diff options
author | Kent Yoder <key@linux.vnet.ibm.com> | 2012-04-05 20:34:20 +0800 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2012-04-05 20:34:20 +0800 |
commit | c93a811cd67a1ee2a3cd189a9a27d95199fcb8ee (patch) | |
tree | 597a970ad8da43830aada59aaee3988530f97813 /crypto | |
parent | f4766950a4645dcb08ae2882d7b50bd7b592084e (diff) | |
download | linux-crypto-c93a811cd67a1ee2a3cd189a9a27d95199fcb8ee.tar.gz linux-crypto-c93a811cd67a1ee2a3cd189a9a27d95199fcb8ee.zip |
crypto: sha512 - Fix byte counter overflow in SHA-512
The current code only increments the upper 64 bits of the SHA-512 byte
counter when the number of bytes hashed happens to hit 2^64 exactly.
This patch increments the upper 64 bits whenever the lower 64 bits
overflows.
Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
Cc: stable@kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to '')
-rw-r--r-- | crypto/sha512_generic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/sha512_generic.c b/crypto/sha512_generic.c index 107f6f7b..dd30f40a 100644 --- a/crypto/sha512_generic.c +++ b/crypto/sha512_generic.c @@ -174,7 +174,7 @@ sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len) index = sctx->count[0] & 0x7f; /* Update number of bytes */ - if (!(sctx->count[0] += len)) + if ((sctx->count[0] += len) < len) sctx->count[1]++; part_len = 128 - index; |