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charset="utf-8" Add support for SHA224, SHA256, SHA384, SHA512 algorithms in the Hashing Engine of the DTHEv2 hardware cryptographic engine. Signed-off-by: T Pratham --- drivers/crypto/ti/Kconfig | 2 + drivers/crypto/ti/Makefile | 2 +- drivers/crypto/ti/dthev2-aes.c | 10 +- drivers/crypto/ti/dthev2-common.c | 43 +- drivers/crypto/ti/dthev2-common.h | 52 ++- drivers/crypto/ti/dthev2-hash.c | 722 ++++++++++++++++++++++++++++++ 6 files changed, 814 insertions(+), 17 deletions(-) create mode 100644 drivers/crypto/ti/dthev2-hash.c diff --git a/drivers/crypto/ti/Kconfig b/drivers/crypto/ti/Kconfig index 1a3a571ac8cef..90af2c7cb1c55 100644 --- a/drivers/crypto/ti/Kconfig +++ b/drivers/crypto/ti/Kconfig @@ -10,6 +10,8 @@ config CRYPTO_DEV_TI_DTHEV2 select CRYPTO_XTS select CRYPTO_GCM select CRYPTO_CCM + select CRYPTO_SHA256 + select CRYPTO_SHA512 select SG_SPLIT help This enables support for the TI DTHE V2 hw cryptography engine diff --git a/drivers/crypto/ti/Makefile b/drivers/crypto/ti/Makefile index b883078f203d7..a90bc97a52321 100644 --- a/drivers/crypto/ti/Makefile +++ b/drivers/crypto/ti/Makefile @@ -1,3 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_CRYPTO_DEV_TI_DTHEV2) +=3D dthev2.o -dthev2-objs :=3D dthev2-common.o dthev2-aes.o +dthev2-objs :=3D dthev2-common.o dthev2-aes.o dthev2-hash.o diff --git a/drivers/crypto/ti/dthev2-aes.c b/drivers/crypto/ti/dthev2-aes.c index 3769fd7da8d0f..dd63cb27ed6d5 100644 --- a/drivers/crypto/ti/dthev2-aes.c +++ b/drivers/crypto/ti/dthev2-aes.c @@ -21,7 +21,6 @@ #include #include #include -#include #include =20 /* Registers */ @@ -105,7 +104,6 @@ enum aes_ctrl_mode_masks { #define DTHE_AES_GCM_AAD_MAXLEN (BIT_ULL(32) - 1) #define DTHE_AES_CCM_AAD_MAXLEN (BIT(16) - BIT(8)) #define DTHE_AES_CCM_CRYPT_MAXLEN (BIT_ULL(61) - 1) -#define POLL_TIMEOUT_INTERVAL HZ =20 static int dthe_cipher_init_tfm(struct crypto_skcipher *tfm) { @@ -508,7 +506,7 @@ static int dthe_aes_run(struct crypto_engine *engine, v= oid *areq) ret =3D dthe_aes_do_fallback(req); =20 local_bh_disable(); - crypto_finalize_skcipher_request(dev_data->engine, req, ret); + crypto_finalize_skcipher_request(engine, req, ret); local_bh_enable(); return 0; } @@ -543,7 +541,7 @@ static int dthe_aes_crypt(struct skcipher_request *req) return 0; } =20 - engine =3D dev_data->engine; + engine =3D dev_data->aes_engine; return crypto_transfer_skcipher_request_to_engine(engine, req); } =20 @@ -713,7 +711,7 @@ static int dthe_aead_read_tag(struct dthe_tfm_ctx *ctx,= u32 *tag) =20 ret =3D readl_relaxed_poll_timeout(aes_base_reg + DTHE_P_AES_CTRL, val, (val & DTHE_AES_CTRL_SAVED_CTX_READY), - 0, POLL_TIMEOUT_INTERVAL); + 0, DTHE_POLL_TIMEOUT_INTERVAL); if (ret) return ret; =20 @@ -1184,7 +1182,7 @@ static int dthe_aead_crypt(struct aead_request *req) (ctx->aes_mode =3D=3D DTHE_AES_CCM && !is_zero_ctr)) return dthe_aead_do_fallback(req); =20 - engine =3D dev_data->engine; + engine =3D dev_data->aes_engine; return crypto_transfer_aead_request_to_engine(engine, req); } =20 diff --git a/drivers/crypto/ti/dthev2-common.c b/drivers/crypto/ti/dthev2-c= ommon.c index 3844faf5fec1f..3eab3ef6c37cf 100644 --- a/drivers/crypto/ti/dthev2-common.c +++ b/drivers/crypto/ti/dthev2-common.c @@ -108,6 +108,11 @@ static int dthe_dma_init(struct dthe_data *dev_data) goto err_dma_sha_tx; } =20 + /* + * Do AES Rx and Tx channel config here because it is invariant of AES mo= de + * SHA Tx channel config is done before DMA transfer depending on hashing= algorithm + */ + memzero_explicit(&cfg, sizeof(cfg)); =20 cfg.src_addr_width =3D DMA_SLAVE_BUSWIDTH_4_BYTES; @@ -142,11 +147,21 @@ static int dthe_dma_init(struct dthe_data *dev_data) =20 static int dthe_register_algs(void) { - return dthe_register_aes_algs(); + int ret =3D 0; + + ret =3D dthe_register_hash_algs(); + if (ret) + return ret; + ret =3D dthe_register_aes_algs(); + if (ret) + dthe_unregister_hash_algs(); + + return ret; } =20 static void dthe_unregister_algs(void) { + dthe_unregister_hash_algs(); dthe_unregister_aes_algs(); } =20 @@ -175,15 +190,26 @@ static int dthe_probe(struct platform_device *pdev) if (ret) goto probe_dma_err; =20 - dev_data->engine =3D crypto_engine_alloc_init(dev, 1); - if (!dev_data->engine) { + dev_data->aes_engine =3D crypto_engine_alloc_init(dev, 1); + if (!dev_data->aes_engine) { ret =3D -ENOMEM; goto probe_engine_err; } + dev_data->hash_engine =3D crypto_engine_alloc_init(dev, 1); + if (!dev_data->hash_engine) { + ret =3D -ENOMEM; + goto probe_hash_engine_err; + } + + ret =3D crypto_engine_start(dev_data->aes_engine); + if (ret) { + dev_err(dev, "Failed to start crypto engine for AES\n"); + goto probe_engine_start_err; + } =20 - ret =3D crypto_engine_start(dev_data->engine); + ret =3D crypto_engine_start(dev_data->hash_engine); if (ret) { - dev_err(dev, "Failed to start crypto engine\n"); + dev_err(dev, "Failed to start crypto engine for hash\n"); goto probe_engine_start_err; } =20 @@ -196,7 +222,9 @@ static int dthe_probe(struct platform_device *pdev) return 0; =20 probe_engine_start_err: - crypto_engine_exit(dev_data->engine); + crypto_engine_exit(dev_data->hash_engine); +probe_hash_engine_err: + crypto_engine_exit(dev_data->aes_engine); probe_engine_err: dma_release_channel(dev_data->dma_aes_rx); dma_release_channel(dev_data->dma_aes_tx); @@ -227,7 +255,8 @@ static void dthe_remove(struct platform_device *pdev) list_del(&dev_data->list); spin_unlock(&dthe_dev_list.lock); =20 - crypto_engine_exit(dev_data->engine); + crypto_engine_exit(dev_data->aes_engine); + crypto_engine_exit(dev_data->hash_engine); =20 dma_release_channel(dev_data->dma_aes_rx); dma_release_channel(dev_data->dma_aes_tx); diff --git a/drivers/crypto/ti/dthev2-common.h b/drivers/crypto/ti/dthev2-c= ommon.h index 8eb27812b8cdf..97ba76340ffad 100644 --- a/drivers/crypto/ti/dthev2-common.h +++ b/drivers/crypto/ti/dthev2-common.h @@ -17,6 +17,7 @@ #include #include #include +#include =20 #include #include @@ -24,16 +25,28 @@ #include #include #include +#include #include =20 #define DTHE_REG_SIZE 4 #define DTHE_DMA_TIMEOUT_MS 2000 +#define DTHE_POLL_TIMEOUT_INTERVAL HZ /* * Size of largest possible key (of all algorithms) to be stored in dthe_t= fm_ctx * This is currently the keysize of XTS-AES-256 which is 512 bits (64 byte= s) */ #define DTHE_MAX_KEYSIZE (AES_MAX_KEY_SIZE * 2) =20 +enum dthe_hash_alg_sel { + DTHE_HASH_MD5 =3D 0, + DTHE_HASH_SHA1 =3D BIT(1), + DTHE_HASH_SHA224 =3D BIT(2), + DTHE_HASH_SHA256 =3D BIT(1) | BIT(2), + DTHE_HASH_SHA384 =3D BIT(0), + DTHE_HASH_SHA512 =3D BIT(0) | BIT(1), + DTHE_HASH_ERR =3D BIT(0) | BIT(1) | BIT(2), +}; + enum dthe_aes_mode { DTHE_AES_ECB =3D 0, DTHE_AES_CBC, @@ -50,7 +63,8 @@ enum dthe_aes_mode { * @dev: Device pointer * @regs: Base address of the register space * @list: list node for dev - * @engine: Crypto engine instance + * @aes_engine: Crypto engine instance for AES Engine + * @hash_engine: Crypto engine instance for Hashing Engine * @dma_aes_rx: AES Rx DMA Channel * @dma_aes_tx: AES Tx DMA Channel * @dma_sha_tx: SHA Tx DMA Channel @@ -60,7 +74,8 @@ struct dthe_data { struct device *dev; void __iomem *regs; struct list_head list; - struct crypto_engine *engine; + struct crypto_engine *aes_engine; + struct crypto_engine *hash_engine; =20 struct dma_chan *dma_aes_rx; struct dma_chan *dma_aes_tx; @@ -87,6 +102,8 @@ struct dthe_list { * @authsize: Authentication size for modes with authentication * @key: AES key * @aes_mode: AES mode + * @hash_mode: Hashing Engine mode + * @phash_size: partial hash size of the hash algorithm selected * @aead_fb: Fallback crypto aead handle * @skcipher_fb: Fallback crypto skcipher handle for AES-XTS mode */ @@ -95,7 +112,11 @@ struct dthe_tfm_ctx { unsigned int keylen; unsigned int authsize; u32 key[DTHE_MAX_KEYSIZE / sizeof(u32)]; - enum dthe_aes_mode aes_mode; + union { + enum dthe_aes_mode aes_mode; + enum dthe_hash_alg_sel hash_mode; + }; + unsigned int phash_size; union { struct crypto_sync_aead *aead_fb; struct crypto_sync_skcipher *skcipher_fb; @@ -114,6 +135,28 @@ struct dthe_aes_req_ctx { struct completion aes_compl; }; =20 +/** + * struct dthe_hash_req_ctx - Hashing engine ctx struct + * @phash: buffer to store a partial hash from a previous operation + * @digestcnt: stores the digest count from a previous operation; currentl= y hardware only provides + * a single 32-bit value even for SHA384/512 + * @padding: padding buffer for handling unaligned data + * @data: buffer to store one block of data to defer operations for non-ze= ro final. + * @flags: bitfield of flags for internal use. + * bit 0: Current operation (update/finup) + * bit 1: If phash is available from a previous operation + * bit 2: If data is buffered from a previous operation + * @hash_compl: Completion variable for use in manual completion in case o= f DMA callback failure + */ +struct dthe_hash_req_ctx { + u32 phash[SHA512_DIGEST_SIZE / sizeof(u32)]; + u64 digestcnt[2]; + u8 padding[SHA512_BLOCK_SIZE]; + u8 data[SHA512_BLOCK_SIZE]; + u8 flags; + struct completion hash_compl; +}; + /* Struct definitions end */ =20 struct dthe_data *dthe_get_dev(struct dthe_tfm_ctx *ctx); @@ -136,4 +179,7 @@ struct scatterlist *dthe_copy_sg(struct scatterlist *ds= t, int dthe_register_aes_algs(void); void dthe_unregister_aes_algs(void); =20 +int dthe_register_hash_algs(void); +void dthe_unregister_hash_algs(void); + #endif diff --git a/drivers/crypto/ti/dthev2-hash.c b/drivers/crypto/ti/dthev2-has= h.c new file mode 100644 index 0000000000000..ca0c04d40c769 --- /dev/null +++ b/drivers/crypto/ti/dthev2-hash.c @@ -0,0 +1,722 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * K3 DTHE V2 crypto accelerator driver + * + * Copyright (C) Texas Instruments 2025 - https://www.ti.com + * Author: T Pratham + */ + +#include +#include +#include +#include +#include + +#include "dthev2-common.h" + +#include +#include +#include +#include +#include +#include + +/* Registers */ + +#define DTHE_P_HASH_BASE 0x5000 +#define DTHE_P_HASH512_IDIGEST_A 0x0240 +#define DTHE_P_HASH512_DIGEST_COUNT 0x0280 +#define DTHE_P_HASH512_MODE 0x0284 +#define DTHE_P_HASH512_LENGTH 0x0288 +#define DTHE_P_HASH512_DATA_IN_START 0x0080 +#define DTHE_P_HASH512_DATA_IN_END 0x00FC + +#define DTHE_P_HASH_SYSCONFIG 0x0110 +#define DTHE_P_HASH_IRQSTATUS 0x0118 +#define DTHE_P_HASH_IRQENABLE 0x011C + +/* Register write values and macros */ +#define DTHE_HASH_SYSCONFIG_INT_EN BIT(2) +#define DTHE_HASH_SYSCONFIG_DMA_EN BIT(3) +#define DTHE_HASH_IRQENABLE_EN_ALL GENMASK(3, 0) +#define DTHE_HASH_IRQSTATUS_OP_READY BIT(0) +#define DTHE_HASH_IRQSTATUS_IP_READY BIT(1) +#define DTHE_HASH_IRQSTATUS_PH_READY BIT(2) +#define DTHE_HASH_IRQSTATUS_CTX_READY BIT(3) + +#define DTHE_HASH_MODE_USE_ALG_CONST BIT(3) +#define DTHE_HASH_MODE_CLOSE_HASH BIT(4) + +/* rctx flag bitfields */ +#define DTHE_HASH_FLAG_OP BIT(0) +#define DTHE_HASH_FLAG_PHASH_AVAIL BIT(1) +#define DTHE_HASH_FLAG_IS_DATA_HELD BIT(2) + +enum dthe_hash_op { + DTHE_HASH_OP_UPDATE =3D 0, + DTHE_HASH_OP_FINUP =3D 1, +}; + +static inline bool dthe_hash_has_flag(struct dthe_hash_req_ctx *rctx, u8 f= lag) +{ + return rctx->flags & flag; +} + +static inline void dthe_hash_flag_set(struct dthe_hash_req_ctx *rctx, u8 f= lag) +{ + rctx->flags |=3D flag; +} + +static inline void dthe_hash_flag_clear(struct dthe_hash_req_ctx *rctx, u8= flag) +{ + rctx->flags &=3D ~flag; +} + +static inline bool dthe_hash_flag_is_op(struct dthe_hash_req_ctx *rctx, en= um dthe_hash_op op) +{ + return FIELD_GET(DTHE_HASH_FLAG_OP, rctx->flags) =3D=3D op; +} + +static inline void dthe_hash_flag_set_op(struct dthe_hash_req_ctx *rctx, e= num dthe_hash_op op) +{ + FIELD_MODIFY(DTHE_HASH_FLAG_OP, &rctx->flags, op); +} + +static void dthe_hash_write_zero_message(enum dthe_hash_alg_sel mode, void= *dst) +{ + switch (mode) { + case DTHE_HASH_SHA512: + memcpy(dst, sha512_zero_message_hash, SHA512_DIGEST_SIZE); + break; + case DTHE_HASH_SHA384: + memcpy(dst, sha384_zero_message_hash, SHA384_DIGEST_SIZE); + break; + case DTHE_HASH_SHA256: + memcpy(dst, sha256_zero_message_hash, SHA256_DIGEST_SIZE); + break; + case DTHE_HASH_SHA224: + memcpy(dst, sha224_zero_message_hash, SHA224_DIGEST_SIZE); + break; + default: + break; + } +} + +static enum dthe_hash_alg_sel dthe_hash_get_hash_mode(struct crypto_ahash = *tfm) +{ + unsigned int ds =3D crypto_ahash_digestsize(tfm); + enum dthe_hash_alg_sel hash_mode; + + /* + * Currently, all hash algorithms supported by DTHEv2 have unique digest = sizes. + * So we can do this. Otherwise, we would have to get the algorithm from = the + * alg_name and do a strcmp. + */ + switch (ds) { + case SHA512_DIGEST_SIZE: + hash_mode =3D DTHE_HASH_SHA512; + break; + case SHA384_DIGEST_SIZE: + hash_mode =3D DTHE_HASH_SHA384; + break; + case SHA256_DIGEST_SIZE: + hash_mode =3D DTHE_HASH_SHA256; + break; + case SHA224_DIGEST_SIZE: + hash_mode =3D DTHE_HASH_SHA224; + break; + default: + hash_mode =3D DTHE_HASH_ERR; + break; + } + + return hash_mode; +} + +static unsigned int dthe_hash_get_phash_size(struct dthe_tfm_ctx *ctx) +{ + unsigned int phash_size =3D 0; + + switch (ctx->hash_mode) { + case DTHE_HASH_SHA512: + case DTHE_HASH_SHA384: + phash_size =3D SHA512_DIGEST_SIZE; + break; + case DTHE_HASH_SHA256: + case DTHE_HASH_SHA224: + phash_size =3D SHA256_DIGEST_SIZE; + break; + default: + break; + } + + return phash_size; +} + +static int dthe_hash_init_tfm(struct crypto_ahash *tfm) +{ + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + struct dthe_data *dev_data =3D dthe_get_dev(ctx); + + if (!dev_data) + return -ENODEV; + + ctx->dev_data =3D dev_data; + + ctx->hash_mode =3D dthe_hash_get_hash_mode(tfm); + if (ctx->hash_mode =3D=3D DTHE_HASH_ERR) { + dthe_put_dev(ctx); + return -EINVAL; + } + + ctx->phash_size =3D dthe_hash_get_phash_size(ctx); + + return 0; +} + +static void dthe_hash_exit_tfm(struct crypto_ahash *tfm) +{ + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + + dthe_put_dev(ctx); +} + +static int dthe_hash_config_dma_chan(struct dma_chan *chan, struct crypto_= ahash *tfm) +{ + struct dma_slave_config cfg; + int bs =3D crypto_ahash_blocksize(tfm); + + memzero_explicit(&cfg, sizeof(cfg)); + + cfg.dst_addr_width =3D DMA_SLAVE_BUSWIDTH_4_BYTES; + cfg.dst_maxburst =3D bs / 4; + + return dmaengine_slave_config(chan, &cfg); +} + +static void dthe_hash_dma_in_callback(void *data) +{ + struct ahash_request *req =3D (struct ahash_request *)data; + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + + complete(&rctx->hash_compl); +} + +static int dthe_hash_dma_start(struct ahash_request *req, struct scatterli= st *src, + int src_nents, size_t len) +{ + struct crypto_ahash *tfm =3D crypto_ahash_reqtfm(req); + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + struct dthe_data *dev_data =3D dthe_get_dev(ctx); + struct device *tx_dev; + struct dma_async_tx_descriptor *desc_out; + int mapped_nents; + enum dma_data_direction src_dir =3D DMA_TO_DEVICE; + u32 hash_mode; + int ds =3D crypto_ahash_digestsize(tfm); + int ret =3D 0; + u32 *dst; + u32 dst_len; + u32 _status; + void __iomem *sha_base_reg =3D dev_data->regs + DTHE_P_HASH_BASE; + + u32 hash_sysconfig_val =3D DTHE_HASH_SYSCONFIG_INT_EN | DTHE_HASH_SYSCONF= IG_DMA_EN; + u32 