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e_idea.c 2.4 KB

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  1. /*
  2. * Copyright 1995-2021 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. * IDEA low level APIs are deprecated for public use, but still ok for internal
  11. * use where we're using them to implement the higher level EVP interface, as is
  12. * the case here.
  13. */
  14. #include "internal/deprecated.h"
  15. #include <stdio.h>
  16. #include "internal/cryptlib.h"
  17. #ifndef OPENSSL_NO_IDEA
  18. # include <openssl/evp.h>
  19. # include <openssl/objects.h>
  20. # include "crypto/evp.h"
  21. # include <openssl/idea.h>
  22. # include "evp_local.h"
  23. /* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */
  24. typedef struct {
  25. IDEA_KEY_SCHEDULE ks;
  26. } EVP_IDEA_KEY;
  27. static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  28. const unsigned char *iv, int enc);
  29. /*
  30. * NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
  31. * special case
  32. */
  33. static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
  34. const unsigned char *in, size_t inl)
  35. {
  36. BLOCK_CIPHER_ecb_loop()
  37. IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY, ctx)->ks);
  38. return 1;
  39. }
  40. BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks)
  41. BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
  42. BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
  43. BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
  44. 0, idea_init_key, NULL,
  45. EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
  46. static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  47. const unsigned char *iv, int enc)
  48. {
  49. if (!enc) {
  50. if (EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_OFB_MODE)
  51. enc = 1;
  52. else if (EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_CFB_MODE)
  53. enc = 1;
  54. }
  55. if (enc)
  56. IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY, ctx)->ks);
  57. else {
  58. IDEA_KEY_SCHEDULE tmp;
  59. IDEA_set_encrypt_key(key, &tmp);
  60. IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY, ctx)->ks);
  61. OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
  62. }
  63. return 1;
  64. }
  65. #endif