diff options
Diffstat (limited to 'crypto/lskcipher.c')
| -rw-r--r-- | crypto/lskcipher.c | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/crypto/lskcipher.c b/crypto/lskcipher.c index 9edc89730951..0b6dd8aa21f2 100644 --- a/crypto/lskcipher.c +++ b/crypto/lskcipher.c @@ -88,8 +88,9 @@ EXPORT_SYMBOL_GPL(crypto_lskcipher_setkey); static int crypto_lskcipher_crypt_unaligned( struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len, u8 *iv, int (*crypt)(struct crypto_lskcipher *tfm, const u8 *src, - u8 *dst, unsigned len, u8 *iv, bool final)) + u8 *dst, unsigned len, u8 *iv, u32 flags)) { + unsigned statesize = crypto_lskcipher_statesize(tfm); unsigned ivsize = crypto_lskcipher_ivsize(tfm); unsigned bs = crypto_lskcipher_blocksize(tfm); unsigned cs = crypto_lskcipher_chunksize(tfm); @@ -104,7 +105,7 @@ static int crypto_lskcipher_crypt_unaligned( if (!tiv) return -ENOMEM; - memcpy(tiv, iv, ivsize); + memcpy(tiv, iv, ivsize + statesize); p = kmalloc(PAGE_SIZE, GFP_ATOMIC); err = -ENOMEM; @@ -119,7 +120,7 @@ static int crypto_lskcipher_crypt_unaligned( chunk &= ~(cs - 1); memcpy(p, src, chunk); - err = crypt(tfm, p, p, chunk, tiv, true); + err = crypt(tfm, p, p, chunk, tiv, CRYPTO_LSKCIPHER_FLAG_FINAL); if (err) goto out; @@ -132,7 +133,7 @@ static int crypto_lskcipher_crypt_unaligned( err = len ? -EINVAL : 0; out: - memcpy(iv, tiv, ivsize); + memcpy(iv, tiv, ivsize + statesize); kfree_sensitive(p); kfree_sensitive(tiv); return err; @@ -143,7 +144,7 @@ static int crypto_lskcipher_crypt(struct crypto_lskcipher *tfm, const u8 *src, int (*crypt)(struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len, u8 *iv, - bool final)) + u32 flags)) { unsigned long alignmask = crypto_lskcipher_alignmask(tfm); struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm); @@ -156,7 +157,7 @@ static int crypto_lskcipher_crypt(struct crypto_lskcipher *tfm, const u8 *src, goto out; } - ret = crypt(tfm, src, dst, len, iv, true); + ret = crypt(tfm, src, dst, len, iv, CRYPTO_LSKCIPHER_FLAG_FINAL); out: return crypto_lskcipher_errstat(alg, ret); @@ -197,23 +198,45 @@ EXPORT_SYMBOL_GPL(crypto_lskcipher_decrypt); static int crypto_lskcipher_crypt_sg(struct skcipher_request *req, int (*crypt)(struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, - unsigned len, u8 *iv, - bool final)) + unsigned len, u8 *ivs, + u32 flags)) { struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher); + u8 *ivs = skcipher_request_ctx(req); struct crypto_lskcipher *tfm = *ctx; struct skcipher_walk walk; + unsigned ivsize; + u32 flags; int err; + ivsize = crypto_lskcipher_ivsize(tfm); + ivs = PTR_ALIGN(ivs, crypto_skcipher_alignmask(skcipher) + 1); + + flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; + + if (req->base.flags & CRYPTO_SKCIPHER_REQ_CONT) + flags |= CRYPTO_LSKCIPHER_FLAG_CONT; + else + memcpy(ivs, req->iv, ivsize); + + if (!(req->base.flags & CRYPTO_SKCIPHER_REQ_NOTFINAL)) + flags |= CRYPTO_LSKCIPHER_FLAG_FINAL; + err = skcipher_walk_virt(&walk, req, false); while (walk.nbytes) { err = crypt(tfm, walk.src.virt.addr, walk.dst.virt.addr, - walk.nbytes, walk.iv, walk.nbytes == walk.total); + walk.nbytes, ivs, + flags & ~(walk.nbytes == walk.total ? + 0 : CRYPTO_LSKCIPHER_FLAG_FINAL)); err = skcipher_walk_done(&walk, err); + flags |= CRYPTO_LSKCIPHER_FLAG_CONT; } + if (flags & CRYPTO_LSKCIPHER_FLAG_FINAL) + memcpy(req->iv, ivs, ivsize); + return err; } @@ -276,6 +299,7 @@ static void __maybe_unused crypto_lskcipher_show( seq_printf(m, "max keysize : %u\n", skcipher->co.max_keysize); seq_printf(m, "ivsize : %u\n", skcipher->co.ivsize); seq_printf(m, "chunksize : %u\n", skcipher->co.chunksize); + seq_printf(m, "statesize : %u\n", skcipher->co.statesize); } static int __maybe_unused crypto_lskcipher_report( @@ -618,6 +642,7 @@ struct lskcipher_instance *lskcipher_alloc_instance_simple( inst->alg.co.min_keysize = cipher_alg->co.min_keysize; inst->alg.co.max_keysize = cipher_alg->co.max_keysize; inst->alg.co.ivsize = cipher_alg->co.base.cra_blocksize; + inst->alg.co.statesize = cipher_alg->co.statesize; /* Use struct crypto_lskcipher * by default, can be overridden */ inst->alg.co.base.cra_ctxsize = sizeof(struct crypto_lskcipher *); |