a_digest.c 2.3 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. /* We need to use some engine deprecated APIs */
  10. #define OPENSSL_SUPPRESS_DEPRECATED
  11. #include <stdio.h>
  12. #include <time.h>
  13. #include <sys/types.h>
  14. #include "internal/cryptlib.h"
  15. #include <openssl/engine.h>
  16. #include <openssl/err.h>
  17. #include <openssl/evp.h>
  18. #include <openssl/buffer.h>
  19. #include <openssl/x509.h>
  20. #include "crypto/x509.h"
  21. #ifndef OPENSSL_NO_DEPRECATED_3_0
  22. int ASN1_digest(i2d_of_void *i2d, const EVP_MD *type, char *data,
  23. unsigned char *md, unsigned int *len)
  24. {
  25. int inl;
  26. unsigned char *str, *p;
  27. inl = i2d(data, NULL);
  28. if (inl <= 0) {
  29. ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
  30. return 0;
  31. }
  32. if ((str = OPENSSL_malloc(inl)) == NULL)
  33. return 0;
  34. p = str;
  35. i2d(data, &p);
  36. if (!EVP_Digest(str, inl, md, len, type, NULL)) {
  37. OPENSSL_free(str);
  38. return 0;
  39. }
  40. OPENSSL_free(str);
  41. return 1;
  42. }
  43. #endif
  44. int ossl_asn1_item_digest_ex(const ASN1_ITEM *it, const EVP_MD *md, void *asn,
  45. unsigned char *data, unsigned int *len,
  46. OSSL_LIB_CTX *libctx, const char *propq)
  47. {
  48. int i, ret = 0;
  49. unsigned char *str = NULL;
  50. EVP_MD *fetched_md = (EVP_MD *)md;
  51. i = ASN1_item_i2d(asn, &str, it);
  52. if (i < 0 || str == NULL)
  53. return 0;
  54. if (EVP_MD_get0_provider(md) == NULL) {
  55. #if !defined(OPENSSL_NO_ENGINE)
  56. ENGINE *tmpeng = ENGINE_get_digest_engine(EVP_MD_get_type(md));
  57. if (tmpeng != NULL)
  58. ENGINE_finish(tmpeng);
  59. else
  60. #endif
  61. fetched_md = EVP_MD_fetch(libctx, EVP_MD_get0_name(md), propq);
  62. }
  63. if (fetched_md == NULL)
  64. goto err;
  65. ret = EVP_Digest(str, i, data, len, fetched_md, NULL);
  66. err:
  67. OPENSSL_free(str);
  68. if (fetched_md != md)
  69. EVP_MD_free(fetched_md);
  70. return ret;
  71. }
  72. int ASN1_item_digest(const ASN1_ITEM *it, const EVP_MD *md, void *asn,
  73. unsigned char *data, unsigned int *len)
  74. {
  75. return ossl_asn1_item_digest_ex(it, md, asn, data, len, NULL, NULL);
  76. }