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* crypto: api - Use data directly in completion functionHerbert Xu2023-02-131-9/+6
| | | | | | | This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Use akcipher_request_completeHerbert Xu2023-02-131-19/+15
| | | | | | | | | Use the akcipher_request_complete helper instead of calling the completion function directly. In fact the previous code was buggy in that EINPROGRESS was never passed back to the original caller. Fixes: 3d5b1ecdea6f ("crypto: rsa - RSA padding algorithm") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Revert "crypto: rsa-pkcs1pad - Replace GFP_ATOMIC with GFP_KERNEL in ↵Herbert Xu2023-02-031-1/+1
| | | | | | | | | | | | | pkcs1pad_encrypt_sign_complete" This reverts commit 1ca2809897155f1adc43e4859b4a3582e235c09a. While the akcipher API as a whole is designed to be called only from thread context, its completion path is still called from softirq context as usual. Therefore we must not use GFP_KERNEL on that path. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Merge tag 'v6.2-p1' of ↵Linus Torvalds2022-12-141-1/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Optimise away self-test overhead when they are disabled - Support symmetric encryption via keyring keys in af_alg - Flip hwrng default_quality, the default is now maximum entropy Algorithms: - Add library version of aesgcm - CFI fixes for assembly code - Add arm/arm64 accelerated versions of sm3/sm4 Drivers: - Remove assumption on arm64 that kmalloc is DMA-aligned - Fix selftest failures in rockchip - Add support for RK3328/RK3399 in rockchip - Add deflate support in qat - Merge ux500 into stm32 - Add support for TEE for PCI ID 0x14CA in ccp - Add mt7986 support in mtk - Add MaxLinear platform support in inside-secure - Add NPCM8XX support in npcm" * tag 'v6.2-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (184 commits) crypto: ux500/cryp - delete driver crypto: stm32/cryp - enable for use with Ux500 crypto: stm32 - enable drivers to be used on Ux500 dt-bindings: crypto: Let STM32 define Ux500 CRYP hwrng: geode - Fix PCI device refcount leak hwrng: amd - Fix PCI device refcount leak crypto: qce - Set DMA alignment explicitly crypto: octeontx2 - Set DMA alignment explicitly crypto: octeontx - Set DMA alignment explicitly crypto: keembay - Set DMA alignment explicitly crypto: safexcel - Set DMA alignment explicitly crypto: hisilicon/hpre - Set DMA alignment explicitly crypto: chelsio - Set DMA alignment explicitly crypto: ccree - Set DMA alignment explicitly crypto: ccp - Set DMA alignment explicitly crypto: cavium - Set DMA alignment explicitly crypto: img-hash - Fix variable dereferenced before check 'hdev->req' crypto: arm64/ghash-ce - use frame_push/pop macros consistently crypto: arm64/crct10dif - use frame_push/pop macros consistently crypto: arm64/aes-modes - use frame_push/pop macros consistently ...
