(struct hmac_sha384_key *key,
+ const u8 *raw_key, size_t raw_key_len)
+{
+ __hmac_sha512_preparekey(&key->key.istate, &key->key.ostate,
+ raw_key, raw_key_len, &sha384_iv);
+}
+EXPORT_SYMBOL_GPL(hmac_sha384_preparekey);
+
+void hmac_sha512_preparekey(struct hmac_sha512_key *key,
+ const u8 *raw_key, size_t raw_key_len)
+{
+ __hmac_sha512_preparekey(&key->key.istate, &key->key.ostate,
+ raw_key, raw_key_len, &sha512_iv);
+}
+EXPORT_SYMBOL_GPL(hmac_sha512_preparekey);
+
+void __hmac_sha512_init(struct __hmac_sha512_ctx *ctx,
+ const struct __hmac_sha512_key *key)
+{
+ __sha512_init(&ctx->sha_ctx, &key->istate, SHA512_BLOCK_SIZE);
+ ctx->ostate = key->ostate;
+}
+EXPORT_SYMBOL_GPL(__hmac_sha512_init);
+
+void hmac_sha384_init_usingrawkey(struct hmac_sha384_ctx *ctx,
+ const u8 *raw_key, size_t raw_key_len)
+{
+ __hmac_sha512_preparekey(&ctx->ctx.sha_ctx.state, &ctx->ctx.ostate,
+ raw_key, raw_key_len, &sha384_iv);
+ ctx->ctx.sha_ctx.bytecount_lo = SHA512_BLOCK_SIZE;
+ ctx->ctx.sha_ctx.bytecount_hi = 0;
+}
+EXPORT_SYMBOL_GPL(hmac_sha384_init_usingrawkey);
+
+void hmac_sha512_init_usingrawkey(struct hmac_sha512_ctx *ctx,
+ const u8 *raw_key, size_t raw_key_len)
+{
+ __hmac_sha512_preparekey(&ctx->ctx.sha_ctx.state, &ctx->ctx.ostate,
+ raw_key, raw_key_len, &sha512_iv);
+ ctx->ctx.sha_ctx.bytecount_lo = SHA512_BLOCK_SIZE;
+ ctx->ctx.sha_ctx.bytecount_hi = 0;
+}
+EXPORT_SYMBOL_GPL(hmac_sha512_init_usingrawkey);
+
+static void __hmac_sha512_final(struct __hmac_sha512_ctx *ctx,
+ u8 *out, size_t digest_size)
+{
+ /* Generate the padded input for the outer hash in ctx->sha_ctx.buf. */
+ __sha512_final(&ctx->sha_ctx, ctx->sha_ctx.buf, digest_size);
+ memset(&ctx->sha_ctx.buf[digest_size], 0,
+ SHA512_BLOCK_SIZE - digest_size);
+ ctx->sha_ctx.buf[digest_size] = 0x80;
+ *(__be32 *)&ctx->sha_ctx.buf[SHA512_BLOCK_SIZE - 4] =
+ cpu_to_be32(8 * (SHA512_BLOCK_SIZE + digest_size));
+
+ /* Compute the outer hash, which gives the HMAC value. */
+ sha512_blocks(&ctx->ostate, ctx->sha_ctx.buf, 1);
+ for (size_t i = 0; i < digest_size; i += 8)
+ put_unaligned_be64(ctx->ostate.h[i / 8], out + i);
+
+ memzero_explicit(ctx, sizeof(*ctx));
+}
+
+void hmac_sha384_final(struct hmac_sha384_ctx *ctx,
+ u8 out[SHA384_DIGEST_SIZE])
+{
+ __hmac_sha512_final(&ctx->ctx, out, SHA384_DIGEST_SIZE);
+}
+EXPORT_SYMBOL_GPL(hmac_sha384_final);
+
+void hmac_sha512_final(struct hmac_sha512_ctx *ctx,
+ u8 out[SHA512_DIGEST_SIZE])
+{
+ __hmac_sha512_final(&ctx->ctx, out, SHA512_DIGEST_SIZE);
+}
+EXPORT_SYMBOL_GPL(hmac_sha512_final);
+
+void hmac_sha384(const struct hmac_sha384_key *key,
+ const u8 *data, size_t data_len, u8 out[SHA384_DIGEST_SIZE])
+{
+ struct hmac_sha384_ctx ctx;
+
+ hmac_sha384_init(&ctx, key);
+ hmac_sha384_update(&ctx, data, data_len);
+ hmac_sha384_final(&ctx, out);
+}
+EXPORT_SYMBOL_GPL(hmac_sha384);
+
+void hmac_sha512(const struct hmac_sha512_key *key,
+ const u8 *data, size_t data_len, u8 out[SHA512_DIGEST_SIZE])
+{
+ struct hmac_sha512_ctx ctx;
+
+ hmac_sha512_init(&ctx, key);
+ hmac_sha512_update(&ctx, data, data_len);
+ hmac_sha512_final(&ctx, out);
+}
+EXPORT_SYMBOL_GPL(hmac_sha512);
+
+void hmac_sha384_usingrawkey(const u8 *raw_key, size_t raw_key_len,
+ const u8 *data, size_t data_len,
+ u8 out[SHA384_DIGEST_SIZE])
+{
+ struct hmac_sha384_ctx ctx;
+
+ hmac_sha384_init_usingrawkey(&ctx, raw_key, raw_key_len);
+ hmac_sha384_update(&ctx, data, data_len);
+ hmac_sha384_final(&ctx, out);
+}
+EXPORT_SYMBOL_GPL(hmac_sha384_usingrawkey);
+
+void hmac_sha512_usingrawkey(const u8 *raw_key, size_t raw_key_len,
+ const u8 *data, size_t data_len,
+ u8 out[SHA512_DIGEST_SIZE])
+{
+ struct hmac_sha512_ctx ctx;
+
+ hmac_sha512_init_usingrawkey(&ctx, raw_key, raw_key_len);
+ hmac_sha512_update(&ctx, data, data_len);
+ hmac_sha512_final(&ctx, out);
+}
+EXPORT_SYMBOL_GPL(hmac_sha512_usingrawkey);
+
+#ifdef sha512_mod_init_arch
+static int __init sha512_mod_init(void)
+{
+ sha512_mod_init_arch();
+ return 0;
+}
+subsys_initcall(sha512_mod_init);
+
+static void __exit sha512_mod_exit(void)
+{
+}
+module_exit(sha512_mod_exit);
+#endif
+
+MODULE_DESCRIPTION("SHA-384, SHA-512, HMAC-SHA384, and HMAC-SHA512 library functions");
+MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-07-29 20:03:13 +0000