crypto: nx - Fix reentrancy bugs
This patch fixes a host of reentrancy bugs in the nx driver. The following algorithms are affected: * CCM * GCM * CTR * XCBC * SHA256 * SHA512 The crypto API allows a single transform to be used by multiple threads simultaneously. For example, IPsec will use a single tfm to process packets for a given SA. As packets may arrive on multiple CPUs that tfm must be reentrant. The nx driver does try to deal with this by using a spin lock. Unfortunately only the basic AES/CBC/ECB algorithms do this in the correct way. The symptom of these bugs may range from the generation of incorrect output to memory corruption. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
Родитель
acb33cc541
Коммит
030f4e9687
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@ -494,8 +494,9 @@ out:
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static int ccm4309_aes_nx_encrypt(struct aead_request *req)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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struct blkcipher_desc desc;
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u8 *iv = nx_ctx->priv.ccm.iv;
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u8 *iv = rctx->iv;
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iv[0] = 3;
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memcpy(iv + 1, nx_ctx->priv.ccm.nonce, 3);
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@ -525,8 +526,9 @@ static int ccm_aes_nx_encrypt(struct aead_request *req)
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static int ccm4309_aes_nx_decrypt(struct aead_request *req)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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struct blkcipher_desc desc;
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u8 *iv = nx_ctx->priv.ccm.iv;
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u8 *iv = rctx->iv;
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iv[0] = 3;
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memcpy(iv + 1, nx_ctx->priv.ccm.nonce, 3);
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@ -72,7 +72,7 @@ static int ctr3686_aes_nx_set_key(struct crypto_tfm *tfm,
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if (key_len < CTR_RFC3686_NONCE_SIZE)
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return -EINVAL;
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memcpy(nx_ctx->priv.ctr.iv,
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memcpy(nx_ctx->priv.ctr.nonce,
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in_key + key_len - CTR_RFC3686_NONCE_SIZE,
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CTR_RFC3686_NONCE_SIZE);
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@ -131,14 +131,15 @@ static int ctr3686_aes_nx_crypt(struct blkcipher_desc *desc,
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unsigned int nbytes)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
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u8 *iv = nx_ctx->priv.ctr.iv;
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u8 iv[16];
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memcpy(iv, nx_ctx->priv.ctr.nonce, CTR_RFC3686_IV_SIZE);
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memcpy(iv + CTR_RFC3686_NONCE_SIZE,
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desc->info, CTR_RFC3686_IV_SIZE);
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iv[12] = iv[13] = iv[14] = 0;
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iv[15] = 1;
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desc->info = nx_ctx->priv.ctr.iv;
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desc->info = iv;
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return ctr_aes_nx_crypt(desc, dst, src, nbytes);
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}
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@ -317,6 +317,7 @@ out:
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static int gcm_aes_nx_crypt(struct aead_request *req, int enc)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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struct blkcipher_desc desc;
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unsigned int nbytes = req->cryptlen;
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@ -326,7 +327,7 @@ static int gcm_aes_nx_crypt(struct aead_request *req, int enc)
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spin_lock_irqsave(&nx_ctx->lock, irq_flags);
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desc.info = nx_ctx->priv.gcm.iv;
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desc.info = rctx->iv;
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/* initialize the counter */
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*(u32 *)(desc.info + NX_GCM_CTR_OFFSET) = 1;
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@ -424,8 +425,8 @@ out:
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static int gcm_aes_nx_encrypt(struct aead_request *req)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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char *iv = nx_ctx->priv.gcm.iv;
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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char *iv = rctx->iv;
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memcpy(iv, req->iv, 12);
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@ -434,8 +435,8 @@ static int gcm_aes_nx_encrypt(struct aead_request *req)
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static int gcm_aes_nx_decrypt(struct aead_request *req)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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char *iv = nx_ctx->priv.gcm.iv;
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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char *iv = rctx->iv;
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memcpy(iv, req->iv, 12);
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@ -445,7 +446,8 @@ static int gcm_aes_nx_decrypt(struct aead_request *req)
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static int gcm4106_aes_nx_encrypt(struct aead_request *req)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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char *iv = nx_ctx->priv.gcm.iv;
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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char *iv = rctx->iv;
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char *nonce = nx_ctx->priv.gcm.nonce;
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memcpy(iv, nonce, NX_GCM4106_NONCE_LEN);
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@ -457,7 +459,8 @@ static int gcm4106_aes_nx_encrypt(struct aead_request *req)
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static int gcm4106_aes_nx_decrypt(struct aead_request *req)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
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char *iv = nx_ctx->priv.gcm.iv;
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struct nx_gcm_rctx *rctx = aead_request_ctx(req);
