Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame^] | 1 | #include <libzrtpcpp/crypto/aesCFB.h>
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| 2 | #include <libzrtpcpp/crypto/twoCFB.h>
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| 3 | #include <libzrtpcpp/ZrtpConfigure.h>
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| 4 | #include <libzrtpcpp/ZrtpTextData.h>
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| 5 |
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| 6 | AlgorithmEnum::AlgorithmEnum(const AlgoTypes type, const char* name,
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| 7 | int32_t klen, const char* ra, encrypt_t en,
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| 8 | decrypt_t de, SrtpAlgorithms alId):
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| 9 | algoType(type) , algoName(name), keyLen(klen), readable(ra), encrypt(en),
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| 10 | decrypt(de), algoId(alId) {
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| 11 | }
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| 12 |
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| 13 | AlgorithmEnum::~AlgorithmEnum()
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| 14 | {
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| 15 | }
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| 16 |
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| 17 | const char* AlgorithmEnum::getName() {
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| 18 | return algoName.c_str();
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| 19 | }
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| 20 |
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| 21 | const char* AlgorithmEnum::getReadable() {
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| 22 | return readable.c_str();
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| 23 | }
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| 24 |
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| 25 | int AlgorithmEnum::getKeylen() {
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| 26 | return keyLen;
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| 27 | }
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| 28 |
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| 29 | SrtpAlgorithms AlgorithmEnum::getAlgoId() {
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| 30 | return algoId;
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| 31 | }
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| 32 |
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| 33 | encrypt_t AlgorithmEnum::getEncrypt() {
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| 34 | return encrypt;
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| 35 | }
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| 36 |
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| 37 | decrypt_t AlgorithmEnum::getDecrypt() {
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| 38 | return decrypt;
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| 39 | }
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| 40 |
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| 41 | AlgoTypes AlgorithmEnum::getAlgoType() {
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| 42 | return algoType;
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| 43 | }
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| 44 |
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| 45 | bool AlgorithmEnum::isValid() {
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| 46 | return (algoType != Invalid);
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| 47 | }
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| 48 |
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| 49 | static AlgorithmEnum invalidAlgo(Invalid, "", 0, "", NULL, NULL, None);
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| 50 |
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| 51 |
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| 52 | EnumBase::EnumBase(AlgoTypes a) : algoType(a) {
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| 53 | }
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| 54 |
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| 55 | EnumBase::~EnumBase() {}
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| 56 |
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| 57 | void EnumBase::insert(const char* name) {
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| 58 | if (!name)
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| 59 | return;
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| 60 | AlgorithmEnum* e = new AlgorithmEnum(algoType, name, 0, "", NULL, NULL, None);
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| 61 | algos.push_back(e);
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| 62 | }
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| 63 |
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| 64 | void EnumBase::insert(const char* name, int32_t klen, const char* ra,
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| 65 | encrypt_t enc, decrypt_t dec, SrtpAlgorithms alId) {
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| 66 | if (!name)
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| 67 | return;
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| 68 | AlgorithmEnum* e = new AlgorithmEnum(algoType, name, klen, ra, enc, dec, alId);
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| 69 | algos.push_back(e);
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| 70 | }
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| 71 |
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| 72 | int EnumBase::getSize() {
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| 73 | return algos.size();
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| 74 | }
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| 75 |
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| 76 | AlgoTypes EnumBase::getAlgoType() {
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| 77 | return algoType;
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| 78 | }
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| 79 |
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| 80 | AlgorithmEnum& EnumBase::getByName(const char* name) {
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| 81 | std::vector<AlgorithmEnum* >::iterator b = algos.begin();
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| 82 | std::vector<AlgorithmEnum* >::iterator e = algos.end();
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| 83 |
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| 84 | for (; b != e; b++) {
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| 85 | if (strncmp((*b)->getName(), name, 4) == 0) {
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| 86 | return *(*b);
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| 87 | }
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| 88 | }
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| 89 | return invalidAlgo;
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| 90 | }
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| 91 |
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| 92 | AlgorithmEnum& EnumBase::getByOrdinal(int ord) {
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| 93 | std::vector<AlgorithmEnum* >::iterator b = algos.begin();
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| 94 | std::vector<AlgorithmEnum* >::iterator e = algos.end();
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| 95 |
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| 96 | for (int i = 0; b != e; ++b) {
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| 97 | if (i == ord) {
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| 98 | return *(*b);
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| 99 | }
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| 100 | i++;
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| 101 | }
