plat/intel/soc/common/include/socfpga_vab.h

/*
 * Copyright (c) 2020-2023, Intel Corporation. All rights reserved.
 * Copyright (c) 2024, Altera Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef SOCFPGA_VAB_H
#define SOCFPGA_VAB_H


#include <stdlib.h>
#include "socfpga_fcs.h"


/* Macros */
#define IS_BYTE_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)
#define BYTE_ALIGN(x, a)		__ALIGN_MASK((x), (typeof(x))(a)-1)
#define __ALIGN_MASK(x, mask)		(((x)+(mask))&~(mask))
#define VAB_CERT_HEADER_SIZE		sizeof(struct fcs_hps_vab_certificate_header)
#define VAB_CERT_MAGIC_OFFSET		offsetof(struct fcs_hps_vab_certificate_header, d)
#define VAB_CERT_FIT_SHA384_OFFSET	offsetof(struct fcs_hps_vab_certificate_data, fcs_sha384[0])
#define SDM_CERT_MAGIC_NUM		0x25D04E7F
#define CHUNKSZ_PER_WD_RESET		(256 * 1024)
#define SHA384_SUM_LEN		48
#define SHA384_DER_LEN		19
#define SHA512_SUM_LEN		64
#define SHA512_DER_LEN		19
#define SHA512_BLOCK_SIZE		128
#define e0(x)		(ror64(x, 28) ^ ror64(x, 34) ^ ror64(x, 39))
#define e1(x)		(ror64(x, 14) ^ ror64(x, 18) ^ ror64(x, 41))
#define s0(x)		(ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
#define s1(x)		(ror64(x, 19) ^ ror64(x, 61) ^ (x >> 6))

#define __cpu_to_le64(x)	((__force __le64)(__u64)(x))

#define PUT_UINT64_BE(n, b, i) {	\
	(b)[(i)] = (unsigned char) ((n) >> 56);	\
	(b)[(i) + 1] = (unsigned char) ((n) >> 48);	\
	(b)[(i) + 2] = (unsigned char) ((n) >> 40);	\
	(b)[(i) + 3] = (unsigned char) ((n) >> 32);	\
	(b)[(i) + 4] = (unsigned char) ((n) >> 24);	\
	(b)[(i) + 5] = (unsigned char) ((n) >> 16);	\
	(b)[(i) + 6] = (unsigned char) ((n) >>  8);	\
	(b)[(i) + 7] = (unsigned char) ((n));	\
}

/* SHA related return Macro */
#define ENOVABCERT		1 /* VAB certificate not available */
#define EIMGERR		2 /* Image format/size not valid */
#define ETIMEOUT		3 /* Execution timeout */
#define EPROCESS		4 /* Process error */
#define EKEYREJECTED		5/* Key was rejected by service */

/* SHA384 certificate ID */
#define SHA384_H0	0xcbbb9d5dc1059ed8ULL
#define SHA384_H1	0x629a292a367cd507ULL
#define SHA384_H2	0x9159015a3070dd17ULL
#define SHA384_H3	0x152fecd8f70e5939ULL
#define SHA384_H4	0x67332667ffc00b31ULL
#define SHA384_H5	0x8eb44a8768581511ULL
#define SHA384_H6	0xdb0c2e0d64f98fa7ULL
#define SHA384_H7	0x47b5481dbefa4fa4ULL

#define GET_UINT64_BE(n, b, i) {	\
	(n) = ((unsigned long long) (b)[(i)] << 56)	\
	    | ((unsigned long long) (b)[(i) + 1] << 48)	\
	    | ((unsigned long long) (b)[(i) + 2] << 40)	\
	    | ((unsigned long long) (b)[(i) + 3] << 32)	\
	    | ((unsigned long long) (b)[(i) + 4] << 24)	\
	    | ((unsigned long long) (b)[(i) + 5] << 16)	\
	    | ((unsigned long long) (b)[(i) + 6] <<  8)	\
	    | ((unsigned long long) (b)[(i) + 7]);	\
}

static const uint64_t sha512_K[80] = {
	0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
	0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
	0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
	0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
	0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
	0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
	0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
	0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
	0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
	0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
	0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
	0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
	0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
	0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
	0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
	0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
	0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
	0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
	0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
	0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
	0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
	0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
	0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
	0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
	0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
	0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
	0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
};

static inline uint64_t ror64(uint64_t word, unsigned int shift)
{
	return (word >> (shift & 63)) | (word << ((-shift) & 63));
}

struct fcs_hps_vab_certificate_data {
	uint32_t vab_cert_magic_num;			/* offset 0x10 */
	uint32_t flags;
	uint8_t rsvd0_1[8];
	uint8_t fcs_sha384[FCS_SHA384_WORD_SIZE];	/* offset 0x20 */
};

struct fcs_hps_vab_certificate_header {
	uint32_t cert_magic_num;			/* offset 0 */
	uint32_t cert_data_sz;
	uint32_t cert_ver;
	uint32_t cert_type;
	struct fcs_hps_vab_certificate_data d;		/* offset 0x10 */
	/* keychain starts at offset 0x50 */
};

typedef struct {
	uint64_t state[SHA512_SUM_LEN / 8];
	uint64_t count[2];
	uint8_t buf[SHA512_BLOCK_SIZE];
} sha512_context;

static inline uint64_t Ch(uint64_t x, uint64_t y, uint64_t z)
{
	return z ^ (x & (y ^ z));
}

static inline uint64_t Maj(uint64_t x, uint64_t y, uint64_t z)
{
	return (x & y) | (z & (x | y));
}

static inline void LOAD_OP(int I, uint64_t *W, const uint8_t *input)
{
	GET_UINT64_BE(W[I], input, I*8);
}

static inline void BLEND_OP(int I, uint64_t *W)
{
	W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
}


/* Function Definitions */
static size_t get_img_size(uint8_t *img_buf, size_t img_buf_sz);
int socfpga_vendor_authentication(void **p_image, size_t *p_size);
static uint32_t get_unaligned_le32(const void *p);
void sha384_csum_wd(const unsigned char *input, unsigned int ilen,
unsigned char *output, unsigned int chunk_sz);

#endif