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 #include "error.h"
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <openssl/pem.h>
  13
  14 // endian crap for htobe16() [only needed
  15 // for base32_onion which should be moved] {
  16 #include <stdint.h> // OpenBSD needs this included before sys/endian.h
  17
  18 #if defined(LINUX_PORT) || defined(OSX) || defined(GENERIC)
  19   #include "linux.h"
  20 #else
  21   #include <sys/param.h> // OpenBSD needs this early on too
  22   #include <sys/endian.h>
  23 #endif
  24 // }
  25
  26 // TODO: Move to math.c?
  27 void base32_onion(char *dst, unsigned char *src) { // base32-encode hash
  28   uint8_t byte = 0,   // dst location
  29           offset = 0; // bit offset
  30   for(; byte < BASE32_ONIONLEN; offset += 5) {
  31     if(offset > 7) {
  32       offset -= 8;
  33       src++;
  34     }
  35     dst[byte++] = BASE32_ALPHABET[(htobe16(*(uint16_t*)src) >> (11-offset))
  36                                   & (uint16_t)0x001F];
  37   }
  38   dst[byte] = '\0';
  39 }
  40
  41 void print_onion(char *onion) { // pretty-print hash
  42   uint8_t i;
  43   char *s;
  44   #ifdef GENERIC
  45   s = malloc(PRINT_ONION_MAX);
  46   snprintf(s, PRINT_ONION_MAX, PRINT_ONION_STR, loop, onion);
  47   #else
  48   if (asprintf(&s, PRINT_ONION_STR, loop, onion) == -1)
  49                 error(X_OUT_OF_MEMORY);
  50   #endif
  51   for(i=0; i<strlen(s); i++)
  52     printf("-"); // TODO: use fputc()?
  53   printf("\n%s\n", s);
  54   for(i=0; i<strlen(s); i++)
  55     printf("-"); // TODO: use fputc()?
  56   printf("\n");
  57   free(s);
  58 }
  59
  60 void print_prkey(RSA *rsa) { // print PEM formatted RSA key
  61   BUF_MEM *buf;
  62   BIO *b = BIO_new(BIO_s_mem());
  63   PEM_write_bio_RSAPrivateKey(b, rsa, NULL, NULL, 0, NULL, NULL);
  64   BIO_get_mem_ptr(b, &buf);
  65   (void)BIO_set_close(b, BIO_NOCLOSE);
  66   BIO_free(b);
  67   char *dst = malloc(buf->length+1);
  68   strncpy(dst, buf->data, buf->length);
  69   dst[buf->length] = '\0';
  70   printf("%s", dst);
  71   BUF_MEM_free(buf);
  72 }
  73