diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/crypto/caam/caamhash_desc.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/crypto/caam/caamhash_desc.c')
-rw-r--r-- | drivers/crypto/caam/caamhash_desc.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/crypto/caam/caamhash_desc.c b/drivers/crypto/caam/caamhash_desc.c new file mode 100644 index 000000000..619564509 --- /dev/null +++ b/drivers/crypto/caam/caamhash_desc.c @@ -0,0 +1,145 @@ +// 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 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 + */ +void cnstr_shdsc_sk_hash(u32 * const desc, struct alginfo *adata, u32 state, + int digestsize, int ctx_len) +{ + 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, adata->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"); |