[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/buffer.h>
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| 13 | #include <openssl/objects.h>
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| 14 | #include <openssl/evp.h>
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| 15 | #include <openssl/x509.h>
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| 16 | #include <openssl/pem.h>
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| 17 | #include <openssl/rsa.h>
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| 18 | #include <openssl/dsa.h>
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| 19 |
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| 20 | #ifndef OPENSSL_NO_STDIO
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| 21 | STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
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| 22 | pem_password_cb *cb, void *u)
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| 23 | {
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| 24 | BIO *b;
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| 25 | STACK_OF(X509_INFO) *ret;
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| 26 |
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| 27 | if ((b = BIO_new(BIO_s_file())) == NULL) {
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| 28 | PEMerr(PEM_F_PEM_X509_INFO_READ, ERR_R_BUF_LIB);
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| 29 | return (0);
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| 30 | }
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| 31 | BIO_set_fp(b, fp, BIO_NOCLOSE);
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| 32 | ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
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| 33 | BIO_free(b);
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| 34 | return (ret);
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| 35 | }
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| 36 | #endif
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| 37 |
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| 38 | STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
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| 39 | pem_password_cb *cb, void *u)
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| 40 | {
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| 41 | X509_INFO *xi = NULL;
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| 42 | char *name = NULL, *header = NULL;
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| 43 | void *pp;
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| 44 | unsigned char *data = NULL;
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| 45 | const unsigned char *p;
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| 46 | long len, error = 0;
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| 47 | int ok = 0;
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| 48 | STACK_OF(X509_INFO) *ret = NULL;
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| 49 | unsigned int i, raw, ptype;
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| 50 | d2i_of_void *d2i = 0;
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| 51 |
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| 52 | if (sk == NULL) {
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| 53 | if ((ret = sk_X509_INFO_new_null()) == NULL) {
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| 54 | PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_MALLOC_FAILURE);
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| 55 | goto err;
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| 56 | }
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| 57 | } else
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| 58 | ret = sk;
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| 59 |
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| 60 | if ((xi = X509_INFO_new()) == NULL)
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| 61 | goto err;
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| 62 | for (;;) {
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| 63 | raw = 0;
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| 64 | ptype = 0;
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| 65 | i = PEM_read_bio(bp, &name, &header, &data, &len);
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| 66 | if (i == 0) {
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| 67 | error = ERR_GET_REASON(ERR_peek_last_error());
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| 68 | if (error == PEM_R_NO_START_LINE) {
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| 69 | ERR_clear_error();
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| 70 | break;
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| 71 | }
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| 72 | goto err;
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| 73 | }
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| 74 | start:
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| 75 | if ((strcmp(name, PEM_STRING_X509) == 0) ||
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| 76 | (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
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| 77 | d2i = (D2I_OF(void)) d2i_X509;
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| 78 | if (xi->x509 != NULL) {
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| 79 | if (!sk_X509_INFO_push(ret, xi))
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| 80 | goto err;
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| 81 | if ((xi = X509_INFO_new()) == NULL)
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| 82 | goto err;
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| 83 | goto start;
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| 84 | }
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| 85 | pp = &(xi->x509);
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| 86 | } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
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| 87 | d2i = (D2I_OF(void)) d2i_X509_AUX;
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| 88 | if (xi->x509 != NULL) {
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| 89 | if (!sk_X509_INFO_push(ret, xi))
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| 90 | goto err;
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| 91 | if ((xi = X509_INFO_new()) == NULL)
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| 92 | goto err;
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| 93 | goto start;
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| 94 | }
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| 95 | pp = &(xi->x509);
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| 96 | } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
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| 97 | d2i = (D2I_OF(void)) d2i_X509_CRL;
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| 98 | if (xi->crl != NULL) {
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| 99 | if (!sk_X509_INFO_push(ret, xi))
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| 100 | goto err;
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| 101 | if ((xi = X509_INFO_new()) == NULL)
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| 102 | goto err;
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| 103 | goto start;
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| 104 | }
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| 105 | pp = &(xi->crl);
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| 106 | } else
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| 107 | #ifndef OPENSSL_NO_RSA
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| 108 | if (strcmp(name, PEM_STRING_RSA) == 0) {
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| 109 | d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
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| 110 | if (xi->x_pkey != NULL) {
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| 111 | if (!sk_X509_INFO_push(ret, xi))
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| 112 | goto err;
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| 113 | if ((xi = X509_INFO_new()) == NULL)
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| 114 | goto err;
