Hello, Hope you guys are doing well. I'm trying to develop an RSA engine. My engine was somewhat working until I try to integrate my engine with an apache httpd server. After installing the httpd from the source code, it turns out that, I can't compile my engine anymore. I get the following error while I try to compile (it was compiling before and I did not make any changes to my engine code).
============================== *$gcc -fPIC -c r_engine.c* *r_engine.c:29:8: error: redefinition of ‘struct rsa_meth_st’ struct rsa_meth_st { ^In file included from /usr/include/openssl/crypto.h:131:0, from r_engine.c:7:/usr/include/openssl/ossl_typ.h:147:16: note: originally defined here typedef struct rsa_meth_st RSA_METHOD;* ============================= and my *struct rsa_meth_st *looks like the following, ================================================================================ *struct rsa_meth_st { const char *name; int (*rsa_pub_enc) (int flen, const unsigned char *from, unsigned char *to, RSA *rsa, int padding); int (*rsa_pub_dec) (int flen, const unsigned char *from, unsigned char *to, RSA *rsa, int padding); int (*rsa_priv_enc) (int flen, const unsigned char *from, unsigned char *to, RSA *rsa, int padding); int (*rsa_priv_dec) (int flen, const unsigned char *from, unsigned char *to, RSA *rsa, int padding); int (*rsa_mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx); int (*bn_mod_exp) (BIGNUM *r, const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); int (*init) (RSA *rsa); int (*finish) (RSA *rsa); int flags; char *app_data; int (*rsa_sign) (int type, const unsigned char *m, unsigned int m_length, unsigned char *sigret, unsigned int *siglen, const RSA *rsa); int (*rsa_verify) (int dtype, const unsigned char *m, unsigned int m_length, const unsigned char *sigbuf, unsigned int siglen, const RSA *rsa); int (*rsa_keygen) (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);};* ================================================================================= My sample skeleton code is here https://pastebin.com/uNXYknEA Can anyone please tell me what I'm I doing wrong? Regards, Shariful Alam