831 lines
22 KiB
C
831 lines
22 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cbor.h"
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#include "ctap.h"
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#include "cose_key.h"
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#include "crypto.h"
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#include "util.h"
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#define check_ret(r) _check_ret(r,__LINE__, __FILE__)
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static void _check_ret(CborError ret, int line, const char * filename)
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{
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if (ret != CborNoError)
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{
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printf("CborError: 0x%x: %s: %d: %s\n", ret, filename, line, cbor_error_string(ret));
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exit(1);
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}
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}
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static const char * cbor_value_get_type_string(const CborValue *value)
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{
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switch(cbor_value_get_type(value))
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{
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case CborIntegerType:
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return "CborIntegerType";
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break;
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case CborByteStringType:
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return "CborByteStringType";
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break;
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case CborTextStringType:
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return "CborTextStringType";
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break;
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case CborArrayType:
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return "CborArrayType";
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break;
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case CborMapType:
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return "CborMapType";
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break;
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case CborTagType:
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return "CborTagType";
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break;
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case CborSimpleType:
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return "CborSimpleType";
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break;
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case CborBooleanType:
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return "CborBooleanType";
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break;
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case CborNullType:
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return "CborNullType";
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break;
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case CborUndefinedType:
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return "CborUndefinedType";
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break;
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case CborHalfFloatType:
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return "CborHalfFloatType";
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break;
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case CborFloatType:
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return "CborFloatType";
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break;
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case CborDoubleType:
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return "CborDoubleType";
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break;
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}
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return "Invalid type";
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}
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void ctap_get_info(CborEncoder * encoder)
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{
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int ret;
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CborEncoder array;
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CborEncoder map;
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const int number_of_map_items = 2;
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const int number_of_versions = 2;
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ret = cbor_encoder_create_map(encoder, &map, number_of_map_items);
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check_ret(ret);
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{
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ret = cbor_encode_uint(&map, 0x01); // versions key
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check_ret(ret);
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{
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ret = cbor_encoder_create_array(&map, &array, number_of_versions);
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check_ret(ret);
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ret = cbor_encode_text_stringz(&array, "1.0");
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check_ret(ret);
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ret = cbor_encode_text_stringz(&array, "2.0");
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check_ret(ret);
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ret = cbor_encoder_close_container(&map, &array);
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check_ret(ret);
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}
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ret = cbor_encode_uint(&map, 0x03); // aaguid key
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check_ret(ret);
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{
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ret = cbor_encode_byte_string(&map, CTAP_AAGUID, 16);
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check_ret(ret);
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}
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}
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ret = cbor_encoder_close_container(encoder, &map);
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check_ret(ret);
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}
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static int parse_client_data_hash(CTAP_makeCredential * MC, CborValue * val)
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{
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size_t sz;
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int ret;
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if (cbor_value_get_type(val) != CborByteStringType)
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{
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printf("error, wrong type\n");
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return -1;
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}
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ret = cbor_value_calculate_string_length(val, &sz);
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check_ret(ret);
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if (sz != CLIENT_DATA_HASH_SIZE)
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{
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printf("error, wrong size for client data hash\n");
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return -1;
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}
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ret = cbor_value_copy_byte_string(val, MC->clientDataHash, &sz, NULL);
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check_ret(ret);
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MC->paramsParsed |= PARAM_clientDataHash;
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return 0;
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}
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static int parse_user(CTAP_makeCredential * MC, CborValue * val)
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{
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size_t sz, map_length;
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uint8_t key[8];
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int ret;
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int i;
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CborValue map;
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if (cbor_value_get_type(val) != CborMapType)
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{
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printf("error, wrong type\n");
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return -1;
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}
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ret = cbor_value_enter_container(val,&map);
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check_ret(ret);
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ret = cbor_value_get_map_length(val, &map_length);
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check_ret(ret);
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for (i = 0; i < map_length; i++)
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{
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if (cbor_value_get_type(&map) != CborTextStringType)
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{
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printf("Error, expecting text string type for user map key, got %s\n", cbor_value_get_type_string(&map));
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return -1;
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}
