diff options
| -rw-r--r-- | drivers/crypto/caam/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/crypto/caam/Makefile | 2 | ||||
| -rw-r--r-- | drivers/crypto/caam/caampkc.c | 607 | ||||
| -rw-r--r-- | drivers/crypto/caam/caampkc.h | 70 | ||||
| -rw-r--r-- | drivers/crypto/caam/compat.h | 3 | ||||
| -rw-r--r-- | drivers/crypto/caam/desc.h | 2 | ||||
| -rw-r--r-- | drivers/crypto/caam/desc_constr.h | 7 | ||||
| -rw-r--r-- | drivers/crypto/caam/pdb.h | 51 | ||||
| -rw-r--r-- | drivers/crypto/caam/pkc_desc.c | 36 |
9 files changed, 789 insertions, 1 deletions
diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig index ff54c42e6e51..64bf3024b680 100644 --- a/drivers/crypto/caam/Kconfig +++ b/drivers/crypto/caam/Kconfig @@ -99,6 +99,18 @@ config CRYPTO_DEV_FSL_CAAM_AHASH_API To compile this as a module, choose M here: the module will be called caamhash. +config CRYPTO_DEV_FSL_CAAM_PKC_API + tristate "Register public key cryptography implementations with Crypto API" + depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR + default y + select CRYPTO_RSA + help + Selecting this will allow SEC Public key support for RSA. + Supported cryptographic primitives: encryption, decryption, + signature and verification. + To compile this as a module, choose M here: the module + will be called caam_pkc. + config CRYPTO_DEV_FSL_CAAM_RNG_API tristate "Register caam device for hwrng API" depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR diff --git a/drivers/crypto/caam/Makefile b/drivers/crypto/caam/Makefile index 3904700ef110..08bf5515ae8a 100644 --- a/drivers/crypto/caam/Makefile +++ b/drivers/crypto/caam/Makefile @@ -10,6 +10,8 @@ obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_JR) += caam_jr.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API) += caamrng.o +obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API) += caam_pkc.o caam-objs := ctrl.o caam_jr-objs := jr.o key_gen.o error.o +caam_pkc-y := caampkc.o pkc_desc.o diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c new file mode 100644 index 000000000000..851015e652b8 --- /dev/null +++ b/drivers/crypto/caam/caampkc.c @@ -0,0 +1,607 @@ +/* + * caam - Freescale FSL CAAM support for Public Key Cryptography + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * There is no Shared Descriptor for PKC so that the Job Descriptor must carry + * all the desired key parameters, input and output pointers. + */ +#include "compat.h" +#include "regs.h" +#include "intern.h" +#include "jr.h" +#include "error.h" +#include "desc_constr.h" +#include "sg_sw_sec4.h" +#include "caampkc.h" + +#define DESC_RSA_PUB_LEN (2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb)) +#define DESC_RSA_PRIV_F1_LEN (2 * CAAM_CMD_SZ + \ + sizeof(struct rsa_priv_f1_pdb)) + +static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc, + struct akcipher_request *req) +{ + dma_unmap_sg(dev, req->dst, edesc->dst_nents, DMA_FROM_DEVICE); + dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE); + + if (edesc->sec4_sg_bytes) + dma_unmap_single(dev, edesc->sec4_sg_dma, edesc->sec4_sg_bytes, + DMA_TO_DEVICE); +} + +static void rsa_pub_unmap(struct device *dev, struct rsa_edesc *edesc, + struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct rsa_pub_pdb *pdb = &edesc->pdb.pub; + + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + dma_unmap_single(dev, pdb->e_dma, key->e_sz, DMA_TO_DEVICE); +} + +static void rsa_priv_f1_unmap(struct device *dev, struct rsa_edesc *edesc, + struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1; + + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE); +} + +/* RSA Job Completion handler */ +static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context) +{ + struct akcipher_request *req = context; + struct rsa_edesc *edesc; + + if (err) + caam_jr_strstatus(dev, err); + + edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); + + rsa_pub_unmap(dev, edesc, req); + rsa_io_unmap(dev, edesc, req); + kfree(edesc); + + akcipher_request_complete(req, err); +} + +static