| * crypto: rsa-pkcs1pad - Use helper to set reqsizeHerbert Xu2022-12-021-1/+4
| | | | | | | | | | | | The value of reqsize must only be changed through the helper. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | treewide: use get_random_u32_inclusive() when possibleJason A. Donenfeld2022-11-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These cases were done with this Coccinelle: @@ expression H; expression L; @@ - (get_random_u32_below(H) + L) + get_random_u32_inclusive(L, H + L - 1) @@ expression H; expression L; expression E; @@ get_random_u32_inclusive(L, H - + E - - E ) @@ expression H; expression L; expression E; @@ get_random_u32_inclusive(L, H - - E - + E ) @@ expression H; expression L; expression E; expression F; @@ get_random_u32_inclusive(L, H - - E + F - + E ) @@ expression H; expression L; expression E; expression F; @@ get_random_u32_inclusive(L, H - + E + F - - E ) And then subsequently cleaned up by hand, with several automatic cases rejected if it didn't make sense contextually. Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* | treewide: use get_random_u32_below() instead of deprecated functionJason A. Donenfeld2022-11-181-1/+1
|/ | | | | | | | | | | | | | | | | | | | This is a simple mechanical transformation done by: @@ expression E; @@ - prandom_u32_max + get_random_u32_below (E) Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs Reviewed-by: SeongJae Park <sj@kernel.org> # for damon Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> # for arm Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* crypto: rsa-pkcs1pad - use clearer variable namesEric Biggers2022-01-311-15/+16
| | | | | | | | | | | | The new convention for akcipher_alg::verify makes it unclear which values are the lengths of the signature and digest. Add local variables to make it clearer what is going on. Also rename the digest_size variable in pkcs1pad_sign(), as it is actually the digest *info* size, not the digest size which is different. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - fix buffer overread in pkcs1pad_verify_complete()Eric Biggers2022-01-311-0/+2
| | | | | | | | | | | Before checking whether the expected digest_info is present, we need to check that there are enough bytes remaining. Fixes: a49de377e051 ("crypto: Add hash param to pkcs1pad") Cc: <stable@vger.kernel.org> # v4.6+ Cc: Tadeusz Struk <tadeusz.struk@linaro.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - restore signature length checkEric Biggers2022-01-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | RSA PKCS#1 v1.5 signatures are required to be the same length as the RSA key size. RFC8017 specifically requires the verifier to check this (https://datatracker.ietf.org/doc/html/rfc8017#section-8.2.2). Commit a49de377e051 ("crypto: Add hash param to pkcs1pad") changed the kernel to allow longer signatures, but didn't explain this part of the change; it seems to be unrelated to the rest of the commit. Revert this change, since it doesn't appear to be correct. We can be pretty sure that no one is relying on overly-long signatures (which would have to be front-padded with zeroes) being supported, given that they would have been broken since commit c7381b012872 ("crypto: akcipher - new verify API for public key algorithms"). Fixes: a49de377e051 ("crypto: Add hash param to pkcs1pad") Cc: <stable@vger.kernel.org> # v4.6+ Cc: Tadeusz Struk <tadeusz.struk@linaro.org> Suggested-by: Vitaly Chikunov <vt@altlinux.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - correctly get hash from source scatterlistEric Biggers2022-01-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit c7381b012872 ("crypto: akcipher - new verify API for public key algorithms") changed akcipher_alg::verify to take in both the signature and the actual hash and do the signature verification, rather than just return the hash expected by the signature as was the case before. To do this, it implemented a hack where the signature and hash are concatenated with each other in one scatterlist. Obviously, for this to work correctly, akcipher_alg::verify needs to correctly extract the two items from the scatterlist it is given. Unfortunately, it doesn't correctly extract the hash in the case where the signature is longer than the RSA key size, as it assumes that the signature's length is equal to the RSA key size. This causes a prefix of the hash, or even the entire hash, to be taken from the *signature*. (Note, the case of a signature longer than the RSA key size should not be allowed in the first place; a separate patch will fix that.) It is unclear whether the resulting scheme has any useful security properties. Fix this by correctly extracting the hash from the scatterlist. Fixes: c7381b012872 ("crypto: akcipher - new verify API for public key algorithms") Cc: <stable@vger.kernel.org> # v5.2+ Reviewed-by: Vitaly Chikunov <vt@altlinux.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - only allow with rsaEric Biggers2022-01-311-0/+5