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sz = sizeof(key);
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ret = cbor_value_copy_text_string(&map, key, &sz, NULL);
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if (ret == CborErrorOutOfMemory)
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{
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printf("Error, rp map key is too large\n");
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return -1;
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}
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check_ret(ret);
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key[sizeof(key) - 1] = 0;
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ret = cbor_value_advance(&map);
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check_ret(ret);
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if (strcmp(key, "id") == 0)
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{
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if (cbor_value_get_type(&map) != CborByteStringType)
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{
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printf("Error, expecting byte string type for rp map value\n");
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return -1;
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}
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sz = USER_ID_MAX_SIZE;
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ret = cbor_value_copy_byte_string(&map, MC->userId, &sz, NULL);
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if (ret == CborErrorOutOfMemory)
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{
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printf("Error, USER_ID is too large\n");
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return -1;
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}
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MC->userIdSize = sz;
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check_ret(ret);
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}
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else if (strcmp(key, "name") == 0)
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{
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sz = USER_NAME_LIMIT;
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ret = cbor_value_copy_text_string(&map, MC->userName, &sz, NULL);
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if (ret != CborErrorOutOfMemory)
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{ // Just truncate the name it's okay
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check_ret(ret);
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}
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MC->userName[USER_NAME_LIMIT - 1] = 0;
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}
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else
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{
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printf("ignoring key %s for user map\n", key);
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}
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ret = cbor_value_advance(&map);
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check_ret(ret);
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}
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MC->paramsParsed |= PARAM_user;
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return 0;
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}
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static int parse_pub_key_cred_param(CborValue * val, uint8_t * cred_type, int32_t * alg_type)
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{
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CborValue map;
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CborValue cred;
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CborValue alg;
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int ret;
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uint8_t type_str[16];
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size_t sz = sizeof(type_str);
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if (cbor_value_get_type(val) != CborMapType)
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{
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printf("error, expecting map type\n");
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return -1;
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}
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ret = cbor_value_map_find_value(val, "type", &cred);
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check_ret(ret);
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ret = cbor_value_map_find_value(val, "alg", &alg);
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check_ret(ret);
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if (cbor_value_get_type(&cred) != CborTextStringType)
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{
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printf("Error, parse_pub_key could not find credential param\n");
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return -1;
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}
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if (cbor_value_get_type(&alg) != CborIntegerType)
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{
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printf("Error, parse_pub_key could not find alg param\n");
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return -1;
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}
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ret = cbor_value_copy_text_string(&cred, type_str, &sz, NULL);
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check_ret(ret);
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type_str[sizeof(type_str) - 1] = 0;
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if (strcmp(type_str, "public-key") == 0)
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{
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*cred_type = PUB_KEY_CRED_PUB_KEY;
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}
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else
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{
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*cred_type = PUB_KEY_CRED_UNKNOWN;
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}
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ret = cbor_value_get_int_checked(&alg, alg_type);
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check_ret(ret);
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return 0;
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}
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// Check if public key credential+algorithm type is supported
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static int pub_key_cred_param_supported(uint8_t cred, int32_t alg)
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{
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if (cred == PUB_KEY_CRED_PUB_KEY)
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{
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if (alg == COSE_ALG_ES256)
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{
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return CREDENTIAL_IS_SUPPORTED;
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}
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}
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return CREDENTIAL_NOT_SUPPORTED;
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}
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static int parse_pub_key_cred_params(CTAP_makeCredential * MC, CborValue * val)
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{
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size_t sz, arr_length;
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uint8_t cred_type;
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int32_t alg_type;
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uint8_t key[8];
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int ret;
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int i;
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CborValue arr;
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if (cbor_value_get_type(val) != CborArrayType)
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{
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printf("error, expecting array type\n");
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return -1;
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}
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ret = cbor_value_enter_container(val,&arr);
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check_ret(ret);
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ret = cbor_value_get_array_length(val, &arr_length);
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check_ret(ret);
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for (i = 0; i < arr_length; i++)
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{
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if (parse_pub_key_cred_param(&arr, &cred_type, &alg_type) == 0)
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{
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if (pub_key_cred_param_supported(cred_type, alg_type) == CREDENTIAL_IS_SUPPORTED)
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{
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MC->publicKeyCredentialType = cred_type;
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MC->COSEAlgorithmIdentifier = alg_type;
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MC->paramsParsed |= PARAM_pubKeyCredParams;
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return 0;
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}
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}
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else
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{
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// Continue? fail?
