harmony 鸿蒙使用ECDSA密钥对签名验签 (C/C++)

2025-06-16
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使用ECDSA密钥对签名验签 (C/C++)

在CMake脚本中链接相关动态库

target_link_libraries(entry PUBLIC libohcrypto.so)

签名开发步骤

调用OH_CryptoSign_Create，指定字符串参数’RSA2048|PSS|SHA256|MGF1_SHA256’，创建非对称密钥类型为RSA2048、填充模式为PSS、摘要算法为SHA256、掩码算法为MGF1_SHA256的Sign实例，用于完成签名操作。
调用OH_CryptoSign_Init，使用私钥OH_CryptoPrivKey初始化Sign实例。
调用OH_CryptoSign_Update，传入待签名的数据。当前单次update长度没有限制，开发者可以根据数据量判断如何调用update，如果数据量较小，可以直接调用OH_CryptoSign_Final接口一次性传入。
调用OH_CryptoSign_Final，对数据进行签名。
调用OH_CryptoSign_Destroy等释放内存。

#include "CryptoArchitectureKit/crypto_common.h"
#include "CryptoArchitectureKit/crypto_signature.h"
#include "CryptoArchitectureKit/crypto_asym_key.h"

static OH_Crypto_ErrCode doTestRsaPssSignSeg() {
   OH_CryptoAsymKeyGenerator *keyCtx = nullptr;
   OH_CryptoKeyPair *keyPair = nullptr;
   OH_CryptoSign *sign = nullptr;
   Crypto_DataBlob signData = {.data = nullptr, .len = 0};

   uint8_t plainText[] = {
      0xe4, 0x2b, 0xcc, 0x08, 0x11, 0x79, 0x16, 0x1b, 0x35, 0x7f, 0xb3, 0xaf, 0x40, 0x3b, 0x3f, 0x7c
   }; // 待签名数据，仅供参考。
   Crypto_DataBlob msgBlob = {
      .data = reinterpret_cast<uint8_t *>(plainText),
      .len = sizeof(plainText)
   };

   OH_Crypto_ErrCode ret = OH_CryptoAsymKeyGenerator_Create((const char *)"ECC256", &keyCtx);
   if (ret != CRYPTO_SUCCESS) {
      return ret;
   }
   ret = OH_CryptoAsymKeyGenerator_Generate(keyCtx, &keyPair);
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return ret;
   }

   OH_CryptoPrivKey *privKey = OH_CryptoKeyPair_GetPrivKey(keyPair);
   ret = OH_CryptoSign_Create((const char *)"ECC256|SHA256", &sign);
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      OH_CryptoKeyPair_Destroy(keyPair);
      return ret;
   }

   ret = OH_CryptoSign_Init(sign, privKey);
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoSign_Destroy(sign);
      OH_CryptoKeyPair_Destroy(keyPair);
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return ret;
   }
   ret = OH_CryptoSign_Update(sign, &msgBlob);
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoSign_Destroy(sign);
      OH_CryptoKeyPair_Destroy(keyPair);
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return ret;
   }
   ret = OH_CryptoSign_Final(sign, nullptr, &signData);
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoSign_Destroy(sign);
      OH_CryptoKeyPair_Destroy(keyPair);
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return ret;
   }

   OH_CryptoSign_Destroy(sign);
   OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
   OH_CryptoKeyPair_Destroy(keyPair);
   return CRYPTO_SUCCESS;
}

验签开发步骤

调用OH_CryptoVerify_Create，指定字符串参数’ECC256|SHA256’，创建非对称密钥类型为ECC256、摘要算法为SHA256的Verify实例，用于完成验签操作。
调用OH_CryptoVerify_Init，使用公钥（OH_CryptoPubKey）初始化Verify实例。
调用OH_CryptoVerify_Update，传入待验证的数据。当前单次update长度没有限制，开发者可以根据数据量判断如何调用update，如果数据量较小，可以直接调用OH_CryptoVerify_Final接口一次性传入。
调用OH_CryptoVerify_Final，对数据进行验签。

