mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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441 lines
15 KiB
C
441 lines
15 KiB
C
/*
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* emv-tools - a set of tools to work with EMV family of smart cards
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* Copyright (C) 2012, 2015 Dmitry Eremin-Solenikov
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "../emv_pk.h"
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#include "../crypto.h"
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#include "../dump.h"
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#include "../tlv.h"
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#include "../emv_pki.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "cda_test.h"
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struct emv_pk c_mchip_05 = {
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.rid = { 0xa0, 0x00, 0x00, 0x00, 0x04, },
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.index = 5,
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.hash_algo = HASH_SHA_1,
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.pk_algo = PK_RSA,
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.hash = {
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0xeb, 0xfa, 0x0d, 0x5d,
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0x06, 0xd8, 0xce, 0x70,
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0x2d, 0xa3, 0xea, 0xe8,
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0x90, 0x70, 0x1d, 0x45,
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0xe2, 0x74, 0xc8, 0x45,
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},
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.exp = { 0x03, },
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.elen = 1,
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.mlen = 1408 / 8,
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.modulus = (unsigned char[]) {
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0xb8, 0x04, 0x8a, 0xbc, 0x30, 0xc9, 0x0d, 0x97, 0x63, 0x36, 0x54, 0x3e, 0x3f, 0xd7, 0x09, 0x1c,
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0x8f, 0xe4, 0x80, 0x0d, 0xf8, 0x20, 0xed, 0x55, 0xe7, 0xe9, 0x48, 0x13, 0xed, 0x00, 0x55, 0x5b,
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0x57, 0x3f, 0xec, 0xa3, 0xd8, 0x4a, 0xf6, 0x13, 0x1a, 0x65, 0x1d, 0x66, 0xcf, 0xf4, 0x28, 0x4f,
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0xb1, 0x3b, 0x63, 0x5e, 0xdd, 0x0e, 0xe4, 0x01, 0x76, 0xd8, 0xbf, 0x04, 0xb7, 0xfd, 0x1c, 0x7b,
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0xac, 0xf9, 0xac, 0x73, 0x27, 0xdf, 0xaa, 0x8a, 0xa7, 0x2d, 0x10, 0xdb, 0x3b, 0x8e, 0x70, 0xb2,
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0xdd, 0xd8, 0x11, 0xcb, 0x41, 0x96, 0x52, 0x5e, 0xa3, 0x86, 0xac, 0xc3, 0x3c, 0x0d, 0x9d, 0x45,
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0x75, 0x91, 0x64, 0x69, 0xc4, 0xe4, 0xf5, 0x3e, 0x8e, 0x1c, 0x91, 0x2c, 0xc6, 0x18, 0xcb, 0x22,
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0xdd, 0xe7, 0xc3, 0x56, 0x8e, 0x90, 0x02, 0x2e, 0x6b, 0xba, 0x77, 0x02, 0x02, 0xe4, 0x52, 0x2a,
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0x2d, 0xd6, 0x23, 0xd1, 0x80, 0xe2, 0x15, 0xbd, 0x1d, 0x15, 0x07, 0xfe, 0x3d, 0xc9, 0x0c, 0xa3,
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0x10, 0xd2, 0x7b, 0x3e, 0xfc, 0xcd, 0x8f, 0x83, 0xde, 0x30, 0x52, 0xca, 0xd1, 0xe4, 0x89, 0x38,
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0xc6, 0x8d, 0x09, 0x5a, 0xac, 0x91, 0xb5, 0xf3, 0x7e, 0x28, 0xbb, 0x49, 0xec, 0x7e, 0xd5, 0x97,
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},
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};
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const unsigned char c_issuer_cert[] = {
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0x17, 0x14, 0x28, 0x4f, 0x76, 0x3b, 0x85, 0x86, 0xee, 0x6d, 0x31, 0x99, 0x51, 0xf7, 0xe6, 0x3f,
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0xa2, 0x50, 0x76, 0xe5, 0x0d, 0xc9, 0xd3, 0x20, 0x0b, 0xa9, 0x98, 0xd3, 0xa0, 0x52, 0xad, 0xba,
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0x9a, 0xb6, 0x9a, 0xc6, 0xad, 0x6a, 0xdd, 0x3c, 0xe0, 0x9f, 0x02, 0x78, 0xf4, 0x07, 0x4e, 0xc4,
