| Message ID | 1582128037-18644-1-git-send-email-clabbe@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | crypto: arm64: CE: implement export/import | expand |
On Wed, Feb 19, 2020 at 04:00:37PM +0000, Corentin Labbe wrote: > 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 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. > > Signed-off-by: Corentin Labbe <clabbe@baylibre.com> > --- > arch/arm64/crypto/sha1-ce-glue.c | 20 ++++++++++++++++++++ > arch/arm64/crypto/sha2-ce-glue.c | 23 +++++++++++++++++++++++ > 2 files changed, 43 insertions(+) > > diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c > index 63c875d3314b..dc44d48415cd 100644 > --- a/arch/arm64/crypto/sha1-ce-glue.c > +++ b/arch/arm64/crypto/sha1-ce-glue.c > @@ -91,12 +91,32 @@ static int sha1_ce_final(struct shash_desc *desc, u8 *out) > return sha1_base_finish(desc, out); > } > > +static int sha1_ce_export(struct shash_desc *desc, void *out) > +{ > + struct sha1_ce_state *sctx = shash_desc_ctx(desc); > + > + memcpy(out, sctx, sizeof(struct sha1_state)); > + return 0; > +} > + > +static int sha1_ce_import(struct shash_desc *desc, const void *in) > +{ > + struct sha1_ce_state *sctx = shash_desc_ctx(desc); > + > + memcpy(sctx, in, sizeof(struct sha1_state)); > + sctx->finalize = 0; > + return 0; > +} Can you use '&sctx->sst' instead of 'sctx' so that we aren't relying on the 'struct sha1_state' being located at the beginning of the struct? Likewise for SHA-2. - Eric
On Wed, Feb 19, 2020 at 10:16:54AM -0800, Eric Biggers wrote: > On Wed, Feb 19, 2020 at 04:00:37PM +0000, Corentin Labbe wrote: > > 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 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. > > > > Signed-off-by: Corentin Labbe <clabbe@baylibre.com> > > --- > > arch/arm64/crypto/sha1-ce-glue.c | 20 ++++++++++++++++++++ > > arch/arm64/crypto/sha2-ce-glue.c | 23 +++++++++++++++++++++++ > > 2 files changed, 43 insertions(+) > > > > diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c > > index 63c875d3314b..dc44d48415cd 100644 > > --- a/arch/arm64/crypto/sha1-ce-glue.c > > +++ b/arch/arm64/crypto/sha1-ce-glue.c > > @@ -91,12 +91,32 @@ static int sha1_ce_final(struct shash_desc *desc, u8 *out) > > return sha1_base_finish(desc, out); > > } > > > > +static int sha1_ce_export(struct shash_desc *desc, void *out) > > +{ > > + struct sha1_ce_state *sctx = shash_desc_ctx(desc); > > + > > + memcpy(out, sctx, sizeof(struct sha1_state)); > > + return 0; > > +} > > + > > +static int sha1_ce_import(struct shash_desc *desc, const void *in) > > +{ > > + struct sha1_ce_state *sctx = shash_desc_ctx(desc); > > + > > + memcpy(sctx, in, sizeof(struct sha1_state)); > > + sctx->finalize = 0; > > + return 0; > > +} > > Can you use '&sctx->sst' instead of 'sctx' so that we aren't relying on the > 'struct sha1_state' being located at the beginning of the struct? > > Likewise for SHA-2. Yes, I will do that, it is better. thanks Regards
diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c index 63c875d3314b..dc44d48415cd 100644 --- a/arch/arm64/crypto/sha1-ce-glue.c +++ b/arch/arm64/crypto/sha1-ce-glue.c @@ -91,12 +91,32 @@ static int sha1_ce_final(struct shash_desc *desc, u8 *out) return sha1_base_finish(desc, out); } +static int sha1_ce_export(struct shash_desc *desc, void *out) +{ + struct sha1_ce_state *sctx = shash_desc_ctx(desc); + + memcpy(out, sctx, sizeof(struct sha1_state)); + return 0; +} + +static int sha1_ce_import(struct shash_desc *desc, const void *in) +{ + struct sha1_ce_state *sctx = shash_desc_ctx(desc); + + memcpy(sctx, in, sizeof(struct sha1_state)); + sctx->finalize = 0; + return 0; +} + static struct shash_alg alg = { .init = sha1_base_init, .update = sha1_ce_update, .final = sha1_ce_final, .finup = sha1_ce_finup, + .import = sha1_ce_import, + .export = sha1_ce_export, .descsize = sizeof(struct sha1_ce_state), + .statesize = sizeof(struct sha1_state), .digestsize = SHA1_DIGEST_SIZE, .base = { .cra_name = "sha1", diff --git a/arch/arm64/crypto/sha2-ce-glue.c b/arch/arm64/crypto/sha2-ce-glue.c index a8e67bafba3d..f986d4a323b3 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, 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, 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",
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 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. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> --- arch/arm64/crypto/sha1-ce-glue.c | 20 ++++++++++++++++++++ arch/arm64/crypto/sha2-ce-glue.c | 23 +++++++++++++++++++++++ 2 files changed, 43 insertions(+)