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| 115 | goto start;
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| 116 | }
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| 117 |
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| 118 | xi->enc_data = NULL;
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| 119 | xi->enc_len = 0;
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| 120 |
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| 121 | xi->x_pkey = X509_PKEY_new();
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| 122 | if (xi->x_pkey == NULL)
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| 123 | goto err;
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| 124 | ptype = EVP_PKEY_RSA;
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| 125 | pp = &xi->x_pkey->dec_pkey;
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| 126 | if ((int)strlen(header) > 10) /* assume encrypted */
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| 127 | raw = 1;
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| 128 | } else
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| 129 | #endif
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| 130 | #ifndef OPENSSL_NO_DSA
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| 131 | if (strcmp(name, PEM_STRING_DSA) == 0) {
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| 132 | d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
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| 133 | if (xi->x_pkey != NULL) {
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| 134 | if (!sk_X509_INFO_push(ret, xi))
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| 135 | goto err;
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| 136 | if ((xi = X509_INFO_new()) == NULL)
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| 137 | goto err;
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| 138 | goto start;
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| 139 | }
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| 140 |
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| 141 | xi->enc_data = NULL;
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| 142 | xi->enc_len = 0;
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| 143 |
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| 144 | xi->x_pkey = X509_PKEY_new();
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| 145 | if (xi->x_pkey == NULL)
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| 146 | goto err;
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| 147 | ptype = EVP_PKEY_DSA;
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| 148 | pp = &xi->x_pkey->dec_pkey;
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| 149 | if ((int)strlen(header) > 10) /* assume encrypted */
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| 150 | raw = 1;
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| 151 | } else
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| 152 | #endif
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| 153 | #ifndef OPENSSL_NO_EC
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| 154 | if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
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| 155 | d2i = (D2I_OF(void)) d2i_ECPrivateKey;
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| 156 | if (xi->x_pkey != NULL) {
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| 157 | if (!sk_X509_INFO_push(ret, xi))
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| 158 | goto err;
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| 159 | if ((xi = X509_INFO_new()) == NULL)
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| 160 | goto err;
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| 161 | goto start;
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| 162 | }
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| 163 |
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| 164 | xi->enc_data = NULL;
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| 165 | xi->enc_len = 0;
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| 166 |
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| 167 | xi->x_pkey = X509_PKEY_new();
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| 168 | if (xi->x_pkey == NULL)
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| 169 | goto err;
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| 170 | ptype = EVP_PKEY_EC;
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| 171 | pp = &xi->x_pkey->dec_pkey;
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| 172 | if ((int)strlen(header) > 10) /* assume encrypted */
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| 173 | raw = 1;
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| 174 | } else
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| 175 | #endif
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| 176 | {
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| 177 | d2i = NULL;
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| 178 | pp = NULL;
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| 179 | }
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| 180 |
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| 181 | if (d2i != NULL) {
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| 182 | if (!raw) {
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| 183 | EVP_CIPHER_INFO cipher;
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| 184 |
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| 185 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
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| 186 | goto err;
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| 187 | if (!PEM_do_header(&cipher, data, &len, cb, u))
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| 188 | goto err;
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| 189 | p = data;
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| 190 | if (ptype) {
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| 191 | if (!d2i_PrivateKey(ptype, pp, &p, len)) {
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| 192 | PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
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| 193 | goto err;
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| 194 | }
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| 195 | } else if (d2i(pp, &p, len) == NULL) {
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| 196 | PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
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| 197 | goto err;
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| 198 | }
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| 199 | } else { /* encrypted RSA data */
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| 200 | if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
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| 201 | goto err;
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| 202 | xi->enc_data = (char *)data;
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| 203 | xi->enc_len = (int)len;
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| 204 | data = NULL;
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| 205 | }
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| 206 | } else {
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| 207 | /* unknown */
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| 208 | }
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| 209 | OPENSSL_free(name);
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| 210 | name = NULL;
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| 211 | OPENSSL_free(header);
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| 212 | header = NULL;
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| 213 | OPENSSL_free(data);
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| 214 | data = NULL;
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| 215 | }
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| 216 |
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| 217 | /*
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| 218 | * if the last one hasn't been pushed yet and there is anything in it
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| 219 | * then add it to the stack ...