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0xee, 0x9b, 0x1d, 0x22, 0x68, 0xa3, 0xe9, 0x53, 0x57, 0x5e, 0x45, 0x4e, 0x50, 0xcd, 0x86, 0x0b,
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0xf4, 0x24, 0xc5, 0x1c, 0x59, 0x77, 0x12, 0xd2, 0xaa, 0x05, 0x70, 0x89, 0xdd, 0x86, 0x73, 0xe5,
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0x1b, 0x1e, 0x1d, 0x71, 0x88, 0x03, 0x48, 0x92, 0x07, 0x7a, 0xc1, 0x8a, 0x6a, 0xe2, 0x34, 0x88,
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0xbe, 0xa9, 0xdf, 0x3b, 0x1a, 0x83, 0xf2, 0xc0, 0x80, 0x0c, 0xd7, 0xc5, 0xcd, 0xf2, 0xfd, 0xe0,
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0x49, 0x6f, 0x7b, 0xc3, 0x9f, 0xb4, 0xbf, 0x36, 0x32, 0x99, 0xbf, 0xa6, 0x37, 0xb2, 0xec, 0x33,
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0xc5, 0x07, 0xe3, 0x68, 0x21, 0xee, 0xc2, 0x07, 0x5f, 0x0e, 0x42, 0x0d, 0x38, 0xa1, 0xc9, 0xf3,
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0x12, 0x72, 0x61, 0xba, 0x31, 0x6c, 0x98, 0x76, 0x74, 0xfa, 0xdb, 0x20, 0xea, 0x7f, 0xeb, 0x75,
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0xee, 0x45, 0x5d, 0x12, 0x14, 0x6e, 0xa6, 0xf0, 0x2e, 0x8b, 0x01, 0xec, 0x2f, 0xa7, 0xa1, 0x15,
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};
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const unsigned char c_issuer_rem[] = {
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0x6e, 0x63, 0xb7, 0xbc, 0x70, 0xab, 0xdd, 0x09, 0x34, 0x1b, 0x34, 0xc0, 0x32, 0x86, 0xba, 0x9b,
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0xd8, 0x3b, 0xa7, 0x93, 0x6c, 0x5b, 0x77, 0x98, 0xfb, 0x22, 0xc5, 0xe5, 0x3f, 0xf2, 0x40, 0xa2,
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0x6d, 0xbd, 0x64, 0x15,
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};
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const unsigned char c_issuer_exp[] = {
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0x03,
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};
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const unsigned char c_icc_cert[] = {
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0xa4, 0x2f, 0xbe, 0xb1, 0x56, 0xb9, 0x8d, 0xcb, 0x05, 0x54, 0xda, 0x06, 0x2a, 0xdc, 0xa5, 0x30,
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0x9a, 0x91, 0xf0, 0x4f, 0xa2, 0xc7, 0xbd, 0x71, 0x02, 0xa8, 0xd7, 0x3f, 0x16, 0xa3, 0xcf, 0xad,
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0xe8, 0xaa, 0xdf, 0x4f, 0x3f, 0xe2, 0xa2, 0x12, 0x5c, 0xcd, 0xd7, 0x7c, 0x6b, 0x9f, 0x78, 0xb5,
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0xb4, 0x37, 0x1c, 0xe0, 0x80, 0x57, 0x25, 0xb0, 0xf9, 0xc0, 0x27, 0xaf, 0x14, 0x7d, 0x91, 0xe1,
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0xff, 0xdb, 0x20, 0x1e, 0x9c, 0x17, 0x0c, 0xe7, 0x77, 0x05, 0x3a, 0x17, 0x2a, 0xd5, 0x26, 0xdc,
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0xaf, 0xd3, 0x38, 0x95, 0xe1, 0xa9, 0x47, 0x30, 0x5c, 0x5b, 0x16, 0x7f, 0x2e, 0x7c, 0x6f, 0x99,
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0x15, 0x81, 0xa6, 0x52, 0xee, 0x47, 0x31, 0x54, 0x76, 0x0c, 0x2e, 0xd7, 0x74, 0x21, 0x4e, 0x50,
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0xdf, 0xec, 0xdd, 0x4c, 0xf2, 0x94, 0xc9, 0x74, 0xb8, 0x9e, 0xbc, 0xa2, 0x5b, 0x5a, 0xb3, 0xc0,
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0xbe, 0xb5, 0x0d, 0xfa, 0xf7, 0x82, 0xaf, 0xde, 0x14, 0x33, 0xd9, 0x0c, 0xa2, 0xa8, 0x9d, 0x65,
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0x1e, 0x75, 0xd6, 0x7e, 0xbc, 0x7c, 0x3e, 0x36, 0xf5, 0xa1, 0x65, 0xee, 0x61, 0x32, 0x61, 0x29,
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0x39, 0xc1, 0xec, 0xd3, 0x99, 0xe4, 0x60, 0x74, 0xb9, 0x96, 0xd9, 0x3a, 0x88, 0xe0, 0x1e, 0x0a,
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};
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const unsigned char c_icc_exp[] = {
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0x03,
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};
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const unsigned char c_sdad_cr[] = {
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0x1c, 0x00, 0x9f, 0xc4, 0x86, 0x79, 0x15, 0x7d, 0xbf, 0xf4, 0x5f, 0x65, 0xd3, 0x3f, 0xf7, 0x8d,
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0x4f, 0xcb, 0xf0, 0xcf, 0x5e, 0xa4, 0x20, 0x8d, 0x10, 0x7a, 0xe9, 0x5a, 0xa3, 0x8c, 0x54, 0x6d,
