mirror of https://gitee.com/openkylin/linux.git
147 lines
4.7 KiB
C
147 lines
4.7 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
|
|
/*
|
|
* Shared descriptors for ahash algorithms
|
|
*
|
|
* Copyright 2017-2019 NXP
|
|
*/
|
|
|
|
#include "compat.h"
|
|
#include "desc_constr.h"
|
|
#include "caamhash_desc.h"
|
|
|
|
/**
|
|
* cnstr_shdsc_ahash - ahash shared descriptor
|
|
* @desc: pointer to buffer used for descriptor construction
|
|
* @adata: pointer to authentication transform definitions.
|
|
* A split key is required for SEC Era < 6; the size of the split key
|
|
* is specified in this case.
|
|
* Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224,
|
|
* SHA256, SHA384, SHA512}.
|
|
* @state: algorithm state OP_ALG_AS_{INIT, FINALIZE, INITFINALIZE, UPDATE}
|
|
* @digestsize: algorithm's digest size
|
|
* @ctx_len: size of Context Register
|
|
* @import_ctx: true if previous Context Register needs to be restored
|
|
* must be true for ahash update and final
|
|
* must be false for for ahash first and digest
|
|
* @era: SEC Era
|
|
*/
|
|
void cnstr_shdsc_ahash(u32 * const desc, struct alginfo *adata, u32 state,
|
|
int digestsize, int ctx_len, bool import_ctx, int era)
|
|
{
|
|
u32 op = adata->algtype;
|
|
|
|
init_sh_desc(desc, HDR_SHARE_SERIAL);
|
|
|
|
/* Append key if it has been set; ahash update excluded */
|
|
if (state != OP_ALG_AS_UPDATE && adata->keylen) {
|
|
u32 *skip_key_load;
|
|
|
|
/* Skip key loading if already shared */
|
|
skip_key_load = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
|
|
JUMP_COND_SHRD);
|
|
|
|
if (era < 6)
|
|
append_key_as_imm(desc, adata->key_virt,
|
|
adata->keylen_pad,
|
|
adata->keylen, CLASS_2 |
|
|
KEY_DEST_MDHA_SPLIT | KEY_ENC);
|
|
else
|
|
append_proto_dkp(desc, adata);
|
|
|
|
set_jump_tgt_here(desc, skip_key_load);
|
|
|
|
op |= OP_ALG_AAI_HMAC_PRECOMP;
|
|
}
|
|
|
|
/* If needed, import context from software */
|
|
if (import_ctx)
|
|
append_seq_load(desc, ctx_len, LDST_CLASS_2_CCB |
|
|
LDST_SRCDST_BYTE_CONTEXT);
|
|
|
|
/* Class 2 operation */
|
|
append_operation(desc, op | state | OP_ALG_ENCRYPT);
|
|
|
|
/*
|
|
* Load from buf and/or src and write to req->result or state->context
|
|
* Calculate remaining bytes to read
|
|
*/
|
|
append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
|
|
/* Read remaining bytes */
|
|
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_LAST2 |
|
|
FIFOLD_TYPE_MSG | KEY_VLF);
|
|
/* Store class2 context bytes */
|
|
append_seq_store(desc, digestsize, LDST_CLASS_2_CCB |
|
|
LDST_SRCDST_BYTE_CONTEXT);
|
|
}
|
|
EXPORT_SYMBOL(cnstr_shdsc_ahash);
|
|
|
|
/**
|
|
* cnstr_shdsc_sk_hash - shared descriptor for symmetric key cipher-based
|
|
* hash algorithms
|
|
* @desc: pointer to buffer used for descriptor construction
|
|
* @adata: pointer to authentication transform definitions.
|
|
* @state: algorithm state OP_ALG_AS_{INIT, FINALIZE, INITFINALIZE, UPDATE}
|
|
* @digestsize: algorithm's digest size
|
|
* @ctx_len: size of Context Register
|
|
* @key_dma: I/O Virtual Address of the key
|
|
*/
|
|
void cnstr_shdsc_sk_hash(u32 * const desc, struct alginfo *adata, u32 state,
|
|
int digestsize, int ctx_len, dma_addr_t key_dma)
|
|
{
|
|
u32 *skip_key_load;
|
|
|
|
init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
|
|
|
|
/* Skip loading of key, context if already shared */
|
|
skip_key_load = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
|
|
|
|
if (state == OP_ALG_AS_INIT || state == OP_ALG_AS_INITFINAL) {
|
|
append_key_as_imm(desc, adata->key_virt, adata->keylen,
|
|
adata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
|
|
} else { /* UPDATE, FINALIZE */
|
|
if (is_xcbc_aes(adata->algtype))
|
|
/* Load K1 */
|
|
append_key(desc, adata->key_dma, adata->keylen,
|
|
CLASS_1 | KEY_DEST_CLASS_REG | KEY_ENC);
|
|
else /* CMAC */
|
|
append_key_as_imm(desc, adata->key_virt, adata->keylen,
|
|
adata->keylen, CLASS_1 |
|
|
KEY_DEST_CLASS_REG);
|
|
/* Restore context */
|
|
append_seq_load(desc, ctx_len, LDST_CLASS_1_CCB |
|
|
LDST_SRCDST_BYTE_CONTEXT);
|
|
}
|
|
|
|
set_jump_tgt_here(desc, skip_key_load);
|
|
|
|
/* Class 1 operation */
|
|
append_operation(desc, adata->algtype | state | OP_ALG_ENCRYPT);
|
|
|
|
/*
|
|
* Load from buf and/or src and write to req->result or state->context
|
|
* Calculate remaining bytes to read
|
|
*/
|
|
append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
|
|
|
|
/* Read remaining bytes */
|
|
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_LAST1 |
|
|
FIFOLD_TYPE_MSG | FIFOLDST_VLF);
|
|
|
|
/*
|
|
* Save context:
|
|
* - xcbc: partial hash, keys K2 and K3
|
|
* - cmac: partial hash, constant L = E(K,0)
|
|
*/
|
|
append_seq_store(desc, digestsize, LDST_CLASS_1_CCB |
|
|
LDST_SRCDST_BYTE_CONTEXT);
|
|
if (is_xcbc_aes(adata->algtype) && state == OP_ALG_AS_INIT)
|
|
/* Save K1 */
|
|
append_fifo_store(desc, key_dma, adata->keylen,
|
|
LDST_CLASS_1_CCB | FIFOST_TYPE_KEY_KEK);
|
|
}
|
|
EXPORT_SYMBOL(cnstr_shdsc_sk_hash);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("FSL CAAM ahash descriptors support");
|
|
MODULE_AUTHOR("NXP Semiconductors");
|