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[dice,ctw] Add more cbor wrappers for auto-gen cwt template
The autogen source from templates needs some more APIs to utilize the Cbor structure, including - calculate the size of a given cbor argument - add a bstr/tstr header with size, and rewind the cursor - copy the war data from input pointer to the CborOut buffer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| // Copyright lowRISC contributors (OpenTitan project). | ||
| // Licensed under the Apache License, Version 2.0, see LICENSE for details. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| #include "sw/device/silicon_creator/lib/cert/cbor.h" | ||
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| #include <string.h> | ||
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| #include "include/dice/cbor_writer.h" | ||
| #include "sw/device/lib/base/macros.h" | ||
| #include "sw/device/lib/runtime/log.h" | ||
| #include "sw/device/silicon_creator/lib/error.h" | ||
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| #define CBOR_RETURN_IF_OVERFLOWED(p) \ | ||
| do { \ | ||
| if (CborOutOverflowed(p)) { \ | ||
| LOG_ERROR("CborOutOverflowed!!"); \ | ||
| return kErrorCertInvalidSize; \ | ||
| } \ | ||
| } while (0) | ||
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| #define CBOR_CHECK_OVERFLOWED_AND_RETURN(p) \ | ||
| do { \ | ||
| CBOR_RETURN_IF_OVERFLOWED(p); \ | ||
| return kErrorOk; \ | ||
| } while (0) | ||
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| inline rom_error_t cbor_write_out_init(struct CborOut *p, void *buf, | ||
| const size_t buf_size) { | ||
| CborOutInit(buf, buf_size, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_map_init(struct CborOut *p, const size_t num_pairs) { | ||
| CborWriteMap(num_pairs, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_array_init(struct CborOut *p, | ||
| const size_t num_elements) { | ||
| CborWriteArray(num_elements, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_string(struct CborOut *p, const char *str) { | ||
| CborWriteTstr(str, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_bytes(struct CborOut *p, const uint8_t *data, | ||
| const size_t data_size) { | ||
| CborWriteBstr(data_size, data, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| // Wrappers to encode a pair of data for cbor-map | ||
| inline rom_error_t cbor_write_pair_uint_uint(struct CborOut *p, uint64_t key, | ||
| uint64_t value) { | ||
| CborWriteUint(key, p); | ||
| CborWriteUint(value, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_pair_int_uint(struct CborOut *p, int64_t key, | ||
| uint64_t value) { | ||
| CborWriteInt(key, p); | ||
| CborWriteUint(value, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_pair_uint_int(struct CborOut *p, uint64_t key, | ||
| int64_t value) { | ||
| CborWriteUint(key, p); | ||
| CborWriteInt(value, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_pair_int_bytes(struct CborOut *p, int64_t key, | ||
| const uint8_t *value, | ||
| const size_t value_size) { | ||
| CborWriteInt(key, p); | ||
| CborWriteBstr(value_size, value, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_pair_uint_tstr(struct CborOut *p, uint64_t key, | ||
| const char *value) { | ||
| CborWriteUint(key, p); | ||
| CborWriteTstr(value, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| inline rom_error_t cbor_write_pair_int_tstr(struct CborOut *p, int64_t key, | ||
| const char *value) { | ||
| CborWriteInt(key, p); | ||
| CborWriteTstr(value, p); | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| // Helpers for the auto-gen template, to | ||
| // - calculate the size of a given cbor argument | ||
| // - add a bstr/tstr header with size, and rewind the cursor | ||
| // - copy the war data from input pointer to the CborOut buffer | ||
| size_t cbor_calc_arg_size(uint64_t value) { | ||
| if (value <= 23) { | ||
| return 0; | ||
| } else if (value <= 0xff) { | ||
| return 1; | ||
| } else if (value <= 0xffff) { | ||
| return 2; | ||
| } else if (value <= 0xffffffff) { | ||
| return 4; | ||
| } else { | ||
| return 8; | ||
| }; | ||
| } | ||
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| size_t cbor_calc_int_size(int64_t value) { | ||
| if (value < 0) | ||
| return cbor_calc_arg_size((uint64_t)(-(value + 1))); | ||
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| return cbor_calc_arg_size((uint64_t)value); | ||
| } | ||
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| rom_error_t cbor_write_bstr_header(struct CborOut *p, const size_t bstr_size) { | ||
| if (NULL == CborAllocBstr(bstr_size, p)) | ||
| return kErrorCertInvalidSize; | ||
| p->cursor -= bstr_size; | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| rom_error_t cbor_write_tstr_header(struct CborOut *p, const size_t tstr_size) { | ||
| if (NULL == CborAllocTstr(tstr_size, p)) | ||
| return kErrorCertInvalidSize; | ||
| p->cursor -= tstr_size; | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } | ||
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| rom_error_t cbor_write_raw_bytes(struct CborOut *p, const uint8_t *raw, | ||
| const size_t raw_size) { | ||
| if (p->cursor + raw_size > p->buffer_size) | ||
| return kErrorCertInvalidSize; | ||
| memcpy(&p->buffer[p->cursor], raw, raw_size); | ||
| p->cursor += raw_size; | ||
| CBOR_CHECK_OVERFLOWED_AND_RETURN(p); | ||
| } |
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