338 lines
10 KiB
C
338 lines
10 KiB
C
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/*
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* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/rsa.h>
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#include <openssl/dsa.h>
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#ifndef OPENSSL_NO_STDIO
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STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
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pem_password_cb *cb, void *u)
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{
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BIO *b;
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STACK_OF(X509_INFO) *ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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PEMerr(PEM_F_PEM_X509_INFO_READ, ERR_R_BUF_LIB);
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return 0;
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
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BIO_free(b);
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return ret;
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}
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#endif
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STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
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pem_password_cb *cb, void *u)
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{
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X509_INFO *xi = NULL;
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char *name = NULL, *header = NULL;
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void *pp;
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unsigned char *data = NULL;
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const unsigned char *p;
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long len, error = 0;
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int ok = 0;
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STACK_OF(X509_INFO) *ret = NULL;
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unsigned int i, raw, ptype;
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d2i_of_void *d2i = 0;
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if (sk == NULL) {
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if ((ret = sk_X509_INFO_new_null()) == NULL) {
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PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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} else
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ret = sk;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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for (;;) {
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raw = 0;
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ptype = 0;
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i = PEM_read_bio(bp, &name, &header, &data, &len);
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if (i == 0) {
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error = ERR_GET_REASON(ERR_peek_last_error());
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if (error == PEM_R_NO_START_LINE) {
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ERR_clear_error();
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break;
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}
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goto err;
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}
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start:
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if ((strcmp(name, PEM_STRING_X509) == 0) ||
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(strcmp(name, PEM_STRING_X509_OLD) == 0)) {
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d2i = (D2I_OF(void)) d2i_X509;
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if (xi->x509 != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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goto start;
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}
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pp = &(xi->x509);
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} else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
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d2i = (D2I_OF(void)) d2i_X509_AUX;
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if (xi->x509 != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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goto start;
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}
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pp = &(xi->x509);
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} else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
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d2i = (D2I_OF(void)) d2i_X509_CRL;
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if (xi->crl != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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goto start;
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}
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pp = &(xi->crl);
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} else
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#ifndef OPENSSL_NO_RSA
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if (strcmp(name, PEM_STRING_RSA) == 0) {
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d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
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if (xi->x_pkey != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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goto start;
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}
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xi->enc_data = NULL;
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xi->enc_len = 0;
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xi->x_pkey = X509_PKEY_new();
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if (xi->x_pkey == NULL)
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goto err;
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ptype = EVP_PKEY_RSA;
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pp = &xi->x_pkey->dec_pkey;
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if ((int)strlen(header) > 10) /* assume encrypted */
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raw = 1;
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} else
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#endif
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#ifndef OPENSSL_NO_DSA
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if (strcmp(name, PEM_STRING_DSA) == 0) {
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d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
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if (xi->x_pkey != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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goto start;
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}
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xi->enc_data = NULL;
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xi->enc_len = 0;
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xi->x_pkey = X509_PKEY_new();
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if (xi->x_pkey == NULL)
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goto err;
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ptype = EVP_PKEY_DSA;
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pp = &xi->x_pkey->dec_pkey;
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if ((int)strlen(header) > 10) /* assume encrypted */
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raw = 1;
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} else
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#endif
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#ifndef OPENSSL_NO_EC
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if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
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d2i = (D2I_OF(void)) d2i_ECPrivateKey;
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if (xi->x_pkey != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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goto start;
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}
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xi->enc_data = NULL;
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xi->enc_len = 0;
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xi->x_pkey = X509_PKEY_new();
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if (xi->x_pkey == NULL)
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goto err;
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ptype = EVP_PKEY_EC;
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pp = &xi->x_pkey->dec_pkey;
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if ((int)strlen(header) > 10) /* assume encrypted */
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raw = 1;
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} else
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#endif
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{
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d2i = NULL;
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pp = NULL;
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}
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if (d2i != NULL) {
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if (!raw) {
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EVP_CIPHER_INFO cipher;
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if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
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goto err;
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if (!PEM_do_header(&cipher, data, &len, cb, u))
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goto err;
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p = data;
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if (ptype) {
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if (!d2i_PrivateKey(ptype, pp, &p, len)) {
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PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
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goto err;
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}
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} else if (d2i(pp, &p, len) == NULL) {
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PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
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goto err;
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}
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} else { /* encrypted RSA data */
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if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
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goto err;
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xi->enc_data = (char *)data;
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xi->enc_len = (int)len;
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data = NULL;
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}
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} else {
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/* unknown */
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}
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OPENSSL_free(name);
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name = NULL;
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OPENSSL_free(header);
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header = NULL;
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OPENSSL_free(data);
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data = NULL;
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}
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/*
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* if the last one hasn't been pushed yet and there is anything in it
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* then add it to the stack ...
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*/
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if ((xi->x509 != NULL) || (xi->crl != NULL) ||
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(xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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xi = NULL;
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}
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ok = 1;
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err:
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X509_INFO_free(xi);
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if (!ok) {
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for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
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xi = sk_X509_INFO_value(ret, i);
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X509_INFO_free(xi);
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}
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if (ret != sk)
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sk_X509_INFO_free(ret);
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ret = NULL;
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}
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OPENSSL_free(name);
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OPENSSL_free(header);
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OPENSSL_free(data);
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return ret;
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}
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/* A TJH addition */
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int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
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unsigned char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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int i, ret = 0;
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unsigned char *data = NULL;
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const char *objstr = NULL;
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char buf[PEM_BUFSIZE];
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unsigned char *iv = NULL;
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if (enc != NULL) {
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objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
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if (objstr == NULL
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/*
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* Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
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* fits into buf
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*/
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|| (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13)
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> sizeof(buf)) {
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PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
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goto err;
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}
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}
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/*
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* now for the fun part ... if we have a private key then we have to be
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* able to handle a not-yet-decrypted key being written out correctly ...
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* if it is decrypted or it is non-encrypted then we use the base code
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*/
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if (xi->x_pkey != NULL) {
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if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
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if (enc == NULL) {
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PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_CIPHER_IS_NULL);
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goto err;
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}
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/* copy from weirdo names into more normal things */
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iv = xi->enc_cipher.iv;
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data = (unsigned char *)xi->enc_data;
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i = xi->enc_len;
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/*
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* we take the encryption data from the internal stuff rather
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* than what the user has passed us ... as we have to match
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* exactly for some strange reason
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*/
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objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
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if (objstr == NULL) {
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PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,
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PEM_R_UNSUPPORTED_CIPHER);
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goto err;
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}
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/* Create the right magic header stuff */
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buf[0] = '\0';
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PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
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PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc),
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(char *)iv);
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/* use the normal code to write things out */
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i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
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if (i <= 0)
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goto err;
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} else {
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/* Add DSA/DH */
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#ifndef OPENSSL_NO_RSA
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/* normal optionally encrypted stuff */
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if (PEM_write_bio_RSAPrivateKey(bp,
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EVP_PKEY_get0_RSA(xi->x_pkey->dec_pkey),
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enc, kstr, klen, cb, u) <= 0)
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goto err;
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#endif
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}
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}
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/* if we have a certificate then write it out now */
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if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
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goto err;
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/*
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* we are ignoring anything else that is loaded into the X509_INFO
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* structure for the moment ... as I don't need it so I'm not coding it
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* here and Eric can do it when this makes it into the base library --tjh
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*/
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ret = 1;
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err:
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OPENSSL_cleanse(buf, PEM_BUFSIZE);
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return ret;
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}
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