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}
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ret = cbor_value_advance(&arr);
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check_ret(ret);
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}
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printf("Error, no public key credential parameters are supported!\n");
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return -1;
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}
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static int parse_rp(CTAP_makeCredential * MC, CborValue * val)
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{
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size_t sz, map_length;
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uint8_t key[8];
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int ret;
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int i;
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CborValue map;
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if (cbor_value_get_type(val) != CborMapType)
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{
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printf("error, wrong type\n");
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return -1;
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}
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ret = cbor_value_enter_container(val,&map);
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check_ret(ret);
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ret = cbor_value_get_map_length(val, &map_length);
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check_ret(ret);
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for (i = 0; i < map_length; i++)
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{
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if (cbor_value_get_type(&map) != CborTextStringType)
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{
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printf("Error, expecting text string type for rp map key, got %s\n", cbor_value_get_type_string(&map));
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return -1;
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}
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sz = sizeof(key);
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ret = cbor_value_copy_text_string(&map, key, &sz, NULL);
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if (ret == CborErrorOutOfMemory)
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{
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printf("Error, rp map key is too large\n");
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return -1;
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}
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check_ret(ret);
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key[sizeof(key) - 1] = 0;
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ret = cbor_value_advance(&map);
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check_ret(ret);
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if (cbor_value_get_type(&map) != CborTextStringType)
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{
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printf("Error, expecting text string type for rp map value\n");
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return -1;
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}
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if (strcmp(key, "id") == 0)
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{
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sz = DOMAIN_NAME_MAX_SIZE;
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ret = cbor_value_copy_text_string(&map, MC->rpId, &sz, NULL);
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if (ret == CborErrorOutOfMemory)
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{
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printf("Error, RP_ID is too large\n");
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return -1;
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}
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MC->rpId[DOMAIN_NAME_MAX_SIZE] = 0; // Extra byte defined in struct.
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MC->rpIdSize = sz;
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check_ret(ret);
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}
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else if (strcmp(key, "name") == 0)
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{
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sz = RP_NAME_LIMIT;
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ret = cbor_value_copy_text_string(&map, MC->rpName, &sz, NULL);
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if (ret != CborErrorOutOfMemory)
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{ // Just truncate the name it's okay
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check_ret(ret);
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}
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MC->rpName[RP_NAME_LIMIT - 1] = 0;
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}
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else
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{
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printf("ignoring key %s for RP map\n", key);
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}
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ret = cbor_value_advance(&map);
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check_ret(ret);
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}
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MC->paramsParsed |= PARAM_rp;
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return 0;
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}
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static int ctap_parse_make_credential(CTAP_makeCredential * MC, CborEncoder * encoder, uint8_t * request, int length)
