Encryption 使用OpenSSL rsa密钥解密时出错

我正在尝试编写一个简单的应用程序，使用OpenSSL RSA加密对

无符号字符的缓冲区进行加密/解密。我有我的公钥并用

unsigned char plain [13] = "Hello World!";
unsigned char encrypted[1024]={};
unsigned char decrypted[1024]={};
int padding = RSA_PKCS1_OAEP_PADDING;
int flen = 13;
int res = RSA_public_encrypt(flen, plain, encrypted, rsa_pbk, padding);

其中，
rsa\u pbk
是包含密钥的rsa结构。如果我打印它，结果是以下十六进制数组：

13 d0 44 a3 2b 12 67 d8 e2 aa cf 53 6c 81 ed e9 9e 2d 9c dd 1d 28 84 5b 60 93 58 1c 7f eb b 66 26 39 8c 27 48 11 31 6 53 90 16 2e da 5c 7e 48 3e 15 c2 19 d3 10 79 71 1a fa f7 c1 57 93 82 f2 95 1 e d8 70 ba 1b 7e 12 d5 a 34 75 8f 2f 3c a6 60 f1 4b 60 6c 94 3e 4b 72 61 81 fb 89 e2 1e 5a 8 48 55 a5 5f 44 3b a4 e2 16 eb 7e 87 10 18 2e 1b 82 e7 86 43 69 21 ec a5 98 4 de 90 c5 5a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

我对结尾的零有点怀疑，但可能没问题。但是，当我试图用

flen = keysize - 50;
RSA_private_decrypt(flen, encrypted, decrypted, this->rsa_pvk, padding);

我得到以下错误

error:0407A079:rsa routines:RSA_padding_check_PKCS1_OAEP:oaep decoding error
error:04065072:rsa routines:RSA_EAY_PRIVATE_DECRYPT:padding check failed

我无法理解。有人知道它的含义和产生的原因吗？
声明：RSA\u public\u encrypt（）返回加密数据的大小。RSA_private_decrypt（）返回恢复的明文的大小。出现错误时，返回-1；错误代码可以通过ERR_get_error（3）获得

您的代码应该如下所示：

unsigned char plain [13] = "Hello World!";
unsigned char encrypted[1024]={};
unsigned char decrypted[1024]={};
int padding = RSA_PKCS1_OAEP_PADDING;
int flen = 13;
int res = RSA_public_encrypt(flen, plain, encrypted, rsa_pbk, padding);
flen = res;
res = RSA_private_decrypt(flen, encrypted, decrypted, this->rsa_pvk, padding);