diff options
Diffstat (limited to 'drivers/crypto/ccp/ccp-ops.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-ops.c | 108 |
1 files changed, 69 insertions, 39 deletions
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c index d09c6c4af4aa..c6e883b296a9 100644 --- a/drivers/crypto/ccp/ccp-ops.c +++ b/drivers/crypto/ccp/ccp-ops.c @@ -611,15 +611,16 @@ static void ccp_get_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset, 1); } -static void ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa, - struct scatterlist *sg, - unsigned int len, unsigned int se_len, - bool sign_extend) +static int ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa, + struct scatterlist *sg, + unsigned int len, unsigned int se_len, + bool sign_extend) { unsigned int nbytes, sg_offset, dm_offset, ksb_len, i; u8 buffer[CCP_REVERSE_BUF_SIZE]; - BUG_ON(se_len > sizeof(buffer)); + if (WARN_ON(se_len > sizeof(buffer))) + return -EINVAL; sg_offset = len; dm_offset = 0; @@ -642,6 +643,8 @@ static void ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa, se_len - ksb_len); } } + + return 0; } static void ccp_reverse_get_dm_area(struct ccp_dm_workarea *wa, @@ -1606,8 +1609,10 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) if (ret) goto e_ksb; - ccp_reverse_set_dm_area(&exp, rsa->exp, rsa->exp_len, CCP_KSB_BYTES, - false); + ret = ccp_reverse_set_dm_area(&exp, rsa->exp, rsa->exp_len, + CCP_KSB_BYTES, false); + if (ret) + goto e_exp; ret = ccp_copy_to_ksb(cmd_q, &exp, op.jobid, op.ksb_key, CCP_PASSTHRU_BYTESWAP_NOOP); if (ret) { @@ -1623,11 +1628,15 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) if (ret) goto e_exp; - ccp_reverse_set_dm_area(&src, rsa->mod, rsa->mod_len, CCP_KSB_BYTES, - false); + ret = ccp_reverse_set_dm_area(&src, rsa->mod, rsa->mod_len, + CCP_KSB_BYTES, false); + if (ret) + goto e_src; src.address += o_len; /* Adjust the address for the copy operation */ - ccp_reverse_set_dm_area(&src, rsa->src, rsa->src_len, CCP_KSB_BYTES, - false); + ret = ccp_reverse_set_dm_area(&src, rsa->src, rsa->src_len, + CCP_KSB_BYTES, false); + if (ret) + goto e_src; src.address -= o_len; /* Reset the address to original value */ /* Prepare the output area for the operation */ @@ -1841,21 +1850,27 @@ static int ccp_run_ecc_mm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) save = src.address; /* Copy the ECC modulus */ - ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; /* Copy the first operand */ - ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_1, - ecc->u.mm.operand_1_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_1, + ecc->u.mm.operand_1_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) { /* Copy the second operand */ - ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_2, - ecc->u.mm.operand_2_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_2, + ecc->u.mm.operand_2_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; } @@ -1960,18 +1975,24 @@ static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) save = src.address; /* Copy the ECC modulus */ - ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; /* Copy the first point X and Y coordinate */ - ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.x, - ecc->u.pm.point_1.x_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.x, + ecc->u.pm.point_1.x_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; - ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.y, - ecc->u.pm.point_1.y_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.y, + ecc->u.pm.point_1.y_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; /* Set the first point Z coordianate to 1 */ @@ -1980,13 +2001,17 @@ static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) { /* Copy the second point X and Y coordinate */ - ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.x, - ecc->u.pm.point_2.x_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.x, + ecc->u.pm.point_2.x_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; - ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.y, - ecc->u.pm.point_2.y_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.y, + ecc->u.pm.point_2.y_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; /* Set the second point Z coordianate to 1 */ @@ -1994,16 +2019,21 @@ static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) src.address += CCP_ECC_OPERAND_SIZE; } else { /* Copy the Domain "a" parameter */ - ccp_reverse_set_dm_area(&src, ecc->u.pm.domain_a, - ecc->u.pm.domain_a_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.domain_a, + ecc->u.pm.domain_a_len, + CCP_ECC_OPERAND_SIZE, false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) { /* Copy the scalar value */ - ccp_reverse_set_dm_area(&src, ecc->u.pm.scalar, - ecc->u.pm.scalar_len, - CCP_ECC_OPERAND_SIZE, false); + ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.scalar, + ecc->u.pm.scalar_len, + CCP_ECC_OPERAND_SIZE, + false); + if (ret) + goto e_src; src.address += CCP_ECC_OPERAND_SIZE; } } |