p_sign.c 2.0 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. #include <stdio.h>
  10. #include "internal/cryptlib.h"
  11. #include <openssl/evp.h>
  12. #include <openssl/objects.h>
  13. #include <openssl/x509.h>
  14. #include "crypto/evp.h"
  15. int EVP_SignFinal_ex(EVP_MD_CTX *ctx, unsigned char *sigret,
  16. unsigned int *siglen, EVP_PKEY *pkey, OSSL_LIB_CTX *libctx,
  17. const char *propq)
  18. {
  19. unsigned char m[EVP_MAX_MD_SIZE];
  20. unsigned int m_len = 0;
  21. int i = 0;
  22. size_t sltmp;
  23. EVP_PKEY_CTX *pkctx = NULL;
  24. *siglen = 0;
  25. if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_FINALISE)) {
  26. if (!EVP_DigestFinal_ex(ctx, m, &m_len))
  27. goto err;
  28. } else {
  29. int rv = 0;
  30. EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
  31. if (tmp_ctx == NULL) {
  32. ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
  33. return 0;
  34. }
  35. rv = EVP_MD_CTX_copy_ex(tmp_ctx, ctx);
  36. if (rv)
  37. rv = EVP_DigestFinal_ex(tmp_ctx, m, &m_len);
  38. EVP_MD_CTX_free(tmp_ctx);
  39. if (!rv)
  40. return 0;
  41. }
  42. sltmp = (size_t)EVP_PKEY_get_size(pkey);
  43. i = 0;
  44. pkctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
  45. if (pkctx == NULL)
  46. goto err;
  47. if (EVP_PKEY_sign_init(pkctx) <= 0)
  48. goto err;
  49. if (EVP_PKEY_CTX_set_signature_md(pkctx, EVP_MD_CTX_get0_md(ctx)) <= 0)
  50. goto err;
  51. if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
  52. goto err;
  53. *siglen = sltmp;
  54. i = 1;
  55. err:
  56. EVP_PKEY_CTX_free(pkctx);
  57. return i;
  58. }
  59. int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
  60. unsigned int *siglen, EVP_PKEY *pkey)
  61. {
  62. return EVP_SignFinal_ex(ctx, sigret, siglen, pkey, NULL, NULL);
  63. }