| | | | | | | | | | | The pkcs1pad template can be instantiated with an arbitrary akcipher algorithm, which doesn't make sense; it is specifically an RSA padding scheme. Make it check that the underlying algorithm really is RSA. Fixes: 3d5b1ecdea6f ("crypto: rsa - RSA padding algorithm") Cc: <stable@vger.kernel.org> # v4.5+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: algapi - Remove skbuff.h inclusionHerbert Xu2020-08-201-0/+1
| | | | | | | | | | | | The header file algapi.h includes skbuff.h unnecessarily since all we need is a forward declaration for struct sk_buff. This patch removes that inclusion. Unfortunately skbuff.h pulls in a lot of things and drivers over the years have come to rely on it so this patch adds a lot of missing inclusions that result from this. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* mm, treewide: rename kzfree() to kfree_sensitive()Waiman Long2020-08-071-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As said by Linus: A symmetric naming is only helpful if it implies symmetries in use. Otherwise it's actively misleading. In "kzalloc()", the z is meaningful and an important part of what the caller wants. In "kzfree()", the z is actively detrimental, because maybe in the future we really _might_ want to use that "memfill(0xdeadbeef)" or something. The "zero" part of the interface isn't even _relevant_. The main reason that kzfree() exists is to clear sensitive information that should not be leaked to other future users of the same memory objects. Rename kzfree() to kfree_sensitive() to follow the example of the recently added kvfree_sensitive() and make the intention of the API more explicit. In addition, memzero_explicit() is used to clear the memory to make sure that it won't get optimized away by the compiler. The renaming is done by using the command sequence: git grep -w --name-only kzfree |\ xargs sed -i 's/kzfree/kfree_sensitive/' followed by some editing of the kfree_sensitive() kerneldoc and adding a kzfree backward compatibility macro in slab.h. [akpm@linux-foundation.org: fs/crypto/inline_crypt.c needs linux/slab.h] [akpm@linux-foundation.org: fix fs/crypto/inline_crypt.c some more] Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Cc: James Morris <jmorris@namei.org> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Joe Perches <joe@perches.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: David Rientjes <rientjes@google.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: "Jason A . Donenfeld" <Jason@zx2c4.com> Link: http://lkml.kernel.org/r/20200616154311.12314-3-longman@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* crypto: algapi - use common mechanism for inheriting flagsEric Biggers2020-07-161-10/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flag CRYPTO_ALG_ASYNC is "inherited" in the sense that when a template is instantiated, the template will have CRYPTO_ALG_ASYNC set if any of the algorithms it uses has CRYPTO_ALG_ASYNC set. We'd like to add a second flag (CRYPTO_ALG_ALLOCATES_MEMORY) that gets "inherited" in the same way. This is difficult because the handling of CRYPTO_ALG_ASYNC is hardcoded everywhere. Address this by: - Add CRYPTO_ALG_INHERITED_FLAGS, which contains the set of flags that have these inheritance semantics. - Add crypto_algt_inherited_mask(), for use by template ->create() methods. It returns any of these flags that the user asked to be unset and thus must be passed in the 'mask' to crypto_grab_*(). - Also modify crypto_check_attr_type() to handle computing the 'mask' so that most templates can just use this. - Make crypto_grab_*() propagate these flags to the template instance being created so that templates don't have to do this themselves. Make crypto/simd.c propagate these flags too, since it "wraps" another algorithm, similar to a template. Based on a patch by Mikulas Patocka <mpatocka@redhat.com> (https://lore.kernel.org/r/alpine.LRH.2.02.2006301414580.30526@file01.intranet.prod.int.rdu2.redhat.com). Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - simplify error handling in pkcs1pad_create()Eric Biggers2020-03-061-39/+20
| | | | | | | | | | | | | | Simplify the error handling in pkcs1pad_create() by taking advantage of crypto_grab_akcipher() now handling an ERR_PTR() name and by taking advantage of crypto_drop_akcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. While we're at it, also simplify the way the hash_name optional argument is handled. We only need to check whether it's present in one place, and we can just assign directly to ctx->digest_info. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: akcipher - pass instance to crypto_grab_akcipher()Eric Biggers2020-01-091-3/+5
| | | | | | | | | | | | | | | | | | | Initializing a crypto_akcipher_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_akcipher(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_akcipher() take the instance as an argument. To keep the function call from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into pkcs1pad_create(). Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner2019-05-301-5/+1
| | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* crypto: akcipher - new verify API for public key algorithmsVitaly Chikunov2019-04-181-10/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previous akcipher .verify() just `decrypts' (using RSA encrypt which is using public key) signature to uncover message hash, which was then compared in upper level public_key_verify_signature() with the expected hash value, which itself was never passed into verify(). This approach was incompatible with EC-DSA family of algorithms, because, to verify a signature EC-DSA algorithm also needs a hash value as input; then it's used (together with a signature divided into halves `r||s') to produce a witness value, which is then compared with `r' to determine if the signature is correct. Thus, for EC-DSA, nor requirements of .verify() itself, nor its output expectations in public_key_verify_signature() wasn't sufficient. Make improved .verify() call which gets hash value as input and produce complete signature check without any output besides status. Now for the top level verification only crypto_akcipher_verify() needs to be called and its return value inspected. Make sure that `digest' is in kmalloc'd memory (in place of `output`) in {public,tpm}_key_verify_signature() as insisted by Herbert Xu, and will be changed in the following commit. Cc: David Howells <dhowells@redhat.com> Cc: keyrings@vger.kernel.org Signed-off-by: Vitaly Chikunov <vt@altlinux.org> Reviewed-by: Denis Kenzior <denkenz@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa - unimplement sign/verify for raw RSA backendsVitaly Chikunov2019-04-181-2/+2
| | | | | | | | | | | | | | | | | | | | In preparation for new akcipher verify call remove sign/verify callbacks from RSA backends and make PKCS1 driver call encrypt/decrypt instead. This also complies with the well-known idea that raw RSA should never be used for sign/verify. It only should be used with proper padding scheme such as PKCS1 driver provides. Cc: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Cc: qat-linux@intel.com Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Gary Hook <gary.hook@amd.com> Cc: Horia Geantă <horia.geanta@nxp.com> Cc: Aymen Sghaier <aymen.sghaier@nxp.com> Signed-off-by: Vitaly Chikunov <vt@altlinux.org> Reviewed-by: Horia Geantă <horia.geanta@nxp.com> Acked-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - include <crypto/internal/rsa.h>Eric Biggers2019-01-181-0/+1
| | | | | | | | | | | Include internal/rsa.h in rsa-pkcs1pad.c to get the declaration of rsa_pkcs1pad_tmpl. This fixes the following sparse warning: crypto/rsa-pkcs1pad.c:698:24: warning: symbol 'rsa_pkcs1pad_tmpl' was not declared. Should it be static? Cc: Andrzej Zaborowski <andrew.zaborowski@intel.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad: Allow hash to be optional [ver #2]Denis Kenzior2018-10-261-18/+41
| | | | | | | | | | | | | | | The original pkcs1pad implementation allowed to pad/unpad raw RSA output. However, this has been taken out in commit: commit c0d20d22e0ad ("crypto: rsa-pkcs1pad - Require hash to be present") This patch restored this ability as it is needed by the asymmetric key implementation. Signed-off-by: Denis Kenzior <denkenz@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Marcel Holtmann <marcel@holtmann.org> Reviewed-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: James Morris <james.morris@microsoft.com>
* crypto: fix a memory leak in rsa-kcs1pad's encryption modeDan Aloni2018-09-281-9/+0
| | | | | | | | | | | | The encryption mode of pkcs1pad never uses out_sg and out_buf, so there's no need to allocate the buffer, which presently is not even being freed. CC: Herbert Xu <herbert@gondor.apana.org.au> CC: linux-crypto@vger.kernel.org CC: "David S. Miller" <davem@davemloft.net> Signed-off-by: Dan Aloni <dan@kernelim.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Replace GFP_ATOMIC with GFP_KERNEL in ↵Jia-Ju Bai2018-02-151-1/+1
| | | | | | | | | | | | | pkcs1pad_encrypt_sign_complete After checking all possible call chains to kzalloc here, my tool finds that this kzalloc is never called in atomic context. Thus GFP_ATOMIC is not necessary, and it can be replaced with GFP_KERNEL. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: remove redundant backlog checks on EBUSYGilad Ben-Yossef2017-11-031-12/+4
| | | | | | | | | Now that -EBUSY return code only indicates backlog queueing we can safely remove the now redundant check for the CRYPTO_TFM_REQ_MAY_BACKLOG flag when -EBUSY is returned. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - use constant time memory comparison for MACsJason A. Donenfeld2017-06-201-1/+1
