Dear Shariful,
Could you please also provide a stack trace of your segfault?
On Tue, Sep 28, 2021 at 1:06 AM Shariful Alam <dipto...@gmail.com> wrote:
> Hello,
> I have the following simple RSA engine code from *e_dasync.c. * Following
> code compiles and works. Until now, I was under the impression that if I do
> not supply an alternative method in function *bind_dasync(), the *engine
> will use the default method. However, it doesn't seem to be the case. If I
> comment out line 37 and try to perform an encryption operation with the
> following command,
>
> *"openssl rsautl -encrypt -inkey public.pem -pubin -in msg.txt -out
> msg.enc -engine rsa-engine-new" *
>
> I get segmentation errors.
>
> Can anyone please tell me why this is happening?
>
>
> ==============================================================================
>
> 1. /* Engine Id and Name */
> 2. static const char *engine_rsa_id = "rsa-engine-new";
> 3. static const char *engine_rsa_name = "RSA engine for testing";
> 4.
> 5. // data encryption function
> 6. static int eng_rsa_pub_enc(int flen, const unsigned char *from,
> 7. unsigned char *to, RSA *rsa, int padding)
> {
> 8. printf("Encryption\n");
> 9. return 0;
> 10. }
> 11.
> 12. // signature verify
> 13. static int eng_rsa_pub_dec(int flen, const unsigned char *from,
> unsigned char *to, RSA *rsa, int padding){
> 14. printf("Signature verify:\n");
> 15. return 0;
> 16. }
> 17.
> 18. // signature
> 19. static int eng_rsa_priv_enc(int flen, const unsigned char *from,
> unsigned char *to, RSA *rsa, int padding){
> 20. printf("Signature:\n");
> 21. return 0;
> 22. }
> 23.
> 24. // data decryption
> 25. static int eng_rsa_priv_dec(int flen, const unsigned char *from,
> unsigned char *to, RSA *rsa, int padding){
> 26. printf("Decryption\n");
> 27. return 0;
> 28. }
> 29.
> 30.
> 31. static RSA_METHOD *test_rsa_method = NULL;
> 32.
> 33.
> 34. static int bind_dasync(ENGINE *e){
> 35. /* Setup RSA_METHOD */
> 36. if ((test_rsa_method = RSA_meth_new("Test RSA method", 0)) ==
> NULL
> 37. // || RSA_meth_set_pub_enc(test_rsa_method,
> eng_rsa_pub_enc) == 0
> 38. || RSA_meth_set_pub_dec(test_rsa_method, eng_rsa_pub_dec)
> == 0
> 39. || RSA_meth_set_priv_enc(test_rsa_method,
> eng_rsa_priv_enc) == 0
> 40. || RSA_meth_set_priv_dec(test_rsa_method,
> eng_rsa_priv_dec) == 0
> 41. ) {
> 42.
> 43. return 0;
> 44. }
> 45.
> 46. /* Ensure the dasync error handling is set up */
> 47.
> 48. if (!ENGINE_set_id(e, engine_rsa_id)
> 49. || !ENGINE_set_name(e, engine_rsa_name)
> 50. || !ENGINE_set_RSA(e, test_rsa_method)
> 51. ) {
> 52. return 0;
> 53. }
> 54. return 1;
> 55. }
> 56.
> 57. static int bind_helper(ENGINE *e, const char *id){
> 58. if (!bind_dasync(e)){
> 59. printf("2_Error: Inside Bind helper\n");
> 60. return 0;
> 61. }
> 62. return 1;
> 63. }
> 64.
> 65. IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
> 66. IMPLEMENT_DYNAMIC_CHECK_FN()
>
>
> ==============================================================================
>
> Regards,
> Shariful Alam
>
>
--
SY, Dmitry Belyavsky