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| 102 | return invalidAlgo;
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| 103 | }
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| 104 |
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| 105 | int EnumBase::getOrdinal(AlgorithmEnum& algo) {
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| 106 | std::vector<AlgorithmEnum* >::iterator b = algos.begin();
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| 107 | std::vector<AlgorithmEnum* >::iterator e = algos.end();
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| 108 |
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| 109 | for (int i = 0; b != e; ++b) {
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| 110 | if (strncmp((*b)->getName(), algo.getName(), 4) == 0) {
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| 111 | return i;
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| 112 | }
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| 113 | i++;
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| 114 | }
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| 115 | return -1;
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| 116 | }
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| 117 |
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| 118 | std::list<std::string>* EnumBase::getAllNames() {
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| 119 | std::vector<AlgorithmEnum* >::iterator b = algos.begin();
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| 120 | std::vector<AlgorithmEnum* >::iterator e = algos.end();
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| 121 |
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| 122 | std::list<std::string>* strg = new std::list<std::string>();
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| 123 |
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| 124 | for (; b != e; b++) {
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| 125 | std::string s((*b)->getName());
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| 126 | strg->push_back(s);
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| 127 | }
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| 128 | return strg;
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| 129 | }
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| 130 |
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| 131 |
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| 132 | /**
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| 133 | * Set up the enumeration list for available hash algorithms
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| 134 | */
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| 135 | HashEnum::HashEnum() : EnumBase(HashAlgorithm) {
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| 136 | insert(s256);
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| 137 | insert(s384);
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| 138 | }
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| 139 |
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| 140 | HashEnum::~HashEnum() {}
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| 141 |
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| 142 | /**
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| 143 | * Set up the enumeration list for available symmetric cipher algorithms
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| 144 | */
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| 145 | SymCipherEnum::SymCipherEnum() : EnumBase(CipherAlgorithm) {
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| 146 | insert(aes3, 32, "AES-CM-256", aesCfbEncrypt, aesCfbDecrypt, Aes);
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| 147 | insert(aes1, 16, "AES-CM-128", aesCfbEncrypt, aesCfbDecrypt, Aes);
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| 148 | insert(two3, 32, "TWO-CM-256", twoCfbEncrypt, twoCfbDecrypt, TwoFish);
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| 149 | insert(two1, 16, "TWO-CM-128", twoCfbEncrypt, twoCfbDecrypt, TwoFish);
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| 150 | }
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| 151 |
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| 152 | SymCipherEnum::~SymCipherEnum() {}
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| 153 |
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| 154 | /**
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| 155 | * Set up the enumeration list for available public key algorithms
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| 156 | */
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| 157 | PubKeyEnum::PubKeyEnum() : EnumBase(PubKeyAlgorithm) {
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| 158 | insert(dh2k);
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| 159 | insert(dh3k);
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| 160 | insert(mult);
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| 161 | insert(ec25);
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| 162 | insert(ec38);
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| 163 | }
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| 164 |
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| 165 | PubKeyEnum::~PubKeyEnum() {}
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| 166 |
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| 167 | /**
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| 168 | * Set up the enumeration list for available SAS algorithms
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| 169 | */
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| 170 | SasTypeEnum::SasTypeEnum() : EnumBase(SasType) {
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| 171 | insert(b32);
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| 172 | }
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| 173 |
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| 174 | SasTypeEnum::~SasTypeEnum() {}
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| 175 |
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| 176 | /**
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| 177 | * Set up the enumeration list for available SRTP authentications
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| 178 | */
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| 179 | AuthLengthEnum::AuthLengthEnum() : EnumBase(AuthLength) {
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| 180 | insert(hs32, 32, "", NULL, NULL, Sha1);
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| 181 | insert(hs80, 80, "", NULL, NULL, Sha1);
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| 182 | insert(sk32, 32, "", NULL, NULL, Skein);
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| 183 | insert(sk64, 64, "", NULL, NULL, Skein);
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| 184 | }
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| 185 |
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| 186 | AuthLengthEnum::~AuthLengthEnum() {}
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| 187 |
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| 188 | /*
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| 189 | * Here the global accessible enumerations for all implemented algorithms.
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| 190 | */
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| 191 | HashEnum zrtpHashes;
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| 192 | SymCipherEnum zrtpSymCiphers;
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| 193 | PubKeyEnum zrtpPubKeys;
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| 194 | SasTypeEnum zrtpSasTypes;
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| 195 | AuthLengthEnum zrtpAuthLengths;
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| 196 |
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| 197 | /*
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| 198 | * The public methods are mainly a facade to the private methods.
