本文整理汇总了C++中ec_point::resize方法的典型用法代码示例。如果您正苦于以下问题：C++ ec_point::resize方法的具体用法？C++ ec_point::resize怎么用？C++ ec_point::resize使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ec_point的用法示例。
在下文中一共展示了ec_point::resize方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: SecretToPublicKey
int SecretToPublicKey(const ec_secret& secret, ec_point& out)
{
// -- public key = private * G
int rv = 0;
EC_GROUP* ecgrp = EC_GROUP_new_by_curve_name(NID_secp256k1);
if (!ecgrp)
{
LogPrintf("SecretToPublicKey(): EC_GROUP_new_by_curve_name failed.\n");
return 1;
};
BIGNUM* bnIn = BN_bin2bn(&secret.e[0], ec_secret_size, BN_new());
if (!bnIn)
{
EC_GROUP_free(ecgrp);
LogPrintf("SecretToPublicKey(): BN_bin2bn failed\n");
return 1;
};
EC_POINT* pub = EC_POINT_new(ecgrp);
EC_POINT_mul(ecgrp, pub, bnIn, NULL, NULL, NULL);
BIGNUM* bnOut = EC_POINT_point2bn(ecgrp, pub, POINT_CONVERSION_COMPRESSED, BN_new(), NULL);
if (!bnOut)
{
LogPrintf("SecretToPublicKey(): point2bn failed\n");
rv = 1;
} else
{
out.resize(ec_compressed_size);
if (BN_num_bytes(bnOut) != (int) ec_compressed_size
|| BN_bn2bin(bnOut, &out[0]) != (int) ec_compressed_size)
{
LogPrintf("SecretToPublicKey(): bnOut incorrect length.\n");
rv = 1;
};
BN_free(bnOut);
};
EC_POINT_free(pub);
BN_free(bnIn);
EC_GROUP_free(ecgrp);
return rv;
};示例2: getOldKeyImage
int getOldKeyImage(CPubKey &publicKey, ec_point &keyImage)
{
// - PublicKey * Hash(PublicKey)
if (publicKey.size() != EC_COMPRESSED_SIZE)
return errorN(1, "%s: Invalid publicKey.", __func__);
int rv = 0;
uint256 pkHash = publicKey.GetHash();
BN_CTX_start(bnCtx);
BIGNUM *bnTmp = BN_CTX_get(bnCtx);
EC_POINT *ptPk = NULL;
// Hash to BIGNUM
if (!BN_bin2bn(pkHash.begin(), EC_SECRET_SIZE, bnTmp)
&& (rv = errorN(1, "%s: BN_bin2bn failed.", __func__)))
goto End;
// PublicKey point
if (!(ptPk = EC_POINT_new(ecGrp))
&& (rv = errorN(1, "%s: EC_POINT_new failed.", __func__)))
goto End;
if(!EC_POINT_oct2point(ecGrp, ptPk, publicKey.begin(), EC_COMPRESSED_SIZE, bnCtx)
&& (rv = errorN(1, "%s: EC_POINT_oct2point failed.", __func__)))
goto End;
// PublicKey * Hash(PublicKey)
if (!EC_POINT_mul(ecGrp, ptPk, NULL, ptPk, bnTmp, bnCtx)
&& (rv = errorN(1, "%s: EC_POINT_mul failed.", __func__)))
goto End;
try { keyImage.resize(EC_COMPRESSED_SIZE); } catch (std::exception& e)
{
LogPrintf("%s: keyImage.resize threw: %s.\n", __func__, e.what());
rv = 1; goto End;
}
// Point to BIGNUM to bin
if (!(EC_POINT_point2bn(ecGrp, ptPk, POINT_CONVERSION_COMPRESSED, bnTmp, bnCtx))
||BN_num_bytes(bnTmp) != (int) EC_COMPRESSED_SIZE
||BN_bn2bin(bnTmp, &keyImage[0]) != (int) EC_COMPRESSED_SIZE)
rv = errorN(1, "%s: point -> keyImage failed.", __func__);
End:
EC_POINT_free(ptPk);
BN_CTX_end(bnCtx);
return 0;
}示例3: generateKeyImage
int generateKeyImage(ec_point &publicKey, ec_secret secret, ec_point &keyImage)
{
// - keyImage = secret * hash(publicKey) * G