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{
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int ret;
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int i;
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int key;
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size_t map_length;
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size_t sz;
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CborParser parser;
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CborValue it,map;
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memset(MC, 0, sizeof(CTAP_makeCredential));
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ret = cbor_parser_init(request, length, CborValidateCanonicalFormat, &parser, &it);
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check_ret(ret);
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CborType type = cbor_value_get_type(&it);
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if (type != CborMapType)
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{
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printf("Error, expecting cbor map\n");
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return -1;
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}
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ret = cbor_value_enter_container(&it,&map);
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check_ret(ret);
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ret = cbor_value_get_map_length(&it, &map_length);
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check_ret(ret);
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printf("map has %d elements\n",map_length);
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for (i = 0; i < map_length; i++)
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{
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type = cbor_value_get_type(&map);
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if (type != CborIntegerType)
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{
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printf("Error, expecting int for map key\n");
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}
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ret = cbor_value_get_int_checked(&map, &key);
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check_ret(ret);
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ret = cbor_value_advance(&map);
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check_ret(ret);
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switch(key)
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{
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case MC_clientDataHash:
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printf("CTAP_clientDataHash\n");
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ret = parse_client_data_hash(MC, &map);
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printf(" "); dump_hex(MC->clientDataHash, 32);
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break;
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case MC_rp:
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printf("CTAP_rp\n");
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ret = parse_rp(MC, &map);
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printf(" ID: %s\n", MC->rpId);
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printf(" name: %s\n", MC->rpName);
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break;
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case MC_user:
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printf("CTAP_user\n");
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ret = parse_user(MC, &map);
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printf(" ID: "); dump_hex(MC->userId, MC->userIdSize);
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printf(" name: %s\n", MC->userName);
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break;
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case MC_pubKeyCredParams:
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printf("CTAP_pubKeyCredParams\n");
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ret = parse_pub_key_cred_params(MC, &map);
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printf(" cred_type: 0x%02x\n", MC->publicKeyCredentialType);
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printf(" alg_type: %d\n", MC->COSEAlgorithmIdentifier);
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break;
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case MC_excludeList:
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printf("CTAP_excludeList\n");
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break;
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case MC_extensions:
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printf("CTAP_extensions\n");
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break;
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case MC_options:
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printf("CTAP_options\n");
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break;
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case MC_pinAuth:
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printf("CTAP_pinAuth\n");
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break;
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case MC_pinProtocol:
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printf("CTAP_pinProtocol\n");
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break;
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default:
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printf("invalid key %d\n", key);
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}
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if (ret != 0)
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{
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return ret;
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}
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cbor_value_advance(&map);
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check_ret(ret);
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}
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return 0;
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}
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static int ctap_generate_cose_key(CTAP_makeCredential * MC, CborEncoder * cose_key, uint8_t * rpId, int l1, uint8_t * entropy, int l2)
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{
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uint8_t x[32], y[32];
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int ret;
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CborEncoder map;
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ret = cbor_encoder_create_map(cose_key, &map, 5);
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check_ret(ret);
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if (MC->publicKeyCredentialType != PUB_KEY_CRED_PUB_KEY)
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{
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printf("Error, pubkey credential type not supported\n");
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return -1;
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}
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switch(MC->COSEAlgorithmIdentifier)
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{
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case COSE_ALG_ES256:
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crypto_ecc256_init();
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crypto_ecc256_derive_public_key(rpId, l1,
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entropy, l2, x, y);
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break;
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default:
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printf("Error, COSE alg %d not supported\n", MC->COSEAlgorithmIdentifier);
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return -1;
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}
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{
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ret = cbor_encode_int(&map, COSE_KEY_LABEL_KTY);
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check_ret(ret);
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ret = cbor_encode_int(&map, COSE_KEY_KTY_EC2);
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check_ret(ret);
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}
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{
|
|
ret = cbor_encode_int(&map, COSE_KEY_LABEL_ALG);
|
|
check_ret(ret);
|
|
ret = cbor_encode_int(&map, MC->COSEAlgorithmIdentifier);
|
|
check_ret(ret);
|
|
}
|
|
|
|
{
|
|
ret = cbor_encode_int(&map, COSE_KEY_LABEL_CRV);
|
|
check_ret(ret);
|
|
ret = cbor_encode_int(&map, COSE_KEY_CRV_P256);
|
|
check_ret(ret);
|
|
}
|
|
|
|
|
|
{
|
|
ret = cbor_encode_int(&map, COSE_KEY_LABEL_X);
|
|
check_ret(ret);
|
|
ret = cbor_encode_byte_string(&map, x, 32);
|
|
check_ret(ret);
|
|
}
|
|
|
|
{
|
|
ret = cbor_encode_int(&map, COSE_KEY_LABEL_Y);
|
|
check_ret(ret);
|
|
ret = cbor_encode_byte_string(&map, y, 32);
|
|
check_ret(ret);
|
|
}
|
|
|
|
ret = cbor_encoder_close_container(cose_key, &map);
|
|
check_ret(ret);
|
|
}
|
|
|
|
static int ctap_make_auth_data(CTAP_makeCredential * MC, CborEncoder * map, uint8_t * auth_data_buf, int len)
|
|
{
|
|
CborEncoder cose_key;
|
|
int auth_data_sz, ret;
|
|
CTAP_authData * authData = (CTAP_authData *)auth_data_buf;
|
|
|
|
uint8_t * cose_key_buf = auth_data_buf + sizeof(CTAP_authData);
|
|
cbor_encoder_init(&cose_key, cose_key_buf, len - sizeof(CTAP_authData), 0);
|
|
|
|
crypto_sha256_init();
|
|
crypto_sha256_update(MC->rpId, MC->rpIdSize);
|
|
crypto_sha256_final(authData->rpIdHash);
|
|
|
|
authData->flags = (ctap_user_presence_test() << 0);
|
|
authData->flags |= (ctap_user_verification(0) << 2);
|
|
authData->flags |= (1 << 6);//include attestation data
|
|
|
|
authData->signCount = ctap_atomic_count();
|
|
|
|
memmove(authData->attest.aaguid, CTAP_AAGUID, 16);
|
|
authData->attest.credLenL = CREDENTIAL_ID_SIZE & 0x00FF;
|
|
authData->attest.credLenH = (CREDENTIAL_ID_SIZE & 0xFF00) >> 8;
|
|
|
|
#if CREDENTIAL_ID_SIZE != 48
|
|
#error "need to update credential ID layout"
|
|
#else
|
|
memmove(authData->attest.credentialId, authData->rpIdHash, 16);
|
|
ctap_generate_rng(authData->attest.credentialId + 16, 32);
|
|
|
|
ctap_generate_cose_key(MC, &cose_key, authData->attest.credentialId, 16,
|
|
authData->attest.credentialId, 32);
|
|
|
|
printf("COSE_KEY: "); dump_hex(cose_key_buf, cbor_encoder_get_buffer_size(&cose_key, cose_key_buf));
|
|
|
|
auth_data_sz = sizeof(CTAP_authData) + cbor_encoder_get_buffer_size(&cose_key, cose_key_buf);
|
|
#endif
|
|
|
|
{
|
|
ret = cbor_encode_int(map,RESP_authData);
|
|
check_ret(ret);
|
|
ret = cbor_encode_byte_string(map, auth_data_buf, auth_data_sz);
|
|
|
|
check_ret(ret);
|
|
}
|
|
|
|
{
|
|
ret = cbor_encode_int(map,RESP_fmt);
|
|
check_ret(ret);
|
|
ret = cbor_encode_text_stringz(map, "packed");
|
|
check_ret(ret);
|
|
}
|
|
return auth_data_sz;
|
|
}
|
|
|
|
// @data data to hash before signature
|
|
// @clientDataHash for signature
|
|
// @tmp buffer for hash. (can be same as data if data >= 32 bytes)
|
|
// @sigbuf location to deposit signature (must be 64 bytes)
|
|
// @sigder location to deposit der signature (must be 72 bytes)
|
|
// @return length of der signature
|
|
int ctap_calculate_signature(uint8_t * data, int datalen, uint8_t * clientDataHash, uint8_t * hashbuf, uint8_t * sigbuf, uint8_t * sigder)
|
|
{
|
|
// calculate attestation sig
|
|
crypto_sha256_init();
|
|
crypto_sha256_update(data, datalen);
|
|
crypto_sha256_update(clientDataHash, CLIENT_DATA_HASH_SIZE);
|
|
crypto_sha256_final(hashbuf);
|
|
|
|
crypto_ecc256_load_attestation_key();
|
|
crypto_ecc256_sign(hashbuf, 32, sigbuf);
|
|
|
|
/*printf("signature hash: "); dump_hex(hashbuf, 32);*/
|
|
/*printf("R: "); dump_hex(sigbuf, 32);*/
|
|
/*printf("S: "); dump_hex(sigbuf+32, 32);*/
|
|
|
|
// Need to caress into dumb der format ..