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| 199 | */
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| 200 | ZrtpConfigure::ZrtpConfigure() : enableTrustedMitM(false), enableSasSignature(false), enableParanoidMode(false) {}
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| 201 |
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| 202 | ZrtpConfigure::~ZrtpConfigure() {}
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| 203 |
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| 204 | void ZrtpConfigure::setStandardConfig() {
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| 205 | clear();
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| 206 |
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| 207 | addAlgo(HashAlgorithm, zrtpHashes.getByName(s384));
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| 208 | addAlgo(HashAlgorithm, zrtpHashes.getByName(s256));
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| 209 |
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| 210 | addAlgo(CipherAlgorithm, zrtpSymCiphers.getByName(two3));
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| 211 | addAlgo(CipherAlgorithm, zrtpSymCiphers.getByName(aes3));
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| 212 | addAlgo(CipherAlgorithm, zrtpSymCiphers.getByName(two1));
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| 213 | addAlgo(CipherAlgorithm, zrtpSymCiphers.getByName(aes1));
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| 214 |
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| 215 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(ec25));
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| 216 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(dh3k));
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| 217 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(ec38));
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| 218 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(dh2k));
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| 219 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(mult));
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| 220 |
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| 221 | addAlgo(SasType, zrtpSasTypes.getByName(b32));
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| 222 |
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| 223 | addAlgo(AuthLength, zrtpAuthLengths.getByName(sk32));
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| 224 | addAlgo(AuthLength, zrtpAuthLengths.getByName(sk64));
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| 225 | addAlgo(AuthLength, zrtpAuthLengths.getByName(hs32));
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| 226 | addAlgo(AuthLength, zrtpAuthLengths.getByName(hs80));
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| 227 | }
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| 228 |
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| 229 | void ZrtpConfigure::setMandatoryOnly() {
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| 230 | clear();
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| 231 |
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| 232 | addAlgo(HashAlgorithm, zrtpHashes.getByName(s256));
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| 233 |
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| 234 | addAlgo(CipherAlgorithm, zrtpSymCiphers.getByName(aes1));
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| 235 |
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| 236 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(dh3k));
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| 237 | addAlgo(PubKeyAlgorithm, zrtpPubKeys.getByName(mult));
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| 238 |
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| 239 | addAlgo(SasType, zrtpSasTypes.getByName(b32));
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| 240 |
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| 241 | addAlgo(AuthLength, zrtpAuthLengths.getByName(hs32));
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| 242 | addAlgo(AuthLength, zrtpAuthLengths.getByName(hs80));
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| 243 |
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| 244 | }
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| 245 |
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| 246 | void ZrtpConfigure::clear() {
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| 247 | hashes.clear();
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| 248 | symCiphers.clear();
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| 249 | publicKeyAlgos.clear();
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| 250 | sasTypes.clear();
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| 251 | authLengths.clear();
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| 252 | }
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| 253 |
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| 254 | int32_t ZrtpConfigure::addAlgo(AlgoTypes algoType, AlgorithmEnum& algo) {
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| 255 |
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| 256 | return addAlgo(getEnum(algoType), algo);
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| 257 | }
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| 258 |
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| 259 | int32_t ZrtpConfigure::addAlgoAt(AlgoTypes algoType, AlgorithmEnum& algo, int32_t index) {
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| 260 |
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| 261 | return addAlgoAt(getEnum(algoType), algo, index);
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| 262 | }
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| 263 |
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| 264 | AlgorithmEnum& ZrtpConfigure::getAlgoAt(AlgoTypes algoType, int32_t index) {
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| 265 |
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| 266 | return getAlgoAt(getEnum(algoType), index);
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| 267 | }
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| 268 |
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| 269 | int32_t ZrtpConfigure::removeAlgo(AlgoTypes algoType, AlgorithmEnum& algo) {
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| 270 |
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| 271 | return removeAlgo(getEnum(algoType), algo);
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| 272 | }
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| 273 |
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| 274 | int32_t ZrtpConfigure::getNumConfiguredAlgos(AlgoTypes algoType) {
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| 275 |
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| 276 | return getNumConfiguredAlgos(getEnum(algoType));
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| 277 | }
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| 278 |
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| 279 | bool ZrtpConfigure::containsAlgo(AlgoTypes algoType, AlgorithmEnum& algo) {
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| 280 |
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| 281 | return containsAlgo(getEnum(algoType), algo);
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| 282 | }
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| 283 |
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| 284 | void ZrtpConfigure::printConfiguredAlgos(AlgoTypes algoType) {
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| 285 |
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| 286 | printConfiguredAlgos(getEnum(algoType));
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| 287 | }
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| 288 |
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| 289 | /*
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| 290 | * The next methods are the private methods that implement the real
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| 291 | * details.
