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Switched to specific libsodium crypto funcs.

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This commit is contained in:
Ravin Perera
2019-11-01 12:04:23 +05:30
parent b598025346
commit 7b78387cef
2 changed files with 24 additions and 18 deletions
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38
src/crypto.cpp
View File

@@ -21,7 +21,7 @@ int init()
return 0;
}
/**l
/**
* Generates a signing key pair using libsodium and assigns them to the provided strings.
*/
void generate_signing_keys(std::string &pubkey, std::string &seckey)
@@ -35,7 +35,7 @@ void generate_signing_keys(std::string &pubkey, std::string &seckey)
seckey.resize(PFXD_SECKEY_BYTES);
seckey[0] = KEYPFX_ed25519;
crypto_sign_keypair(
crypto_sign_ed25519_keypair(
reinterpret_cast<unsigned char *>(pubkey.data() + 1), // +1 to skip the prefix byte.
reinterpret_cast<unsigned char *>(seckey.data() + 1)); // +1 to skip the prefix byte.
}
@@ -52,8 +52,8 @@ std::string sign(std::string_view msg, std::string_view seckey)
//Generate the signature using libsodium.
std::string sig;
sig.resize(crypto_sign_BYTES);
crypto_sign_detached(
sig.resize(crypto_sign_ed25519_BYTES);
crypto_sign_ed25519_detached(
reinterpret_cast<unsigned char *>(sig.data()),
NULL,
reinterpret_cast<const unsigned char *>(msg.data()),
@@ -77,8 +77,8 @@ std::string sign_hex(std::string_view msg, std::string_view seckeyhex)
unsigned char seckey[PFXD_SECKEY_BYTES];
util::hex2bin(seckey, PFXD_SECKEY_BYTES, seckeyhex);
unsigned char sig[crypto_sign_BYTES];
crypto_sign_detached(
unsigned char sig[crypto_sign_ed25519_BYTES];
crypto_sign_ed25519_detached(
sig,
NULL,
reinterpret_cast<const unsigned char *>(msg.data()),
@@ -86,7 +86,7 @@ std::string sign_hex(std::string_view msg, std::string_view seckeyhex)
seckey + 1); // +1 to skip prefix byte.
std::string sighex;
util::bin2hex(sighex, sig, crypto_sign_BYTES);
util::bin2hex(sighex, sig, crypto_sign_ed25519_BYTES);
return sighex;
}
@@ -100,7 +100,7 @@ std::string sign_hex(std::string_view msg, std::string_view seckeyhex)
*/
int verify(std::string_view msg, std::string_view sig, std::string_view pubkey)
{
return crypto_sign_verify_detached(
return crypto_sign_ed25519_verify_detached(
reinterpret_cast<const unsigned char *>(sig.data()),
reinterpret_cast<const unsigned char *>(msg.data()),
msg.length(),
@@ -122,10 +122,10 @@ int verify_hex(std::string_view msg, std::string_view sighex, std::string_view p
unsigned char decoded_pubkey[PFXD_PUBKEY_BYTES];
util::hex2bin(decoded_pubkey, PFXD_PUBKEY_BYTES, pubkeyhex);
unsigned char decoded_sig[crypto_sign_BYTES];
util::hex2bin(decoded_sig, crypto_sign_BYTES, sighex);
unsigned char decoded_sig[crypto_sign_ed25519_BYTES];
util::hex2bin(decoded_sig, crypto_sign_ed25519_BYTES, sighex);
return crypto_sign_verify_detached(
return crypto_sign_ed25519_verify_detached(
decoded_sig,
reinterpret_cast<const unsigned char *>(msg.data()),
msg.length(),
@@ -133,16 +133,22 @@ int verify_hex(std::string_view msg, std::string_view sighex, std::string_view p
}
/**
* Generate hash for message prepend with prefix before hashing.
*
* Generate blake2b hash for a given message.
* @param data String to hash.
* @return The hash of the given string.
* @return The blake2b hash of the given string.
*/
std::string get_hash(std::string_view data)
{
unsigned char hashchars[crypto_generichash_BYTES];
crypto_generichash(hashchars, sizeof hashchars, (unsigned char *)data.data(), data.length(), NULL, 0);
return std::string(reinterpret_cast<char *>(hashchars), crypto_generichash_BYTES);
crypto_generichash_blake2b(
hashchars,
sizeof hashchars,
reinterpret_cast<const unsigned char *>(data.data()),
data.length(),
NULL, 0);
return std::string(reinterpret_cast<char *>(hashchars), crypto_generichash_blake2b_BYTES);
}
} // namespace crypto

4
src/crypto.hpp
View File

@@ -13,9 +13,9 @@ namespace crypto
// Prefix byte to append to ed25519 keys.
static unsigned char KEYPFX_ed25519 = 0xED;
// Prefixed public key bytes.
static size_t PFXD_PUBKEY_BYTES = crypto_sign_PUBLICKEYBYTES + 1;
static size_t PFXD_PUBKEY_BYTES = crypto_sign_ed25519_PUBLICKEYBYTES + 1;
// Prefixed secret key bytes.
static size_t PFXD_SECKEY_BYTES = crypto_sign_SECRETKEYBYTES + 1;
static size_t PFXD_SECKEY_BYTES = crypto_sign_ed25519_SECRETKEYBYTES + 1;
int init();