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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-10 14:04:16 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-10 14:04:16 -0700 |
commit | aa645be5617b94b86741688a70711030e7f29e98 (patch) | |
tree | 3070dacd9d93e619e7f7daeded0b68f9bb2ed9dc /crypto/algif_hash.c | |
parent | bd3c3c2012862d66db97ded288a10afe5ee79190 (diff) | |
parent | 8322c8407e49034b534abd03d7daa9e267139b4e (diff) | |
download | linux-crypto-aa645be5617b94b86741688a70711030e7f29e98.tar.gz linux-crypto-aa645be5617b94b86741688a70711030e7f29e98.zip |
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"Here is the crypto update for 4.9:
API:
- The crypto engine code now supports hashes.
Algorithms:
- Allow keys >= 2048 bits in FIPS mode for RSA.
Drivers:
- Memory overwrite fix for vmx ghash.
- Add support for building ARM sha1-neon in Thumb2 mode.
- Reenable ARM ghash-ce code by adding import/export.
- Reenable img-hash by adding import/export.
- Add support for multiple cores in omap-aes.
- Add little-endian support for sha1-powerpc.
- Add Cavium HWRNG driver for ThunderX SoC"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (137 commits)
crypto: caam - treat SGT address pointer as u64
crypto: ccp - Make syslog errors human-readable
crypto: ccp - clean up data structure
crypto: vmx - Ensure ghash-generic is enabled
crypto: testmgr - add guard to dst buffer for ahash_export
crypto: caam - Unmap region obtained by of_iomap
crypto: sha1-powerpc - little-endian support
crypto: gcm - Fix IV buffer size in crypto_gcm_setkey
crypto: vmx - Fix memory corruption caused by p8_ghash
crypto: ghash-generic - move common definitions to a new header file
crypto: caam - fix sg dump
hwrng: omap - Only fail if pm_runtime_get_sync returns < 0
crypto: omap-sham - shrink the internal buffer size
crypto: omap-sham - add support for export/import
crypto: omap-sham - convert driver logic to use sgs for data xmit
crypto: omap-sham - change the DMA threshold value to a define
crypto: omap-sham - add support functions for sg based data handling
crypto: omap-sham - rename sgl to sgl_tmp for deprecation
crypto: omap-sham - align algorithms on word offset
crypto: omap-sham - add context export/import stubs
...
Diffstat (limited to '')
-rw-r--r-- | crypto/algif_hash.c | 73 |
1 files changed, 61 insertions, 12 deletions
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index 68a5ceaa..2d8466f9 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -39,6 +39,37 @@ struct algif_hash_tfm { bool has_key; }; +static int hash_alloc_result(struct sock *sk, struct hash_ctx *ctx) +{ + unsigned ds; + + if (ctx->result) + return 0; + + ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); + + ctx->result = sock_kmalloc(sk, ds, GFP_KERNEL); + if (!ctx->result) + return -ENOMEM; + + memset(ctx->result, 0, ds); + + return 0; +} + +static void hash_free_result(struct sock *sk, struct hash_ctx *ctx) +{ + unsigned ds; + + if (!ctx->result) + return; + + ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); + + sock_kzfree_s(sk, ctx->result, ds); + ctx->result = NULL; +} + static int hash_sendmsg(struct socket *sock, struct msghdr *msg, size_t ignored) { @@ -54,6 +85,9 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg, lock_sock(sk); if (!ctx->more) { + if ((msg->msg_flags & MSG_MORE)) + hash_free_result(sk, ctx); + err = af_alg_wait_for_completion(crypto_ahash_init(&ctx->req), &ctx->completion); if (err) @@ -90,6 +124,10 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg, ctx->more = msg->msg_flags & MSG_MORE; if (!ctx->more) { + err = hash_alloc_result(sk, ctx); + if (err) + goto unlock; + ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); err = af_alg_wait_for_completion(crypto_ahash_final(&ctx->req), &ctx->completion); @@ -116,6 +154,13 @@ static ssize_t hash_sendpage(struct socket *sock, struct page *page, sg_init_table(ctx->sgl.sg, 1); sg_set_page(ctx->sgl.sg, page, size, offset); + if (!(flags & MSG_MORE)) { + err = hash_alloc_result(sk, ctx); + if (err) + goto unlock; + } else if (!ctx->more) + hash_free_result(sk, ctx); + ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, ctx->result, size); if (!(flags & MSG_MORE)) { @@ -153,6 +198,7 @@ static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; unsigned ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); + bool result; int err; if (len > ds) @@ -161,17 +207,29 @@ static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, msg->msg_flags |= MSG_TRUNC; lock_sock(sk); + result = ctx->result; + err = hash_alloc_result(sk, ctx); + if (err) + goto unlock; + + ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); + if (ctx->more) { ctx->more = 0; - ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); err = af_alg_wait_for_completion(crypto_ahash_final(&ctx->req), &ctx->completion); if (err) goto unlock; + } else if (!result) { + err = af_alg_wait_for_completion( + crypto_ahash_digest(&ctx->req), + &ctx->completion); } err = memcpy_to_msg(msg, ctx->result, len); + hash_free_result(sk, ctx); + unlock: release_sock(sk); @@ -394,8 +452,7 @@ static void hash_sock_destruct(struct sock *sk) struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; - sock_kzfree_s(sk, ctx->result, - crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req))); + hash_free_result(sk, ctx); sock_kfree_s(sk, ctx, ctx->len); af_alg_release_parent(sk); } @@ -407,20 +464,12 @@ static int hash_accept_parent_nokey(void *private, struct sock *sk) struct algif_hash_tfm *tfm = private; struct crypto_ahash *hash = tfm->hash; unsigned len = sizeof(*ctx) + crypto_ahash_reqsize(hash); - unsigned ds = crypto_ahash_digestsize(hash); ctx = sock_kmalloc(sk, len, GFP_KERNEL); if (!ctx) return -ENOMEM; - ctx->result = sock_kmalloc(sk, ds, GFP_KERNEL); - if (!ctx->result) { - sock_kfree_s(sk, ctx, len); - return -ENOMEM; - } - - memset(ctx->result, 0, ds); - + ctx->result = NULL; ctx->len = len; ctx->more = 0; af_alg_init_completion(&ctx->completion); |