47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
#include "security/rp2.h"
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#include "security/rp3.h"
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#include "security/rp-util.h"
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#include "security/util.h"
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#include "util/crc.h"
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#include "util/crypto.h"
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#include "util/log.h"
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void security_rp3_generate_signed_eeprom_data(
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enum security_rp_util_rp_type type,
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const struct security_rp_sign_key *sign_key,
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const struct security_mcode *plug_mcode,
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const struct security_id *plug_id,
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struct security_rp3_eeprom *out)
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{
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uint8_t sign_key_tmp[8];
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uint8_t plug_id_reversed[8];
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log_assert(sign_key);
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log_assert(plug_mcode);
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log_assert(plug_id);
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log_assert(out);
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memcpy(sign_key_tmp, sign_key, sizeof(sign_key_tmp));
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if (type == SECURITY_RP_UTIL_RP_TYPE_BLACK) {
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for (int i = 0; i < sizeof(sign_key_tmp); i++) {
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sign_key_tmp[i] ^= ((const uint8_t *) plug_mcode)[i];
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}
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}
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security_util_8_to_6_encode(sign_key_tmp, sign_key_tmp);
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for (int i = 0; i < sizeof(plug_id_reversed); i++) {
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plug_id_reversed[i] = plug_id->id[7 - i];
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}
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security_util_8_to_6_encode(
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(const uint8_t *) plug_mcode, out->packed_payload);
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memset(out->zeros, 0, sizeof(out->zeros));
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security_rp2_create_signature(
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plug_id_reversed, sign_key_tmp, out->signature);
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out->crc = crc8((uint8_t *) out, sizeof(*out) - 1, 0);
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}
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