hash_irqenable_val =3D DTHE_HASH_IRQENABLE_EN_ALL; + + writel_relaxed(hash_sysconfig_val, sha_base_reg + DTHE_P_HASH_SYSCONFIG); + writel_relaxed(hash_irqenable_val, sha_base_reg + DTHE_P_HASH_IRQENABLE); + + /* Config SHA DMA channel as per SHA mode */ + ret =3D dthe_hash_config_dma_chan(dev_data->dma_sha_tx, tfm); + if (ret) { + dev_err(dev_data->dev, "Can't configure sha_tx dmaengine slave: %d\n", r= et); + goto hash_err; + } + + tx_dev =3D dmaengine_get_dma_device(dev_data->dma_sha_tx); + if (!tx_dev) { + ret =3D -ENODEV; + goto hash_err; + } + + mapped_nents =3D dma_map_sg(tx_dev, src, src_nents, src_dir); + if (mapped_nents =3D=3D 0) { + ret =3D -EINVAL; + goto hash_err; + } + + desc_out =3D dmaengine_prep_slave_sg(dev_data->dma_sha_tx, src, mapped_ne= nts, + DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!desc_out) { + dev_err(dev_data->dev, "OUT prep_slave_sg() failed\n"); + ret =3D -EINVAL; + goto hash_prep_err; + } + + desc_out->callback =3D dthe_hash_dma_in_callback; + desc_out->callback_param =3D req; + + init_completion(&rctx->hash_compl); + + hash_mode =3D ctx->hash_mode; + + if (dthe_hash_flag_is_op(rctx, DTHE_HASH_OP_FINUP)) + hash_mode |=3D DTHE_HASH_MODE_CLOSE_HASH; + + if (dthe_hash_has_flag(rctx, DTHE_HASH_FLAG_PHASH_AVAIL)) { + for (int i =3D 0; i < ctx->phash_size / sizeof(u32); ++i) + writel_relaxed(rctx->phash[i], + sha_base_reg + + DTHE_P_HASH512_IDIGEST_A + + (DTHE_REG_SIZE * i)); + + writel_relaxed(rctx->digestcnt[0], + sha_base_reg + DTHE_P_HASH512_DIGEST_COUNT); + } else { + hash_mode |=3D DTHE_HASH_MODE_USE_ALG_CONST; + } + + writel_relaxed(hash_mode, sha_base_reg + DTHE_P_HASH512_MODE); + writel_relaxed(len, sha_base_reg + DTHE_P_HASH512_LENGTH); + + dmaengine_submit(desc_out); + + dma_async_issue_pending(dev_data->dma_sha_tx); + + ret =3D wait_for_completion_timeout(&rctx->hash_compl, + msecs_to_jiffies(DTHE_DMA_TIMEOUT_MS)); + if (!ret) { + dmaengine_terminate_sync(dev_data->dma_sha_tx); + ret =3D -ETIMEDOUT; + } else { + ret =3D 0; + } + + /* Poll output ready status register */ + if (!ret) + ret =3D readl_relaxed_poll_timeout(sha_base_reg + DTHE_P_HASH_IRQSTATUS,= _status, + (_status & DTHE_HASH_IRQSTATUS_OP_READY), + 0, DTHE_POLL_TIMEOUT_INTERVAL); + + /** + * We need to read the output registers even in case of failure (ret !=3D= 0) to clear + * them properly for future operations. But the function returning a non-= zero value + * should indicate that something went wrong and the result value should = not be used. + */ + if (dthe_hash_flag_is_op(rctx, DTHE_HASH_OP_UPDATE)) { + /* If coming from update, we need to read the phash and store it for fut= ure */ + dst =3D rctx->phash; + dst_len =3D ctx->phash_size / sizeof(u32); + } else { + /* If coming from finup or final, we need to read the final digest */ + dst =3D (u32 *)req->result; + dst_len =3D ds / sizeof(u32); + } + + for (int i =3D 0; i < dst_len; ++i) + put_unaligned(readl_relaxed(sha_base_reg + + DTHE_P_HASH512_IDIGEST_A + + (DTHE_REG_SIZE * i)), + &dst[i]); + + rctx->digestcnt[0] =3D readl_relaxed(sha_base_reg + DTHE_P_HASH512_DIGEST= _COUNT); + dthe_hash_flag_set(rctx, DTHE_HASH_FLAG_PHASH_AVAIL); + +hash_prep_err: + dma_unmap_sg(tx_dev, src, src_nents, src_dir); +hash_err: + return ret; +} + +static int dthe_hash_run(struct crypto_engine *engine, void *areq) +{ + struct ahash_request *req =3D container_of(areq, struct ahash_request, ba= se); + struct crypto_ahash *tfm =3D crypto_ahash_reqtfm(req); + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + + struct scatterlist *src, *sg; + int src_nents =3D 0; + unsigned int bs =3D crypto_ahash_blocksize(tfm); + unsigned int tot_len =3D req->nbytes; + unsigned int len_to_process; + unsigned int len_to_buffer; + unsigned int len_to_send; + unsigned int pad_len =3D 0; + bool is_data_held =3D dthe_hash_has_flag(rctx, DTHE_HASH_FLAG_IS_DATA_HEL= D); + u8 *pad_buf =3D rctx->padding; + int ret =3D 0; + + if (dthe_hash_flag_is_op(rctx, DTHE_HASH_OP_UPDATE)) { + len_to_process =3D tot_len - (tot_len % bs); + len_to_buffer =3D tot_len % bs; + + if (len_to_process =3D=3D 0) { + ret =3D len_to_buffer; + goto hash_buf_all; + } + + /* + * Additionally hold back a trailing block in req ctx, so + * that hardware has data to do CLOSE_HASH in finup. + * Consume any block held from a previous round first. + */ + len_to_process -=3D bs; + len_to_send =3D len_to_process + (is_data_held ? bs : 0); + + if (len_to_send =3D=3D 0) { + memcpy_from_sglist(rctx->data, req->src, 0, bs); + dthe_hash_flag_set(rctx, DTHE_HASH_FLAG_IS_DATA_HELD); + ret =3D len_to_buffer; + goto hash_buf_all; + } + } else { + len_to_process =3D tot_len; + len_to_send =3D len_to_process + (is_data_held ? bs : 0); + len_to_buffer =3D 0; + } + + src_nents =3D sg_nents_for_len(req->src, len_to_process); + if (is_data_held) + src_nents++; + + /* + * Certain DMA restrictions forced us to send data in multiples of BLOCK_= SIZE + * bytes. So, add a padding 0s at the end of src scatterlist if data is n= ot a + * multiple of block_size bytes (Can only happen in final or finup). The = extra + * data is