diff options
Diffstat (limited to 'crypto/ccm.c')
| -rw-r--r-- | crypto/ccm.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/crypto/ccm.c b/crypto/ccm.c index a9453129c51cb..36f0acec32e19 100644 --- a/crypto/ccm.c +++ b/crypto/ccm.c @@ -56,6 +56,7 @@ struct cbcmac_tfm_ctx { struct cbcmac_desc_ctx { unsigned int len; + u8 dg[]; }; static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx( @@ -447,10 +448,10 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl, const char *ctr_name, const char *mac_name) { + struct skcipher_alg_common *ctr; u32 mask; struct aead_instance *inst; struct ccm_instance_ctx *ictx; - struct skcipher_alg *ctr; struct hash_alg_common *mac; int err; @@ -478,13 +479,12 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl, ctr_name, 0, mask); if (err) goto err_free_inst; - ctr = crypto_spawn_skcipher_alg(&ictx->ctr); + ctr = crypto_spawn_skcipher_alg_common(&ictx->ctr); /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */ err = -EINVAL; if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 || - crypto_skcipher_alg_ivsize(ctr) != 16 || - ctr->base.cra_blocksize != 1) + ctr->ivsize != 16 || ctr->base.cra_blocksize != 1) goto err_free_inst; /* ctr and cbcmac must use the same underlying block cipher. */ @@ -504,10 +504,9 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl, inst->alg.base.cra_priority = (mac->base.cra_priority + ctr->base.cra_priority) / 2; inst->alg.base.cra_blocksize = 1; - inst->alg.base.cra_alignmask = mac->base.cra_alignmask | - ctr->base.cra_alignmask; + inst->alg.base.cra_alignmask = ctr->base.cra_alignmask; inst->alg.ivsize = 16; - inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr); + inst->alg.chunksize = ctr->chunksize; inst->alg.maxauthsize = 16; inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx); inst->alg.init = crypto_ccm_init_tfm; @@ -786,10 +785,9 @@ 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(dg, 0, bs); + memset(ctx->dg, 0, bs); return 0; } @@ -802,18 +800,17 @@ 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(dg + ctx->len, p, l); + crypto_xor(&ctx->dg[ctx->len], p, l); ctx->len +=l; len -= l; p += l; if (ctx->len == bs) { - crypto_cipher_encrypt_one(tfm, dg, dg); + crypto_cipher_encrypt_one(tfm, ctx->dg, ctx->dg); ctx->len = 0; } } @@ -828,12 +825,11 @@ 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, dg, dg); + crypto_cipher_encrypt_one(tfm, ctx->dg, ctx->dg); - memcpy(out, dg, bs); + memcpy(out, ctx->dg, bs); return 0; } @@ -890,8 +886,7 @@ 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 = ALIGN(sizeof(struct cbcmac_desc_ctx), - alg->cra_alignmask + 1) + + inst->alg.descsize = sizeof(struct cbcmac_desc_ctx) + alg->cra_blocksize; inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx); |