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char *iv = rctx->iv;
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char *nonce = nx_ctx->priv.gcm.nonce;
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memcpy(iv, nonce, NX_GCM4106_NONCE_LEN);
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@ -42,6 +42,7 @@ static int nx_xcbc_set_key(struct crypto_shash *desc,
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unsigned int key_len)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_shash_ctx(desc);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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switch (key_len) {
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case AES_KEYSIZE_128:
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@ -51,7 +52,7 @@ static int nx_xcbc_set_key(struct crypto_shash *desc,
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return -EINVAL;
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}
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memcpy(nx_ctx->priv.xcbc.key, in_key, key_len);
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memcpy(csbcpb->cpb.aes_xcbc.key, in_key, key_len);
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return 0;
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}
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@ -148,32 +149,29 @@ out:
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return rc;
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}
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static int nx_xcbc_init(struct shash_desc *desc)
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static int nx_crypto_ctx_aes_xcbc_init2(struct crypto_tfm *tfm)
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{
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struct xcbc_state *sctx = shash_desc_ctx(desc);
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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struct nx_sg *out_sg;
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int len;
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int err;
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err = nx_crypto_ctx_aes_xcbc_init(tfm);
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if (err)
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return err;
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nx_ctx_init(nx_ctx, HCOP_FC_AES);
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memset(sctx, 0, sizeof *sctx);
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
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csbcpb->cpb.hdr.mode = NX_MODE_AES_XCBC_MAC;
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memcpy(csbcpb->cpb.aes_xcbc.key, nx_ctx->priv.xcbc.key, AES_BLOCK_SIZE);
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memset(nx_ctx->priv.xcbc.key, 0, sizeof *nx_ctx->priv.xcbc.key);
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return 0;
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}
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len = AES_BLOCK_SIZE;
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out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
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&len, nx_ctx->ap->sglen);
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static int nx_xcbc_init(struct shash_desc *desc)
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{
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struct xcbc_state *sctx = shash_desc_ctx(desc);
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if (len != AES_BLOCK_SIZE)
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return -EINVAL;
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nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
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memset(sctx, 0, sizeof *sctx);
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return 0;
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}
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@ -186,6 +184,7 @@ static int nx_xcbc_update(struct shash_desc *desc,
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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struct nx_sg *in_sg;
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struct nx_sg *out_sg;
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u32 to_process = 0, leftover, total;
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unsigned int max_sg_len;
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unsigned long irq_flags;
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@ -213,6 +212,17 @@ static int nx_xcbc_update(struct shash_desc *desc,
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max_sg_len = min_t(u64, max_sg_len,
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nx_ctx->ap->databytelen/NX_PAGE_SIZE);
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data_len = AES_BLOCK_SIZE;
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out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
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&len, nx_ctx->ap->sglen);
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if (data_len != AES_BLOCK_SIZE) {
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rc = -EINVAL;
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goto out;
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}
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nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
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do {
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to_process = total - to_process;
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to_process = to_process & ~(AES_BLOCK_SIZE - 1);
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@ -235,8 +245,10 @@ static int nx_xcbc_update(struct shash_desc *desc,
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(u8 *) sctx->buffer,
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&data_len,
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max_sg_len);
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if (data_len != sctx->count)
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return -EINVAL;
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if (data_len != sctx->count) {
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rc = -EINVAL;
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goto out;
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}
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}
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data_len = to_process - sctx->count;
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@ -245,8 +257,10 @@ static int nx_xcbc_update(struct shash_desc *desc,
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&data_len,
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max_sg_len);
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if (data_len != to_process - sctx->count)
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return -EINVAL;
