diff options
| author |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-04-17 14:24:35 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-04-17 14:24:35 +0100 |
| commit | 753e23ea588d353da9d0a2672828336453607265 (patch) | |
| tree | a0eb4875ecde41725fe890e27f52d69812031ea1 /crypto/gcm.c | |
| parent | ASoC: dmaengine_pcm: Add support for compat platforms (diff) | |
| parent | Linux 3.9-rc7 (diff) | |
| download | linux-dev-753e23ea588d353da9d0a2672828336453607265.tar.xz linux-dev-753e23ea588d353da9d0a2672828336453607265.zip | |
Merge tag 'v3.9-rc7' into asoc-dma
Linux 3.9-rc7
Diffstat (limited to 'crypto/gcm.c')
| -rw-r--r-- | crypto/gcm.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/crypto/gcm.c b/crypto/gcm.c index 137ad1ec5438..13ccbda34ff9 100644 --- a/crypto/gcm.c +++ b/crypto/gcm.c @@ -44,6 +44,7 @@ struct crypto_rfc4543_ctx { struct crypto_rfc4543_req_ctx { u8 auth_tag[16]; + u8 assocbuf[32]; struct scatterlist cipher[1]; struct scatterlist payload[2]; struct scatterlist assoc[2]; @@ -1133,9 +1134,19 @@ static struct aead_request *crypto_rfc4543_crypt(struct aead_request *req, scatterwalk_crypto_chain(payload, dst, vdst == req->iv + 8, 2); assoclen += 8 + req->cryptlen - (enc ? 0 : authsize); - sg_init_table(assoc, 2); - sg_set_page(assoc, sg_page(req->assoc), req->assoc->length, - req->assoc->offset); + if (req->assoc->length == req->assoclen) { + sg_init_table(assoc, 2); + sg_set_page(assoc, sg_page(req->assoc), req->assoc->length, + req->assoc->offset); + } else { + BUG_ON(req->assoclen > sizeof(rctx->assocbuf)); + + scatterwalk_map_and_copy(rctx->assocbuf, req->assoc, 0, + req->assoclen, 0); + + sg_init_table(assoc, 2); + sg_set_buf(assoc, rctx->assocbuf, req->assoclen); + } scatterwalk_crypto_chain(assoc, payload, 0, 2); aead_request_set_tfm(subreq, ctx->child); |