src/print.c

   1 // printing functions for shallot
   2
   3 #include "config.h"
   4
   5 #include "print.h"
   6 #include "defines.h"
   7 #include "globals.h"
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <openssl/pem.h>
  12
  13 // endian crap for htobe16() [only needed
  14 // for base32_onion which should be moved] {
  15 #include <stdint.h> // OpenBSD needs this included before sys/endian.h
  16
  17 #if defined(LINUX_PORT) || defined(OSX) || defined(GENERIC)
  18   #include "linux.h"
  19 #else
  20   #include <sys/param.h> // OpenBSD needs this early on too
  21   #include <sys/endian.h>
  22 #endif
  23 // }
  24
  25 // TODO: Move to math.c?
  26 void base32_onion(char *dst, unsigned char *src) { // base32 encode hash
  27   uint8_t byte = 0,   // dst location
  28           offset = 0; // bit offset
  29   for(; byte < BASE32_ONIONLEN; offset += 5) {
  30     if(offset > 7) {
  31       offset -= 8;
  32       src++;
  33     }
  34     dst[byte++] = BASE32_ALPHABET[(htobe16(*(uint16_t*)src) >> (11-offset))
  35                                   & (uint16_t)0x001F];
  36   }
  37   dst[byte] = '\0';
  38 }
  39
  40 void print_onion(char *onion) { // pretty print hash
  41   uint8_t i;
  42   char *s;
  43   #ifdef GENERIC
  44   s = malloc(PRINT_ONION_MAX);
  45   snprintf(s, PRINT_ONION_MAX, PRINT_ONION_STR, loop, onion);
  46   #else
  47   asprintf(&s, PRINT_ONION_STR, loop, onion);
  48   #endif
  49   for(i=0; i<strlen(s); i++)
  50     printf("-"); // TODO: use fputc()?
  51   printf("\n%s\n", s);
  52   for(i=0; i<strlen(s); i++)
  53     printf("-"); // TODO: use fputc()?
  54   printf("\n");
  55   free(s);
  56 }
  57
  58 void print_prkey(RSA *rsa) { // print PEM formated RSA key
  59   BUF_MEM *buf;
  60   BIO *b = BIO_new(BIO_s_mem());
  61   PEM_write_bio_RSAPrivateKey(b, rsa, NULL, NULL, 0, NULL, NULL);
  62   BIO_get_mem_ptr(b, &buf);
  63   BIO_set_close(b, BIO_NOCLOSE);
  64   BIO_free(b);
  65   char *dst = malloc(buf->length+1);
  66   strncpy(dst, buf->data, buf->length);
  67   dst[buf->length] = '\0';
  68   printf("%s", dst);
  69   BUF_MEM_free(buf);
  70 }
  71