I am working in Windows environment. I am implementing a Dll which is used by an console application. My implementation of a dll(say D) includes static library(say L). Also static library L includes Openssl.lib. I am seeing linker errors while building DLL(D) which are pointing to Openssl.lib.
Inclusion of Openssl Header files in xxxx.cpp file is as:
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/aes.h>
int openssl_hmac_vector(const EVP_MD *type, const u8 *key,
size_t key_len, size_t num_elem,
const u8 *addr[], const size_t *len, u8 *mac,
unsigned int mdlen)
{
HMAC_CTX ctx;
size_t i;
int res;
HMAC_CTX_init(&ctx);
#if OPENSSL_VERSION_NUMBER < 0x00909000
HMAC_Init_ex(&ctx, key, key_len, type, NULL);
#else /* openssl < 0.9.9 */
if (HMAC_Init_ex(&ctx, key, key_len, type, NULL) != 1)
return -1;
#endif /* openssl < 0.9.9 */
for (i = 0; i < num_elem; i++)
HMAC_Update(&ctx, addr[i], len[i]);
#if OPENSSL_VERSION_NUMBER < 0x00909000
HMAC_Final(&ctx, mac, &mdlen);
res = 1;
#else /* openssl < 0.9.9 */
res = HMAC_Final(&ctx, mac, &mdlen);
#endif /* openssl < 0.9.9 */
HMAC_CTX_cleanup(&ctx);
return res == 1 ? 0 : -1;
}
Observations: 1. Did not see any build errors while building library(L) by including Openssl.lib 2. If I change Library L output to Dynamic from static(marked with red in below image) , I am seeing linker errors in Openssl.lib
Sources file of Library L:
[![enter image description here][1]][1]
Linker errors: Error 12 error LNK2001: unresolved external symbol _HMAC_CTX_cleanup@4
Error 13 error LNK2001: unresolved external symbol _HMAC_Final@12
Error 15 error LNK2001: unresolved external symbol _HMAC_Init_ex@20
Error 16 error LNK2001: unresolved external symbol _HMAC_CTX_init@4
Please suggest me the changes in my code to resolve the linker errors.
Thanks
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