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annotate auth/hash_password.c @ 273:e02e2036ef84 default tip

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add Layer 2 JRPG component system Add reusable content and window modals, an isolated component sandbox, shared cyberpunk scroll areas, production-safe cache freshness, and server-rendered JRPG panel state. Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Sat, 08 Aug 2026 02:08:08 -0700
parents 04fee26ecce0
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1 #include "auth/auth_crypto.h"
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2
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3 #include <openssl/crypto.h>
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4
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5 #include <stdio.h>
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6 #include <string.h>
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7 #include <termios.h>
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8 #include <unistd.h>
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9
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10 #define PW_MAX AUTH_CRYPTO_PASSWORD_MAX_BYTES
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11
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12 static int read_password(int fd, char *buf, size_t capacity)
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13 {
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14 size_t len = 0;
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15 int too_long = 0;
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16 for (;;)
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17 {
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18 unsigned char c;
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19 int r = (int)read(fd, &c, 1);
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20 if (r < 0)
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21 return -1;
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22 if (r == 0)
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23 break;
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24 if (c == '\n' || c == '\r')
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25 break;
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26 if (len + 1 >= capacity)
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27 {
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28 too_long = 1;
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29 continue;
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30 }
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31 buf[len++] = (char)c;
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32 }
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33 buf[len] = '\0';
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34 return too_long ? -2 : (int)len;
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35 }
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36
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37 int main(int argc, char **argv)
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38 {
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39 (void)argc;
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40 (void)argv;
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41
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42 int fd = STDIN_FILENO;
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43 int is_tty = isatty(fd);
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44 struct termios old_term;
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45 struct termios new_term;
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46 int restored = 0;
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47
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48 if (is_tty)
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49 {
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50 if (tcgetattr(fd, &old_term) != 0)
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51 {
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52 fprintf(stderr, "hash_password: failed to get terminal attributes\n");
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53 return 1;
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54 }
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55 new_term = old_term;
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56 new_term.c_lflag &= (tcflag_t)~(ECHO | ECHOE | ECHOK | ECHONL);
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57 new_term.c_lflag |= ICANON;
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58 if (tcsetattr(fd, TCSAFLUSH, &new_term) != 0)
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59 {
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60 fprintf(stderr, "hash_password: failed to disable echo\n");
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61 return 1;
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62 }
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63 restored = 1;
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64 fprintf(stderr, "Password: ");
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65 fflush(stderr);
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66 }
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67
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68 char pw[PW_MAX + 1];
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69 memset(pw, 0, sizeof(pw));
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70 int n = read_password(fd, pw, sizeof(pw));
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71
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72 if (restored)
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73 {
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74 tcsetattr(fd, TCSAFLUSH, &old_term);
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75 fprintf(stderr, "\n");
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76 }
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77
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78 if (n == -2)
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79 {
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80 fprintf(stderr, "hash_password: %s\n",
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81 Auth_Crypto_Result_String(AUTH_CRYPTO_PASSWORD_TOO_LONG));
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82 OPENSSL_cleanse(pw, sizeof(pw));
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83 return 1;
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84 }
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85 if (n < 0)
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86 {
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87 fprintf(stderr, "hash_password: read error\n");
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88 OPENSSL_cleanse(pw, sizeof(pw));
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89 return 1;
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90 }
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91 if (n == 0)
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92 {
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93 fprintf(stderr, "hash_password: empty password\n");
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94 OPENSSL_cleanse(pw, sizeof(pw));
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95 return 1;
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96 }
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97
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98 char encoded_hash[AUTH_CRYPTO_PASSWORD_HASH_ENCODED_SIZE];
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99 Auth_Crypto_Result result =
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100 Auth_Crypto_Password_Hash(pw, encoded_hash, sizeof(encoded_hash));
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101 OPENSSL_cleanse(pw, sizeof(pw));
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102
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103 if (result != AUTH_CRYPTO_OK)
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104 {
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105 fprintf(stderr, "hash_password: %s\n", Auth_Crypto_Result_String(result));
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106 return 1;
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107 }
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108
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109 puts(encoded_hash);
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110 return 0;
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111 }