Question

我试图首先加密一个文件并将其发送到服务器，客户端和服务器都是用C openssl编写的。我尝试加密一个文件并在服务器中解密，但在解密时出现错误：

error:0407106B:rsa routines:RSA_padding_check_PKCS1_type_2:block type is not 02

我检查了这个错误已经很长时间了，无法修改它。

以下是我的代码的一部分：

RSA：我认为这部分很好，因为客户端我在加密后立即对其进行解密，并且成功了。

int padding = RSA_PKCS1_PADDING;

RSA * createRSA(unsigned char * key,int public)
{
    RSA *rsa= NULL;
    BIO *keybio ;
    keybio = BIO_new_mem_buf(key, -1);
    if (keybio==NULL)
    {
        printf( "Failed to create key BIO");
        return 0;
    }
    if(public)
    {
        rsa = PEM_read_bio_RSA_PUBKEY(keybio, &rsa,NULL, NULL);
    }
    else
    {
        rsa = PEM_read_bio_RSAPrivateKey(keybio, &rsa,NULL, NULL);
    }
    if(rsa == NULL)
    {
        printf( "Failed to create RSA");
    }

    return rsa;
}

 char publicKey[]="-----BEGIN PUBLIC KEY-----\n"\
"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy8Dbv8prpJ/0kKhlGeJY\n"\
"ozo2t60EG8L0561g13R29LvMR5hyvGZlGJpmn65+A4xHXInJYiPuKzrKUnApeLZ+\n"\
"vw1HocOAZtWK0z3r26uA8kQYOKX9Qt/DbCdvsF9wF8gRK0ptx9M6R13NvBxvVQAp\n"\
"fc9jB9nTzphOgM4JiEYvlV8FLhg9yZovMYd6Wwf3aoXK891VQxTr/kQYoq1Yp+68\n"\
"i6T4nNq7NWC+UNVjQHxNQMQMzU6lWCX8zyg3yH88OAQkUXIXKfQ+NkvYQ1cxaMoV\n"\
"PpY72+eVthKzpMeyHkBn7ciumk5qgLTEJAfWZpe4f4eFZj/Rc8Y8Jj2IS5kVPjUy\n"\
"wQIDAQAB\n"\
"-----END PUBLIC KEY-----\n";

 char privateKey[]="-----BEGIN RSA PRIVATE KEY-----\n"
/* ----8<---------------------*/
"-----END RSA PRIVATE KEY-----\n";

int public_encrypt(unsigned char * data,int data_len,unsigned char * key, unsigned char *encrypted)
{
    RSA * rsa = createRSA(key,1);
    int result = RSA_public_encrypt(data_len,data,encrypted,rsa,padding);
    return result;
}
int private_decrypt(unsigned char * enc_data,int data_len,unsigned char * key, unsigned char *decrypted)
{
    RSA * rsa = createRSA(key,0);
    int  result = RSA_private_decrypt(data_len,enc_data,decrypted,rsa,padding);
    if(result==-1){
    printf("in\n");
    unsigned int errCode = ERR_get_error();

    printf("\nError: %s\n", ERR_error_string(errCode, NULL));

    }
    return result;
}

插口：

int readData(int s, void *buf, int buflen)
{
    int total = 0;
    char *pbuf = (char*) buf;
    while (buflen > 0) {
        int numread = recv(s, pbuf, buflen, 0);
        if (numread <= 0) return numread;
        pbuf += numread;
        buflen -= numread;
        total += numread;
    }
    return total;
}

int sendData(int s, void *buf, int buflen)
{
    int total = 0;
    char *pbuf = (char*) buf;
    while (buflen > 0) {
        int numsent = send(s, pbuf, buflen, 0);
        if (numsent <= 0) return numsent;
        pbuf += numsent;
        buflen -= numsent;
        total += numsent;
    }
    return total;
}

客户端:(这不是整个代码我只选择了一些重要的代码，这里的解密只是为了测试，而且解密成功了）

unsigned char  encrypted[8192]={};
unsigned char decrypted[8192]={};
char buffer[8192];
bzero(buffer,8192);
stream = fopen(save_name,"w+t");
struct stat st ;
stat( put_name, &st );
fread(buffer,1,st.st_size,stream))
int encrypted_length=public_encrypt(buffer,st.st_size,publicKey,encrypted);
printf("after encrypted%s\n", encrypted);
int decrypted_length= private_decrypt(encrypted,256,privateKey,decrypted);
printf("afterdecrypted: %s\n",decrypted);
sendData(fd,encrypted,strlen(encrypted))

服务器：

readData(connfd,buf,intsize);
("recieve data buf:%s\n", buf);
unsigned char  decrypted[8192]={};
bzero(decrypted,8192);
int decrypted_length = private_decrypt(buf,256,privateKey,decrypted);

我用md5检查发送和接收的数据，它们是一样的。你能找到原因吗？

这是另一个问题，同样的错误，但我不能从这里得到任何想法。 Encryption and decryption error 0x0407106B using OpenSSL

我用

printf("in server: \ndata:%s\nlength:%d\nkeylen:%d\n",buf,strlen(buf),strlen(privateKey) );

打印所有周边，它们是相同的。

in server: 
data:k???
U??uE????^??%?^{?N?-?pg???5?|??
???$???ěQ????zܯ?(T?n>f&??J?C??x?
D
length:82
keylen:1675

in client: 
data:k???
U??uE????^??%?^{?N?-?pg???5?|??
???$???ěQ????zܯ?(T?n>f&??J?C??x?
D
length:82
keylen:1675

当我使用valgrind时，它显示了很多问题，第一个是：

==21631== 8 bytes in 1 blocks are indirectly lost in loss record 1 of 35
==21631==    at 0x4A06A2E: malloc (vg_replace_malloc.c:270)
==21631==    by 0x31CF06AC2D: CRYPTO_malloc (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0A72C1: ??? (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0A742C: bn_expand2 (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0A7674: BN_copy (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0A7899: BN_dup (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0ABE2C: BN_BLINDING_create_param (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0CC500: RSA_setup_blinding (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0C4483: ??? (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x31CF0C49C7: ??? (in /usr/lib64/libcrypto.so.1.0.1e)
==21631==    by 0x402263: put_file (client.c:442)
==21631==    by 0x402675: main (client.c:628)

第442行是我的解密功能。所以，我的解密功能有任何问题。

通过套接字发送加密数据失败

0 个答案: