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mpi_get_uint

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This commit is contained in:
merlokk
2018-12-28 14:50:23 +02:00
parent 88d42a1af5
commit b1145ba577
1 changed files with 10 additions and 1 deletions
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11
client/emv/emv_roca.c
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@@ -64,6 +64,15 @@ int bitand_is_zero( mbedtls_mpi* a, mbedtls_mpi* b ) {
} }
mbedtls_mpi_uint mpi_get_uint(const mbedtls_mpi *X) {
if (X->n == 1) {
return X->p[0];
}
return 0;
}
bool emv_rocacheck(char *modulus) { bool emv_rocacheck(char *modulus) {
mbedtls_mpi *t_modulus = NULL; mbedtls_mpi *t_modulus = NULL;
@@ -93,7 +102,7 @@ bool emv_rocacheck(char *modulus) {
MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi(t_temp, t_modulus, t_prime) ); MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi(t_temp, t_modulus, t_prime) );
MBEDTLS_MPI_CHK( mbedtls_mpi_shift_l(g_one, t_temp) ); MBEDTLS_MPI_CHK( mbedtls_mpi_shift_l(g_one, mpi_get_uint(t_temp)) );
if (bitand_is_zero(t_temp, g_prints[i])) { if (bitand_is_zero(t_temp, g_prints[i])) {
PrintAndLogEx(FAILED, "No fingerprint found\n"); PrintAndLogEx(FAILED, "No fingerprint found\n");