+++ /dev/null
-/*
-
- silcutil.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 1997 - 2008 Pekka Riikonen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
-*/
-/*
- * These are general utility functions that doesn't belong to any specific
- * group of routines.
- */
-/* $Id$ */
-
-#include "silc.h"
-
-/* Gets line from a buffer. Stops reading when a newline or EOF occurs.
- This doesn't remove the newline sign from the destination buffer. The
- argument begin is returned and should be passed again for the function. */
-
-int silc_gets(char *dest, int destlen, const char *src, int srclen, int begin)
-{
- static int start = 0;
- int i;
-
- memset(dest, 0, destlen);
-
- if (begin != start)
- start = 0;
-
- i = 0;
- for ( ; start <= srclen; i++, start++) {
- if (i > destlen) {
- silc_set_errno(SILC_ERR_OVERFLOW);
- return -1;
- }
-
- dest[i] = src[start];
-
- if (dest[i] == EOF) {
- silc_set_errno(SILC_ERR_EOF);
- return EOF;
- }
-
- if (dest[i] == '\n')
- break;
- }
- start++;
-
- return start;
-}
-
-/* Converts string to capital characters. */
-
-SilcBool silc_to_upper(const char *string, char *dest, SilcUInt32 dest_size)
-{
- int i;
-
- if (strlen(string) > dest_size) {
- silc_set_errno(SILC_ERR_OVERFLOW);
- return FALSE;
- }
-
- for (i = 0; i < strlen(string); i++)
- dest[i] = (char)toupper((int)string[i]);
-
- return TRUE;
-}
-
-/* Converts string to lower letter characters. */
-
-SilcBool silc_to_lower(const char *string, char *dest, SilcUInt32 dest_size)
-{
- int i;
-
- if (strlen(string) > dest_size) {
- silc_set_errno(SILC_ERR_OVERFLOW);
- return FALSE;
- }
-
- for (i = 0; i < strlen(string); i++)
- dest[i] = (char)tolower((int)string[i]);
-
- return TRUE;
-}
-
-/* Parse userfqdn string which is in user@fqdn format. */
-
-int silc_parse_userfqdn(const char *string,
- char *user, SilcUInt32 user_size,
- char *fqdn, SilcUInt32 fqdn_size)
-{
- SilcUInt32 tlen;
-
- if (!user && !fqdn) {
- silc_set_errno(SILC_ERR_INVALID_ARGUMENT);
- return 0;
- }
-
- memset(user, 0, user_size);
- memset(fqdn, 0, fqdn_size);
-
- if (!string) {
- silc_set_errno(SILC_ERR_INVALID_ARGUMENT);
- return 0;
- }
-
- if (string[0] == '@') {
- if (user)
- silc_strncat(user, user_size, string, strlen(string));
-
- return 1;
- }
-
- if (strchr(string, '@')) {
- tlen = strcspn(string, "@");
-
- if (user)
- silc_strncat(user, user_size, string, tlen);
-
- if (fqdn)
- silc_strncat(fqdn, fqdn_size, string + tlen + 1,
- strlen(string) - tlen - 1);
-
- return 2;
- }
-
- if (user)
- silc_strncat(user, user_size, string, strlen(string));
-
- return 1;
-}
-
-/* Parses command line. At most `max_args' is taken. Rest of the line
- will be allocated as the last argument if there are more than `max_args'
- arguments in the line. Note that the command name is counted as one
- argument and is saved. */
-
-void silc_parse_command_line(unsigned char *buffer,
- unsigned char ***parsed,
- SilcUInt32 **parsed_lens,
- SilcUInt32 **parsed_types,
- SilcUInt32 *parsed_num,
- SilcUInt32 max_args)
-{
- int i, len = 0;
- int argc = 0;
- const char *cp = (const char *)buffer;
- char *tmp;
-
- *parsed = silc_calloc(1, sizeof(**parsed));
- *parsed_lens = silc_calloc(1, sizeof(**parsed_lens));
-
- /* Get the command first */
- len = strcspn(cp, " ");
- tmp = silc_calloc(strlen(cp) + 1, sizeof(*tmp));
- if (!tmp)
