diff options
| -rw-r--r-- | drivers/crypto/nx/nx-aes-xcbc.c | 81 |
1 files changed, 63 insertions, 18 deletions
diff --git a/drivers/crypto/nx/nx-aes-xcbc.c b/drivers/crypto/nx/nx-aes-xcbc.c index 03c4bf57d066..8c2faffab4a3 100644 --- a/drivers/crypto/nx/nx-aes-xcbc.c +++ b/drivers/crypto/nx/nx-aes-xcbc.c @@ -75,6 +75,7 @@ static int nx_xcbc_empty(struct shash_desc *desc, u8 *out) u8 keys[2][AES_BLOCK_SIZE]; u8 key[32]; int rc = 0; + int len; /* Change to ECB mode */ csbcpb->cpb.hdr.mode = NX_MODE_AES_ECB; @@ -86,11 +87,20 @@ static int nx_xcbc_empty(struct shash_desc *desc, u8 *out) memset(keys[0], 0x01, sizeof(keys[0])); memset(keys[1], 0x03, sizeof(keys[1])); + len = sizeof(keys); /* Generate K1 and K3 encrypting the patterns */ - in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) keys, sizeof(keys), + in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) keys, &len, nx_ctx->ap->sglen); - out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *) keys, sizeof(keys), + + if (len != sizeof(keys)) + return -EINVAL; + + out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *) keys, &len, nx_ctx->ap->sglen); + + if (len != sizeof(keys)) + return -EINVAL; + nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg); nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg); @@ -103,12 +113,23 @@ static int nx_xcbc_empty(struct shash_desc *desc, u8 *out) /* XOr K3 with the padding for a 0 length message */ keys[1][0] ^= 0x80; + len = sizeof(keys[1]); + /* Encrypt the final result */ memcpy(csbcpb->cpb.aes_ecb.key, keys[0], AES_BLOCK_SIZE); - in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) keys[1], sizeof(keys[1]), + in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) keys[1], &len, nx_ctx->ap->sglen); - out_sg = nx_build_sg_list(nx_ctx->out_sg, out, AES_BLOCK_SIZE, + + if (len != sizeof(keys[1])) + return -EINVAL; + + len = AES_BLOCK_SIZE; + out_sg = nx_build_sg_list(nx_ctx->out_sg, out, &len, nx_ctx->ap->sglen); + + if (len != AES_BLOCK_SIZE) + return -EINVAL; + nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg); nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg); @@ -133,6 +154,7 @@ static int nx_xcbc_init(struct shash_desc *desc) struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base); struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; struct nx_sg *out_sg; + int len; nx_ctx_init(nx_ctx, HCOP_FC_AES); @@ -144,8 +166,13 @@ static int nx_xcbc_init(struct shash_desc *desc) memcpy(csbcpb->cpb.aes_xcbc.key, nx_ctx->priv.xcbc.key, AES_BLOCK_SIZE); memset(nx_ctx->priv.xcbc.key, 0, sizeof *nx_ctx->priv.xcbc.key); + len = AES_BLOCK_SIZE; out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state, - AES_BLOCK_SIZE, nx_ctx->ap->sglen); + &len, nx_ctx->ap->sglen); + + if (len != AES_BLOCK_SIZE) + return -EINVAL; + nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg); return 0; @@ -159,10 +186,11 @@ static int nx_xcbc_update(struct shash_desc *desc, struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base); struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; struct nx_sg *in_sg; - u32 to_process, leftover, total; - u32 max_sg_len; + u32 to_process = 0, leftover, total; + unsigned int max_sg_len; unsigned long irq_flags; int rc = 0; + int data_len; spin_lock_irqsave(&nx_ctx->lock, irq_flags); @@ -180,17 +208,15 @@ static int nx_xcbc_update(struct shash_desc *desc, } in_sg = nx_ctx->in_sg; - max_sg_len = min_t(u32, nx_driver.of.max_sg_len/sizeof(struct nx_sg), + max_sg_len = min_t(u64, nx_driver.of.max_sg_len/sizeof(struct nx_sg), nx_ctx->ap->sglen); + max_sg_len = min_t(u64, max_sg_len, + nx_ctx->ap->databytelen/NX_PAGE_SIZE); do { - - /* to_process: the AES_BLOCK_SIZE data chunk to process in this - * update */ - to_process = min_t(u64, total, nx_ctx->ap->databytelen); - to_process = min_t(u64, to_process, - NX_PAGE_SIZE * (max_sg_len - 1)); + to_process = total - to_process; to_process = to_process & ~(AES_BLOCK_SIZE - 1); + leftover = total - to_process; /* the hardware will not accept a 0 byte operation for this @@ -204,15 +230,24 @@ static int nx_xcbc_update(struct shash_desc *desc, } if (sctx->count) { + data_len = sctx->count; in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) sctx->buffer, - sctx->count, + &data_len, max_sg_len); + if (data_len != sctx->count) + return -EINVAL; } + + data_len = to_process - sctx->count; in_sg = nx_build_sg_list(in_sg, (u8 *) data, - to_process - sctx->count, + &data_len, max_sg_len); + + if (data_len != to_process - sctx->count) + return -EINVAL; + nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg); @@ -263,6 +298,7 @@ static int nx_xcbc_final(struct shash_desc *desc, u8 *out) struct nx_sg *in_sg, *out_sg; unsigned long irq_flags; int rc = 0; + int len; spin_lock_irqsave(&nx_ctx->lock, irq_flags); @@ -285,11 +321,20 @@ static int nx_xcbc_final(struct shash_desc *desc, u8 *out) * this is not an intermediate operation */ NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE; + len = sctx->count; in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)sctx->buffer, - sctx->count, nx_ctx->ap->sglen); - out_sg = nx_build_sg_list(nx_ctx->out_sg, out, AES_BLOCK_SIZE, + &len, nx_ctx->ap->sglen); + + if (len != sctx->count) + return -EINVAL; + + len = AES_BLOCK_SIZE; + out_sg = nx_build_sg_list(nx_ctx->out_sg, out, &len, nx_ctx->ap->sglen); + if (len != AES_BLOCK_SIZE) + return -EINVAL; + nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg); nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg); |