|
|
uint8_t pad_s = (sigbuf[32] & 0x80) == 0x80;
|
|
uint8_t pad_r = (sigbuf[0] & 0x80) == 0x80;
|
|
sigder[0] = 0x30;
|
|
sigder[1] = 0x44 + pad_s + pad_r;
|
|
|
|
sigder[2] = 0x02;
|
|
sigder[3 + pad_r] = 0;
|
|
sigder[3] = 0x20 + pad_r;
|
|
memmove(sigder + 4 + pad_r, sigbuf, 32);
|
|
|
|
sigder[4 + 32 + pad_r] = 0x02;
|
|
sigder[5 + 32 + pad_r + pad_s] = 0;
|
|
sigder[5 + 32 + pad_r] = 0x20 + pad_s;
|
|
memmove(sigder + 6 + 32 + pad_r + pad_s, sigbuf + 32, 32);
|
|
//
|
|
|
|
return 0x46 + pad_s + pad_r;
|
|
}
|
|
|
|
void ctap_add_attest_statement(CborEncoder * map, uint8_t * sigder, int len)
|
|
{
|
|
int ret;
|
|
|
|
CborEncoder stmtmap;
|
|
CborEncoder x5carr;
|
|
|
|
|
|
ret = cbor_encode_int(map,RESP_attStmt);
|
|
check_ret(ret);
|
|
ret = cbor_encoder_create_map(map, &stmtmap, 3);
|
|
check_ret(ret);
|
|
{
|
|
ret = cbor_encode_text_stringz(&stmtmap,"alg");
|
|
check_ret(ret);
|
|
ret = cbor_encode_int(&stmtmap,COSE_ALG_ES256);
|
|
check_ret(ret);
|
|
}
|
|
{
|
|
ret = cbor_encode_text_stringz(&stmtmap,"sig");
|
|
check_ret(ret);
|
|
ret = cbor_encode_byte_string(&stmtmap, sigder, len);
|
|
check_ret(ret);
|
|
}
|
|
{
|
|
ret = cbor_encode_text_stringz(&stmtmap,"x5c");
|
|
check_ret(ret);
|
|
ret = cbor_encoder_create_array(&stmtmap, &x5carr, 1);
|
|
check_ret(ret);
|
|
{
|
|
ret = cbor_encode_byte_string(&x5carr, attestation_cert_der, attestation_cert_der_size);
|
|
check_ret(ret);
|
|
ret = cbor_encoder_close_container(&stmtmap, &x5carr);
|
|
check_ret(ret);
|
|
}
|
|
}
|
|
|
|
ret = cbor_encoder_close_container(map, &stmtmap);
|
|
check_ret(ret);
|
|
}
|
|
|
|
|
|
void ctap_make_credential(CborEncoder * encoder, uint8_t * request, int length)
|
|
{
|
|
CTAP_makeCredential MC;
|
|
int ret;
|
|
uint8_t auth_data_buf[200];
|
|
uint8_t * hashbuf = auth_data_buf + 0;
|
|
uint8_t * sigbuf = auth_data_buf + 32;
|
|
uint8_t * sigder = auth_data_buf + 32 + 64;
|
|
|
|
ret = ctap_parse_make_credential(&MC,encoder,request,length);
|
|
if (ret != 0)
|
|
{
|
|
printf("error, parse_make_credential failed\n");
|
|
return;
|
|
}
|
|
if ((MC.paramsParsed & MC_requiredMask) != MC_requiredMask)
