eec11827a6
1. Have the new Keystore for mini-keystore impelemntation. 2. Add CertTool library and jni dll for handling keygen and certificates. 3. Make Reply hidden. 4. Revert some 'incorrect' change and correct the description.
250 lines
6.4 KiB
C
250 lines
6.4 KiB
C
/*
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**
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** Copyright 2009, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#define LOG_TAG "CertTool"
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#include <stdio.h>
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#include <openssl/engine.h>
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#include <openssl/pem.h>
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#include <openssl/pkcs12.h>
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#include <openssl/rsa.h>
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#include <openssl/x509v3.h>
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#include <cutils/log.h>
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#include "cert.h"
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static PKEY_STORE pkey_store[KEYGEN_STORE_SIZE];
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static int store_index = 0;
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static char emsg[][30] = {
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"",
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STR(ERR_INVALID_KEY_LENGTH),
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STR(ERR_CONSTRUCT_NEW_DATA),
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STR(ERR_RSA_KEYGEN),
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STR(ERR_X509_PROCESS),
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STR(ERR_BIO_READ),
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};
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static void save_in_store(X509_REQ *req, EVP_PKEY *pkey)
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{
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EVP_PKEY *newpkey = EVP_PKEY_new();
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RSA *rsa = EVP_PKEY_get1_RSA(pkey);
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EVP_PKEY_set1_RSA(newpkey, rsa);
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PKEY_STORE_free(pkey_store[store_index]);
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pkey_store[store_index].key_len =
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i2d_X509_PUBKEY(req->req_info->pubkey, &pkey_store[store_index].public_key);
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pkey_store[store_index++].pkey = newpkey;
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store_index %= KEYGEN_STORE_SIZE;
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RSA_free(rsa);
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}
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static EVP_PKEY *get_pkey_from_store(X509 *cert)
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{
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int i, key_len;
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unsigned char *buf = NULL;
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if ((key_len = i2d_X509_PUBKEY(X509_get_X509_PUBKEY(cert), &buf)) == 0) {
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return NULL;
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}
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for (i = 0 ; i < KEYGEN_STORE_SIZE ; ++i) {
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if ((key_len == pkey_store[i].key_len) &&
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memcmp(buf, pkey_store[i].public_key, key_len) == 0) {
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break;
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}
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}
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free(buf);
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return (i == KEYGEN_STORE_SIZE) ? NULL : pkey_store[i].pkey;
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}
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int gen_csr(int bits, const char *organizations, char reply[REPLY_MAX])
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{
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int len, ret_code = 0;
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BIGNUM *bn = NULL;
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BIO *bio = NULL;
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EVP_PKEY *pkey = NULL;
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RSA *rsa = NULL;
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X509_REQ *req = NULL;
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X509_NAME *name = NULL;
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if ((bio = BIO_new(BIO_s_mem())) == NULL) goto err;
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if ((bits != KEYLENGTH_MEDIUM) && (bits != KEYLENGTH_MAXIMUM)) {
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ret_code = ERR_INVALID_KEY_LENGTH;
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goto err;
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}
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if (((pkey = EVP_PKEY_new()) == NULL) ||
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((req = X509_REQ_new()) == NULL) ||
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((rsa = RSA_new()) == NULL) || ((bn = BN_new()) == NULL)) {
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ret_code = ERR_CONSTRUCT_NEW_DATA;
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goto err;
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}
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if (!BN_set_word(bn, RSA_F4) ||
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!RSA_generate_key_ex(rsa, bits, bn, NULL) ||
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!EVP_PKEY_assign_RSA(pkey, rsa)) {
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ret_code = ERR_RSA_KEYGEN;
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goto err;
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}
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// rsa will be part of the req, it will be freed in X509_REQ_free(req)
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rsa = NULL;
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X509_REQ_set_pubkey(req, pkey);
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name = X509_REQ_get_subject_name(req);
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X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC,
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(const unsigned char *)"US", -1, -1, 0);
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X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC,
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(const unsigned char *) ANDROID_KEYSTORE,
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-1, -1, 0);
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X509_NAME_add_entry_by_txt(name, "O", MBSTRING_ASC,
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(const unsigned char *)organizations, -1, -1, 0);
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if (!X509_REQ_sign(req, pkey, EVP_md5()) ||
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(PEM_write_bio_X509_REQ(bio, req) <= 0)) {
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ret_code = ERR_X509_PROCESS;
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goto err;
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}
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if ((len = BIO_read(bio, reply, REPLY_MAX - 1)) > 0) {
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reply[len] = 0;
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save_in_store(req, pkey);
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} else {
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ret_code = ERR_BIO_READ;
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}
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err:
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if (rsa) RSA_free(rsa);
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if (bn) BN_free(bn);
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if (req) X509_REQ_free(req);
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if (pkey) EVP_PKEY_free(pkey);
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if (bio) BIO_free(bio);
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if ((ret_code > 0) && (ret_code < ERR_MAXIMUM)) LOGE(emsg[ret_code]);
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return ret_code;
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}
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int is_pkcs12(const char *buf, int bufLen)
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{
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int ret = 0;
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BIO *bp = NULL;
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PKCS12 *p12 = NULL;
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if (!buf || bufLen < 1) goto err;
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if (buf[0] != 48) goto err; // it is not DER.
