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implemented why2 crypto getters

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bit fucked the file
This commit is contained in:
Václav Šmejkal 2024-04-13 13:08:44 +02:00
parent 8f3af8c7d1
commit 60b437d4e8
Signed by: ENGO150
GPG Key ID: 4A57E86482968843
1 changed files with 47 additions and 14 deletions
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61
src/chat/crypto.c
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@ -56,12 +56,44 @@ void generate_prime(mpz_t x)
gmp_randclear(state);
}
void read_file(FILE *file, char **output)
{
//VARIABLES
int buffer_size;
char *buffer;
//GET LENGTH
fseek(file, 0, SEEK_END);
buffer_size = ftell(file);
rewind(file);
//READ
buffer = why2_calloc(buffer_size + 1, sizeof(char));
if (fread(buffer, buffer_size, 1, file) != 1) why2_die("Reading keyfile failed!");
buffer[buffer_size] = '\0';
//ASSIGN OUTPUT
*output = buffer;
}
//GLOBAL
void why2_chat_init_keys(void)
{
//KEY FILES
FILE *public; //TECHNICALLY, PUBLIC KEY CONTAINS ONLY THE MODULUS AND PRIVATE CONTAINS ONLY THE d
FILE *private;
//GET PATH TO KEY DIR
char *path = why2_replace(WHY2_CHAT_KEY_LOCATION, "{USER}", getenv("USER"));
//ALLOCATE THE KEY PATHS
char *public_path = why2_malloc(strlen(path) + strlen(WHY2_CHAT_PUB_KEY) + 3);
char *private_path = why2_malloc(strlen(path) + strlen(WHY2_CHAT_PRI_KEY) + 3);
//GET THE ACTUAL KEY PATHS
sprintf(public_path, "%s/%s%c", path, WHY2_CHAT_PUB_KEY, '\0');
sprintf(private_path, "%s/%s%c", path, WHY2_CHAT_PRI_KEY, '\0');
//CHECK IF KEYS EXIST
if (access(path, R_OK) != 0)
{
@ -94,31 +126,32 @@ void why2_chat_init_keys(void)
printf("Saving keys...\n");
//ALLOCATE THE KEY PATHS
char *public_path = why2_malloc(strlen(path) + strlen(WHY2_CHAT_PUB_KEY) + 3);
char *private_path = why2_malloc(strlen(path) + strlen(WHY2_CHAT_PRI_KEY) + 3);
//GET THE ACTUAL KEY PATHS
sprintf(public_path, "%s/%s%c", path, WHY2_CHAT_PUB_KEY, '\0');
sprintf(private_path, "%s/%s%c", path, WHY2_CHAT_PRI_KEY, '\0');
//WRITE THE KEYS INTO KEY-FILES
FILE *public = fopen(public_path, "w+");
FILE *private = fopen(private_path, "w+");
public = fopen(public_path, "w+");
private = fopen(private_path, "w+");
mpz_out_str(public, WHY2_CHAT_KEY_BASE, n);
mpz_out_str(private, WHY2_CHAT_KEY_BASE, d);
//KEYGEN DEALLOCATION
mpz_clears(p, q, e, d, n, phi_n, buffer_1, buffer_2, NULL);
why2_deallocate(public_path);
why2_deallocate(private_path);
fclose(public);
fclose(private);
} else
{
//OPEN FILES
public = fopen(public_path, "r");
private = fopen(private_path, "r");
//READ THE KEYS
read_file(public, &rsa_modulus);
read_file(private, &rsa_d);
}
//DEALLOCATION
why2_deallocate(path);
why2_deallocate(public_path);
why2_deallocate(private_path);
fclose(public);
fclose(private);
}
void why2_chat_deallocate_keys(void)