ignored by the DTHE hardware. + */ + if (len_to_send % bs) { + pad_len =3D bs - (len_to_send % bs); + src_nents++; + } + + src =3D kcalloc(src_nents, sizeof(*src), GFP_KERNEL); + if (!src) { + ret =3D -ENOMEM; + goto hash_buf_all; + } + + sg_init_table(src, src_nents); + sg =3D src; + if (is_data_held) { + sg_set_buf(sg, rctx->data, bs); + sg =3D sg_next(sg); + } + sg =3D dthe_copy_sg(sg, req->src, len_to_process); + if (pad_len > 0) { + memset(pad_buf, 0, pad_len); + sg_set_buf(sg, pad_buf, pad_len); + } + + ret =3D dthe_hash_dma_start(req, src, src_nents, len_to_send); + if (!ret) { + if (dthe_hash_flag_is_op(rctx, DTHE_HASH_OP_UPDATE)) { + memcpy_from_sglist(rctx->data, req->src, len_to_process, bs); + dthe_hash_flag_set(rctx, DTHE_HASH_FLAG_IS_DATA_HELD); + } + ret =3D len_to_buffer; + } + + kfree(src); + +hash_buf_all: + local_bh_disable(); + crypto_finalize_hash_request(engine, req, ret); + local_bh_enable(); + return 0; +} + +static int dthe_hash_init(struct ahash_request *req) +{ + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + + rctx->flags =3D 0; + rctx->digestcnt[0] =3D 0; + rctx->digestcnt[1] =3D 0; + memzero_explicit(rctx->data, sizeof(rctx->data)); + + return 0; +} + +static int dthe_hash_update(struct ahash_request *req) +{ + struct crypto_ahash *tfm =3D crypto_ahash_reqtfm(req); + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + struct dthe_data *dev_data =3D dthe_get_dev(ctx); + struct crypto_engine *engine =3D dev_data->hash_engine; + + if (req->nbytes =3D=3D 0) + return 0; + + dthe_hash_flag_set_op(rctx, DTHE_HASH_OP_UPDATE); + + return crypto_transfer_hash_request_to_engine(engine, req); +} + +static int dthe_hash_final(struct ahash_request *req) +{ + struct crypto_ahash *tfm =3D crypto_ahash_reqtfm(req); + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + struct dthe_data *dev_data =3D dthe_get_dev(ctx); + struct crypto_engine *engine =3D dev_data->hash_engine; + + /** + * We are always buffering data in update, except when nbytes =3D 0. + * So, either we get the buffered data here (nbytes > 0), or there is + * a full block held back from a previous update (IS_DATA_HELD), or it + * is the case that we got a zero message to begin with. + */ + if (req->nbytes > 0 || dthe_hash_has_flag(rctx, DTHE_HASH_FLAG_IS_DATA_HE= LD)) { + dthe_hash_flag_set_op(rctx, DTHE_HASH_OP_FINUP); + + return crypto_transfer_hash_request_to_engine(engine, req); + } + + dthe_hash_write_zero_message(ctx->hash_mode, req->result); + + return 0; +} + +static int dthe_hash_finup(struct ahash_request *req) +{ + /* With AHASH_ALG_BLOCK_ONLY, final becomes same as finup. */ + return dthe_hash_final(req); +} + +static int dthe_hash_digest(struct ahash_request *req) +{ + dthe_hash_init(req); + return dthe_hash_finup(req); +} + +static const u32 sha224_init_state[SHA256_DIGEST_SIZE / sizeof(u32)] =3D { + SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3, + SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7 +}; + +static const u32 sha256_init_state[SHA256_DIGEST_SIZE / sizeof(u32)] =3D { + SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, + SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7 +}; + +static const u64 sha384_init_state[SHA512_DIGEST_SIZE / sizeof(u64)] =3D { + SHA384_H0, SHA384_H1, SHA384_H2, SHA384_H3, + SHA384_H4, SHA384_H5, SHA384_H6, SHA384_H7 +}; + +static const u64 sha512_init_state[SHA512_DIGEST_SIZE / sizeof(u64)] =3D { + SHA512_H0, SHA512_H1, SHA512_H2, SHA512_H3, + SHA512_H4, SHA512_H5, SHA512_H6, SHA512_H7 +}; + +static const void *dthe_hash_get_init_state(struct dthe_tfm_ctx *ctx) +{ + switch (ctx->hash_mode) { + case DTHE_HASH_SHA224: + return sha224_init_state; + case DTHE_HASH_SHA256: + return sha256_init_state; + case DTHE_HASH_SHA384: + return sha384_init_state; + case DTHE_HASH_SHA512: + return sha512_init_state; + default: + return NULL; + } +} + +static int dthe_hash_export(struct ahash_request *req, void *out) +{ + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + struct crypto_ahash *tfm =3D crypto_ahash_reqtfm(req); + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + unsigned int bs =3D crypto_ahash_blocksize(tfm); + union { + u8 *u8; + u64 *u64; + } p =3D { .u8 =3D out }; + + if (dthe_hash_has_flag(rctx, DTHE_HASH_FLAG_PHASH_AVAIL)) + memcpy(out, rctx->phash, ctx->phash_size); + else + memcpy(out, dthe_hash_get_init_state(ctx), ctx->phash_size); + + p.u8 +=3D ctx->phash_size; + put_unaligned(rctx->digestcnt[0], p.u64++); + if (ctx->phash_size >=3D SHA512_DIGEST_SIZE) + put_unaligned(rctx->digestcnt[1], p.u64++); + + memcpy(p.u8, rctx->data, bs); + p.u8 +=3D bs; + put_unaligned(rctx->flags, p.u8++); + + return 0; +} + +static int dthe_hash_import(struct ahash_request *req, const void *in) +{ + struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); + struct crypto_ahash *tfm =3D crypto_ahash_reqtfm(req); + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + unsigned int bs =3D crypto_ahash_blocksize(tfm); + union { + const u8 *u8; + const u64 *u64; + } p =3D { .u8 =3D in }; + + memcpy(rctx->phash, in, ctx->phash_size); + p.u8 +=3D ctx->phash_size; + rctx->digestcnt[0] =3D get_unaligned(p.u64++); + if (ctx->phash_size >=3D SHA512_DIGEST_SIZE) + rctx->digestcnt[1] =3D get_unaligned(p.u64++); + + memcpy(rctx->data, p.u8, bs); + p.u8 +=3D bs; + rctx->flags =3D get_unaligned(p.u8++); + + return 0; +} + +static struct ahash_engine_alg hash_algs[] =3D { + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.halg =3D { + .digestsize =3D SHA512_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "sha512", + .cra_driver_name =3D "sha512-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_OPTIONAL_KEY | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA512_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.halg =3D { + .digestsize =3D SHA384_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "sha384", + .cra_driver_name =3D "sha384-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_OPTIONAL_KEY | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA384_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.halg =3D { + .digestsize =3D SHA256_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "sha256", + .cra_driver_name =3D "sha256-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_OPTIONAL_KEY | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA256_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.halg =3D { + .digestsize =3D SHA224_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "sha224", + .cra_driver_name =3D "sha224-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_OPTIONAL_KEY | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA224_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, +}; 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charset="utf-8" Add support for HMAC-SHA512/384/256/224 algorithms in the hashing engine driver of the DTHEv2 hardware cryptographic engine. Signed-off-by: T Pratham --- drivers/crypto/ti/Kconfig | 1 + drivers/crypto/ti/dthev2-common.h | 10 +- drivers/crypto/ti/dthev2-hash.c | 310 +++++++++++++++++++++++++++++- 3 files changed, 315 insertions(+), 6 deletions(-) diff --git a/drivers/crypto/ti/Kconfig b/drivers/crypto/ti/Kconfig index 90af2c7cb1c55..200728b919fca 100644 --- a/drivers/crypto/ti/Kconfig +++ b/drivers/crypto/ti/Kconfig @@ -12,6 +12,7 @@ config CRYPTO_DEV_TI_DTHEV2 select CRYPTO_CCM select CRYPTO_SHA256 select CRYPTO_SHA512 + select CRYPTO_HMAC select SG_SPLIT help This enables support for the TI DTHE V2 hw cryptography engine diff --git a/drivers/crypto/ti/dthev2-common.h b/drivers/crypto/ti/dthev2-c= ommon.h index 97ba76340ffad..bfd7c158a30bf 100644 --- a/drivers/crypto/ti/dthev2-common.h +++ b/drivers/crypto/ti/dthev2-common.h @@ -33,9 +33,9 @@ #define DTHE_POLL_TIMEOUT_INTERVAL HZ /* * Size of largest possible key (of all algorithms) to be stored in dthe_t= fm_ctx - * This is currently the keysize of XTS-AES-256 which is 512 bits (64 byte= s) + * This is currently the keysize of HMAC-SHA512 which is 1024 bits (128 by= tes) */ -#define DTHE_MAX_KEYSIZE (AES_MAX_KEY_SIZE * 2) +#define DTHE_MAX_KEYSIZE (SHA512_BLOCK_SIZE) =20 enum dthe_hash_alg_sel { DTHE_HASH_MD5 =3D 0, @@ -98,9 +98,9 @@ struct dthe_list { /** * struct dthe_tfm_ctx - Transform ctx struct containing ctx for all sub-c= omponents of DTHE V2 * @dev_data: Device data struct pointer - * @keylen: AES key length + * @keylen: Key length for algorithms that use a key * @authsize: Authentication size for modes with authentication - * @key: AES key + * @key: Buffer storing the key * @aes_mode: AES mode * @hash_mode: Hashing Engine mode * @phash_size: partial hash size of the hash algorithm selected @@ -140,6 +140,7 @@ struct dthe_aes_req_ctx { * @phash: buffer to store a partial hash from a previous operation * @digestcnt: stores the digest count from a previous operation; currentl= y hardware only provides * a single 32-bit value even for SHA384/512 + * @odigest: buffer to store the outer digest from a previous operation * @padding: padding buffer for handling unaligned data * @data: buffer to store one block of data to defer operations for non-ze= ro final. * @flags: bitfield of flags for internal use. @@ -151,6 +152,7 @@ struct dthe_aes_req_ctx { struct dthe_hash_req_ctx { u32 phash[SHA512_DIGEST_SIZE / sizeof(u32)]; u64 digestcnt[2]; + u32 odigest[SHA512_DIGEST_SIZE / sizeof(u32)]; u8 padding[SHA512_BLOCK_SIZE]; u8 data[SHA512_BLOCK_SIZE]; u8 flags; diff --git a/drivers/crypto/ti/dthev2-hash.c b/drivers/crypto/ti/dthev2-has= h.c index ca0c04d40c769..a1d3b6b17626d 100644 --- a/drivers/crypto/ti/dthev2-hash.c +++ b/drivers/crypto/ti/dthev2-hash.c @@ -8,6 +8,7 @@ =20 #include #include +#include #include #include #include @@ -24,6 +25,7 @@ /* Registers */ =20 #define DTHE_P_HASH_BASE 0x5000 +#define DTHE_P_HASH512_ODIGEST_A 0x0200 #define DTHE_P_HASH512_IDIGEST_A 0x0240 #define DTHE_P_HASH512_DIGEST_COUNT 0x0280 #define DTHE_P_HASH512_MODE 0x0284 @@ -46,6 +48,12 @@ =20 #define DTHE_HASH_MODE_USE_ALG_CONST BIT(3) #define DTHE_HASH_MODE_CLOSE_HASH BIT(4) +#define DTHE_HASH_MODE_HMAC_KEY_PROCESSING BIT(5) +#define DTHE_HASH_MODE_HMAC_OUTER_HASH BIT(7) + +/* Misc */ +#define DTHE_HMAC_SHA512_MAX_KEYSIZE (SHA512_BLOCK_SIZE) +#define DTHE_HMAC_SHA256_MAX_KEYSIZE (SHA256_BLOCK_SIZE) =20 /* rctx flag bitfields */ #define DTHE_HASH_FLAG_OP BIT(0) @@ -102,6 +110,19 @@ static void dthe_hash_write_zero_message(enum dthe_has= h_alg_sel mode, void *dst) } } =20 +static int dthe_hmac_write_zero_message(struct ahash_request *req) +{ + HASH_FBREQ_ON_STACK(fbreq, req); + int ret; + + ahash_request_set_crypt(fbreq, req->src, req->result, + req->nbytes); + + ret =3D crypto_ahash_digest(fbreq); + HASH_REQUEST_ZERO(fbreq); + return ret; +} + static enum dthe_hash_alg_sel dthe_hash_get_hash_mode(struct crypto_ahash = *tfm) { unsigned int ds =3D crypto_ahash_digestsize(tfm); @@ -153,6 +174,17 @@ static unsigned int dthe_hash_get_phash_size(struct dt= he_tfm_ctx *ctx) return phash_size; } =20 +static const char *dthe_hash_get_alg_name(struct dthe_tfm_ctx *ctx) +{ + switch (ctx->hash_mode) { + case DTHE_HASH_SHA224: return "sha224"; + case DTHE_HASH_SHA256: return "sha256"; + case DTHE_HASH_SHA384: return "sha384"; + case DTHE_HASH_SHA512: return "sha512"; + default: return NULL; + } +} + static int dthe_hash_init_tfm(struct crypto_ahash *tfm) { struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); @@ -215,6 +247,7 @@ static int dthe_hash_dma_start(struct ahash_request *re= q, struct scatterlist *sr enum dma_data_direction src_dir =3D DMA_TO_DEVICE; u32 hash_mode; int ds =3D crypto_ahash_digestsize(tfm); + bool is_hmac =3D (ctx->keylen > 0); int ret =3D 0; u32 *dst; u32 dst_len; @@ -261,8 +294,11 @@ static int dthe_hash_dma_start(struct ahash_request *r= eq, struct scatterlist *sr =20 hash_mode =3D ctx->hash_mode; =20 - if (dthe_hash_flag_is_op(rctx, DTHE_HASH_OP_FINUP)) + if (dthe_hash_flag_is_op(rctx, DTHE_HASH_OP_FINUP)) { hash_mode |=3D DTHE_HASH_MODE_CLOSE_HASH; + if (is_hmac) + hash_mode |=3D DTHE_HASH_MODE_HMAC_OUTER_HASH; + } =20 if (dthe_hash_has_flag(rctx, DTHE_HASH_FLAG_PHASH_AVAIL)) { for (int i =3D 0; i < ctx->phash_size / sizeof(u32); ++i) @@ -270,9 +306,28 @@ static int dthe_hash_dma_start(struct ahash_request *r= eq, struct scatterlist *sr sha_base_reg + DTHE_P_HASH512_IDIGEST_A + (DTHE_REG_SIZE * i)); + if (is_hmac) { + for (int i =3D 0; i < ctx->phash_size / sizeof(u32); ++i) + writel_relaxed(rctx->odigest[i], + sha_base_reg + + DTHE_P_HASH512_ODIGEST_A + + (DTHE_REG_SIZE * i)); + } =20 writel_relaxed(rctx->digestcnt[0], sha_base_reg + DTHE_P_HASH512_DIGEST_COUNT); + } else if (is_hmac) { + hash_mode |=3D DTHE_HASH_MODE_HMAC_KEY_PROCESSING; + + for (int i =3D 0; i < (ctx->keylen / 2) / sizeof(u32); ++i) + writel_relaxed(ctx->key[i], sha_base_reg + + DTHE_P_HASH512_ODIGEST_A + + (DTHE_REG_SIZE * i)); + for (int i =3D 0; i < (ctx->keylen / 2) / sizeof(u32); ++i) + writel_relaxed(ctx->key[i + (ctx->keylen / 2) / sizeof(u32)], + sha_base_reg + + DTHE_P_HASH512_IDIGEST_A + + (DTHE_REG_SIZE * i)); } else { hash_mode |=3D DTHE_HASH_MODE_USE_ALG_CONST; } @@ -320,6 +375,13 @@ static int dthe_hash_dma_start(struct ahash_request *r= eq, struct scatterlist *sr (DTHE_REG_SIZE * i)), &dst[i]); =20 + if (is_hmac) { + for (int i =3D 0; i < dst_len; ++i) + rctx->odigest[i] =3D readl_relaxed(sha_base_reg + + DTHE_P_HASH512_ODIGEST_A + + (DTHE_REG_SIZE * i)); + } + rctx->digestcnt[0] =3D readl_relaxed(sha_base_reg + DTHE_P_HASH512_DIGEST= _COUNT); dthe_hash_flag_set(rctx, DTHE_HASH_FLAG_PHASH_AVAIL); =20 @@ -435,6 +497,7 @@ static int dthe_hash_init(struct ahash_request *req) rctx->digestcnt[0] =3D 0; rctx->digestcnt[1] =3D 0; memzero_explicit(rctx->data, sizeof(rctx->data)); + memzero_explicit(rctx->odigest, sizeof(rctx->odigest)); =20 return 0; } @@ -475,6 +538,10 @@ static int dthe_hash_final(struct ahash_request *req) return crypto_transfer_hash_request_to_engine(engine, req); } =20 + if (ctx->keylen > 0) + /* HMAC with zero-length message */ + return dthe_hmac_write_zero_message(req); + dthe_hash_write_zero_message(ctx->hash_mode, req->result); =20 return 0; @@ -528,6 +595,53 @@ static const void *dthe_hash_get_init_state(struct dth= e_tfm_ctx *ctx) } } =20 +/* + * Compute the HMAC inner or outer pad state (the intermediate hash state = after + * processing one block of key XOR pad_byte) and write it to @out. Only the + * first ctx->phash_size bytes are written, which is always the raw hash s= tate + * at the start of the shash export struct. + */ +static int dthe_hmac_compute_pad_state(struct dthe_tfm_ctx *ctx, u8 pad_by= te, + void *out) +{ + const char *alg_name =3D dthe_hash_get_alg_name(ctx); + struct crypto_shash *ktfm; + u8 data[SHA512_BLOCK_SIZE]; + unsigned int ss; + u8 *state; + int ret; + + ktfm =3D crypto_alloc_shash(alg_name, 0, 0); + if (IS_ERR(ktfm)) + return PTR_ERR(ktfm); + + ss =3D crypto_shash_statesize(ktfm); + state =3D kmalloc(ss, GFP_ATOMIC); + if (!state) { + crypto_free_shash(ktfm); + return -ENOMEM; + } + + SHASH_DESC_ON_STACK(desc, ktfm); + + desc->tfm =3D ktfm; + for (int i =3D 0; i < ctx->keylen; i++) + data[i] =3D ((u8 *)ctx->key)[i] ^ pad_byte; + + ret =3D crypto_shash_init(desc) ?: + crypto_shash_update(desc, data, ctx->keylen) ?: + crypto_shash_export(desc, state); + + if (!ret) + memcpy(out, state, ctx->phash_size); + + memzero_explicit(state, ss); + kfree(state); + crypto_free_shash(ktfm); + memzero_explicit(data, sizeof(data)); + return ret; +} + static int dthe_hash_export(struct ahash_request *req, void *out) { struct dthe_hash_req_ctx *rctx =3D ahash_request_ctx(req); @@ -538,9 +652,12 @@ static int dthe_hash_export(struct ahash_request *req,= void *out) u8 *u8; u64 *u64; } p =3D { .u8 =3D out }; + int ret =3D 0; =20 if (dthe_hash_has_flag(rctx, DTHE_HASH_FLAG_PHASH_AVAIL)) memcpy(out, rctx->phash, ctx->phash_size); + else if (ctx->keylen > 0) + ret =3D dthe_hmac_compute_pad_state(ctx, HMAC_IPAD_VALUE, out); else memcpy(out, dthe_hash_get_init_state(ctx), ctx->phash_size); =20 @@ -549,11 +666,16 @@ static int dthe_hash_export(struct ahash_request *req= , void *out) if (ctx->phash_size >=3D SHA512_DIGEST_SIZE) put_unaligned(rctx->digestcnt[1], p.u64++); =20 + if (ctx->keylen > 0) { + memcpy(p.u8, rctx->odigest, ctx->phash_size); + p.u8 +=3D ctx->phash_size; + } + memcpy(p.u8, rctx->data, bs); p.u8 +=3D bs; put_unaligned(rctx->flags, p.u8++); =20 - return 0; + return ret; } =20 static int dthe_hash_import(struct ahash_request *req, const void *in) @@ -573,6 +695,11 @@ static int dthe_hash_import(struct ahash_request *req,= const void *in) if (ctx->phash_size >=3D SHA512_DIGEST_SIZE) rctx->digestcnt[1] =3D get_unaligned(p.u64++); =20 + if (ctx->keylen > 0) { + memcpy(rctx->odigest, p.u8, ctx->phash_size); + p.u8 +=3D ctx->phash_size; + } + memcpy(rctx->data, p.u8, bs); p.u8 +=3D bs; rctx->flags =3D get_unaligned(p.u8++); @@ -580,6 +707,53 @@ static int dthe_hash_import(struct ahash_request *req,= const void *in) return 0; } =20 +static int dthe_hmac_setkey(struct crypto_ahash *tfm, const u8 *key, + unsigned int keylen) +{ + struct dthe_tfm_ctx *ctx =3D crypto_ahash_ctx(tfm); + struct crypto_ahash *fb =3D crypto_ahash_fb(tfm); + const char *hash_alg_name =3D dthe_hash_get_alg_name(ctx); + unsigned int max_keysize; + + memzero_explicit(ctx->key, sizeof(ctx->key)); + + switch (ctx->hash_mode) { + case DTHE_HASH_SHA512: + case DTHE_HASH_SHA384: + max_keysize =3D DTHE_HMAC_SHA512_MAX_KEYSIZE; + break; + case DTHE_HASH_SHA256: + case DTHE_HASH_SHA224: + max_keysize =3D DTHE_HMAC_SHA256_MAX_KEYSIZE; + break; + default: + return -EINVAL; + } + + if (keylen > max_keysize) { + struct crypto_shash *ktfm; + int err; + + ktfm =3D crypto_alloc_shash(hash_alg_name, 0, 0); + if (IS_ERR(ktfm)) + return PTR_ERR(ktfm); + + SHASH_DESC_ON_STACK(desc, ktfm); + + desc->tfm =3D ktfm; + err =3D crypto_shash_digest(desc, key, keylen, (u8 *)ctx->key); + crypto_free_shash(ktfm); + if (err) + return err; + } else { + memcpy(ctx->key, key, keylen); + } + + ctx->keylen =3D max_keysize; + + return crypto_ahash_setkey(fb, key, keylen); +} + static struct ahash_engine_alg hash_algs[] =3D { { .base.init_tfm =3D dthe_hash_init_tfm, @@ -709,6 +883,138 @@ static struct ahash_engine_alg hash_algs[] =3D { }, .op.do_one_request =3D dthe_hash_run, }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.setkey =3D dthe_hmac_setkey, + .base.halg =3D { + .digestsize =3D SHA512_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "hmac(sha512)", + .cra_driver_name =3D "hmac-sha512-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA512_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.setkey =3D dthe_hmac_setkey, + .base.halg =3D { + .digestsize =3D SHA384_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "hmac(sha384)", + .cra_driver_name =3D "hmac-sha384-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA384_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.setkey =3D dthe_hmac_setkey, + .base.halg =3D { + .digestsize =3D SHA256_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "hmac(sha256)", + .cra_driver_name =3D "hmac-sha256-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA256_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, + { + .base.init_tfm =3D dthe_hash_init_tfm, + .base.exit_tfm =3D dthe_hash_exit_tfm, + .base.init =3D dthe_hash_init, + .base.update =3D dthe_hash_update, + .base.final =3D dthe_hash_final, + .base.finup =3D dthe_hash_finup, + .base.digest =3D dthe_hash_digest, + .base.export =3D dthe_hash_export, + .base.import =3D dthe_hash_import, + .base.setkey =3D dthe_hmac_setkey, + .base.halg =3D { + .digestsize =3D SHA224_DIGEST_SIZE, + .statesize =3D sizeof(struct dthe_hash_req_ctx), + .base =3D { + .cra_name =3D "hmac(sha224)", + .cra_driver_name =3D "hmac-sha224-dthev2", + .cra_priority =3D 299, + .cra_flags =3D CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK | + CRYPTO_ALG_KERN_DRIVER_ONLY | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_AHASH_ALG_BLOCK_ONLY | + CRYPTO_AHASH_ALG_NO_EXPORT_CORE, + .cra_blocksize =3D SHA224_BLOCK_SIZE, + .cra_ctxsize =3D sizeof(struct dthe_tfm_ctx), + .cra_reqsize =3D sizeof(struct dthe_hash_req_ctx), + .cra_module =3D THIS_MODULE, + } + }, + .op.do_one_request =3D dthe_hash_run, + }, }; =20 int dthe_register_hash_algs(void) --=20 2.34.1