if (publicKey.size() != EC_COMPRESSED_SIZE)
return errorN(1, "%s: Invalid publicKey.", __func__);
BN_CTX_start(bnCtx);
int rv = 0;
BIGNUM *bnTmp = BN_CTX_get(bnCtx);
BIGNUM *bnSec = BN_CTX_get(bnCtx);
EC_POINT *hG = NULL;
if (!(hG = EC_POINT_new(ecGrp))
&& (rv = errorN(1, "%s: EC_POINT_new failed.", __func__)))
goto End;
if (hashToEC(&publicKey[0], publicKey.size(), bnTmp, hG)
&& (rv = errorN(1, "%s: hashToEC failed.", __func__)))
goto End;
if (!(BN_bin2bn(&secret.e[0], EC_SECRET_SIZE, bnSec))
&& (rv = errorN(1, "%s: BN_bin2bn failed.", __func__)))
goto End;
if (!EC_POINT_mul(ecGrp, hG, NULL, hG, bnSec, bnCtx)
&& (rv = errorN(1, "%s: kimg EC_POINT_mul failed.", __func__)))
goto End;
try { keyImage.resize(EC_COMPRESSED_SIZE); } catch (std::exception& e)
{
LogPrintf("%s: keyImage.resize threw: %s.\n", __func__, e.what());
rv = 1; goto End;
}
if ((!(EC_POINT_point2bn(ecGrp, hG, POINT_CONVERSION_COMPRESSED, bnTmp, bnCtx))
|| BN_num_bytes(bnTmp) != (int) EC_COMPRESSED_SIZE
|| BN_bn2bin(bnTmp, &keyImage[0]) != (int) EC_COMPRESSED_SIZE)
&& (rv = errorN(1, "%s: point -> keyImage failed.", __func__)))
goto End;
if (fDebugRingSig)
LogPrintf("keyImage %s\n", HexStr(keyImage).c_str());
End:
EC_POINT_free(hG);
BN_CTX_end(bnCtx);
return rv;
};示例4: StealthSecret
//.........这里部分代码省略.........
if (!(bnQ = BN_bin2bn(&pubkey[0], pubkey.size(), BN_new())))
{
printf("StealthSecret(): bnQ BN_bin2bn failed\n");
rv = 4;
goto End;
};
if (!(Q = EC_POINT_bn2point(ecgrp, bnQ, NULL, bnCtx)))
{
printf("StealthSecret(): Q EC_POINT_bn2point failed\n");
rv = 5;
goto End;
};
// -- eQ
// EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n, const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
// EC_POINT_mul calculates the value generator * n + q * m and stores the result in r. The value n may be NULL in which case the result is just q * m.
if (!EC_POINT_mul(ecgrp, Q, NULL, Q, bnEphem, bnCtx))
{
printf("StealthSecret(): eQ EC_POINT_mul failed\n");
rv = 6;
goto End;
};
if (!(bnOutQ = EC_POINT_point2bn(ecgrp, Q, POINT_CONVERSION_COMPRESSED, BN_new(), bnCtx)))
{
printf("StealthSecret(): Q EC_POINT_bn2point failed\n");
rv = 7;
goto End;
};
vchOutQ.resize(ec_compressed_size);
if (BN_num_bytes(bnOutQ) != (int) ec_compressed_size
|| BN_bn2bin(bnOutQ, &vchOutQ[0]) != (int) ec_compressed_size)
{
printf("StealthSecret(): bnOutQ incorrect length.\n");
rv = 8;
goto End;
};
SHA256(&vchOutQ[0], vchOutQ.size(), &sharedSOut.e[0]);
if (!(bnc = BN_bin2bn(&sharedSOut.e[0], ec_secret_size, BN_new())))
{
printf("StealthSecret(): BN_bin2bn failed\n");
rv = 9;
goto End;
};
// -- cG
if (!(C = EC_POINT_new(ecgrp)))
{
printf("StealthSecret(): C EC_POINT_new failed\n");
rv = 10;
goto End;
};
if (!EC_POINT_mul(ecgrp, C, bnc, NULL, NULL, bnCtx))
{
printf("StealthSecret(): C EC_POINT_mul failed\n");
rv = 11;
goto End;
};