- 10 Jan, 2008 40 commits
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Herbert Xu authored
This patch adds an async field to /proc/crypto for ablkcipher and aead algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch makes chainiv avoid spinning by postponing requests on lock contention if the user allows the use of asynchronous algorithms. If a synchronous algorithm is requested then we behave as before. This should improve IPsec performance on SMP when two CPUs attempt to transmit over the same SA. Currently one of them will spin doing nothing waiting for the other CPU to finish its encryption. This patch makes it postpone the request and get on with other work. If only one CPU is transmitting for a given SA, then we will process the request synchronously as before. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
Now that seqiv supports AEAD algorithms it needs to select the AEAD option. Thanks to Erez Zadok for pointing out the problem. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
It's better to return silently than crash and burn when someone feeds us a zero length. In particular the null digest algorithm when used as part of authenc will do that to us. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
We need to allow setkey on digest_null if it is to be used directly by authenc instead of through hmac. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds a null blkcipher algorithm called ecb(cipher_null) for backwards compatibility. Previously the null algorithm when used by IPsec copied the data byte by byte. This new algorithm optimises that to a straight memcpy which lets us better measure inherent overheads in our IPsec code. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Joy Latten authored
This patch adds 7 test vectors to tcrypt for CCM. The test vectors are from rfc 3610. There are about 10 more test vectors in RFC 3610 and 4 or 5 more in NIST. I can add these as time permits. I also needed to set authsize. CCM has a prerequisite of authsize. Signed-off-by: Joy Latten <latten@austin.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Joy Latten authored
This patch adds Counter with CBC-MAC (CCM) support. RFC 3610 and NIST Special Publication 800-38C were referenced. Signed-off-by: Joy Latten <latten@austin.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch makes crypto_alloc_aead always return algorithms that is capable of generating their own IVs through givencrypt and givdecrypt. All existing AEAD algorithms already do. New ones must either supply their own or specify a generic IV generator with the geniv field. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds support for using seqiv with AEAD algorithms. This is useful for those AEAD algorithms that performs authentication before encryption because the IV generated by the underlying encryption algorithm won't be available for authentication. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch creates the infrastructure to help the construction of IV generator templates that wrap around AEAD algorithms by adding an IV generator to them. This is useful for AEAD algorithms with no built-in IV generator or to replace their built-in generator. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
Some algorithms always require manual IV construction. For instance, the generic CCM algorithm requires the first byte of the IV to be manually constructed. Such algorithms are always used by other algorithms equipped with their own IV generators and do not need IV generation per se. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch finally makes the givencrypt/givdecrypt operations available to users by adding crypto_aead_givencrypt and crypto_aead_givdecrypt. A suite of helpers to allocate and fill in the request is also available. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch implements the givencrypt function for authenc. It simply calls the givencrypt operation on the underlying cipher instead of encrypt. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds the underlying givcrypt operations for aead and associated support elements. The rationale is identical to that of the skcipher givcrypt operations, i.e., sometimes only the algorithm knows how the IV should be generated. A new request type aead_givcrypt_request is added which contains an embedded aead_request structure with two new elements to support this operation. The new elements are seq and giv. The seq field should contain a strictly increasing 64-bit integer which may be used by certain IV generators as an input value. The giv field will be used to store the generated IV. It does not need to obey the alignment requirements of the algorithm because it's not used during the operation. The existing iv field must still be available as it will be used to store intermediate IVs and the output IV if chaining is desired. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch finally makes the givencrypt/givdecrypt operations available to users by adding crypto_skcipher_givencrypt and crypto_skcipher_givdecrypt. A suite of helpers to allocate and fill in the request is also available. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This generator generates an IV based on a sequence number by xoring it with a salt. This algorithm is mainly useful for CTR and similar modes. This patch also sets it as the default IV generator for ctr. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
Now that gcm and authenc have been converted to crypto_spawn_skcipher, this patch removes the obsolete crypto_spawn_ablkcipher function. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch converts the gcm algorithm over to crypto_grab_skcipher which is a prerequisite for IV generation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds the gcm_base template which takes a block cipher parameter instead of cipher. This allows the user to specify a specific CTR implementation. This also fixes a leak of the cipher algorithm that was previously looked up but never freed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch converts the authenc algorithm over to crypto_grab_skcipher which is a prerequisite for IV generation. This patch also changes authenc to set its ASYNC status depending on the ASYNC status of the underlying skcipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch makes crypto_alloc_ablkcipher/crypto_grab_skcipher always return algorithms that are capable of generating their own IVs through givencrypt and givdecrypt. Each algorithm may specify its default IV generator through the geniv field. For algorithms that do not set the geniv field, the blkcipher layer will pick a default. Currently it's chainiv for synchronous algorithms and eseqiv for asynchronous algorithms. Note that if these wrappers do not work on an algorithm then that algorithm must specify its own geniv or it can't be used at all. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This generator generates an IV based on a sequence number by xoring it with a salt and then encrypting it with the same key as used to encrypt the plain text. This algorithm requires that the block size be equal to the IV size. It is mainly useful for CBC. It has one noteworthy property that for IPsec the IV happens to lie just before the plain text so the IV generation simply increases the number of encrypted blocks by one. Therefore the cost of this generator is entirely dependent on the speed of the underlying cipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds the helper skcipher_givcrypt_complete which should be called when an ablkcipher algorithm has completed a givcrypt request. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
