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Util helper func simplification. (#203)

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This commit is contained in:
Ravin Perera
2020-12-23 21:49:13 +05:30
committed by GitHub
parent 8dc20bdab0
commit c25ebe66f4
17 changed files with 205 additions and 416 deletions
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63
src/crypto.cpp
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@@ -28,10 +28,10 @@ namespace crypto
// Generate key pair using libsodium default algorithm.
// Currently using ed25519. So append prefix byte to represent that.
pubkey.resize(PFXD_PUBKEY_BYTES);
pubkey.resize(crypto_sign_ed25519_PUBLICKEYBYTES + 1);
pubkey[0] = KEYPFX_ed25519;
seckey.resize(PFXD_SECKEY_BYTES);
seckey.resize(crypto_sign_ed25519_SECRETKEYBYTES + 1);
seckey[0] = KEYPFX_ed25519;
crypto_sign_ed25519_keypair(
@@ -62,33 +62,6 @@ namespace crypto
return sig;
}
/**
* Returns the hex signature string for a message.
*
* @param msg Message bytes to sign.
* @param private_key_hex hex private key string.
* @return hex signature string.
*/
std::string sign_hex(std::string_view msg, std::string_view private_key_hex)
{
//Decode hex string and generate the signature using libsodium.
unsigned char private_key[PFXD_SECKEY_BYTES];
util::hex2bin(private_key, PFXD_SECKEY_BYTES, private_key_hex);
unsigned char sig[crypto_sign_ed25519_BYTES];
crypto_sign_ed25519_detached(
sig,
NULL,
reinterpret_cast<const unsigned char *>(msg.data()),
msg.length(),
private_key + 1); // +1 to skip prefix byte.
std::string sighex;
util::bin2hex(sighex, sig, crypto_sign_ed25519_BYTES);
return sighex;
}
/**
* Verifies the given signature bytes for the message.
*
@@ -106,31 +79,6 @@ namespace crypto
reinterpret_cast<const unsigned char *>(pubkey.data() + 1)); // +1 to skip prefix byte.
}
/**
* Verifies the given hex signature for the message.
*
* @param msg hex message string.
* @param sighex hex signature string.
* @param pubkeyhex hex public key.
* @return 0 for successful verification. -1 for failure.
*/
int verify_hex(std::string_view msg, std::string_view sighex, std::string_view pubkeyhex)
{
//Decode hex string and verify the signature using libsodium.
unsigned char decoded_pubkey[PFXD_PUBKEY_BYTES];
util::hex2bin(decoded_pubkey, PFXD_PUBKEY_BYTES, pubkeyhex);
unsigned char decoded_sig[crypto_sign_ed25519_BYTES];
util::hex2bin(decoded_sig, crypto_sign_ed25519_BYTES, sighex);
return crypto_sign_ed25519_verify_detached(
decoded_sig,
reinterpret_cast<const unsigned char *>(msg.data()),
msg.length(),
decoded_pubkey + 1); // +1 to skip prefix byte.
}
/**
* Generate random bytes of specified length.
*/
@@ -237,12 +185,7 @@ namespace crypto
uuid[6] = (uuid[8] & 0x0F) | 0x40;
uuid[8] = (uuid[8] & 0xBF) | 0x80;
std::string hex;
util::bin2hex(
hex,
reinterpret_cast<const unsigned char *>(rand_bytes.data()),
rand_bytes.length());
const std::string hex = util::to_hex(rand_bytes);
return hex.substr(0, 8) + "-" + hex.substr(8, 4) + "-" + hex.substr(12, 4) + "-" + hex.substr(16, 4) + "-" + hex.substr(20);
}