hreese/exim-encrypt-dlfunc
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Wrote decrypt tool for sodium_crypto_box_seal plus matching tests.

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Lots of code cleanups.
This commit is contained in:
Heiko Reese
2021-09-12 02:06:10 +02:00
parent e1968e8f8c
commit e26daf675b
7 changed files with 319 additions and 126 deletions
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66
src/common.c
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@ -3,31 +3,83 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <sodium.h>
#include "common.h"
//#define MIN_KEY_SIZE (crypto_box_SECRETKEYBYTES < crypto_box_PUBLICKEYBYTES ? crypto_box_SECRETKEYBYTES : crypto_box_PUBLICKEYBYTES)
//#define MAX_KEY_SIZE (crypto_box_SECRETKEYBYTES > crypto_box_PUBLICKEYBYTES ? crypto_box_SECRETKEYBYTES : crypto_box_PUBLICKEYBYTES)
char *read_first_line(const char *filename) {
FILE *stream;
char *cipherstring;
size_t len = 0;
ssize_t nread;
bool input_is_stdin = false;
// open file
stream = fopen(filename, "r");
if (stream == NULL) {
perror("Error opening file");
exit(EXIT_FAILURE);
// open file (use stdin for '-')
if (!strncmp(filename, "-", 1)) {
stream = stdin;
input_is_stdin = true;
} else {
stream = fopen(filename, "r");
if (stream == NULL) {
fprintf(stderr, "[ERROR] Error opening file %s\n\n", filename);
exit(EXIT_FAILURE);
}
}
nread = getline(&cipherstring, &len, stream);
if (nread == -1) {
if (nread == -1 && !feof(stream)) {
perror("getline: ");
}
fclose(stream);
if (input_is_stdin == false) {
fclose(stream);
}
// remove trailing newline
cipherstring[strcspn(cipherstring, "\r\n")] = 0;
return cipherstring;
}
char *read_password_file(const char *filename, size_t keysize, size_t *length) {
FILE *stream;
char *contents;
ssize_t nread;
bool input_is_stdin = false;
contents = malloc(keysize + 1);
sodium_memzero(contents, keysize + 1);
// open file (use stdin for '-')
if (!strncmp(filename, "-", 1)) {
stream = stdin;
input_is_stdin = true;
} else {
stream = fopen(filename, "r");
if (stream == NULL) {
fprintf(stderr, "[ERROR] Error opening file %s\n\n", filename);
exit(EXIT_FAILURE);
}
}
nread = fread(contents, sizeof(char), keysize, stream);
if (nread < 0) {
fprintf(stderr, "[ERROR] reading from %s failed\n\n", filename);
exit(EXIT_FAILURE);
} else {
*length = (size_t) nread;
}
if (input_is_stdin == false) {
fclose(stream);
}
return contents;
}
int base64_decode_string(const char *input, unsigned char **outstring, size_t *outlen) {
size_t input_len = strlen(input);
size_t outmaxlen = input_len / 4 * 3;