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| 292 | */
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| 293 | AlgorithmEnum& ZrtpConfigure::getAlgoAt(std::vector<AlgorithmEnum* >& a, int32_t index) {
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| 294 |
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| 295 | if (index >= (int)a.size())
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| 296 | return invalidAlgo;
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| 297 |
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| 298 | std::vector<AlgorithmEnum* >::iterator b = a.begin();
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| 299 | std::vector<AlgorithmEnum* >::iterator e = a.end();
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| 300 |
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| 301 | for (int i = 0; b != e; ++b) {
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| 302 | if (i == index) {
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| 303 | return *(*b);
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| 304 | }
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| 305 | i++;
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| 306 | }
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| 307 | return invalidAlgo;
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| 308 | }
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| 309 |
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| 310 | int32_t ZrtpConfigure::addAlgo(std::vector<AlgorithmEnum* >& a, AlgorithmEnum& algo) {
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| 311 | int size = (int)a.size();
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| 312 | if (size >= maxNoOfAlgos)
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| 313 | return -1;
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| 314 |
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| 315 | if (!algo.isValid())
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| 316 | return -1;
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| 317 |
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| 318 | if (containsAlgo(a, algo))
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| 319 | return (maxNoOfAlgos - size);
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| 320 |
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| 321 | a.push_back(&algo);
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| 322 | return (maxNoOfAlgos - (int)a.size());
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| 323 | }
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| 324 |
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| 325 | int32_t ZrtpConfigure::addAlgoAt(std::vector<AlgorithmEnum* >& a, AlgorithmEnum& algo, int32_t index) {
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| 326 | if (index >= maxNoOfAlgos)
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| 327 | return -1;
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| 328 |
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| 329 | int size = (int)a.size();
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| 330 |
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| 331 | if (!algo.isValid())
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| 332 | return -1;
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| 333 |
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| 334 | // a[index] = &algo;
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| 335 |
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| 336 | if (index >= size) {
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| 337 | a.push_back(&algo);
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| 338 | return maxNoOfAlgos - (int)a.size();
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| 339 | }
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| 340 | std::vector<AlgorithmEnum* >::iterator b = a.begin();
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| 341 | std::vector<AlgorithmEnum* >::iterator e = a.end();
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| 342 |
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| 343 | for (int i = 0; b != e; ++b) {
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| 344 | if (i == index) {
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| 345 | a.insert(b, &algo);
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| 346 | break;
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| 347 | }
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| 348 | i++;
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| 349 | }
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| 350 | return (maxNoOfAlgos - (int)a.size());
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| 351 | }
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| 352 |
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| 353 | int32_t ZrtpConfigure::removeAlgo(std::vector<AlgorithmEnum* >& a, AlgorithmEnum& algo) {
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| 354 |
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| 355 | if ((int)a.size() == 0 || !algo.isValid())
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| 356 | return maxNoOfAlgos;
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| 357 |
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| 358 | std::vector<AlgorithmEnum* >::iterator b = a.begin();
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| 359 | std::vector<AlgorithmEnum* >::iterator e = a.end();
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| 360 |
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| 361 | for (; b != e; ++b) {
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| 362 | if (strcmp((*b)->getName(), algo.getName()) == 0) {
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| 363 | a.erase(b);
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| 364 | break;
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| 365 | }
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| 366 | }
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| 367 | return (maxNoOfAlgos - (int)a.size());
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| 368 | }
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| 369 |
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| 370 | int32_t ZrtpConfigure::getNumConfiguredAlgos(std::vector<AlgorithmEnum* >& a) {
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| 371 | return (int32_t)a.size();
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| 372 | }
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| 373 |
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| 374 | bool ZrtpConfigure::containsAlgo(std::vector<AlgorithmEnum* >& a, AlgorithmEnum& algo) {
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| 375 |
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| 376 | if ((int)a.size() == 0 || !algo.isValid())
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| 377 | return false;
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| 378 |
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| 379 | std::vector<AlgorithmEnum* >::iterator b = a.begin();
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| 380 | std::vector<AlgorithmEnum* >::iterator e = a.end();
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| 381 |
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| 382 | for (; b != e; ++b) {
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| 383 | if (strcmp((*b)->getName(), algo.getName()) == 0) {
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| 384 | return true;
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| 385 | }
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| 386 | }
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| 387 | return false;
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| 388 | }
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| 389 |
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| 390 | void ZrtpConfigure::printConfiguredAlgos(std::vector<AlgorithmEnum* >& a) {
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| 391 |
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| 392 | std::vector<AlgorithmEnum* >::iterator b = a.begin();
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| 393 | std::vector<AlgorithmEnum* >::iterator e = a.end();
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| 394 |
