90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
/**
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* A playground for testing mbedtls functions
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*/
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#include "mbedtls/bignum.h"
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int convertToString(unsigned char* string, int len) {
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// load up the mpi
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mbedtls_mpi mpi;
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mbedtls_mpi_init(&mpi);
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int retVal = mbedtls_mpi_read_binary(&mpi, string, len);
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if (retVal < 0) {
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mbedtls_mpi_free(&mpi);
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return 0;
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}
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// put it in string form so we can see it
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size_t buffer_len = 50;
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size_t output_len = 0;
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char buffer[buffer_len];
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retVal = mbedtls_mpi_write_string(&mpi, 10, buffer, buffer_len, &output_len);
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if (retVal < 0) {
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mbedtls_mpi_free(&mpi);
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return 0;
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}
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for(int i = 0; i < output_len; i++) {
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printf("%02x", buffer[i]);
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}
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printf("\n");
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mbedtls_mpi_free(&mpi);
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return 1;
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}
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int test_mbedtls_varint_128_binary() {
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// the values I'm working with 0x08, 0x00, 0x18, 0xa7, 0x09
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unsigned char starting_val[5] = { 0x08, 0x00, 0x18, 0x87, 0x09 };
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size_t starting_len = 5;
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for(int i = 0; i < 5; i++) {
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if (convertToString(&starting_val[i], 5 - i) != 1)
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return 0;
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}
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printf(" 3 and 4\n");
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if (convertToString(&starting_val[2], 2) != 1) {
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return 0;
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}
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printf("And now the other way...\n");
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for(int i = 1; i <= 5; i--) {
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if (convertToString(starting_val, i) != 1)
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return 0;
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}
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return 1;
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}
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int test_mbedtls_varint_128_string() {
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// go from string to uint_128 and back again
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char* bigint_string = "47942806932686753431";
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mbedtls_mpi mpi;
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mbedtls_mpi_init(&mpi);
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int retVal = mbedtls_mpi_read_string( &mpi, 10, bigint_string );
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if (retVal < 0) {
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mbedtls_mpi_free(&mpi);
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return 0;
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}
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// now go back again
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size_t buffer_len = 50;
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size_t output_len = 0;
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char buffer[buffer_len];
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retVal = mbedtls_mpi_write_string(&mpi, 10, buffer, buffer_len, &output_len);
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if (retVal < 0) {
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mbedtls_mpi_free(&mpi);
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return 0;
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}
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if (strcmp(buffer, bigint_string) != 0) {
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mbedtls_mpi_free(&mpi);
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return 0;
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}
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mbedtls_mpi_free(&mpi);
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return 1;
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}
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