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add fork of libsam3

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add funtion to get i2p certificate crypto algo names
This commit is contained in:
sehraf 2020-10-26 21:45:03 +01:00
parent 130d846e47
commit 76f0678820
No known key found for this signature in database
GPG key ID: DF09F6EAE356B2C6
25 changed files with 5858 additions and 7 deletions
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113
libretroshare/src/util/i2pcommon.cpp
View file

@ -70,13 +70,14 @@ std::string publicKeyFromPrivate(std::string const &priv)
uint8_t certType = 0;
uint16_t len = 0;
uint16_t signingKeyType = 0;
uint16_t cryptKey = 0;
uint16_t cryptKeyType = 0;
// only used for easy break
do {
try {
// jump to certificate
p += publicKeyLen;
// try to read type and length
certType = *p++;
len = readTwoBytesBE(p);
@ -87,7 +88,7 @@ std::string publicKeyFromPrivate(std::string const &priv)
/*
* CertType.Null
* type null is followed by 0x00 0x00 <END>
* so has to be 0!
* so len has to be 0!
*/
RS_DBG("cert is CertType.Null");
publicKeyLen += 3; // add 0x00 0x00 0x00
@ -119,7 +120,7 @@ std::string publicKeyFromPrivate(std::string const &priv)
// likely 7
signingKeyType = readTwoBytesBE(p);
RS_DBG("signing pubkey type ", certType);
RS_DBG("signing pubkey type ", signingKeyType);
if (signingKeyType >= 3 && signingKeyType <= 6) {
RS_DBG("signing pubkey type ", certType, " has oversize");
// calculate oversize
@ -137,18 +138,18 @@ std::string publicKeyFromPrivate(std::string const &priv)
return std::string();
}
publicKeyLen += values.first - 128; // 128 = default DSA key length = the space than can be used before the key must be splitted
publicKeyLen += values.first - 128; // 128 = default DSA key length = the space that can be used before the key must be splitted
}
// Crypto Public Key
// likely 0
cryptKey = readTwoBytesBE(p);
RS_DBG("crypto pubkey type ", cryptKey);
cryptKeyType = readTwoBytesBE(p);
RS_DBG("crypto pubkey type ", cryptKeyType);
// info: these are all smaller than the default 256 bytes, so no oversize calculation is needed
break;
} catch (const std::out_of_range &e) {
RS_DBG("hit exception! ", e.what());
RS_DBG("hit an exception! ", e.what());
return std::string();
}
} while(false);
@ -160,4 +161,102 @@ std::string publicKeyFromPrivate(std::string const &priv)
return pub;
}
bool getKeyTypes(const std::string &key, std::string &signingKey, std::string &cryptoKey)
{
// creat a copy to work on, need to convert it to standard base64
auto key_copy(key);
std::replace(key_copy.begin(), key_copy.end(), '~', '/');
// replacing the - with a + is not necessary, as RsBase64 can handle base64url encoding, too
// std::replace(copy.begin(), copy.end(), '-', '+');
// get raw data
std::vector<uint8_t> data;
RsBase64::decode(key_copy, data);
auto p = data.cbegin();
constexpr size_t publicKeyLen = 256 + 128; // default length (bytes)
uint8_t certType = 0;
uint16_t signingKeyType = 0;
uint16_t cryptKeyType = 0;
// try to read types
try {
// jump to certificate
p += publicKeyLen;
// try to read type and skip length
certType = *p++;
p += 2;
// only 0 and 5 are used / valid at this point
// check for == 0
if (certType == static_cast<typename std::underlying_type<CertType>::type>(CertType::Null)) {
RS_DBG("cert is CertType.Null");
signingKey = "DSA_SHA1";
cryptoKey = "ElGamal";
return true;
}
// check for != 5
if (certType != static_cast<typename std::underlying_type<CertType>::type>(CertType::Key)) {
// unsupported
RS_DBG("cert type ", certType, " is unsupported");
return false;
}
RS_DBG("cert is CertType.Key");
// Signing Public Key
// likely 7
signingKeyType = readTwoBytesBE(p);
RS_DBG("signing pubkey type ", signingKeyType);
// Crypto Public Key
// likely 0
cryptKeyType = readTwoBytesBE(p);
RS_DBG("crypto pubkey type ", cryptKeyType);
} catch (const std::out_of_range &e) {
RS_DBG("hit an exception! ", e.what());
return false;
}
// now convert to string (this would be easier with c++17)
#define HELPER(a, b, c) \
case static_cast<typename std::underlying_type<a>::type>(a::c): \
b = "c"; \
break;
switch (signingKeyType) {
HELPER(SigningKeyType, signingKey, DSA_SHA1)
HELPER(SigningKeyType, signingKey, ECDSA_SHA256_P256)
HELPER(SigningKeyType, signingKey, ECDSA_SHA384_P384)
HELPER(SigningKeyType, signingKey, ECDSA_SHA512_P521)
HELPER(SigningKeyType, signingKey, RSA_SHA256_2048)
HELPER(SigningKeyType, signingKey, RSA_SHA384_3072)
HELPER(SigningKeyType, signingKey, RSA_SHA512_4096)
HELPER(SigningKeyType, signingKey, EdDSA_SHA512_Ed25519)
HELPER(SigningKeyType, signingKey, EdDSA_SHA512_Ed25519ph)
HELPER(SigningKeyType, signingKey, RedDSA_SHA512_Ed25519)
default:
RsWarn("unkown signing key type:", signingKeyType);
return false;
}
switch (cryptKeyType) {
HELPER(CryptoKeyType, cryptoKey, ElGamal)
HELPER(CryptoKeyType, cryptoKey, P256)
HELPER(CryptoKeyType, cryptoKey, P384)
HELPER(CryptoKeyType, cryptoKey, P521)
HELPER(CryptoKeyType, cryptoKey, X25519)
default:
RsWarn("unkown crypto key type:", cryptKeyType);
return false;
}
#undef HELPER
return true;
}
} // namespace i2p

9
libretroshare/src/util/i2pcommon.h
View file

@ -208,6 +208,15 @@ std::string keyToBase32Addr(const std::string &key);
*/
std::string publicKeyFromPrivate(const std::string &priv);
/**
* @brief getKeyTypes returns the name of the utilized algorithms used by the key
* @param key public key (private works, too)
* @param signingKey name of the signing key, e.g. DSA_SHA1
* @param cryptoKey name of the crpyto key, e.g. ElGamal
* @return true on success, false otherwise
*/
bool getKeyTypes(const std::string &key, std::string &signingKey, std::string &cryptoKey);
} // namespace i2p
#endif // I2PCOMMON_H