diff options
| author | Corentin Labbe <clabbe@baylibre.com> | 2020-02-24 14:47:41 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-03-06 12:28:21 +1100 |
| commit | d282eeeb112a00b05595a034ac4cae8532a4c2fc (patch) | |
| tree | 74a6449e6300e983b554984937958e7cb6eec2b1 /arch/arm64/crypto/sha2-ce-glue.c | |
| parent | 567be3a5d2270fb1971212f704240d6235a2c060 (diff) | |
crypto: arm64/sha-ce - implement export/import
When an ahash algorithm fallback to another ahash and that fallback is
shaXXX-CE, doing export/import lead to error like this:
alg: ahash: sha1-sun8i-ce export() overran state buffer on test vector 0, cfg=\"import/export\"
This is due to the descsize of shaxxx-ce being larger than struct shaxxx_state
off by an u32.
For fixing this, let's implement export/import which rip the finalize
variant instead of using generic export/import.
Fixes: 6ba6c74dfc6b ("arm64/crypto: SHA-224/SHA-256 using ARMv8 Crypto Extensions")
Fixes: 2c98833a42cd ("arm64/crypto: SHA-1 using ARMv8 Crypto Extensions")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm64/crypto/sha2-ce-glue.c')
| -rw-r--r-- | arch/arm64/crypto/sha2-ce-glue.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm64/crypto/sha2-ce-glue.c b/arch/arm64/crypto/sha2-ce-glue.c index a8e67bafba3d..9450d19b9e6e 100644 --- a/arch/arm64/crypto/sha2-ce-glue.c +++ b/arch/arm64/crypto/sha2-ce-glue.c @@ -109,12 +109,32 @@ static int sha256_ce_final(struct shash_desc *desc, u8 *out) return sha256_base_finish(desc, out); } +static int sha256_ce_export(struct shash_desc *desc, void *out) +{ + struct sha256_ce_state *sctx = shash_desc_ctx(desc); + + memcpy(out, &sctx->sst, sizeof(struct sha256_state)); + return 0; +} + +static int sha256_ce_import(struct shash_desc *desc, const void *in) +{ + struct sha256_ce_state *sctx = shash_desc_ctx(desc); + + memcpy(&sctx->sst, in, sizeof(struct sha256_state)); + sctx->finalize = 0; + return 0; +} + static struct shash_alg algs[] = { { .init = sha224_base_init, .update = sha256_ce_update, .final = sha256_ce_final, .finup = sha256_ce_finup, + .export = sha256_ce_export, + .import = sha256_ce_import, .descsize = sizeof(struct sha256_ce_state), + .statesize = sizeof(struct sha256_state), .digestsize = SHA224_DIGEST_SIZE, .base = { .cra_name = "sha224", @@ -128,7 +148,10 @@ static struct shash_alg algs[] = { { .update = sha256_ce_update, .final = sha256_ce_final, .finup = sha256_ce_finup, + .export = sha256_ce_export, + .import = sha256_ce_import, .descsize = sizeof(struct sha256_ce_state), + .statesize = sizeof(struct sha256_state), .digestsize = SHA256_DIGEST_SIZE, .base = { .cra_name = "sha256", |