#include "CryptoArchitectureKit/crypto_common.h"
#include "CryptoArchitectureKit/crypto_signature.h"
#include "CryptoArchitectureKit/crypto_asym_key.h"

static bool doTestEcdsaSignature()
{
   OH_CryptoAsymKeyGenerator *keyCtx = nullptr;
   OH_CryptoKeyPair *keyPair = nullptr;
   OH_CryptoVerify *verify = nullptr;

   uint8_t plainText[] = {
      0xe4, 0x2b, 0xcc, 0x08, 0x11, 0x79, 0x16, 0x1b, 0x35, 0x7f, 0xb3, 0xaf, 0x40, 0x3b, 0x3f, 0x7c
   }; // 待验证数据，仅供参考。
   Crypto_DataBlob msgBlob = {
      .data = reinterpret_cast<uint8_t *>(plainText),
      .len = sizeof(plainText)
   };

   uint8_t pubKeyText[] = {
      0x30, 0x39, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
      0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, 0x22, 0x00, 0x03, 0x4d, 0xe4, 0xbb, 0x11, 0x10,
      0x1a, 0xd2, 0x05, 0x74, 0xf1, 0x0b, 0xb4, 0x75, 0x57, 0xf4, 0x3e, 0x55, 0x14, 0x17, 0x05, 0x4a,
      0xb2, 0xfb, 0x8c, 0x84, 0x64, 0x38, 0x02, 0xa0, 0x2a, 0xa6, 0xf0
   }; // DER格式的公钥编码数据，仅供参考。

   Crypto_DataBlob keyBlob = {
      .data = reinterpret_cast<uint8_t *>(pubKeyText),
      .len = sizeof(pubKeyText)
   };

   uint8_t signText[] = {
      0x30, 0x44, 0x02, 0x20, 0x21, 0x89, 0x99, 0xb1, 0x56, 0x4e, 0x3a, 0x2c, 0x16, 0x08, 0xb5, 0x8a,
      0x06, 0x6f, 0x67, 0x47, 0x1b, 0x04, 0x18, 0x7d, 0x53, 0x2d, 0xba, 0x00, 0x38, 0xd9, 0xe3, 0xe7,
      0x8c, 0xcf, 0x76, 0x83, 0x02, 0x20, 0x13, 0x54, 0x84, 0x9d, 0x73, 0x40, 0xc3, 0x92, 0x66, 0xdc,
      0x3e, 0xc9, 0xf1, 0x4c, 0x33, 0x84, 0x2a, 0x76, 0xaf, 0xc6, 0x61, 0x84, 0x5c, 0xae, 0x4b, 0x0d,
      0x3c, 0xb0, 0xc8, 0x04, 0x89, 0x71
   }; // 签名数据，仅供参考。

   Crypto_DataBlob signBlob = {
      .data = reinterpret_cast<uint8_t *>(signText),
      .len = sizeof(signText)
   };
   
   OH_Crypto_ErrCode ret = CRYPTO_SUCCESS;

   ret = OH_CryptoAsymKeyGenerator_Create((const char *)"ECC256", &keyCtx);
   if (ret != CRYPTO_SUCCESS) {
      return false;
   }
   ret = OH_CryptoAsymKeyGenerator_Convert(keyCtx, CRYPTO_DER, &keyBlob, nullptr, &keyPair); // 将DER格式的公钥编码数据转换为OH_CryptoKeyPair。
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return false;
   }
   OH_CryptoPubKey *pubKey = OH_CryptoKeyPair_GetPubKey(keyPair); // 获取公钥对象。
   // verify
   ret = OH_CryptoVerify_Create((const char *)"ECC256|SHA256", &verify); // 创建Verify实例。
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoVerify_Destroy(verify);
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return false;
   }
   ret = OH_CryptoVerify_Init(verify, pubKey);
   if (ret != CRYPTO_SUCCESS) {
      OH_CryptoVerify_Destroy(verify);
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return false;
   }
   bool res = OH_CryptoVerify_Final(verify, &msgBlob, &signBlob);
   if (res != true) {
      OH_CryptoVerify_Destroy(verify);
      OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
      return false;
   }

   OH_CryptoVerify_Destroy(verify);
   OH_CryptoAsymKeyGenerator_Destroy(keyCtx);
   OH_CryptoKeyPair_Destroy(keyPair);
   return res;
}