crypto/pkcs12/p12_crpt.c

   1 /*
   2  * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/core.h>
  13 #include <openssl/core_names.h>
  14 #include "crypto/evp.h"
  15 #include <openssl/pkcs12.h>
  16
  17 /* PKCS#12 PBE algorithms now in static table */
  18
  19 void PKCS12_PBE_add(void)
  20 {
  21 }
  22
  23 int PKCS12_PBE_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
  24                            ASN1_TYPE *param, const EVP_CIPHER *cipher,
  25                            const EVP_MD *md, int en_de,
  26                            OSSL_LIB_CTX *libctx, const char *propq)
  27 {
  28     PBEPARAM *pbe;
  29     int saltlen, iter, ret;
  30     unsigned char *salt;
  31     unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
  32     unsigned char *piv = iv;
  33
  34     if (cipher == NULL)
  35         return 0;
  36
  37     /* Extract useful info from parameter */
  38
  39     pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), param);
  40     if (pbe == NULL) {
  41         ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR);
  42         return 0;
  43     }
  44
  45     if (pbe->iter == NULL)
  46         iter = 1;
  47     else
  48         iter = ASN1_INTEGER_get(pbe->iter);
  49     salt = pbe->salt->data;
  50     saltlen = pbe->salt->length;
  51     if (!PKCS12_key_gen_utf8_ex(pass, passlen, salt, saltlen, PKCS12_KEY_ID,
  52                                 iter, EVP_CIPHER_get_key_length(cipher),
  53                                 key, md,
  54                                 libctx, propq)) {
  55         ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
  56         PBEPARAM_free(pbe);
  57         return 0;
  58     }
  59     if (EVP_CIPHER_get_iv_length(cipher) > 0) {
  60         if (!PKCS12_key_gen_utf8_ex(pass, passlen, salt, saltlen, PKCS12_IV_ID,
  61                                     iter, EVP_CIPHER_get_iv_length(cipher),
  62                                     iv, md,
  63                                     libctx, propq)) {
  64             ERR_raise(ERR_LIB_PKCS12, PKCS12_R_IV_GEN_ERROR);
  65             PBEPARAM_free(pbe);
  66             return 0;
  67         }
  68     } else {
  69         piv = NULL;
  70     }
  71     PBEPARAM_free(pbe);
  72     ret = EVP_CipherInit_ex(ctx, cipher, NULL, key, piv, en_de);
  73     OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
  74     OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
  75     return ret;
  76 }
  77
  78 int PKCS12_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
  79                         ASN1_TYPE *param, const EVP_CIPHER *cipher,
  80                         const EVP_MD *md, int en_de)
  81 {
  82     return PKCS12_PBE_keyivgen_ex(ctx, pass, passlen, param, cipher, md, en_de,
  83                                   NULL, NULL);
  84 }
  85