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| author | Harald Freudenberger <freude@linux.vnet.ibm.com> | 2015-05-21 10:01:11 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-05-22 11:23:03 +0800 |
| commit | a1cae34e23b1293eccbcc8ee9b39298039c3952a (patch) | |
| tree | e1d43c2c40d8bb1ce1ee2322acce92ff12fb54c0 /arch/s390/crypto | |
| parent | 7b2a18e05feb86f9be25602abfa9604a6b977f79 (diff) | |
| download | linux-a1cae34e23b1293eccbcc8ee9b39298039c3952a.tar.bz2 | |
crypto: s390/ghash - Fix incorrect ghash icv buffer handling.
Multitheaded tests showed that the icv buffer in the current ghash
implementation is not handled correctly. A move of this working ghash
buffer value to the descriptor context fixed this. Code is tested and
verified with an multithreaded application via af_alg interface.
Cc: stable@vger.kernel.org
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Gerald Schaefer <geraldsc@linux.vnet.ibm.com>
Reported-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/s390/crypto')
| -rw-r--r-- | arch/s390/crypto/ghash_s390.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/arch/s390/crypto/ghash_s390.c b/arch/s390/crypto/ghash_s390.c index 7940dc90e80b..b258110da952 100644 --- a/arch/s390/crypto/ghash_s390.c +++ b/arch/s390/crypto/ghash_s390.c @@ -16,11 +16,12 @@ #define GHASH_DIGEST_SIZE 16 struct ghash_ctx { - u8 icv[16]; - u8 key[16]; + u8 key[GHASH_BLOCK_SIZE]; }; struct ghash_desc_ctx { + u8 icv[GHASH_BLOCK_SIZE]; + u8 key[GHASH_BLOCK_SIZE]; u8 buffer[GHASH_BLOCK_SIZE]; u32 bytes; }; @@ -28,8 +29,10 @@ struct ghash_desc_ctx { static int ghash_init(struct shash_desc *desc) { struct ghash_desc_ctx *dctx = shash_desc_ctx(desc); + struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm); memset(dctx, 0, sizeof(*dctx)); + memcpy(dctx->key, ctx->key, GHASH_BLOCK_SIZE); return 0; } @@ -45,7 +48,6 @@ static int ghash_setkey(struct crypto_shash *tfm, } memcpy(ctx->key, key, GHASH_BLOCK_SIZE); - memset(ctx->icv, 0, GHASH_BLOCK_SIZE); return 0; } @@ -54,7 +56,6 @@ static int ghash_update(struct shash_desc *desc, const u8 *src, unsigned int srclen) { struct ghash_desc_ctx *dctx = shash_desc_ctx(desc); - struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm); unsigned int n; u8 *buf = dctx->buffer; int ret; @@ -70,7 +71,7 @@ static int ghash_update(struct shash_desc *desc, src += n; if (!dctx->bytes) { - ret = crypt_s390_kimd(KIMD_GHASH, ctx, buf, + ret = crypt_s390_kimd(KIMD_GHASH, dctx, buf, GHASH_BLOCK_SIZE); if (ret != GHASH_BLOCK_SIZE) return -EIO; @@ -79,7 +80,7 @@ static int ghash_update(struct shash_desc *desc, n = srclen & ~(GHASH_BLOCK_SIZE - 1); if (n) { - ret = crypt_s390_kimd(KIMD_GHASH, ctx, src, n); + ret = crypt_s390_kimd(KIMD_GHASH, dctx, src, n); if (ret != n) return -EIO; src += n; @@ -94,7 +95,7 @@ static int ghash_update(struct shash_desc *desc, return 0; } -static int ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx) +static int ghash_flush(struct ghash_desc_ctx *dctx) { u8 *buf = dctx->buffer; int ret; @@ -104,24 +105,24 @@ static int ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx) memset(pos, 0, dctx->bytes); - ret = crypt_s390_kimd(KIMD_GHASH, ctx, buf, GHASH_BLOCK_SIZE); + ret = crypt_s390_kimd(KIMD_GHASH, dctx, buf, GHASH_BLOCK_SIZE); if (ret != GHASH_BLOCK_SIZE) return -EIO; + + dctx->bytes = 0; } - dctx->bytes = 0; return 0; } static int ghash_final(struct shash_desc *desc, u8 *dst) { struct ghash_desc_ctx *dctx = shash_desc_ctx(desc); - struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm); int ret; - ret = ghash_flush(ctx, dctx); + ret = ghash_flush(dctx); if (!ret) - memcpy(dst, ctx->icv, GHASH_BLOCK_SIZE); + memcpy(dst, dctx->icv, GHASH_BLOCK_SIZE); return ret; } |