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0x0e, 0x5a, 0x18, 0xb8, 0x74, 0x03, 0xa1, 0x2b, 0xd4, 0x47, 0xa8, 0xbb, 0xfc, 0x1e, 0x49, 0xce,
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0x0b, 0x2e, 0x25, 0x13, 0x89, 0x20, 0x57, 0x03, 0xc9, 0xbb, 0x1a, 0x88, 0xcc, 0x79, 0xf1, 0xdd,
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0xc2, 0xf9, 0x84, 0x1e, 0xad, 0xf0, 0x7c, 0xe0, 0x7b, 0x62, 0x51, 0x1d, 0xdc, 0x93, 0xdf, 0x59,
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0xf2, 0x8f, 0x0e, 0x91, 0xf9, 0x23, 0x32, 0xd2, 0x9c, 0xde, 0xf2, 0xbc, 0xcb, 0x10, 0x08, 0x85,
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0x05, 0x00, 0xef, 0x3e, 0x47, 0x0a, 0x4c, 0xb1, 0x8c, 0xd9, 0x1a, 0xa5, 0xc1, 0xa1, 0x08, 0xf3,
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};
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const unsigned char c_ssd1[] = {
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0x5f, 0x25, 0x03, 0x14, 0x05, 0x01, 0x5f, 0x24, 0x03, 0x15, 0x06, 0x30, 0x5a, 0x08, 0x52, 0x85,
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0x88, 0x12, 0x54, 0x34, 0x56, 0x53, 0x5f, 0x34, 0x01, 0x01, 0x8e, 0x0c, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x1e, 0x03, 0x1f, 0x03, 0x9f, 0x07, 0x02, 0xff, 0x00, 0x9f, 0x0d, 0x05,
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0xbc, 0x50, 0xbc, 0x00, 0x00, 0x9f, 0x0e, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x9f, 0x0f, 0x05,
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0xbc, 0x70, 0xbc, 0x98, 0x00, 0x9f, 0x4a, 0x01, 0x82, 0x5f, 0x28, 0x02, 0x06, 0x43, 0x8c, 0x21,
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0x9f, 0x02, 0x06, 0x9f, 0x03, 0x06, 0x9f, 0x1a, 0x02, 0x95, 0x05, 0x5f, 0x2a, 0x02, 0x9a, 0x03,
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0x9c, 0x01, 0x9f, 0x37, 0x04, 0x9f, 0x35, 0x01, 0x9f, 0x45, 0x02, 0x9f, 0x4c, 0x08, 0x9f, 0x34,
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0x03, 0x8d, 0x0c, 0x91, 0x0a, 0x8a, 0x02, 0x95, 0x05, 0x9f, 0x37, 0x04, 0x9f, 0x4c, 0x08,
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0x39, 0x00,
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};
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static const struct tlv ssd1_tlv = {
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.len = sizeof(c_ssd1),
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.value = c_ssd1,
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};
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const unsigned char c_pan[] = {
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0x52, 0x85, 0x88, 0x12, 0x54, 0x34, 0x56, 0x53,
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};
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const unsigned char c_dd1[] = {
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0x12, 0x34, 0x57, 0x79,
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};
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const unsigned char c_dd2[] = {
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0x9f, 0x27, 0x01, 0x40, 0x9f, 0x36, 0x02, 0x00, 0x10, 0x9f, 0x10, 0x12, 0x00, 0x10, 0x90, 0x40,
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0x01, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
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};
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const unsigned char c_crm1[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x43, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x06, 0x43, 0x14, 0x09, 0x25, 0x50, 0x12, 0x34, 0x57, 0x79, 0x23, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x03, 0x00,
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};
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static const struct tlv crm1_tlv = {
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.len = sizeof(c_crm1),
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.value = c_crm1,
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};
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static int cda_test_raw(bool verbose) {
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const struct emv_pk *pk = &c_mchip_05;
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struct crypto_pk *kcp = crypto_pk_open(PK_RSA,
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pk->modulus, pk->mlen,