- return;
- silc_to_upper(cp, tmp, strlen(cp));
- (*parsed)[0] = silc_calloc(len + 1, sizeof(char));
- memcpy((*parsed)[0], tmp, len);
- silc_free(tmp);
- (*parsed_lens)[0] = len;
- cp += len;
- while (*cp == ' ')
- cp++;
- argc++;
-
- /* Parse arguments */
- if (strchr(cp, ' ') || strlen(cp) != 0) {
- for (i = 1; i < max_args; i++) {
-
- if (i != max_args - 1)
- len = strcspn(cp, " ");
- else
- len = strlen(cp);
- while (len && cp[len - 1] == ' ')
- len--;
- if (!len)
- break;
-
- *parsed = silc_realloc(*parsed, sizeof(**parsed) * (argc + 1));
- *parsed_lens = silc_realloc(*parsed_lens,
- sizeof(**parsed_lens) * (argc + 1));
- (*parsed)[argc] = silc_calloc(len + 1, sizeof(char));
- memcpy((*parsed)[argc], cp, len);
- (*parsed_lens)[argc] = len;
- argc++;
-
- cp += len;
- if (strlen(cp) == 0)
- break;
- else
- while (*cp == ' ')
- cp++;
- }
- }
-
- /* Save argument types. Protocol defines all argument types but
- this implementation makes sure that they are always in correct
- order hence this simple code. */
- *parsed_types = silc_calloc(argc, sizeof(**parsed_types));
- for (i = 0; i < argc; i++)
- (*parsed_types)[i] = i;
-
- *parsed_num = argc;
-}
-
-/* Formats arguments to a string and returns it after allocating memory
- for it. It must be remembered to free it later. */
-
-char *silc_format(char *fmt, ...)
-{
- va_list args;
- char buf[8192];
-
- va_start(args, fmt);
- silc_vsnprintf(buf, sizeof(buf), fmt, args);
- va_end(args);
-
- return silc_strdup(buf);
-}
-
-/* Creates fingerprint from data, usually used with SHA1 digests */
-
-char *silc_fingerprint(const unsigned char *data, SilcUInt32 data_len)
-{
- unsigned char *fingerprint, *cp;
- unsigned int len, blocks, i;
-
- if (!data || !data_len) {
- silc_set_errno(SILC_ERR_INVALID_ARGUMENT);
- return NULL;
- }
-
- if (data_len >= 256)
- data_len = 255;
-
- /* Align and calculate total length */
- len = ((data_len + 19) / 20) * 20;
- blocks = (len / 10);
- len = (len * 2) + ((blocks - 1) * 2) + (4 * blocks) + 2 + 1;
-
- cp = fingerprint = silc_calloc(len, sizeof(*fingerprint));
- if (!cp)
- return NULL;
-
- for (i = 0; i < data_len; i++) {
- silc_snprintf(cp, len, "%02X", data[i]);
- cp += 2;
- len -= 2;
-
- if ((i + 1) % 2 == 0)
- silc_snprintf(cp++, len--, " ");
- if ((i + 1) % 10 == 0)
- silc_snprintf(cp++, len--, " ");
- }
- i--;
- if ((i + 1) % 10 == 0)
- *(--cp) = '\0';
- if ((i + 1) % 2 == 0)
- *(--cp) = '\0';
-
- return fingerprint;
-}
-
-/* Return TRUE if the `data' is ASCII string. */
-
-SilcBool silc_string_is_ascii(const unsigned char *data, SilcUInt32 data_len)
-{
- int i;
-
- for (i = 0; i < data_len; i++) {
- if (!isascii(data[i]))
- return FALSE;
- }
-
- return TRUE;
-}
-
-/* Displays input prompt on command line and takes input data from user */
-
-char *silc_get_input(const char *prompt, SilcBool echo_off)
-{
-#ifdef SILC_UNIX
- int fd;
- char input[2048];
-
- if (echo_off) {
- char *ret = NULL;
-#ifdef HAVE_TERMIOS_H
- struct termios to;
- struct termios to_old;
-
- fd = open("/dev/tty", O_RDONLY);
- if (fd < 0) {
- silc_set_errno_posix(errno);
- return NULL;
- }
-
- signal(SIGINT, SIG_IGN);
-
- /* Get terminal info */
- tcgetattr(fd, &to);
- to_old = to;
-
- /* Echo OFF, and assure we can prompt and get input */
- to.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