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| 395 | for (; b != e; ++b) {
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| 396 | printf("print configured: name: %s\n", (*b)->getName());
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| 397 | }
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| 398 | }
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| 399 |
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| 400 | std::vector<AlgorithmEnum* >& ZrtpConfigure::getEnum(AlgoTypes algoType) {
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| 401 |
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| 402 | switch(algoType) {
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| 403 | case HashAlgorithm:
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| 404 | return hashes;
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| 405 | break;
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| 406 |
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| 407 | case CipherAlgorithm:
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| 408 | return symCiphers;
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| 409 | break;
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| 410 |
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| 411 | case PubKeyAlgorithm:
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| 412 | return publicKeyAlgos;
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| 413 | break;
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| 414 |
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| 415 | case SasType:
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| 416 | return sasTypes;
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| 417 | break;
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| 418 |
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| 419 | case AuthLength:
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| 420 | return authLengths;
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| 421 | break;
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| 422 |
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| 423 | default:
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| 424 | break;
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| 425 | }
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| 426 | return hashes;
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| 427 | }
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| 428 |
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| 429 | void ZrtpConfigure::setTrustedMitM(bool yesNo) {
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| 430 | enableTrustedMitM = yesNo;
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| 431 | }
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| 432 |
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| 433 | bool ZrtpConfigure::isTrustedMitM() {
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| 434 | return enableTrustedMitM;
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| 435 | }
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| 436 |
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| 437 | void ZrtpConfigure::setSasSignature(bool yesNo) {
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| 438 | enableSasSignature = yesNo;
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| 439 | }
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| 440 |
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| 441 | bool ZrtpConfigure::isSasSignature() {
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| 442 | return enableSasSignature;
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| 443 | }
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| 444 |
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| 445 | void ZrtpConfigure::setParanoidMode(bool yesNo) {
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| 446 | enableParanoidMode = yesNo;
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| 447 | }
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| 448 |
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| 449 | bool ZrtpConfigure::isParanoidMode() {
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| 450 | return enableParanoidMode;
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| 451 | }
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| 452 |
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| 453 | #if 0
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| 454 | ZrtpConfigure config;
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| 455 |
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| 456 | main() {
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| 457 | printf("Start\n");
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| 458 | printf("size: %d\n", zrtpHashes.getSize());
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| 459 | AlgorithmEnum e = zrtpHashes.getByName("S256");
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| 460 | printf("algo name: %s\n", e.getName());
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| 461 | printf("algo type: %d\n", e.getAlgoType());
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| 462 |
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| 463 | std::list<std::string>* names = zrtpHashes.getAllNames();
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| 464 | printf("size of name list: %d\n", names->size());
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| 465 | printf("first name: %s\n", names->front().c_str());
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| 466 | printf("last name: %s\n", names->back().c_str());
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| 467 |
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| 468 | printf("free slots: %d (expected 6)\n", config.addAlgo(HashAlgorithm, e));
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| 469 |
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| 470 | AlgorithmEnum e1(HashAlgorithm, "SHA384");
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| 471 | printf("free slots: %d (expected 5)\n", config.addAlgoAt(HashAlgorithm, e1, 0));
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| 472 | AlgorithmEnum e2 = config.getAlgoAt(HashAlgorithm, 0);
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| 473 | printf("algo name: %s (expected SHA384)\n", e2.getName());
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| 474 | printf("Num of configured algos: %d (expected 2)\n", config.getNumConfiguredAlgos(HashAlgorithm));
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| 475 | config.printConfiguredAlgos(HashAlgorithm);
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| 476 | printf("free slots: %d (expected 6)\n", config.removeAlgo(HashAlgorithm, e2));
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| 477 | e2 = config.getAlgoAt(HashAlgorithm, 0);
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| 478 | printf("algo name: %s (expected SHA256)\n", e2.getName());
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| 479 |
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| 480 | printf("clearing config\n");
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| 481 | config.clear();
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| 482 | printf("size: %d\n", zrtpHashes.getSize());
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| 483 | e = zrtpHashes.getByName("S256");
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| 484 | printf("algo name: %s\n", e.getName());
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| 485 | printf("algo type: %d\n", e.getAlgoType());
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| 486 |
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| 487 | }
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| 488 |
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| 489 | #endif
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| 490 | /** EMACS **
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| 491 | * Local variables:
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| 492 | * mode: c++
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| 493 | * c-default-style: ellemtel
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| 494 | * c-basic-offset: 4
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| 495 | * End:
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| 496 | */
|