openssl_1_1_0_offset.c

#include <ctype.h>
#include <crypto/bio/bio_lcl.h>
#include <openssl/crypto.h>
#include <ssl/ssl_locl.h>
#include <stddef.h>
#include <stdio.h>

#define SSL_STRUCT_OFFSETS          \
    X(ssl_st, version)              \
    X(ssl_st, session)              \
    X(ssl_st, s3)                   \
    X(ssl_st, rbio)                 \
    X(ssl_st, wbio)                 \
    X(ssl_st, server)                    \
    X(ssl_session_st, master_key)   \
    X(ssl3_state_st, client_random) \
    X(ssl_session_st, cipher)       \
    X(ssl_session_st, cipher_id)    \
    X(ssl_cipher_st, id)            \
    X(bio_st, num)

void toUpper(char *s) {
    int i = 0;
    while (s[i] != '\0') {
        putchar(toupper(s[i]));
        i++;
    }
}

void format(char *struct_name, char *field_name, size_t offset) {
    printf("// %s->%s\n", struct_name, field_name);
    printf("#define ");
    toUpper(struct_name);
    printf("_");
    toUpper(field_name);
    printf(" 0x%lx\n\n", offset);
}

int main() {
    printf("/* OPENSSL_VERSION_TEXT: %s */\n", OPENSSL_VERSION_TEXT);
    printf("/* OPENSSL_VERSION_NUMBER: %d */\n\n", OPENSSL_VERSION_NUMBER);

#define X(struct_name, field_name) \
    format(#struct_name, #field_name, offsetof(struct struct_name, field_name));
    SSL_STRUCT_OFFSETS
#undef X

    return 0;
}