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pem_sign.c 1.2 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 <openssl/pem.h>
  15. int PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)
  16. {
  17. return EVP_DigestInit_ex(ctx, type, NULL);
  18. }
  19. int PEM_SignUpdate(EVP_MD_CTX *ctx,
  20. const unsigned char *data, unsigned int count)
  21. {
  22. return EVP_DigestUpdate(ctx, data, count);
  23. }
  24. int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
  25. unsigned int *siglen, EVP_PKEY *pkey)
  26. {
  27. unsigned char *m;
  28. int i, ret = 0;
  29. unsigned int m_len;
  30. m = OPENSSL_malloc(EVP_PKEY_get_size(pkey));
  31. if (m == NULL)
  32. goto err;
  33. if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0)
  34. goto err;
  35. i = EVP_EncodeBlock(sigret, m, m_len);
  36. *siglen = i;
  37. ret = 1;
  38. err:
  39. /* ctx has been zeroed by EVP_SignFinal() */
  40. OPENSSL_free(m);
  41. return ret;
  42. }