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-rw-r--r--lpass.c41
1 files changed, 23 insertions, 18 deletions
diff --git a/lpass.c b/lpass.c
index 6006a82..b7a752d 100644
--- a/lpass.c
+++ b/lpass.c
@@ -49,7 +49,7 @@ calc_entropy(const char *site,
const char *login,
uint64_t counter,
const char *master_pass,
- int passlen)
+ size_t passlen)
{
char salt[MAX_BUF + 1];
int saltlen = snprintf(salt, MAX_BUF, "%s%s%lx", site, login, counter);
@@ -73,7 +73,7 @@ calc_entropy(const char *site,
}
static int
-consume_entropy(char *generated_pass, BIGNUM *entropy, const char *charset, size_t maxlen)
+consume_entropy(char *pass, BIGNUM *entropy, const char *charset, size_t maxlen)
{
int retval = 1;
BN_CTX *ctx = BN_CTX_new();
@@ -89,7 +89,7 @@ consume_entropy(char *generated_pass, BIGNUM *entropy, const char *charset, size
retval = 0;
goto consume_entropy_cleanup;
}
- for (size_t passlen = strlen(generated_pass);
+ for (size_t passlen = strlen(pass);
passlen < maxlen;
passlen++) {
BN_div(entropy, bn_remainder, entropy, bn_charsetlen, ctx);
@@ -105,7 +105,7 @@ consume_entropy(char *generated_pass, BIGNUM *entropy, const char *charset, size
retval = 0;
goto consume_entropy_cleanup;
}
- generated_pass[passlen] = charset[remainder];
+ pass[passlen] = charset[remainder];
}
consume_entropy_cleanup:
BN_free(bn_remainder);
@@ -115,11 +115,11 @@ consume_entropy_cleanup:
}
static int
-insert_str_pseudo_randomly(char *generated_pass, BIGNUM *entropy, const char *s)
+insert_str_pseudo_randomly(char *pass, BIGNUM *entropy, const char *s)
{
int retval = 1;
char buf[MAX_BUF + 1];
- uint64_t passlen = (uint64_t) strlen(generated_pass);
+ uint64_t passlen = (uint64_t) strlen(pass);
BN_CTX *ctx = BN_CTX_new();
BIGNUM *bn_passlen = BN_new();
BIGNUM *bn_remainder = BN_new();
@@ -147,16 +147,17 @@ insert_str_pseudo_randomly(char *generated_pass, BIGNUM *entropy, const char *s)
}
/*
- * Idea here is to add the char `c` at position `remainder` in `generated_pass`.
- * 1. Copy the part that would need to be shifted into `buf`.
+ * Idea here is to add the char `c` at position `remainder` in
+ * `pass`. 1. Copy the part that would need to be shifted into
+ * `buf`.
*/
memset(buf, 0, sizeof(buf));
- strncpy(buf, &generated_pass[remainder], passlen - remainder);
+ strncpy(buf, &pass[remainder], passlen - remainder);
/*
- * 2. Add new character, then copy `buf` back into `generated_pass`.
+ * 2. Add new character, then copy `buf` back into `pass`.
*/
- generated_pass[remainder] = c;
- strncpy(&generated_pass[remainder + 1], buf, passlen - remainder);
+ pass[remainder] = c;
+ strncpy(&pass[remainder + 1], buf, passlen - remainder);
passlen++;
}
insert_str_pseudo_randomly_cleanup:
@@ -201,6 +202,7 @@ render_pass(BIGNUM *entropy, uint8_t allowed_charsets, char *out, size_t length)
{
char charset[MAX_BUF + 1];
size_t num_charsets = build_charset(charset, allowed_charsets);
+ out[0] = '\0';
if (consume_entropy(out, entropy, charset, length - num_charsets) == 0) {
return 0;
}
@@ -211,21 +213,25 @@ render_pass(BIGNUM *entropy, uint8_t allowed_charsets, char *out, size_t length)
*/
char str_to_add[num_charsets + 1];
memset(str_to_add, 0, sizeof(str_to_add));
- size_t c = 0;
+ size_t count = 0;
if (charsets_has_set(allowed_charsets, CHARSET_LOWER)
- && consume_entropy(&str_to_add[c++], entropy, CHAR_SUBSET_LOWER, 1) == 0) {
+ && consume_entropy(&str_to_add[count], entropy, CHAR_SUBSET_LOWER, 1) == 0) {
+ count++;
return 0;
}
if (charsets_has_set(allowed_charsets, CHARSET_UPPER)
- && consume_entropy(&str_to_add[c++], entropy, CHAR_SUBSET_UPPER, 1) == 0) {
+ && consume_entropy(&str_to_add[count], entropy, CHAR_SUBSET_UPPER, 1) == 0) {
+ count++;
return 0;
}
if (charsets_has_set(allowed_charsets, CHARSET_DIGITS)
- && consume_entropy(&str_to_add[c++], entropy, CHAR_SUBSET_DIGITS, 1) == 0) {
+ && consume_entropy(&str_to_add[count], entropy, CHAR_SUBSET_DIGITS, 1) == 0) {
+ count++;
return 0;
}
if (charsets_has_set(allowed_charsets, CHARSET_SYMBOLS)
- && consume_entropy(&str_to_add[c++], entropy, CHAR_SUBSET_SYMBOLS, 1) == 0) {
+ && consume_entropy(&str_to_add[count], entropy, CHAR_SUBSET_SYMBOLS, 1) == 0) {
+ count++;
return 0;
}
return insert_str_pseudo_randomly(out, entropy, str_to_add);
@@ -338,7 +344,6 @@ main(int argc, char *argv[])
}
char generated_pass[length + 1];
- memset(generated_pass, 0, sizeof(generated_pass));
if (render_pass(entropy, allowed_charsets, generated_pass, length) == 0) {
BN_free(entropy);
err("Failed to generate password");