64 lines
1.9 KiB
Diff
64 lines
1.9 KiB
Diff
From 2486d9b5ae015c1786cb84466a751da4bc0d7122 Mon Sep 17 00:00:00 2001
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From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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Date: Thu, 20 Jun 2024 20:10:09 +0300
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Subject: [PATCH] Disable SHA3 s390x acceleration for CSHAKE
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* cipher/keccak.c (keccak_final_s390x): Add assert check for
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expected SHAKE suffix.
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(_gcry_cshake_customize, cshake_hash_buffers): Disable s390x
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acceleration when selecting CSHAKE suffix.
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--
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Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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---
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cipher/keccak.c | 16 ++++++++++++++--
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1 file changed, 14 insertions(+), 2 deletions(-)
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diff --git a/cipher/keccak.c b/cipher/keccak.c
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index aaf83a62..44cc9f71 100644
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--- a/cipher/keccak.c
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+++ b/cipher/keccak.c
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@@ -745,6 +745,8 @@ keccak_final_s390x (void *context)
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}
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else
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{
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+ gcry_assert(ctx->suffix == SHAKE_DELIMITED_SUFFIX);
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+
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klmd_shake_execute (ctx->kimd_func, &ctx->state, NULL, 0, ctx->buf,
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ctx->count);
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ctx->count = 0;
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@@ -1497,9 +1499,14 @@ _gcry_cshake_customize (void *context, struct gcry_cshake_customization *p)
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/* No customization */
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return 0;
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+ ctx->suffix = CSHAKE_DELIMITED_SUFFIX;
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+#ifdef USE_S390X_CRYPTO
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+ /* CSHAKE suffix is not supported by s390x/kimd. */
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+ ctx->kimd_func = 0;
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+#endif
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+
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len_written = cshake_input_n (ctx, p->n, p->n_len);
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cshake_input_s (ctx, p->s, p->s_len, len_written);
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- ctx->suffix = CSHAKE_DELIMITED_SUFFIX;
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return 0;
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}
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@@ -1536,9 +1543,14 @@ cshake_hash_buffers (const gcry_md_spec_t *spec, void *outbuf, size_t nbytes,
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size_t s_len = iov[1].len;
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size_t len;
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+ ctx.suffix = CSHAKE_DELIMITED_SUFFIX;
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+#ifdef USE_S390X_CRYPTO
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+ /* CSHAKE suffix is not supported by s390x/kimd. */
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+ ctx.kimd_func = 0;
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+#endif
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+
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len = cshake_input_n (&ctx, n, n_len);
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cshake_input_s (&ctx, s, s_len, len);
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- ctx.suffix = CSHAKE_DELIMITED_SUFFIX;
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}
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iovcnt -= 2;
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iov += 2;
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--
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2.43.0
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