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我使用 SecKeyCreateWithData 创建公钥。剥离标题后从 Pem 创建密钥。

我尝试使用验证签名

  1. SecKeyRawVerify 返回 -9809 错误 (iOS)
  2. SecKeyVerifySignature 返回 -67808 “RSA 签名验证失败,不匹配”(iOS)
  3. SecTransformExecute 返回 false。(操作系统)

我们使用 SHA256 和 Unicode 编码对消息进行签名(C# RSACryptoProvider)。

创建公钥的代码:

NSDictionary* attributes =
    @{ (id)kSecAttrKeyType:               (id)kSecAttrKeyTypeRSA,
       (id)kSecAttrKeySizeInBits:         @2048,
       (id)kSecPublicKeyAttrs:
           @{ (id)kSecAttrIsPermanent:    @YES,
              (id)kSecAttrApplicationTag: tag1
            },
       (id)kSecAttrCanEncrypt:@YES,
       (id)kSecAttrCanVerify:@YES,
       (id)kSecAttrKeyClass: (id)kSecAttrKeyClassPublic
     };

    CFErrorRef error = NULL;
    SecKeyRef keyRef = SecKeyCreateWithData((__bridge CFDataRef)publicKeyData,
                                      (__bridge CFDictionaryRef)attributes,
                                      &error);

验证码 iOS:

size_t signedHashBytesSize = SecKeyGetBlockSize(keyRef);
const void* signedHashBytes = [signature bytes];
NSData *plainData = [dataToSign dataUsingEncoding:NSUTF16StringEncoding];
size_t hashBytesSize = CC_SHA256_DIGEST_LENGTH;
uint8_t* hashBytes = malloc(hashBytesSize);
if (!CC_SHA256([plainData bytes], (CC_LONG)[plainData length], hashBytes)) {
    return nil;
}

OSStatus status1 = SecKeyRawVerify(keyRef,
                                  kSecPaddingPKCS1,
                                  hashBytes,
                                  hashBytesSize,
                                  signedHashBytes,
                                  signedHashBytesSize);

验证码 OSx:

    verifier = SecVerifyTransformCreate(keyRef, (__bridge CFDataRef)self.digest, &errorCF);
    if (errorCF) { CFShow(errorCF);}
    SecTransformSetAttribute(verifier,
                             kSecTransformInputAttributeName,
                             (__bridge CFTypeRef)plainData,
                             &errorCF);
    if (errorCF) { CFShow(errorCF); exit(-1); }
    SecTransformSetAttribute(verifier,
                             kSecDigestTypeAttribute,
                             kSecDigestSHA2,
                             &errorCF);
    if (errorCF) { CFShow(errorCF); exit(-1); }
    SecTransformSetAttribute(verifier,
                             kSecDigestLengthAttribute,
                             (__bridge CFNumberRef)@256,
                             &errorCF);
    if (errorCF) { CFShow(errorCF); exit(-1); }
    CFBooleanRef result1 = NULL;
    result1 = SecTransformExecute(verifier, &errorCF);
    BOOL success = (result1 != NULL);

我被困住了,任何帮助将不胜感激。

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0 回答 0