#include <stdio.h>
#include <stdint.h>
#include <string.h>

#include "lilliput-ae.h"

#include "test-helpers.h"


struct vector
{
    char *name;
    uint8_t key[KEY_BYTES];
    uint8_t nonce[NONCE_BYTES];
    size_t auth_len;
    uint8_t *auth;
    size_t message_len;
    uint8_t *message;
};

typedef struct vector vector;


/* Keys and nonces generated with /dev/urandom. */

const vector VECTORS[] = {
    {
        .name = "short",
        .key = {
            0x06, 0xf4, 0x60, 0x05, 0x12, 0x4b, 0xfd, 0xda,
            0x8f, 0xfc, 0x55, 0x1c, 0xaa, 0xef, 0x81, 0x60,
            0x08, 0xb3, 0xe0, 0xa6, 0xad, 0xcb, 0x68, 0x05
        },
        .nonce = {
            0xcd, 0x6f, 0x24, 0xe1, 0xf8, 0xcd, 0x64, 0xde,
            0x18, 0x2f, 0x92, 0xab, 0xdb, 0xfa, 0xff
        },
        .auth_len = 8,
        .auth = (uint8_t*)"deadbeef",
        .message_len = 4,
        .message = (uint8_t[]){
            0xde, 0xad, 0xbe, 0xef
        }
    },
    {
        .name = "block-sized",
        .key = {
            0xa0, 0x3d, 0x36, 0xef, 0xef, 0xdd, 0x72, 0xad,
            0x35, 0xa1, 0x2b, 0xe2, 0x3d, 0x1e, 0x43, 0x94,
            0x38, 0x0f, 0x00, 0x4d, 0x8d, 0x78, 0xbc, 0x02
        },
        .nonce = {
            0xcd, 0x7d, 0xb0, 0xa0, 0x62, 0xdf, 0xda, 0x0a,
            0x23, 0x7a, 0x17, 0x32, 0x60, 0x42, 0xef
        },
        .auth_len = 13,
        .auth = (uint8_t*)"some metadata",
        .message_len = 2*BLOCK_BYTES,
        .message = (uint8_t*)"32-byte long, i.e. 2*BLOCK_BYTES"
    },
    {
        .name = "arbitrarily long",
        .key = {
            0x96, 0x6f, 0x23, 0x89, 0xb4, 0xa4, 0x00, 0x7c,
            0x9a, 0x9f, 0x34, 0x01, 0xb0, 0x73, 0x27, 0x56,
            0x09, 0xce, 0x17, 0xeb, 0xdc, 0xd6, 0xa7, 0x06
        },
        .nonce = {
            0x59, 0x41, 0xa7, 0x53, 0x0f, 0xde, 0xf1, 0xb1,
            0xca, 0xd5, 0x80, 0xc4, 0x1c, 0x16, 0x2b
        },
        .auth_len = 30,
        .auth = (uint8_t*)"a bunch of associated metadata",
        .message_len = 59,
        .message = (uint8_t*)"here comes the placeholder: foobar ipsum dolor sit baz quux"
    }
};


int main()
{
    int diff = 0;

    for (const vector *v=VECTORS; v<ARRAY_END(VECTORS); v++)
    {
        uint8_t ciphertext[v->message_len];
        uint8_t tag[TAG_BYTES];

        lilliput_ae_encrypt(
            v->message_len, v->message,
            v->auth_len, v->auth,
            v->key, v->nonce,
            ciphertext,
            tag
        );

        uint8_t deciphered[v->message_len];
        bool valid = lilliput_ae_decrypt(
            v->message_len, ciphertext,
            v->auth_len, v->auth,
            v->key, v->nonce, tag,
            deciphered
        );

        if (!valid)
        {
            REPORT_INVALID(v->name);
            diff++;
            continue;
        }

        if (memcmp(deciphered, v->message, v->message_len) != 0)
        {
            REPORT_DIFFERENCE(v->name, "deciphered plaintext");
            diff++;
            continue;
        }
    }

    return diff;
}