CODEWITHSUNDEEP
cgccopenssl
Mali M
Mali M

Reputation: 33

I get the error undefined reference to `PKCS5_PBKDF2_HMAC_SHA1'. How do I fix it?

I get this error when I try to compile the below code. I installed openssl libraries. I don't know programming. The error is: "ccS3fmrV.o:wa_pbkdf2.c:(.text+0x1e3): undefined reference to `PKCS5_PBKDF2_HMAC_SHA1' collect2.exe: error: ld returned 1 exit status

Can someone help? Thanks.

#include <stdio.h>
#include <string.h>
#include <openssl/x509.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>

int main(int argc, char *argv[])
{
	unsigned char pass[1024];      // passphrase read from stdin
	unsigned char salt[1024];      // salt 
	int salt_len;                  // salt length
	int ic;                        // iteration
	unsigned char result[1024];    // result
	FILE *fp_salt;

	if ( argc != 3 ) {
		fprintf(stderr, "usage: %s salt_file iteration < passwd_file > binary_key_file \n", argv[0]);
		exit(1);
	}

	ic = atoi(argv[2]);
  
	fp_salt = fopen(argv[1], "r");
	if(!fp_salt) {
		fprintf(stderr, "error opening salt file: %s\n", argv[1]);
		exit(2);
	}

	salt_len=0;
	int ch;	
	while((ch = fgetc(fp_salt)) != EOF) {		
		salt[salt_len++] = (unsigned char)ch;		
	}	

    fclose(fp_salt);	
   
    fgets(pass, 1024, stdin);
    if ( pass[strlen(pass)-1] == '\n' )
		pass[strlen(pass)-1] = '\0';
  
	PKCS5_PBKDF2_HMAC_SHA1(pass, strlen(pass), salt, salt_len, ic, 16, result);

	fwrite(result, 1, 16, stdout);

	return(0);
}

Upvotes: 3

Views: 3877

Answers (1)

jww
jww

Reputation: 102376

I get the error undefined reference to `PKCS5_PBKDF2_HMAC_SHA1'. How do I fix it?

PKCS5_PBKDF2_HMAC_SHA1 was added in 1.0.0 (IIRC). So be sure you are using OpenSSL 1.0.0 or higher. There's an OpenSSL man page on PKCS5_PBKDF2_HMAC_SHA1, but it has an empty history.

If you are using OpenSSL 1.0.1, then be sure you are including libcrypto for the linker. Your compile/link command should look something like:

gcc wa_pbkdf2.c -o wa_pbkdf2.exe -lcrypto

Upvotes: 5

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