void rsa_priv_f1_done(struct device *dev, u32 *desc, u32 err, + void *context) +{ + struct akcipher_request *req = context; + struct rsa_edesc *edesc; + + if (err) + caam_jr_strstatus(dev, err); + + edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); + + rsa_priv_f1_unmap(dev, edesc, req); + rsa_io_unmap(dev, edesc, req); + kfree(edesc); + + akcipher_request_complete(req, err); +} + +static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, + size_t desclen) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct device *dev = ctx->dev; + struct rsa_edesc *edesc; + gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG | + CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC; + int sgc; + int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes; + int src_nents, dst_nents; + + src_nents = sg_nents_for_len(req->src, req->src_len); + dst_nents = sg_nents_for_len(req->dst, req->dst_len); + + if (src_nents > 1) + sec4_sg_len = src_nents; + if (dst_nents > 1) + sec4_sg_len += dst_nents; + + sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry); + + /* allocate space for base edesc, hw desc commands and link tables */ + edesc = kzalloc(sizeof(*edesc) + desclen + sec4_sg_bytes, + GFP_DMA | flags); + if (!edesc) + return ERR_PTR(-ENOMEM); + + sgc = dma_map_sg(dev, req->src, src_nents, DMA_TO_DEVICE); + if (unlikely(!sgc)) { + dev_err(dev, "unable to map source\n"); + goto src_fail; + } + + sgc = dma_map_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE); + if (unlikely(!sgc)) { + dev_err(dev, "unable to map destination\n"); + goto dst_fail; + } + + edesc->sec4_sg = (void *)edesc + sizeof(*edesc) + desclen; + + sec4_sg_index = 0; + if (src_nents > 1) { + sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0); + sec4_sg_index += src_nents; + } + if (dst_nents > 1) + sg_to_sec4_sg_last(req->dst, dst_nents, + edesc->sec4_sg + sec4_sg_index, 0); + + /* Save nents for later use in Job Descriptor */ + edesc->src_nents = src_nents; + edesc->dst_nents = dst_nents; + + if (!sec4_sg_bytes) + return edesc; + + edesc->sec4_sg_dma = dma_map_single(dev, edesc->sec4_sg, + sec4_sg_bytes, DMA_TO_DEVICE); + if (dma_mapping_error(dev, edesc->sec4_sg_dma)) { + dev_err(dev, "unable to map S/G table\n"); + goto sec4_sg_fail; + } + + edesc->sec4_sg_bytes = sec4_sg_bytes; + + return edesc; + +sec4_sg_fail: + dma_unmap_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE); +dst_fail: + dma_unmap_sg(dev, req->src, src_nents, DMA_TO_DEVICE); +src_fail: + kfree(edesc); + return ERR_PTR(-ENOMEM); +} + +static int set_rsa_pub_pdb(struct akcipher_request *req, + struct rsa_edesc *edesc) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *dev = ctx->dev; + struct rsa_pub_pdb *pdb = &edesc->pdb.pub; + int sec4_sg_index = 0; + + pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->n_dma)) { + dev_err(dev, "Unable to map RSA modulus memory\n"); + return -ENOMEM; + } + + pdb->e_dma = dma_map_single(dev, key->e, key->e_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->e_dma)) { + dev_err(dev, "Unable to map RSA public exponent memory\n"); + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + return -ENOMEM; + } + + if (edesc->src_nents > 1) { + pdb->sgf |= RSA_PDB_SGF_F; + pdb->f_dma = edesc->sec4_sg_dma; + sec4_sg_index += edesc->src_nents; + } else { + pdb->f_dma = sg_dma_address(req->src); + } + + if (edesc->dst_nents > 1) { + pdb->sgf |= RSA_PDB_SGF_G; + pdb->g_dma = edesc->sec4_sg_dma + + sec4_sg_index * sizeof(struct sec4_sg_entry); + } else { + pdb->g_dma = sg_dma_address(req->dst); + } + + pdb->sgf |= (key->e_sz << RSA_PDB_E_SHIFT) | key->n_sz; + pdb->f_len = req->src_len; + + return 0; +} + +static int set_rsa_priv_f1_pdb(struct akcipher_request *req, + struct rsa_edesc *edesc) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *dev = ctx->dev; + struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1; + int sec4_sg_index = 0; + + pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->n_dma)) { + dev_err(dev, "Unable to map modulus memory\n"); + return -ENOMEM; + } + + pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->d_dma)) { + dev_err(dev, "Unable to map RSA private exponent memory\n"); + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + return -ENOMEM; + } + + if (edesc->src_nents > 1) { + pdb->sgf |= RSA_PRIV_PDB_SGF_G; + pdb->g_dma = edesc->sec4_sg_dma; + sec4_sg_index += edesc->src_nents; + } else { + pdb->g_dma = sg_dma_address(req->src); + } + + if (edesc->dst_nents > 1) { + pdb->sgf |= RSA_PRIV_PDB_SGF_F; + pdb->f_dma = edesc->sec4_sg_dma + + sec4_sg_index * sizeof(struct sec4_sg_entry); + } else { + pdb->f_dma = sg_dma_address(req->dst); + } + + pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz; + + return 0; +} + +static int caam_rsa_enc(struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *jrdev = ctx->dev; + struct rsa_edesc *edesc; + int ret; + + if (unlikely(!key->n || !key->e)) + return -EINVAL; + + if (req->dst_len < key->n_sz) { + req->dst_len = key->n_sz; + dev_err(jrdev, "Output buffer length less than parameter n\n"); + return -EOVERFLOW; + } + + /* Allocate extended descriptor */ + edesc = rsa_edesc_alloc(req, DESC_RSA_PUB_LEN); + if (IS_ERR(edesc)) + return PTR_ERR(edesc); + + /* Set RSA Encrypt Protocol Data Block */ + ret = set_rsa_pub_pdb(req, edesc); + if (ret) + goto init_fail; + + /* Initialize Job Descriptor */ + init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub); + + ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_pub_done, req); + if (!ret) + return -EINPROGRESS; + + rsa_pub_unmap(jrdev, edesc, req); + +init_fail: + rsa_io_unmap(jrdev, edesc, req); + kfree(edesc); + return ret; +} + +static int caam_rsa_dec(struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *jrdev = ctx->dev; + struct rsa_edesc *edesc; + int ret; + + if (unlikely(!key->n || !key->d)) + return -EINVAL; + + if (req->dst_len < key->n_sz) { + req->dst_len = key->n_sz; + dev_err(jrdev, "Output buffer length less than parameter n\n"); + return -EOVERFLOW; + } + + /* Allocate extended descriptor */ + edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F1_LEN); + if (IS_ERR(edesc)) + return PTR_ERR(edesc); + + /* Set RSA Decrypt Protocol Data Block - Private Key Form #1 */ + ret = set_rsa_priv_f1_pdb(req, edesc); + if (ret) + goto init_fail; + + /* Initialize Job Descriptor */ + init_rsa_priv_f1_desc(edesc->hw_desc, &edesc->pdb.priv_f1); + + ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f1_done, req); + if (!ret) + return -EINPROGRESS; + + rsa_priv_f1_unmap(jrdev, edesc, req); + +init_fail: + rsa_io_unmap(jrdev, edesc, req); + kfree(edesc); + return ret; +} + +static void caam_rsa_free_key(struct caam_rsa_key *key) +{ + kzfree(key->d); + kfree(key->e); + kfree(key->n); + key->d = NULL; + key->e = NULL; + key->n = NULL; + key->d_sz = 0; + key->e_sz = 0; + key->n_sz = 0; +} + +/** + * caam_read_raw_data - Read a raw byte stream as a positive integer. + * The function skips buffer's leading zeros, copies the remained data + * to a buffer allocated in the GFP_DMA | GFP_KERNEL zone and returns + * the address of the new buffer. + * + * @buf : The data to read + * @nbytes: The amount of data to read + */ +static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes) +{ + u8 *val; + + while (!*buf && *nbytes) { + buf++; + (*nbytes)--; + } + + val = kzalloc(*nbytes, GFP_DMA | GFP_KERNEL); + if (!val) + return NULL; + + memcpy(val, buf, *nbytes); + + return val; +} + +static int caam_rsa_check_key_length(unsigned int len) +{ + if (len > 4096) + return -EINVAL; + return 0; +} + +static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key, + unsigned int keylen) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct rsa_key raw_key = {0}; + struct caam_rsa_key *rsa_key = &ctx->key; + int ret; + + /* Free the old RSA key if any */ + caam_rsa_free_key(rsa_key); + + ret = rsa_parse_pub_key(&raw_key, key, keylen); + if (ret) + return ret; + + /* Copy key in DMA zone */ + rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->e) + goto err; + + /* + * Skip leading zeros and copy the positive integer to a buffer + * allocated in the GFP_DMA | GFP_KERNEL zone. The decryption descriptor + * expects a positive integer for the RSA modulus and uses its length as + * decryption output length. + */ + rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz); + if (!rsa_key->n) + goto err; + + if (caam_rsa_check_key_length(raw_key.n_sz << 3)) { + caam_rsa_free_key(rsa_key); + return -EINVAL; + } + + rsa_key->e_sz = raw_key.e_sz; + rsa_key->n_sz = raw_key.n_sz; + + memcpy(rsa_key->e, raw_key.e, raw_key.e_sz); + + return 0; +err: + caam_rsa_free_key(rsa_key); + return -ENOMEM; +} + +static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key, + unsigned int keylen) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct rsa_key raw_key = {0}; + struct caam_rsa_key *rsa_key = &ctx->key; + int ret; + + /* Free the old RSA key if any */ + caam_rsa_free_key(rsa_key); + + ret = rsa_parse_priv_key(&raw_key, key, keylen); + if (ret) + return ret; + + /* Copy key in DMA zone */ + rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->d) + goto err; + + rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->e) + goto err; + + /* + * Skip leading zeros and copy the positive integer to a buffer + * allocated in the GFP_DMA | GFP_KERNEL zone. The decryption descriptor + * expects a positive integer for the RSA modulus and uses its length as + * decryption output length. + */ + rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz); + if (!rsa_key->n) + goto err; + + if (caam_rsa_check_key_length(raw_key.n_sz << 3)) { + caam_rsa_free_key(rsa_key); + return -EINVAL; + } + + rsa_key->d_sz = raw_key.d_sz; + rsa_key->e_sz = raw_key.e_sz; + rsa_key->n_sz = raw_key.n_sz; + + memcpy(rsa_key->d, raw_key.d, raw_key.d_sz); + memcpy(rsa_key->e, raw_key.e, raw_key.e_sz); + + return 0; + +err: + caam_rsa_free_key(rsa_key); + return -ENOMEM; +} + +static int caam_rsa_max_size(struct crypto_akcipher *tfm) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + + return (key->n) ? key->n_sz : -EINVAL; +} + +/* Per session pkc's driver context creation function */ +static int caam_rsa_init_tfm(struct crypto_akcipher *tfm) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + + ctx->dev = caam_jr_alloc(); + + if (IS_ERR(ctx->dev)) { + dev_err(ctx->dev, "Job Ring Device allocation for transform failed\n"); + return PTR_ERR(ctx->dev); + } + + return 0; +} + +/* Per session pkc's driver context cleanup function */ +static void caam_rsa_exit_tfm(struct crypto_akcipher *tfm) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + + caam_rsa_free_key(key); + caam_jr_free(ctx->dev); +} + +static struct akcipher_alg caam_rsa = { + .encrypt = caam_rsa_enc, + .decrypt = caam_rsa_dec, + .sign = caam_rsa_dec, + .verify = caam_rsa_enc, + .set_pub_key = caam_rsa_set_pub_key, + .set_priv_key = caam_rsa_set_priv_key, + .max_size = caam_rsa_max_size, + .init = caam_rsa_init_tfm, + .exit = caam_rsa_exit_tfm, + .base = { + .cra_name = "rsa", + .cra_driver_name = "rsa-caam", + .cra_priority = 3000, + .cra_module = THIS_MODULE, + .cra_ctxsize = sizeof(struct caam_rsa_ctx), + }, +}; + +/* Public Key Cryptography module initialization handler */ +static int __init caam_pkc_init(void) +{ + struct device_node *dev_node; + struct platform_device *pdev; + struct device *ctrldev; + struct caam_drv_private *priv; + u32 cha_inst, pk_inst; + int err; + + dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0"); + if (!dev_node) { + dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec4.0"); + if (!dev_node) + return -ENODEV; + } + + pdev = of_find_device_by_node(dev_node); + if (!pdev) { + of_node_put(dev_node); + return -ENODEV; + } + + ctrldev = &pdev->dev; + priv = dev_get_drvdata(ctrldev); + of_node_put(dev_node); + + /* + * If priv is NULL, it's probably because the caam driver wasn't + * properly initialized (e.g. RNG4 init failed). Thus, bail out here. + */ + if (!priv) + return -ENODEV; + + /* Determine public key hardware accelerator presence. */ + cha_inst = rd_reg32(&priv->ctrl->perfmon.cha_num_ls); + pk_inst = (cha_inst & CHA_ID_LS_PK_MASK) >> CHA_ID_LS_PK_SHIFT; + + /* Do not register algorithms if PKHA is not present. */ + if (!pk_inst) + return -ENODEV; + + err = crypto_register_akcipher(&caam_rsa); + if (err) + dev_warn(ctrldev, "%s alg registration failed\n", + caam_rsa.base.cra_driver_name); + else + dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n"); + + return err; +} + +static void __exit caam_pkc_exit(void) +{ + crypto_unregister_akcipher(&caam_rsa); +} + +module_init(caam_pkc_init); +module_exit(caam_pkc_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("FSL CAAM support for PKC functions of crypto API"); +MODULE_AUTHOR("Freescale Semiconductor"); diff --git a/drivers/crypto/caam/caampkc.h b/drivers/crypto/caam/caampkc.h new file mode 100644 index 000000000000..f595d159b112 --- /dev/null +++ b/drivers/crypto/caam/caampkc.h @@ -0,0 +1,70 @@ +/* + * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * There is no Shared Descriptor for PKC so that the Job Descriptor must carry + * all the desired key parameters, input and output pointers. + */ + +#ifndef _PKC_DESC_H_ +#define _PKC_DESC_H_ +#include "compat.h" +#include "pdb.h" + +/** + * caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone. + * @n : RSA modulus raw byte stream + * @e : RSA public exponent raw byte stream + * @d : RSA private exponent raw byte stream + * @n_sz : length in bytes of RSA modulus n + * @e_sz : length in bytes of RSA public exponent + * @d_sz : length in bytes of RSA private exponent + */ +struct caam_rsa_key { + u8 *n; + u8 *e; + u8 *d; + size_t n_sz; + size_t e_sz; + size_t d_sz; +}; + +/** + * caam_rsa_ctx - per session context. + * @key : RSA key in DMA zone + * @dev : device structure + */ +struct caam_rsa_ctx { + struct caam_rsa_key key; + struct device *dev; +}; + +/** + * rsa_edesc - s/w-extended rsa descriptor + * @src_nents : number of segments in input scatterlist + * @dst_nents : number of segments in output scatterlist + * @sec4_sg_bytes : length of h/w link table + * @sec4_sg_dma : dma address of h/w link table + * @sec4_sg : pointer to h/w link table + * @pdb : specific RSA Protocol Data Block (PDB) + * @hw_desc : descriptor followed by link tables if any + */ +struct rsa_edesc { + int src_nents; + int dst_nents; + int sec4_sg_bytes; + dma_addr_t sec4_sg_dma; + struct sec4_sg_entry *sec4_sg; + union { + struct rsa_pub_pdb pub; + struct rsa_priv_f1_pdb priv_f1; + } pdb; + u32 hw_desc[]; +}; + +/* Descriptor construction primitives. */ +void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb); +void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb); + +#endif diff --git a/drivers/crypto/caam/compat.h b/drivers/crypto/caam/compat.h index b6955ecdfb3f..7149cd2492e0 100644 --- a/drivers/crypto/caam/compat.h +++ b/drivers/crypto/caam/compat.h @@ -35,8 +35,11 @@ #include <crypto/md5.h> #include <crypto/internal/aead.h> #include <crypto/authenc.h> +#include <crypto/akcipher.h> #include <crypto/scatterwalk.h> #include <crypto/internal/skcipher.h> #include <crypto/internal/hash.h> +#include <crypto/internal/rsa.h> +#include <crypto/internal/akcipher.h> #endif /* !defined(CAAM_COMPAT_H) */ diff --git a/drivers/crypto/caam/desc.h b/drivers/crypto/caam/desc.h index d8d5584b600b..26427c11ad87 100644 --- a/drivers/crypto/caam/desc.h +++ b/drivers/crypto/caam/desc.h @@ -453,6 +453,8 @@ struct sec4_sg_entry { #define OP_PCLID_PUBLICKEYPAIR (0x14 << OP_PCLID_SHIFT) #define OP_PCLID_DSASIGN (0x15 << OP_PCLID_SHIFT) #define OP_PCLID_DSAVERIFY (0x16 << OP_PCLID_SHIFT) +#define OP_PCLID_RSAENC_PUBKEY (0x18 << OP_PCLID_SHIFT) +#define OP_PCLID_RSADEC_PRVKEY (0x19 << OP_PCLID_SHIFT) /* Assuming OP_TYPE = OP_TYPE_DECAP_PROTOCOL/ENCAP_PROTOCOL */ #define OP_PCLID_IPSEC (0x01 << OP_PCLID_SHIFT) diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h index ae3aef6e9fee..d3869b95e7b1 100644 --- a/drivers/crypto/caam/desc_constr.h +++ b/drivers/crypto/caam/desc_constr.h @@ -77,6 +77,13 @@ static inline void init_job_desc(u32 *desc, u32 options) init_desc(desc, CMD_DESC_HDR | options); } +static inline void init_job_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes) +{ + u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; + + init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options); +} + static inline void append_ptr(u32 *desc, dma_addr_t ptr) { dma_addr_t *offset = (dma_addr_t *)desc_end(desc); diff --git a/drivers/crypto/caam/pdb.h b/drivers/crypto/caam/pdb.h index d383573d3dd4..aaa00dd1c601 100644 --- a/drivers/crypto/caam/pdb.h +++ b/drivers/crypto/caam/pdb.h @@ -1,12 +1,13 @@ /* * CAAM Protocol Data Block (PDB) definition header file * - * Copyright 2008-2012 Freescale Semiconductor, Inc. + * Copyright 2008-2016 Freescale Semiconductor, Inc. * */ #ifndef CAAM_PDB_H #define CAAM_PDB_H +#include "compat.h" /* * PDB- IPSec ESP Header Modification Options @@ -476,4 +477,52 @@ struct dsa_verify_pdb { u8 *ab; /* only used if ECC processing */ }; +/* RSA Protocol Data Block */ +#define RSA_PDB_SGF_SHIFT 28 +#define RSA_PDB_E_SHIFT 12 +#define RSA_PDB_E_MASK (0xFFF << RSA_PDB_E_SHIFT) +#define RSA_PDB_D_SHIFT 12 +#define RSA_PDB_D_MASK (0xFFF << RSA_PDB_D_SHIFT) + +#define RSA_PDB_SGF_F (0x8 << RSA_PDB_SGF_SHIFT) +#define RSA_PDB_SGF_G (0x4 << RSA_PDB_SGF_SHIFT) +#define RSA_PRIV_PDB_SGF_F (0x4 << RSA_PDB_SGF_SHIFT) +#define RSA_PRIV_PDB_SGF_G (0x8 << RSA_PDB_SGF_SHIFT) + +#define RSA_PRIV_KEY_FRM_1 0 + +/** + * RSA Encrypt Protocol Data Block + * @sgf: scatter-gather field + * @f_dma: dma address of input data + * @g_dma: dma address of encrypted output data + * @n_dma: dma address of RSA modulus + * @e_dma: dma address of RSA public exponent + * @f_len: length in octets of the input data + */ +struct rsa_pub_pdb { + u32 sgf; + dma_addr_t f_dma; + dma_addr_t g_dma; + dma_addr_t n_dma; + dma_addr_t e_dma; + u32 f_len; +} __packed; + +/** + * RSA Decrypt PDB - Private Key Form #1 + * @sgf: scatter-gather field + * @g_dma: dma address of encrypted input data + * @f_dma: dma address of output data + * @n_dma: dma address of RSA modulus + * @d_dma: dma address of RSA private exponent + */ +struct rsa_priv_f1_pdb { + u32 sgf; + dma_addr_t g_dma; + dma_addr_t f_dma; + dma_addr_t n_dma; + dma_addr_t d_dma; +} __packed; + #endif diff --git a/drivers/crypto/caam/pkc_desc.c b/drivers/crypto/caam/pkc_desc.c new file mode 100644 index 000000000000..4e4183e615ea --- /dev/null +++ b/drivers/crypto/caam/pkc_desc.c @@ -0,0 +1,36 @@ +/* + * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * There is no Shared Descriptor for PKC so that the Job Descriptor must carry + * all the desired key parameters, input and output pointers. + */ +#include "caampkc.h" +#include "desc_constr.h" + +/* Descriptor for RSA Public operation */ +void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb) +{ + init_job_desc_pdb(desc, 0, sizeof(*pdb)); + append_cmd(desc, pdb->sgf); + append_ptr(desc, pdb->f_dma); + append_ptr(desc, pdb->g_dma); + append_ptr(desc, pdb->n_dma); + append_ptr(desc, pdb->e_dma); + append_cmd(desc, pdb->f_len); + append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSAENC_PUBKEY); +} + +/* Descriptor for RSA Private operation - Private Key Form #1 */ +void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb) +{ + init_job_desc_pdb(desc, 0, sizeof(*pdb)); + append_cmd(desc, pdb->sgf); + append_ptr(desc, pdb->g_dma); + append_ptr(desc, pdb->f_dma); + append_ptr(desc, pdb->n_dma); + append_ptr(desc, pdb->d_dma); + append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSADEC_PRVKEY | + RSA_PRIV_KEY_FRM_1); +} |