Given the coredump stack trace you provide, it looks like
ctx->cipher->do_cipher == NULL, while it should be a valid pointer to
a cypher-specific en/decrypt function (see evp_cipher_st typedef in
evp.h).
Please check with assert() or debugger if this member != NULL before
entering the decrypt function.
----------
AM: Indeed it is NULL. Thanks for pointing out the cause. I checked the code
of EVP_CipherUpdate in crypto/evp/evp_enc.c and got an idea how it works.
If, like I assume, it *is* NULL, that
means the INIT went wrong.
--------
AM: Now, I will look into the init routines closely. All along I was looking
at a wrong place.
Since you do not check error codes here (or
cut away that code to shorten the example), I don't know what error
was returned by the ...init_ex() call there.
By the way, what is the value of the 'DECRYPT' define? (last parameter
to your Init_ex()) Should be 0 or 1.
----------
Yes, #define DECRYPT 0
is present in the code.
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