我从某处收到一个包含 PEM 编码的 X.509 证书的字符串。我想将此证书导入 iOS 的 KeyChain。
我打算做以下事情:
- 将 NSString 转换为 openssl X509
- 创建 PKCS12
- 将 PKCS12 转换为 NSData
- 使用 SecPKCS12Import 导入 NSData
到目前为止,我想出了以下代码:
const char *cert_chars = [certStr cStringUsingEncoding:NSUTF8StringEncoding];
BIO *buffer = BIO_new(BIO_s_mem());
BIO_puts(buffer, cert_chars);
X509 *cert;
cert = PEM_read_bio_X509(buffer, NULL, 0, NULL);
if (cert == NULL) {
NSLog(@"error");
}
X509_print_fp(stdout, cert);
EVP_PKEY *privateKey;
const unsigned char *privateBits = (unsigned char *) [privateKeyData bytes];
int privateLength = [privateKeyData length];
privateKey = d2i_AutoPrivateKey(NULL, &privateBits, privateLength);
if (!X509_check_private_key(cert, privateKey)) {
NSLog(@"PK error");
}
PKCS12 *p12 = PKCS12_create("test", "David's Cert", privateKey, cert, NULL, 0, 0, 0, 0, 0);
不幸的是,即使 X509_check_private_key 成功并且 X509_print_fp(stdout, cert) 打印了有效的证书, p12 也为零。
- 我的方法正确吗
- PKCS12_create 怎么会失败?
更新:
调用 PKCS12_create 似乎在以下方法中失败:
int EVP_PBE_CipherInit(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de)
{
const EVP_CIPHER *cipher;
const EVP_MD *md;
int cipher_nid, md_nid;
EVP_PBE_KEYGEN *keygen;
if (!EVP_PBE_find(EVP_PBE_TYPE_OUTER, OBJ_obj2nid(pbe_obj),
&cipher_nid, &md_nid, &keygen))
{
char obj_tmp[80];
EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM);
if (!pbe_obj) BUF_strlcpy (obj_tmp, "NULL", sizeof obj_tmp);
else i2t_ASN1_OBJECT(obj_tmp, sizeof obj_tmp, pbe_obj);
ERR_add_error_data(2, "TYPE=", obj_tmp);
return 0;
}
if(!pass)
passlen = 0;
else if (passlen == -1)
passlen = strlen(pass);
if (cipher_nid == -1)
cipher = NULL;
else
{
cipher = EVP_get_cipherbynid(cipher_nid);
if (!cipher)
{
EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_CIPHER);
return 0;
}
}
if (md_nid == -1)
md = NULL;
else
{
md = EVP_get_digestbynid(md_nid);
if (!md)
{
EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_DIGEST);
return 0;
}
}
if (!keygen(ctx, pass, passlen, param, cipher, md, en_de))
{
EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);
return 0;
}
return 1;
}
检索密码
cipher = EVP_get_cipherbynid(cipher_nid);
以某种方式为“RC2-40-CBC”返回 nil。