Driver added for RSA Modular Exponentiation using Freescale Hardware
Accelerator CAAM. The driver uses UCLASS_MOD_EXP
Signed-off-by: Ruchika Gupta
CC: Simon Glass
---
Changes in v6:
No Changes
Changes in v5:
Reverted mod_exp not to use output length
Changes in v4:
Modified for the changes in op function of rsa class mod_exp
Changes in v3:
Moved to integrate with RSA UCLASS
drivers/crypto/Kconfig| 1 +
drivers/crypto/fsl/Kconfig| 6 +
drivers/crypto/fsl/Makefile | 1 +
drivers/crypto/fsl/fsl_rsa.c | 60 +++
drivers/crypto/fsl/jobdesc.c | 28
drivers/crypto/fsl/jobdesc.h | 5
drivers/crypto/fsl/rsa_caam.h | 28
7 files changed, 129 insertions(+)
create mode 100644 drivers/crypto/fsl/Kconfig
create mode 100644 drivers/crypto/fsl/fsl_rsa.c
create mode 100644 drivers/crypto/fsl/rsa_caam.h
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index e69de29..bd26a2b 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -0,0 +1 @@
+source drivers/crypto/fsl/Kconfig
diff --git a/drivers/crypto/fsl/Kconfig b/drivers/crypto/fsl/Kconfig
new file mode 100644
index 000..86b2f2f
--- /dev/null
+++ b/drivers/crypto/fsl/Kconfig
@@ -0,0 +1,6 @@
+config FSL_CAAM
+ bool "Freescale Crypto Driver Support"
+ help
+ Enables the Freescale's Cryptographic Accelerator and Assurance
+ Module (CAAM), also known as the SEC version 4 (SEC4). The driver uses
+ Job Ring as interface to communicate with CAAM.
diff --git a/drivers/crypto/fsl/Makefile b/drivers/crypto/fsl/Makefile
index cb13d2e..db3c010 100644
--- a/drivers/crypto/fsl/Makefile
+++ b/drivers/crypto/fsl/Makefile
@@ -8,3 +8,4 @@
obj-$(CONFIG_FSL_CAAM) += jr.o fsl_hash.o jobdesc.o error.o
obj-$(CONFIG_CMD_BLOB) += fsl_blob.o
+obj-$(CONFIG_RSA_FREESCALE_EXP) += fsl_rsa.o
diff --git a/drivers/crypto/fsl/fsl_rsa.c b/drivers/crypto/fsl/fsl_rsa.c
new file mode 100644
index 000..cf1c4c1
--- /dev/null
+++ b/drivers/crypto/fsl/fsl_rsa.c
@@ -0,0 +1,60 @@
+/*
+ * (C) Copyright 2014 Freescale Semiconductor, Inc.
+ * Author: Ruchika Gupta
+ *
+ * SPDX-License-Identifier:GPL-2.0+
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include "jobdesc.h"
+#include "desc.h"
+#include "jr.h"
+#include "rsa_caam.h"
+#include
+
+int fsl_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
+ struct key_prop *prop, uint8_t *out)
+{
+ uint32_t keylen;
+ struct pk_in_params pkin;
+ uint32_t desc[MAX_CAAM_DESCSIZE];
+ int ret;
+
+ /* Length in bytes */
+ keylen = prop->num_bits / 8;
+
+ pkin.a = sig;
+ pkin.a_siz = sig_len;
+ pkin.n = prop->modulus;
+ pkin.n_siz = keylen;
+ pkin.e = prop->public_exponent;
+ pkin.e_siz = prop->exp_len;
+
+ inline_cnstr_jobdesc_pkha_rsaexp(desc, &pkin, out, sig_len);
+
+ ret = run_descriptor_jr(desc);
+ if (ret) {
+ debug("%s: RSA failed to verify: %d\n", __func__, ret);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static const struct mod_exp_ops fsl_mod_exp_ops = {
+ .mod_exp= fsl_mod_exp,
+};
+
+U_BOOT_DRIVER(fsl_rsa_mod_exp) = {
+ .name = "fsl_rsa_mod_exp",
+ .id = UCLASS_MOD_EXP,
+ .ops= &fsl_mod_exp_ops,
+};
+
+U_BOOT_DEVICE(fsl_rsa) = {
+ .name = "fsl_rsa_mod_exp",
+};
diff --git a/drivers/crypto/fsl/jobdesc.c b/drivers/crypto/fsl/jobdesc.c
index 1386bae..cc0dced 100644
--- a/drivers/crypto/fsl/jobdesc.c
+++ b/drivers/crypto/fsl/jobdesc.c
@@ -11,6 +11,7 @@
#include
#include "desc_constr.h"
#include "jobdesc.h"
+#include "rsa_caam.h"
#define KEY_BLOB_SIZE 32
#define MAC_SIZE 16
@@ -123,3 +124,30 @@ void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc)
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
OP_ALG_RNG4_SK);
}
+
+/* Change key size to bytes form bits in calling function*/
+void inline_cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
+ struct pk_in_params *pkin, uint8_t *out,
+ uint32_t out_siz)
+{
+ dma_addr_t dma_addr_e, dma_addr_a, dma_addr_n, dma_addr_out;
+
+ dma_addr_e = virt_to_phys((void *)pkin->e);
+ dma_addr_a = virt_to_phys((void *)pkin->a);
+ dma_addr_n = virt_to_phys((void *)pkin->n);
+ dma_addr_out = virt_to_phys((void *)out);
+
+ init_job_desc(desc, 0);
+ append_key(desc, dma_addr_e, pkin->e_siz, KEY_DEST_PKHA_E | CLASS_1);
+
+ append_fifo_load(desc, dma_addr_a,
+pkin->a_siz, LDST_CLASS_1_CCB | FIFOLD_TYPE_PK_A);
+
+ append_fifo_load(desc, dma_addr_n,
+pkin->n_siz, LDST_CLASS_1_CCB | FIFOLD_TYPE_PK_N);
+
+ append_operation(desc, OP_TYPE_PK | OP_ALG_PK | OP_ALG_PKMODE_MOD_