|
|
{
|
|
printf("error, required parameter(s) for makeCredential are missing\n");
|
|
return;
|
|
}
|
|
|
|
|
|
CborEncoder map;
|
|
ret = cbor_encoder_create_map(encoder, &map, 3);
|
|
check_ret(ret);
|
|
|
|
int auth_data_sz = ctap_make_auth_data(&MC, &map, auth_data_buf, sizeof(auth_data_buf));
|
|
|
|
int sigder_sz = ctap_calculate_signature(auth_data_buf, auth_data_sz, MC.clientDataHash, auth_data_buf, sigbuf, sigder);
|
|
|
|
printf("der sig [%d]: ", sigder_sz); dump_hex(sigder, sigder_sz);
|
|
|
|
ctap_add_attest_statement(&map, sigder, sigder_sz);
|
|
|
|
ret = cbor_encoder_close_container(encoder, &map);
|
|
check_ret(ret);
|
|
}
|
|
|
|
|
|
uint8_t ctap_handle_packet(uint8_t * pkt_raw, int length, CTAP_RESPONSE * resp)
|
|
{
|
|
uint8_t cmd = *pkt_raw;
|
|
pkt_raw++;
|
|
|
|
|
|
static uint8_t buf[1024];
|
|
memset(buf,0,sizeof(buf));
|
|
|
|
resp->data = buf;
|
|
resp->length = 0;
|
|
|
|
CborEncoder encoder;
|
|
cbor_encoder_init(&encoder, buf, sizeof(buf), 0);
|
|
|
|
printf("cbor req: "); dump_hex(pkt_raw, length - 1);
|
|
|
|
|
|
switch(cmd)
|
|
{
|
|
case CTAP_MAKE_CREDENTIAL:
|
|
printf("CTAP_MAKE_CREDENTIAL\n");
|
|
ctap_make_credential(&encoder, pkt_raw, length - 1);
|
|
dump_hex(buf, cbor_encoder_get_buffer_size(&encoder, buf));
|
|
resp->length = cbor_encoder_get_buffer_size(&encoder, buf);
|
|
break;
|
|
case CTAP_GET_ASSERTION:
|
|
printf("CTAP_GET_ASSERTION\n");
|
|
break;
|
|
case CTAP_CANCEL:
|
|
printf("CTAP_CANCEL\n");
|
|
break;
|
|
case CTAP_GET_INFO:
|
|
printf("CTAP_GET_INFO\n");
|
|
ctap_get_info(&encoder);
|
|
dump_hex(buf, cbor_encoder_get_buffer_size(&encoder, buf));
|
|
|
|
resp->length = cbor_encoder_get_buffer_size(&encoder, buf);
|
|
|
|
|
|
break;
|
|
case CTAP_CLIENT_PIN:
|
|
printf("CTAP_CLIENT_PIN\n");
|
|
break;
|
|
case CTAP_RESET:
|
|
printf("CTAP_RESET\n");
|
|
break;
|
|
case GET_NEXT_ASSERTION:
|
|
printf("CTAP_NEXT_ASSERTION\n");
|
|
break;
|
|
default:
|
|
printf("error, invalid cmd\n");
|
|
}
|
|
|
|
printf("cbor input structure: %d bytes\n", length - 1);
|
|
printf("cbor output structure: %d bytes\n", resp->length);
|
|
return 0;
|
|
}
|