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Merge git://github.com/herbertx/crypto 

* git://github.com/herbertx/crypto:
  crypto: ghash - Avoid null pointer dereference if no key is set
This commit is contained in:
Linus Torvalds 2011-10-21 17:02:18 +03:00
parent 62ddc0046e 7ed47b7d14
commit 2efd7c0fdc
1 changed files with 6 additions and 0 deletions
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6
crypto/ghash-generic.c
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@ -67,6 +67,9 @@ static int ghash_update(struct shash_desc *desc,
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm); struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
u8 *dst = dctx->buffer; u8 *dst = dctx->buffer;
if (!ctx->gf128)
return -ENOKEY;
if (dctx->bytes) { if (dctx->bytes) {
int n = min(srclen, dctx->bytes); int n = min(srclen, dctx->bytes);
u8 *pos = dst + (GHASH_BLOCK_SIZE - dctx->bytes); u8 *pos = dst + (GHASH_BLOCK_SIZE - dctx->bytes);
@ -119,6 +122,9 @@ static int ghash_final(struct shash_desc *desc, u8 *dst)
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm); struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
u8 *buf = dctx->buffer; u8 *buf = dctx->buffer;
if (!ctx->gf128)
return -ENOKEY;
ghash_flush(ctx, dctx); ghash_flush(ctx, dctx);
memcpy(dst, buf, GHASH_BLOCK_SIZE); memcpy(dst, buf, GHASH_BLOCK_SIZE);