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if (!BIO_write(bp, buf, bufLen)) goto err;
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if ((p12 = d2i_PKCS12_bio(bp, NULL)) != NULL) {
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PKCS12_free(p12);
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ret = 1;
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}
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err:
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if (bp) BIO_free(bp);
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return ret;
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}
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X509* parse_cert(const char *buf, int bufLen)
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{
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X509 *cert = NULL;
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BIO *bp = NULL;
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if(!buf || bufLen < 1)
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return NULL;
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bp = BIO_new(BIO_s_mem());
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if (!bp) goto err;
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if (!BIO_write(bp, buf, bufLen)) goto err;
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cert = PEM_read_bio_X509(bp, NULL, NULL, NULL);
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if (!cert) {
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BIO_free(bp);
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if((bp = BIO_new(BIO_s_mem())) == NULL) goto err;
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if(!BIO_write(bp, (char *) buf, bufLen)) goto err;
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cert = d2i_X509_bio(bp, NULL);
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}
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err:
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if (bp) BIO_free(bp);
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return cert;
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}
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static int get_distinct_name(X509_NAME *dname, char *buf, int size)
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{
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int i, len;
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char *p, *name;
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if (X509_NAME_oneline(dname, buf, size) == NULL) {
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return -1;
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}
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name = strstr(buf, "/CN=");
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p = name = name ? (name + 4) : buf;
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while (*p != 0) {
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if (*p == ' ') *p = '_';
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if (*p == '/') {
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*p = 0;
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break;
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}
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++p;
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}
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return 0;
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}
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int get_cert_name(X509 *cert, char *buf, int size)
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{
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if (!cert) return -1;
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return get_distinct_name(X509_get_subject_name(cert), buf, size);
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}
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int get_issuer_name(X509 *cert, char *buf, int size)
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{
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if (!cert) return -1;
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return get_distinct_name(X509_get_issuer_name(cert), buf, size);
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}
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int is_ca_cert(X509 *cert)
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{
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int ret = 0;
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BASIC_CONSTRAINTS *bs = (BASIC_CONSTRAINTS *)
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X509_get_ext_d2i(cert, NID_basic_constraints, NULL, NULL);
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if (bs != NULL) ret = bs->ca;
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if (bs) BASIC_CONSTRAINTS_free(bs);
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return ret;
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}
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int get_private_key_pem(X509 *cert, char *buf, int size)
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{
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int len = 0;
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BIO *bio = NULL;
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EVP_PKEY *pkey = get_pkey_from_store(cert);
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if (pkey == NULL) return -1;
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bio = BIO_new(BIO_s_mem());
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if ((bio = BIO_new(BIO_s_mem())) == NULL) goto err;
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if (!PEM_write_bio_PrivateKey(bio, pkey, NULL,NULL,0,NULL, NULL)) {
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goto err;
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}
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if ((len = BIO_read(bio, buf, size - 1)) > 0) {
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buf[len] = 0;
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}
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err:
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if (bio) BIO_free(bio);
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return (len == 0) ? -1 : 0;
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}
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