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if (data_len != to_process - sctx->count) {
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rc = -EINVAL;
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goto out;
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}
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nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) *
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sizeof(struct nx_sg);
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@ -325,15 +339,19 @@ static int nx_xcbc_final(struct shash_desc *desc, u8 *out)
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in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)sctx->buffer,
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&len, nx_ctx->ap->sglen);
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if (len != sctx->count)
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return -EINVAL;
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if (len != sctx->count) {
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rc = -EINVAL;
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goto out;
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}
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len = AES_BLOCK_SIZE;
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out_sg = nx_build_sg_list(nx_ctx->out_sg, out, &len,
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nx_ctx->ap->sglen);
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if (len != AES_BLOCK_SIZE)
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return -EINVAL;
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if (len != AES_BLOCK_SIZE) {
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rc = -EINVAL;
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goto out;
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}
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nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
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nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
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@ -372,7 +390,7 @@ struct shash_alg nx_shash_aes_xcbc_alg = {
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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.cra_ctxsize = sizeof(struct nx_crypto_ctx),
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.cra_init = nx_crypto_ctx_aes_xcbc_init,
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.cra_init = nx_crypto_ctx_aes_xcbc_init2,
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.cra_exit = nx_crypto_ctx_exit,
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}
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};
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@ -29,34 +29,28 @@
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#include "nx.h"
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static int nx_sha256_init(struct shash_desc *desc)
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static int nx_crypto_ctx_sha256_init(struct crypto_tfm *tfm)
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{
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struct sha256_state *sctx = shash_desc_ctx(desc);
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
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struct nx_sg *out_sg;
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int len;
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u32 max_sg_len;
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
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int err;
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err = nx_crypto_ctx_sha_init(tfm);
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if (err)
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return err;
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nx_ctx_init(nx_ctx, HCOP_FC_SHA);
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memset(sctx, 0, sizeof *sctx);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA256];
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NX_CPB_SET_DIGEST_SIZE(nx_ctx->csbcpb, NX_DS_SHA256);
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max_sg_len = min_t(u64, nx_ctx->ap->sglen,
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nx_driver.of.max_sg_len/sizeof(struct nx_sg));
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max_sg_len = min_t(u64, max_sg_len,
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nx_ctx->ap->databytelen/NX_PAGE_SIZE);
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return 0;
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}
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len = SHA256_DIGEST_SIZE;
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out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
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&len, max_sg_len);
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nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
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static int nx_sha256_init(struct shash_desc *desc) {
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struct sha256_state *sctx = shash_desc_ctx(desc);
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if (len != SHA256_DIGEST_SIZE)
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return -EINVAL;
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memset(sctx, 0, sizeof *sctx);
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sctx->state[0] = __cpu_to_be32(SHA256_H0);
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sctx->state[1] = __cpu_to_be32(SHA256_H1);
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@ -78,6 +72,7 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
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struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
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struct nx_sg *in_sg;
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struct nx_sg *out_sg;
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u64 to_process = 0, leftover, total;
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unsigned long irq_flags;
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int rc = 0;
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@ -108,6 +103,16 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
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max_sg_len = min_t(u64, max_sg_len,
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nx_ctx->ap->databytelen/NX_PAGE_SIZE);
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data_len = SHA256_DIGEST_SIZE;
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out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
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&data_len, max_sg_len);
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nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
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if (data_len != SHA256_DIGEST_SIZE) {
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rc = -EINVAL;
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goto out;
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}
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do {
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/*
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* to_process: the SHA256_BLOCK_SIZE data chunk to process in
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@ -282,7 +287,7 @@ struct shash_alg nx_shash_sha256_alg = {
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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.cra_ctxsize = sizeof(struct nx_crypto_ctx),
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.cra_init = nx_crypto_ctx_sha_init,
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.cra_init = nx_crypto_ctx_sha256_init,
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.cra_exit = nx_crypto_ctx_exit,
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}
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};
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|
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@ -28,34 +28,29 @@
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#include "nx.h"
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static int nx_sha512_init(struct shash_desc *desc)
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static int nx_crypto_ctx_sha512_init(struct crypto_tfm *tfm)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
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struct nx_sg *out_sg;
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int len;
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u32 max_sg_len;
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struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
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int err;
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|
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err = nx_crypto_ctx_sha_init(tfm);
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if (err)
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return err;
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nx_ctx_init(nx_ctx, HCOP_FC_SHA);
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memset(sctx, 0, sizeof *sctx);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA512];
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NX_CPB_SET_DIGEST_SIZE(nx_ctx->csbcpb, NX_DS_SHA512);
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max_sg_len = min_t(u64, nx_ctx->ap->sglen,
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nx_driver.of.max_sg_len/sizeof(struct nx_sg));
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max_sg_len = min_t(u64, max_sg_len,
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nx_ctx->ap->databytelen/NX_PAGE_SIZE);
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return 0;
|
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}
|
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|
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len = SHA512_DIGEST_SIZE;
|
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out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
|
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&len, max_sg_len);
|
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nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
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static int nx_sha512_init(struct shash_desc *desc)
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{
|
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struct sha512_state *sctx = shash_desc_ctx(desc);
|
||||
|
||||
if (len != SHA512_DIGEST_SIZE)
|
||||
return -EINVAL;
|
||||
memset(sctx, 0, sizeof *sctx);
|
||||
|
||||
sctx->state[0] = __cpu_to_be64(SHA512_H0);
|
||||
sctx->state[1] = __cpu_to_be64(SHA512_H1);
|
||||
|
|
@ -77,6 +72,7 @@ static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
|
|||
struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
|
||||
struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
|
||||
struct nx_sg *in_sg;
|
||||
struct nx_sg *out_sg;
|
||||
u64 to_process, leftover = 0, total;
|
||||
unsigned long irq_flags;
|
||||
int rc = 0;
|
||||
|
|
@ -107,6 +103,16 @@ static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
|
|||
max_sg_len = min_t(u64, max_sg_len,
|
||||
nx_ctx->ap->databytelen/NX_PAGE_SIZE);
|
||||
|
||||
data_len = SHA512_DIGEST_SIZE;
|
||||
out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
|
||||
&data_len, max_sg_len);
|
||||
nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
|
||||
|
||||
if (data_len != SHA512_DIGEST_SIZE) {
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
do {
|
||||
/*
|
||||
* to_process: the SHA512_BLOCK_SIZE data chunk to process in
|
||||
|
|
@ -288,7 +294,7 @@ struct shash_alg nx_shash_sha512_alg = {
|
|||
.cra_blocksize = SHA512_BLOCK_SIZE,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_ctxsize = sizeof(struct nx_crypto_ctx),
|
||||
.cra_init = nx_crypto_ctx_sha_init,
|
||||
.cra_init = nx_crypto_ctx_sha512_init,
|
||||
.cra_exit = nx_crypto_ctx_exit,
|
||||
}
|
||||
};
|
||||
|
|
|
|||
|
|
@ -713,12 +713,15 @@ static int nx_crypto_ctx_init(struct nx_crypto_ctx *nx_ctx, u32 fc, u32 mode)
|
|||
/* entry points from the crypto tfm initializers */
|
||||
int nx_crypto_ctx_aes_ccm_init(struct crypto_tfm *tfm)
|
||||
{
|
||||
crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
|
||||
sizeof(struct nx_ccm_rctx));
|
||||
return nx_crypto_ctx_init(crypto_tfm_ctx(tfm), NX_FC_AES,
|
||||
NX_MODE_AES_CCM);
|
||||
}
|
||||
|
||||
int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm)
|
||||
{
|
||||
crypto_aead_set_reqsize(tfm, sizeof(struct nx_gcm_rctx));
|
||||
return nx_crypto_ctx_init(crypto_aead_ctx(tfm), NX_FC_AES,
|
||||
NX_MODE_AES_GCM);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,6 +2,8 @@
|
|||
#ifndef __NX_H__
|
||||
#define __NX_H__
|
||||
|
||||
#include <crypto/ctr.h>
|
||||
|
||||
#define NX_NAME "nx-crypto"
|
||||
#define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver"
|
||||
#define NX_VERSION "1.0"
|
||||
|
|
@ -91,8 +93,11 @@ struct nx_crypto_driver {
|
|||
|
||||
#define NX_GCM4106_NONCE_LEN (4)
|
||||
#define NX_GCM_CTR_OFFSET (12)
|
||||
struct nx_gcm_priv {
|
||||
struct nx_gcm_rctx {
|
||||
u8 iv[16];
|
||||
};
|
||||
|
||||
struct nx_gcm_priv {
|
||||
u8 iauth_tag[16];
|
||||
u8 nonce[NX_GCM4106_NONCE_LEN];
|
||||
};
|
||||
|
|
@ -100,8 +105,11 @@ struct nx_gcm_priv {
|
|||
#define NX_CCM_AES_KEY_LEN (16)
|
||||
#define NX_CCM4309_AES_KEY_LEN (19)
|
||||
#define NX_CCM4309_NONCE_LEN (3)
|
||||
struct nx_ccm_priv {
|
||||
struct nx_ccm_rctx {
|
||||
u8 iv[16];
|
||||
};
|
||||
|
||||
struct nx_ccm_priv {
|
||||
u8 b0[16];
|
||||
u8 iauth_tag[16];
|
||||
u8 oauth_tag[16];
|
||||
|
|
@ -113,7 +121,7 @@ struct nx_xcbc_priv {
|
|||
};
|
||||
|
||||
struct nx_ctr_priv {
|
||||
u8 iv[16];
|
||||
u8 nonce[CTR_RFC3686_NONCE_SIZE];
|
||||
};
|
||||
|
||||
struct nx_crypto_ctx {
|
||||
|
|
|
|||
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