- to.c_lflag |= ICANON;
- to.c_cc[VMIN] = 255;
- tcsetattr(fd, TCSANOW, &to);
-
- memset(input, 0, sizeof(input));
-
- printf("%s", prompt);
- fflush(stdout);
-
- if ((read(fd, input, sizeof(input))) < 0) {
- silc_set_errno_posix(errno);
- tcsetattr(fd, TCSANOW, &to_old);
- return NULL;
- }
-
- if (strlen(input) <= 1) {
- tcsetattr(fd, TCSANOW, &to_old);
- silc_set_errno(SILC_ERR_EOF);
- return NULL;
- }
-
- if (strchr(input, '\n'))
- *strchr(input, '\n') = '\0';
-
- /* Restore old terminfo */
- tcsetattr(fd, TCSANOW, &to_old);
- signal(SIGINT, SIG_DFL);
-
- ret = silc_memdup(input, strlen(input));
- memset(input, 0, sizeof(input));
-#endif /* HAVE_TERMIOS_H */
- return ret;
- } else {
- fd = open("/dev/tty", O_RDONLY);
- if (fd < 0) {
- silc_set_errno_posix(errno);
- return NULL;
- }
-
- memset(input, 0, sizeof(input));
-
- printf("%s", prompt);
- fflush(stdout);
-
- if ((read(fd, input, sizeof(input))) < 0) {
- silc_set_errno_posix(errno);
- return NULL;
- }
-
- if (strlen(input) <= 1) {
- silc_set_errno(SILC_ERR_EOF);
- return NULL;
- }
-
- if (strchr(input, '\n'))
- *strchr(input, '\n') = '\0';
-
- return silc_strdup(input);
- }
-#else
- return NULL;
-#endif /* SILC_UNIX */
-}
-
-/* Hexdump */
-
-void silc_hexdump(const unsigned char *data, SilcUInt32 data_len,
- FILE *output)
-{
- int i, k;
- int off, pos, count;
- int len = data_len;
-
- k = 0;
- pos = 0;
- count = 16;
- off = len % 16;
- while (1) {
- if (off) {
- if ((len - pos) < 16 && (len - pos <= len - off))
- count = off;
- } else {
- if (pos == len)
- count = 0;
- }
- if (off == len)
- count = len;
-
- if (count)
- fprintf(output, "%08X ", k++ * 16);
-
- for (i = 0; i < count; i++) {
- fprintf(output, "%02X ", data[pos + i]);
-
- if ((i + 1) % 4 == 0)
- fprintf(output, " ");
- }
-
- if (count && count < 16) {
- int j;
-
- for (j = 0; j < 16 - count; j++) {
- fprintf(output, " ");
-
- if ((j + count + 1) % 4 == 0)
- fprintf(output, " ");
- }
- }
-
- for (i = 0; i < count; i++) {
- char ch;
-
- if (data[pos] < 32 || data[pos] >= 127)
- ch = '.';
- else
- ch = data[pos];
-
- fprintf(output, "%c", ch);
- pos++;
- }
-
- if (count)
- fprintf(output, "\n");
-
- if (count < 16)
- break;
- }
-}
-
-/* Convert hex string to data. Each hex number must have two characters. */
-
-SilcBool silc_hex2data(const char *hex, unsigned char *data,
- SilcUInt32 data_size, SilcUInt32 *ret_data_len)
-{
- char *cp = (char *)hex;
- unsigned char l, h;
- int i;
-
- if (data_size < strlen(hex) / 2) {
- silc_set_errno(SILC_ERR_OVERFLOW);
- return FALSE;
- }
-
- for (i = 0; i < strlen(hex) / 2; i++) {
- h = *cp++;
- l = *cp++;
-
- h -= h < 'A' ? '0' : 'A' - 10;
- l -= l < 'A' ? '0' : 'A' - 10;
-
- data[i] = (h << 4) | (l & 0xf);
- }
-
- if (ret_data_len)
- *ret_data_len = i;
-
- return TRUE;
-}
-
-/* Converts binary data to HEX string */
-
-SilcBool silc_data2hex(const unsigned char *data, SilcUInt32 data_len,
- char *hex, SilcUInt32 hex_size)
-{
- unsigned char l, h;
- char *cp = hex;
- int i;
-
- if (hex_size - 1 < data_len * 2) {
- silc_set_errno(SILC_ERR_OVERFLOW);
- return FALSE;
- }
-
- memset(hex, 0, hex_size);
-
- for (i = 0; i < data_len; i++) {
- l = data[i];
- h = l >> 4;
- l &= 0xf;
-
- *cp++ = h + (h > 9 ? 'A' - 10 : '0');
- *cp++ = l + (l > 9 ? 'A' - 10 : '0');
- }
-
- return TRUE;
-}
projects / crypto.git / blobdiff