| | | | | | | | | | | Otherwise, we enable all sorts of forgeries via timing attack. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Suggested-by: Stephan Müller <smueller@chronox.de> Cc: stable@vger.kernel.org Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: linux-crypto@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pkcs1pad - comply with crypto_akcipher_maxsize()Tudor-Dan Ambarus2017-06-101-8/+2
| | | | | | | | | | | | crypto_akcipher_maxsize() asks for the output buffer size without caring for errors. It allways assume that will be called after a valid setkey. Comply with it and return what he wants. crypto_akcipher_maxsize() now returns an unsigned int. Remove the unnecessary check. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Handle leading zero for decryptionHerbert Xu2016-09-221-17/+24
| | | | | | | | | | | | | As the software RSA implementation now produces fixed-length output, we need to eliminate leading zeros in the calling code instead. This patch does just that for pkcs1pad decryption while signature verification was fixed in an earlier patch. Fixes: 9b45b7bba3d2 ("crypto: rsa - Generate fixed-length output") Reported-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - fix rsa-pkcs1pad request structTadeusz Struk2016-07-191-2/+1
| | | | | | | | To allow for child request context the struct akcipher_request child_req needs to be at the end of the structure. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Fix regression from leading zerosHerbert Xu2016-07-031-16/+22
| | | | | | | | | | | | As the software RSA implementation now produces fixed-length output, we need to eliminate leading zeros in the calling code instead. This patch does just that for pkcs1pad signature verification. Fixes: 9b45b7bba3d2 ("crypto: rsa - Generate fixed-length output") Reported-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Avoid copying output when possibleHerbert Xu2016-07-011-67/+45
| | | | | | | | | | | | | | In the vast majority of cases (2^-32 on 32-bit and 2^-64 on 64-bit) cases, the result from encryption/signing will require no padding. This patch makes these two operations write their output directly to the final destination. Only in the exceedingly rare cases where fixup is needed to we copy it out and back to add the leading zeroes. This patch also makes use of the crypto_akcipher_set_crypt API instead of writing the akcipher request directly. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Move key size check to setkeyHerbert Xu2016-07-011-30/+26
| | | | | | | Rather than repeatedly checking the key size on each operation, we should be checking it once when the key is set. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Always use GFP_KERNELHerbert Xu2016-07-011-16/+6
| | | | | | | We don't currently support using akcipher in atomic contexts, so GFP_KERNEL should always be used. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Remove bogus page splittingHerbert Xu2016-07-011-14/+5
| | | | | | | | The helper pkcs1pad_sg_set_buf tries to split a buffer that crosses a page boundary into two SG entries. This is unnecessary. This patch removes that. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - Require hash to be presentHerbert Xu2016-07-011-53/+30
| | | | | | | | | | | The only user of rsa-pkcs1pad always uses the hash so there is no reason to support the case of not having a hash. This patch also changes the digest info lookup so that it is only done once during template instantiation rather than on each operation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - fix dst lenTadeusz Struk2016-04-151-6/+6
| | | | | | | | | The output buffer length has to be at least as big as the key_size. It is then updated to the actual output size by the implementation. Cc: <stable@vger.kernel.org> Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: Add hash param to pkcs1padTadeusz Struk2016-03-031-26/+156
| | | | | | | | | | | This adds hash param to pkcs1pad. The pkcs1pad template can work with or without the hash. When hash param is provided then the verify operation will also verify the output against the known digest. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa-pkcs1pad - don't allocate buffer on stackAndrzej Zaborowski2015-12-221-8/+19
| | | | | | | | | Avoid the s390 compile "warning: 'pkcs1pad_encrypt_sign_complete' uses dynamic stack allocation" reported by kbuild test robot. Don't use a flat zero-filled buffer, instead zero the contents of the SGL. Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rsa - RSA padding algorithmAndrzej Zaborowski2015-12-091-0/+617
This patch adds PKCS#1 v1.5 standard RSA padding as a separate template. This way an RSA cipher with padding can be obtained by instantiating "pkcs1pad(rsa)". The reason for adding this is that RSA is almost never used without this padding (or OAEP) so it will be needed for either certificate work in the kernel or the userspace, and I also hear that it is likely implemented by hardware RSA in which case hardware implementations of the whole of pkcs1pad(rsa) can be provided. Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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