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pk->exp, pk->elen);
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if (!kcp)
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return 1;
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unsigned char *ipk_data;
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size_t ipk_data_len;
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ipk_data = crypto_pk_encrypt(kcp, c_issuer_cert, sizeof(c_issuer_cert), &ipk_data_len);
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crypto_pk_close(kcp);
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if (!ipk_data)
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return 1;
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if (verbose) {
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printf("issuer cert:\n");
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dump_buffer(ipk_data, ipk_data_len, stdout, 0);
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}
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size_t ipk_pk_len = ipk_data[13];
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unsigned char *ipk_pk = malloc(ipk_pk_len);
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memcpy(ipk_pk, ipk_data + 15, ipk_data_len - 36);
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memcpy(ipk_pk + ipk_data_len - 36, c_issuer_rem, sizeof(c_issuer_rem));
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struct crypto_hash *ch;
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ch = crypto_hash_open(HASH_SHA_1);
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if (!ch) {
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free(ipk_pk);
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free(ipk_data);
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return 1;
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}
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crypto_hash_write(ch, ipk_data + 1, 14);
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crypto_hash_write(ch, ipk_pk, ipk_pk_len);
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crypto_hash_write(ch, c_issuer_exp, sizeof(c_issuer_exp));
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unsigned char *h = crypto_hash_read(ch);
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if (!h) {
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crypto_hash_close(ch);
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free(ipk_pk);
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free(ipk_data);
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return 1;
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}
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if (verbose) {
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printf("crypto hash:\n");
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dump_buffer(h, 20, stdout, 0);
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}
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if (memcmp(ipk_data + ipk_data_len - 21, h, 20)) {
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crypto_hash_close(ch);
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free(ipk_pk);
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free(ipk_data);
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return 1;
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}
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crypto_hash_close(ch);
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free(ipk_data);
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struct crypto_pk *ikcp = crypto_pk_open(PK_RSA, ipk_pk, (int) ipk_pk_len,
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c_issuer_exp, (int) sizeof(c_issuer_exp));
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free(ipk_pk);
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if (!ikcp)
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return 1;
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unsigned char *iccpk_data;
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size_t iccpk_data_len;
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iccpk_data = crypto_pk_encrypt(ikcp, c_icc_cert, sizeof(c_icc_cert), &iccpk_data_len);
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crypto_pk_close(ikcp);
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if (!iccpk_data)
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return 1;
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if (verbose) {
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printf("icc cert:\n");
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dump_buffer(iccpk_data, iccpk_data_len, stdout, 0);
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}
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size_t iccpk_pk_len = iccpk_data[19];
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unsigned char *iccpk_pk = malloc(iccpk_pk_len);
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memcpy(iccpk_pk, iccpk_data + 21, /*iccpk_data_len - 36*/iccpk_pk_len);
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/*memcpy(iccpk_pk + iccpk_data_len - 36, icc_rem, sizeof(icc_rem));*/
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ch = crypto_hash_open(HASH_SHA_1);
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if (!ch) {
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free(iccpk_pk);
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free(iccpk_data);
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return 1;
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}
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crypto_hash_write(ch, iccpk_data + 1, iccpk_data_len - 22);
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crypto_hash_write(ch, c_icc_exp, sizeof(c_icc_exp));
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crypto_hash_write(ch, c_ssd1, sizeof(c_ssd1));
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h = crypto_hash_read(ch);
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if (!h) {
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crypto_hash_close(ch);
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free(iccpk_pk);
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free(iccpk_data);
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return 1;
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}
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if (verbose) {
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printf("crypto hash1.1:\n");
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dump_buffer(h, 20, stdout, 0);
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}
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if (memcmp(iccpk_data + iccpk_data_len - 21, h, 20)) {
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crypto_hash_close(ch);
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free(iccpk_pk);
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free(iccpk_data);
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return 1;
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}
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crypto_hash_close(ch);
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free(iccpk_data);
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struct crypto_pk *icckcp = crypto_pk_open(PK_RSA, iccpk_pk, (int) iccpk_pk_len,
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c_issuer_exp, (int) sizeof(c_issuer_exp));
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free(iccpk_pk);
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if (!icckcp)
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return 1;
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size_t sdad_len;
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unsigned char *sdad = crypto_pk_encrypt(icckcp, c_sdad_cr, sizeof(c_sdad_cr), &sdad_len);
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crypto_pk_close(icckcp);
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if (!sdad)
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return 1;
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if (verbose) {
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printf("SDAD:\n");
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dump_buffer(sdad, sdad_len, stdout, 0);
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}
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ch = crypto_hash_open(HASH_SHA_1);
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if (!ch) {
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free(sdad);
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return 1;
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}
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crypto_hash_write(ch, sdad + 1, sdad_len - 22);
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crypto_hash_write(ch, c_dd1, sizeof(c_dd1));
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unsigned char *h2 = crypto_hash_read(ch);
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if (!h2) {
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crypto_hash_close(ch);
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free(sdad);
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return 1;
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}
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if (verbose) {
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printf("crypto hash2:\n");
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dump_buffer(h2, 20, stdout, 0);
|
|
}
|
|
|
|
crypto_hash_close(ch);
|
|
|
|
ch = crypto_hash_open(HASH_SHA_1);
|
|
if (!ch) {
|
|
free(sdad);
|
|
return 1;
|
|
}
|
|
|
|
crypto_hash_write(ch, c_crm1, sizeof(c_crm1));
|
|
crypto_hash_write(ch, c_dd2, sizeof(c_dd2));
|
|
|
|
h = crypto_hash_read(ch);
|
|
if (!h) {
|
|
crypto_hash_close(ch);
|
|
free(sdad);
|
|
return 1;
|
|
}
|
|
|
|
if (verbose) {
|
|
printf("crypto hash2.1:\n");
|
|
dump_buffer(h, 20, stdout, 0);
|
|
}
|
|
|
|
if (memcmp(sdad + 5 + 8 + 1 + 8, h, 20)) {
|
|
crypto_hash_close(ch);
|
|
free(sdad);
|
|
return 1;
|
|
}
|
|
|
|
crypto_hash_close(ch);
|
|
|
|
free(sdad);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cda_test_pk(bool verbose) {
|
|
const struct emv_pk *pk = &c_mchip_05;
|
|
struct tlvdb *db;
|
|
|
|
db = tlvdb_external(0x90, sizeof(c_issuer_cert), c_issuer_cert);
|
|
tlvdb_add(db, tlvdb_external(0x9f32, sizeof(c_issuer_exp), c_issuer_exp));
|
|
tlvdb_add(db, tlvdb_external(0x92, sizeof(c_issuer_rem), c_issuer_rem));
|
|
tlvdb_add(db, tlvdb_external(0x5a, sizeof(c_pan), c_pan));
|
|
|
|
struct emv_pk *ipk = emv_pki_recover_issuer_cert(pk, db);
|
|
if (!ipk) {
|
|
fprintf(stderr, "Could not recover Issuer certificate!\n");
|
|
tlvdb_free(db);
|
|
return 2;
|
|
}
|
|
|
|
tlvdb_add(db, tlvdb_external(0x9f46, sizeof(c_icc_cert), c_icc_cert));
|
|
tlvdb_add(db, tlvdb_external(0x9f47, sizeof(c_icc_exp), c_icc_exp));
|
|
/*tlvdb_add(db, tlvdb_external(0x9f48, sizeof(issuer_rem), issuer_rem));*/
|
|
|
|
struct emv_pk *iccpk = emv_pki_recover_icc_cert(ipk, db, &ssd1_tlv);
|
|
if (!iccpk) {
|
|
fprintf(stderr, "Could not recover ICC certificate!\n");
|
|
emv_pk_free(ipk);
|
|
tlvdb_free(db);
|
|
return 2;
|
|
}
|
|
|
|
tlvdb_add(db, tlvdb_fixed(0x9f37, sizeof(c_dd1), c_dd1));
|
|
|
|
struct tlvdb *cda_db;
|
|
cda_db = tlvdb_fixed(0x9f27, 1, (unsigned char[]) { 0x40 });
|
|
tlvdb_add(cda_db, tlvdb_fixed(0x9f36, 2, (unsigned char[]) { 0x00, 0x10 }));
|
|
tlvdb_add(cda_db, tlvdb_external(0x9f4b, sizeof(c_sdad_cr), c_sdad_cr));
|
|
tlvdb_add(cda_db, tlvdb_fixed(0x9f10, 0x12,
|
|
(unsigned char[]) { 0x00, 0x10, 0x90, 0x40, 0x01, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff}));
|
|
|
|
struct tlvdb *idndb = emv_pki_perform_cda(iccpk, db, cda_db,
|
|
NULL,
|
|
&crm1_tlv,
|
|
NULL);
|
|
if (!idndb) {
|
|
fprintf(stderr, "Could not recover IDN!\n");
|
|
tlvdb_free(cda_db);
|
|
emv_pk_free(iccpk);
|
|
emv_pk_free(ipk);
|
|
tlvdb_free(db);
|
|
return 2;
|
|
}
|
|
|
|
const struct tlv *idn = tlvdb_get(idndb, 0x9f4c, NULL);
|
|
if (!idn) {
|
|
fprintf(stderr, "IDN not found!\n");
|
|
tlvdb_free(idndb);
|
|
tlvdb_free(cda_db);
|
|
emv_pk_free(iccpk);
|
|
emv_pk_free(ipk);
|
|
tlvdb_free(db);
|
|
return 2;
|
|
}
|
|
|
|
if (verbose) {
|
|
printf("IDN:\n");
|
|
dump_buffer(idn->value, idn->len, stdout, 0);
|
|
}
|
|
|
|
tlvdb_free(idndb);
|
|
tlvdb_free(cda_db);
|
|
emv_pk_free(iccpk);
|
|
emv_pk_free(ipk);
|
|
tlvdb_free(db);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int exec_cda_test(bool verbose) {
|
|
int ret;
|
|
fprintf(stdout, "\n");
|
|
|
|
ret = cda_test_raw(verbose);
|
|
if (ret) {
|
|
fprintf(stderr, "CDA raw test: failed\n");
|
|
return ret;
|
|
}
|
|
fprintf(stdout, "CDA raw test: passed\n");
|
|
|
|
ret = cda_test_pk(verbose);
|
|
if (ret) {
|
|
fprintf(stderr, "CDA test pk: failed\n");
|
|
return ret;
|
|
}
|
|
fprintf(stdout, "CDA test pk: passed\n");
|
|
|
|
return 0;
|
|
}
|