The chain IV generator is the one we've been using in the IPsec stack. It simply starts out with a random IV, then uses the last block of each encrypted packet's cipher text as the IV for the next packet. It can only be used by synchronous ciphers since we have to make sure that we don't start the encryption of the next packet until the last one has completed. It does have the advantage of using very little CPU time since it doesn't have to generate anything at all. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch creates the infrastructure to help the construction of givcipher templates that wrap around existing blkcipher/ablkcipher algorithms by adding an IV generator to them. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
If the underlying algorithm specifies a specific geniv algorithm then we should use it for the cryptd version as well. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch introduces the geniv field which indicates the default IV generator for each algorithm. It should point to a string that is not freed as long as the algorithm is registered. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
Different block cipher modes have different requirements for intialisation vectors. For example, CBC can use a simple randomly generated IV while modes such as CTR must use an IV generation mechanisms that give a stronger guarantee on the lack of collisions. Furthermore, disk encryption modes have their own IV generation algorithms. Up until now IV generation has been left to the users of the symmetric key cipher API. This is inconvenient as the number of block cipher modes increase because the user needs to be aware of which mode is supposed to be paired with which IV generation algorithm. Therefore it makes sense to integrate the IV generation into the crypto API. This patch takes the first step in that direction by creating two new ablkcipher operations, givencrypt and givdecrypt that generates an IV before performing the actual encryption or decryption. The operations are currently not exposed to the user. That will be done once the underlying functionality has actually been implemented. It also creates the underlying givcipher type. Algorithms that directly generate IVs would use it instead of ablkcipher. All other algorithms (including all existing ones) would generate a givcipher algorithm upon registration. This givcipher algorithm will be constructed from the geniv string that's stored in every algorithm. That string will locate a template which is instantiated by the blkcipher/ablkcipher algorithm in question to give a givcipher algorithm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
Note: From now on the collective of ablkcipher/blkcipher/givcipher will be known as skcipher, i.e., symmetric key cipher. The name blkcipher has always been much of a misnomer since it supports stream ciphers too. This patch adds the function crypto_grab_skcipher as a new way of getting an ablkcipher spawn. The problem is that previously we did this in two steps, first getting the algorithm and then calling crypto_init_spawn. This meant that each spawn user had to be aware of what type and mask to use for these two steps. This is difficult and also presents a problem when the type/mask changes as they're about to be for IV generators. The new interface does both steps together just like crypto_alloc_ablkcipher. As a side-effect this also allows us to be stronger on type enforcement for spawns. For now this is only done for ablkcipher but it's trivial to extend for other types. This patch also moves the type/mask logic for skcipher into the helpers crypto_skcipher_type and crypto_skcipher_mask. Finally this patch introduces the function crypto_require_sync to determine whether the user is specifically requesting a sync algorithm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds the necessary changes for GCM to be used with async ciphers. This would allow it to be used with hardware devices that support CTR. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
As discussed previously, this patch moves the basic CTR functionality into a chainable algorithm called ctr. The IPsec-specific variant of it is now placed on top with the name rfc3686. So ctr(aes) gives a chainable cipher with IV size 16 while the IPsec variant will be called rfc3686(ctr(aes)). This patch also adjusts gcm accordingly. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
With the impending addition of the givcipher type, both blkcipher and ablkcipher algorithms will use it to create givcipher objects. As such it no longer makes sense to split the system between ablkcipher and blkcipher. In particular, both ablkcipher.c and blkcipher.c would need to use the givcipher type which has to reside in ablkcipher.c since it shares much code with it. This patch merges the two Kconfig options as well as the modules into one. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch fixes the request context alignment so that it is actually aligned to the value required by the algorithm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch adds a new helper crypto_attr_alg_name which is basically the first half of crypto_attr_alg. That is, it returns an algorithm name parameter as a string without looking it up. The caller can then look it up immediately or defer it until later. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
When allocating ablkcipher/hash objects, we use a mask that's wider than the usual type mask. This patch sanitises the mask supplied by the user so we don't end up using a narrower mask which may lead to unintended results. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Borislav Petkov authored
i get here: ---- LD vmlinux SYSMAP System.map SYSMAP .tmp_System.map Building modules, stage 2. MODPOST 226 modules ERROR: "crypto_hash_type" [crypto/authenc.ko] undefined! make[1]: *** [__modpost] Error 1 make: *** [modules] Error 2 --- which fails because crypto_hash_type is declared in crypto/hash.c. You might wanna fix it like so: Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Adrian Bunk authored
This patch adds __dev{init,exit} annotations. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch merges the common hashing code between encryption and decryption. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Herbert Xu authored
This patch changes setkey to use RTA_OK to check the validity of the setkey request. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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