Question

我在使用生成的RSA pubkey加密字符串时遇到问题。此密钥存储在unsigned char数组中。以下是该密钥的示例

char *testkey = "-----BEGIN RSA PUBLIC KEY-----\n"
        "MIIBCgKCAQEA3InRLxdx25R6eA4PyXcYzKyFiJULS3ypqlETztAW488XkEM263vJ\n"
        "SY5xpfwph9thcsjYUI3H60qxaTRVhNxbzbsG0ELkEudm4cLMn2oVpphT4cB3zx6V\n"
        "az1cuzIfmL34M8YiRQw6MvdaDJS34y15dXDm0BSXF7sanZaYrHvu84j5mQVK0OWq\n"
        "kvpVs+J55xul/IQsSEWr94HjPupdDYzGXsEiQ7p5cNrvKgjGKqKV177EYROVVgVp\n"
        "gAWm0G6aDrfDLKqsXo8RXj4dyyuZqoL2e7Fa46Gz4I+tb2SWkEwLGpqBe/CUDzDh\n"
        "9aLhaTijDQhcaR5+u88XNbarckKU96wiiQIDAQAB\n"
        "-----END RSA PUBLIC KEY-----\0";

我目前已编写此代码进行加密

RSA                     *rsa = NULL;
BIO                     *key_bio;

static const int        bit = 2048;

key_bio = BIO_new_mem_buf(testkey, -1);

if(key_bio == NULL){
    printf("No key bio \n");
    exit(1);
}

rsa = PEM_read_bio_PUBKEY(key_bio, NULL, NULL, NULL);

if(rsa == NULL){
    fprintf(stderr, "Error loading RSA Public Key File.\n");


    ERR_print_errors_fp(stderr);
    exit(1);
}

// Alloc the encrypted buffer
e->enckey = calloc(1, 2048);

int res = RSA_public_encrypt(strlen((char*)e->key->key), e->key->key, e->enckey, rsa, RSA_PKCS1_PADDING);

if(res == -1){
    printf("Failed to encrypt AES key \n");
    printf("Error: strerror(errno)\n");
}

然而，这不起作用。我认为它与密钥的格式有关，但是我还没有设法找到如何转换它，并使用RSA结构来进行加密。

有什么想法吗？

Answer 1

现在似乎工作正常，使用此insead：

PEM_read_bio_RSAPublicKey(key_bio, &rsa, 0, NULL);

这可能与KEY的格式有关。

C使用RSA pubkey加密字符串

1 个答案: