diff options
| -rw-r--r-- | crypto/ccm.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/crypto/ccm.c b/crypto/ccm.c index 52e307807ff6..24c26ab052ca 100644 --- a/crypto/ccm.c +++ b/crypto/ccm.c @@ -58,7 +58,6 @@ struct cbcmac_tfm_ctx { struct cbcmac_desc_ctx { unsigned int len; - u8 dg[]; }; static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx( @@ -868,9 +867,10 @@ static int crypto_cbcmac_digest_init(struct shash_desc *pdesc) { struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); int bs = crypto_shash_digestsize(pdesc->tfm); + u8 *dg = (u8 *)ctx + crypto_shash_descsize(pdesc->tfm) - bs; ctx->len = 0; - memset(ctx->dg, 0, bs); + memset(dg, 0, bs); return 0; } @@ -883,17 +883,18 @@ static int crypto_cbcmac_digest_update(struct shash_desc *pdesc, const u8 *p, struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); struct crypto_cipher *tfm = tctx->child; int bs = crypto_shash_digestsize(parent); + u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs; while (len > 0) { unsigned int l = min(len, bs - ctx->len); - crypto_xor(ctx->dg + ctx->len, p, l); + crypto_xor(dg + ctx->len, p, l); ctx->len +=l; len -= l; p += l; if (ctx->len == bs) { - crypto_cipher_encrypt_one(tfm, ctx->dg, ctx->dg); + crypto_cipher_encrypt_one(tfm, dg, dg); ctx->len = 0; } } @@ -908,12 +909,12 @@ static int crypto_cbcmac_digest_final(struct shash_desc *pdesc, u8 *out) struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); struct crypto_cipher *tfm = tctx->child; int bs = crypto_shash_digestsize(parent); + u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs; if (ctx->len) - crypto_cipher_encrypt_one(tfm, out, ctx->dg); - else - memcpy(out, ctx->dg, bs); + crypto_cipher_encrypt_one(tfm, dg, dg); + memcpy(out, dg, bs); return 0; } @@ -969,7 +970,8 @@ static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb) inst->alg.base.cra_blocksize = 1; inst->alg.digestsize = alg->cra_blocksize; - inst->alg.descsize = sizeof(struct cbcmac_desc_ctx) + + inst->alg.descsize = ALIGN(sizeof(struct cbcmac_desc_ctx), + alg->cra_alignmask + 1) + alg->cra_blocksize; inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx); |