使用安全变换生成RSA签名并使用OpenSSL/C++进行验证

然后,客户机将base64编码的证书和签名数据(base64编码)发送回服务器。Linux服务器使用OpenSSL库(从证书中获取公钥)来验证签名的数据。

我面临的问题是服务器无法验证签名数据,而对于windows客户机,服务器可以验证签名数据。

std::string osxPrivateKey::signData(const uint8_t* pData, uint32_t nDataSize, vector<uint8_t>& aSignature) {
    const char* str = (const char*)pData;
    unsigned char *result = new unsigned char[CC_SHA256_DIGEST_LENGTH];
    CC_SHA256(str, strlen(str), result);

    CFDataRef myData = CFDataCreate(NULL, result, CC_SHA256_DIGEST_LENGTH);
    CFErrorRef error;

    osxObject<SecTransformRef> signer;
    SecTransformRef signerRef = SecSignTransformCreate(m_oKey.get(), &error);
    signer.set(signerRef);

    //SecTransformSetAttribute(signer.get(), kSecTransformDebugAttributeName, kCFBooleanTrue, &error);
    SecTransformSetAttribute(signer.get(), kSecTransformInputAttributeName, myData, &error);
    //SecTransformSetAttribute(signer.get(), kSecInputIsAttributeName , kSecInputIsPlainText, &error);
    SecTransformSetAttribute(signer.get(), kSecInputIsAttributeName , kSecInputIsDigest, &error);
    //SecTransformSetAttribute(signer.get(), kSecInputIsAttributeName , kSecInputIsRaw, &error);
    SecTransformSetAttribute(signer.get(), kSecPaddingKey, kSecPaddingPKCS1Key, &error);
    //SecTransformSetAttribute(signer.get(), kSecPaddingKey, kSecPaddingPKCS5Key, &error);
    SecTransformSetAttribute(signer.get(), kSecEncodeLineLengthAttribute, kSecLineLength64, &error);
    SecTransformSetAttribute(signer.get(), kSecDigestTypeAttribute, kSecDigestSHA2, NULL);

    int digestLength = 256;
    CFNumberRef dLen = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &digestLength);
    SecTransformSetAttribute(signer.get(), kSecDigestLengthAttribute, dLen, &error);
    CFRelease(dLen);

    CFDataRef signature = (CFDataRef)SecTransformExecute(signer.get(), &error);


    unsigned char* signData = new unsigned char[1024];
    int size = CFDataGetLength(signature);
    CFDataGetBytes(signature, CFRangeMake(0,CFDataGetLength(signature)), (UInt8*)(signData));

    char* encodeBase64SignData = new char[1024];
    //internal library to convert binary to base64 encoding
    hc::encodeBase64((const char*)signData, size, encodeBase64SignData, 1023);
    encodeBase64SignData[1023] = '\0';

    delete encodeBase64SignData;
    delete signData;

    return string(encodeBase64SignData);
}

在服务器上,以下代码用于验证签名

bool verifySignature(const EVP_PKEY * pkey, const BLOB & data, const BLOB & signature, size_t signatureLen, DSStr & strErr)
{
    bool     result = false;
    EVP_MD_CTX* ctx = NULL;
    {// scope
        OSSL_CHECK(ctx = EVP_MD_CTX_create());
        const EVP_MD* md = NULL;;
        OSSL_CHECK(md = EVP_get_digestbyname("SHA256"));
        OSSL_CHECK(EVP_DigestInit_ex(ctx, md, NULL) == 1);
        OSSL_CHECK(EVP_DigestVerifyInit(ctx, NULL, md, NULL, (EVP_PKEY*)pkey) == 1);
        if (EVP_PKEY_id((EVP_PKEY*)pkey) == EVP_PKEY_RSA) {
            OSSL_CHECK(EVP_PKEY_CTX_set_rsa_padding(ctx->pctx, RSA_PKCS1_PADDING) == 1);

        }
        OSSL_CHECK(EVP_DigestVerifyUpdate(ctx, &data[0], data.size()) == 1);
        ERR_clear_error();
        OSSL_CHECK(EVP_DigestVerifyFinal(ctx, (unsigned char*)&signature[0], signatureLen) == 1);
        result = true;
    }// scope
OSSL_CHECK_failed:
    if (ctx)  EVP_MD_CTX_destroy(ctx);
    return result;
}

由于我是macOS的新手,我不确定我是否遗漏了什么。我真的很感谢任何帮助,因为我从一个星期阻止了这个。