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| 220 | */
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| 221 | if ((xi->x509 != NULL) || (xi->crl != NULL) ||
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| 222 | (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
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| 223 | if (!sk_X509_INFO_push(ret, xi))
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| 224 | goto err;
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| 225 | xi = NULL;
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| 226 | }
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| 227 | ok = 1;
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| 228 | err:
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| 229 | X509_INFO_free(xi);
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| 230 | if (!ok) {
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| 231 | for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
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| 232 | xi = sk_X509_INFO_value(ret, i);
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| 233 | X509_INFO_free(xi);
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| 234 | }
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| 235 | if (ret != sk)
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| 236 | sk_X509_INFO_free(ret);
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| 237 | ret = NULL;
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| 238 | }
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| 239 |
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| 240 | OPENSSL_free(name);
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| 241 | OPENSSL_free(header);
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| 242 | OPENSSL_free(data);
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| 243 | return (ret);
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| 244 | }
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| 245 |
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| 246 | /* A TJH addition */
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| 247 | int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
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| 248 | unsigned char *kstr, int klen,
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| 249 | pem_password_cb *cb, void *u)
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| 250 | {
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| 251 | int i, ret = 0;
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| 252 | unsigned char *data = NULL;
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| 253 | const char *objstr = NULL;
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| 254 | char buf[PEM_BUFSIZE];
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| 255 | unsigned char *iv = NULL;
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| 256 |
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| 257 | if (enc != NULL) {
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| 258 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
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| 259 | if (objstr == NULL) {
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| 260 | PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
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| 261 | goto err;
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| 262 | }
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| 263 | }
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| 264 |
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| 265 | /*
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| 266 | * now for the fun part ... if we have a private key then we have to be
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| 267 | * able to handle a not-yet-decrypted key being written out correctly ...
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| 268 | * if it is decrypted or it is non-encrypted then we use the base code
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| 269 | */
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| 270 | if (xi->x_pkey != NULL) {
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| 271 | if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
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| 272 | if (enc == NULL) {
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| 273 | PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_CIPHER_IS_NULL);
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| 274 | goto err;
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| 275 | }
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| 276 |
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| 277 | /* copy from weirdo names into more normal things */
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| 278 | iv = xi->enc_cipher.iv;
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| 279 | data = (unsigned char *)xi->enc_data;
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| 280 | i = xi->enc_len;
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| 281 |
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| 282 | /*
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| 283 | * we take the encryption data from the internal stuff rather
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| 284 | * than what the user has passed us ... as we have to match
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| 285 | * exactly for some strange reason
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| 286 | */
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| 287 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
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| 288 | if (objstr == NULL) {
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| 289 | PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,
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| 290 | PEM_R_UNSUPPORTED_CIPHER);
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| 291 | goto err;
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| 292 | }
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| 293 |
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| 294 | /* create the right magic header stuff */
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| 295 | OPENSSL_assert(strlen(objstr) + 23
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| 296 | + 2 * EVP_CIPHER_iv_length(enc) + 13 <=
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| 297 | sizeof buf);
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| 298 | buf[0] = '\0';
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| 299 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
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| 300 | PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc),
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| 301 | (char *)iv);
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| 302 |
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| 303 | /* use the normal code to write things out */
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| 304 | i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
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| 305 | if (i <= 0)
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| 306 | goto err;
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| 307 | } else {
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| 308 | /* Add DSA/DH */
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| 309 | #ifndef OPENSSL_NO_RSA
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| 310 | /* normal optionally encrypted stuff */
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| 311 | if (PEM_write_bio_RSAPrivateKey(bp,
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| 312 | EVP_PKEY_get0_RSA(xi->x_pkey->dec_pkey),
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| 313 | enc, kstr, klen, cb, u) <= 0)
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| 314 | goto err;
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| 315 | #endif
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| 316 | }
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| 317 | }
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| 318 |
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| 319 | /* if we have a certificate then write it out now */
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| 320 | if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
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| 321 | goto err;
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| 322 |
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| 323 | /*
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| 324 | * we are ignoring anything else that is loaded into the X509_INFO
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| 325 | * structure for the moment ... as I don't need it so I'm not coding it
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| 326 | * here and Eric can do it when this makes it into the base library --tjh
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| 327 | */
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| 328 |
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| 329 | ret = 1;
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| 330 |
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| 331 | err:
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| 332 | OPENSSL_cleanse(buf, PEM_BUFSIZE);
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| 333 | return (ret);
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| 334 | }
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