* tools/input.c, tools/input.h, tools/output.c, tools/output.h,

tools/parse.c, tools/parse.h, tools/misc.c, tools/misc.h: Moved
parts ov sexp-conv.c to separate files

Rev: src/nettle/tools/Makefile.am:1.3
Rev: src/nettle/tools/input.c:1.1
Rev: src/nettle/tools/input.h:1.1
Rev: src/nettle/tools/misc.c:1.1
Rev: src/nettle/tools/misc.h:1.1
Rev: src/nettle/tools/output.c:1.1
Rev: src/nettle/tools/output.h:1.1
Rev: src/nettle/tools/parse.c:1.1
Rev: src/nettle/tools/parse.h:1.1
Rev: src/nettle/tools/sexp-conv.c:1.13

src/nettle/tools/Makefile.am

@@ -9,4 +9,7 @@ bin_PROGRAMS = sexp-conv
 
 LDADD = -lnettle
 
-sexp_conv_SOURCES = sexp-conv.c getopt.c getopt1.c
+EXTRA_DIST = misc.h input.h output.h parse.h
+
+sexp_conv_SOURCES = sexp-conv.c input.c output.c parse.c \
+	getopt.c getopt1.c misc.c

src/nettle/tools/input.c

+/* input.c */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002, 2003 Niels Mller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library 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 Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#include "input.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+void
+sexp_input_init(struct sexp_input *input, FILE *f)
+{
+  input->f = f;
+  input->coding = NULL;
+}
+
+static void
+sexp_get_raw_char(struct sexp_input *input)
+{
+  int c = getc(input->f);
+  
+  if (c < 0)
+    {
+      if (ferror(input->f))
+	die("Read error: %s\n", strerror(errno));
+      
+      input->ctype = SEXP_EOF_CHAR;
+    }
+  else
+    {
+      input->ctype = SEXP_NORMAL_CHAR;
+      input->c = c;
+    }
+}
+
+void
+sexp_get_char(struct sexp_input *input)
+{
+  if (input->coding)
+    for (;;)
+      {
+	int done;
+
+	sexp_get_raw_char(input);
+	if (input->ctype == SEXP_EOF_CHAR)
+	  die("Unexpected end of file in coded data.\n");
+
+	if (input->c == input->terminator)
+	  {
+	    input->ctype = SEXP_END_CHAR;
+	    return;
+	  }
+
+	done = 1;
+
+	/* Decodes in place. Should always work, when we decode one
+	 * character at a time. */
+	if (!input->coding->decode_update(&input->state,
+					  &done, &input->c,
+					  1, &input->c))
+	  die("Invalid coded data.\n");
+	
+	if (done)
+	  return;
+      }
+  else
+    sexp_get_raw_char(input);
+}
+
+static uint8_t
+sexp_next_char(struct sexp_input *input)
+{
+  sexp_get_char(input);
+  if (input->ctype != SEXP_NORMAL_CHAR)
+    die("Unexpected end of file.\n");
+
+  return input->c;
+}
+
+static void
+sexp_push_char(struct sexp_input *input,
+	       struct nettle_buffer *string)
+{
+  assert(input->ctype == SEXP_NORMAL_CHAR);
+    
+  if (!NETTLE_BUFFER_PUTC(string, input->c))
+    die("Virtual memory exhasuted.\n");
+}
+
+static void
+sexp_input_start_coding(struct sexp_input *input,
+			const struct nettle_armor *coding,
+			uint8_t terminator)
+{
+  assert(!input->coding);
+  
+  input->coding = coding;
+  input->coding->decode_init(&input->state);
+  input->terminator = terminator;
+}
+
+static void
+sexp_input_end_coding(struct sexp_input *input)
+{
+  assert(input->coding);
+
+  if (!input->coding->decode_final(&input->state))
+    die("Invalid coded data.\n");
+  
+  input->coding = NULL;
+}
+
+
+/* Return 0 at end-of-string */
+static int
+sexp_get_quoted_char(struct sexp_input *input)
+{
+  sexp_next_char(input);
+
+  for (;;)
+    switch (input->c)
+      {
+      default:
+	return 1;
+      case '\"':
+	return 0;
+      case '\\':
+	sexp_next_char(input);
+	
+	switch (input->c)
+	  {
+	  case 'b': input->c = '\b'; return 1;
+	  case 't': input->c = '\t'; return 1;
+	  case 'n': input->c = '\n'; return 1;
+	  case 'f': input->c = '\f'; return 1;
+	  case 'r': input->c = '\r'; return 1;
+	  case '\\': input->c = '\\'; return 1;
+	  case 'o':
+	  case 'x':
+	    /* FIXME: Not implemnted */
+	    abort();
+	  case '\n':
+	    if (sexp_next_char(input) == '\r')
+	      sexp_next_char(input);
+
+	    break;
+	  case '\r':
+	    if (sexp_next_char(input) == '\n')
+	      sexp_next_char(input);
+
+	    break;
+	  }
+	return 1;
+      }
+}
+
+static void
+sexp_get_token_string(struct sexp_input *input,
+	       struct nettle_buffer *string)
+{
+  assert(!input->coding);
+  assert(input->ctype == SEXP_NORMAL_CHAR);
+  
+  if (!TOKEN_CHAR(input->c))
+    die("Invalid token.\n");
+
+  do
+    {
+      sexp_push_char(input, string);
+      sexp_get_char(input);
+    }
+  while (input->ctype == SEXP_NORMAL_CHAR && TOKEN_CHAR(input->c));
+  
+  assert (string->size);
+}
+
+static void
+sexp_get_string(struct sexp_input *input,
+		struct nettle_buffer *string)
+{
+  nettle_buffer_reset(string);
+  input->token = SEXP_STRING;
+  
+  switch (input->c)
+    {
+    case '\"':
+      while (sexp_get_quoted_char(input))
+	sexp_push_char(input, string);
+      
+      sexp_get_char(input);
+      break;
+      
+    case '#':
+      sexp_input_start_coding(input, &nettle_base16, '#');
+      goto decode;
+
+    case '|':
+      sexp_input_start_coding(input, &nettle_base64, '|');
+
+    decode:
+      for (;;)
+	{
+	  sexp_get_char(input);
+	  switch (input->ctype)
+	    {
+	    case SEXP_NORMAL_CHAR:
+	      sexp_push_char(input, string);
+	      break;
+	    case SEXP_EOF_CHAR:
+	      die("Unexpected end of file in coded string.\n");
+	    case SEXP_END_CHAR:
+	      sexp_input_end_coding(input);
+	      sexp_get_char(input);
+	      return;
+	    }
+	}
+
+      break;
+
+    default:
+      sexp_get_token_string(input, string);
+      break;
+    }
+}
+
+static void
+sexp_get_string_length(struct sexp_input *input, enum sexp_mode mode,
+		       struct nettle_buffer *string)
+{
+  unsigned length;
+
+  nettle_buffer_reset(string);
+  input->token = SEXP_STRING;
+  
+  length = input->c - '0';
+  
+  if (!length)
+    /* There must be no more digits */
+    sexp_next_char(input);
+
+  else
+    {
+      assert(length < 10);
+      /* Get rest of digits */
+      for (;;)
+	{
+	  sexp_next_char(input);
+	  
+	  if (input->c < '0' || input->c > '9')
+	    break;
+	  
+	  /* FIXME: Check for overflow? */
+	  length = length * 10 + input->c - '0';
+	}
+    }
+
+  switch(input->c)
+    {
+    case ':':
+      /* Verbatim */
+      for (; length; length--)
+	{
+	  sexp_next_char(input);
+	  sexp_push_char(input, string);
+	}
+      
+      break;
+
+    case '"':
+      if (mode != SEXP_ADVANCED)
+	die("Encountered quoted string in canonical mode.\n");
+
+      for (; length; length--)
+	if (sexp_get_quoted_char(input))
+	  sexp_push_char(input, string);
+	else
+	  die("Unexpected end of string.\n");
+      
+      if (sexp_get_quoted_char(input))
+	die("Quoted string longer than expected.\n");
+
+      break;
+      
+    case '#':
+      sexp_input_start_coding(input, &nettle_base16, '#');
+      goto decode;
+
+    case '|':
+      sexp_input_start_coding(input, &nettle_base64, '|');
+
+    decode:
+      for (; length; length--)
+	{
+	  sexp_next_char(input);
+	  sexp_push_char(input, string);
+	}
+      sexp_get_char(input);
+      if (input->ctype != SEXP_END_CHAR)
+	die("Coded string too long.\n");
+
+      sexp_input_end_coding(input);
+      
+      break;
+      
+    default:
+      die("Invalid string.\n");
+    }
+
+  /* Skip the ending character. */
+  sexp_get_char(input);  
+}
+
+/* When called, input->c should be the first character of the current
+ * token.
+ *
+ * When returning, input->c should be the first character of the next
+ * token. */
+void
+sexp_get_token(struct sexp_input *input, enum sexp_mode mode,
+	       struct nettle_buffer *string)
+{
+  for(;;)
+    switch(input->ctype)
+      {
+      case SEXP_EOF_CHAR:
+	input->token = SEXP_EOF;
+	return;
+
+      case SEXP_END_CHAR:
+	input->token = SEXP_CODING_END;
+	sexp_input_end_coding(input);
+	sexp_get_char(input);
+	return;
+
+      case SEXP_NORMAL_CHAR:
+	switch(input->c)
+	  {
+	  case '0': case '1': case '2': case '3': case '4':
+	  case '5': case '6': case '7': case '8': case '9':
+	    sexp_get_string_length(input, mode, string);
+	    return;
+	  
+	  case '(':
+	    input->token = SEXP_LIST_START;
+	    sexp_get_char(input);
+	    return;
+	  
+	  case ')':
+	    input->token = SEXP_LIST_END;
+	    sexp_get_char(input);
+	    return;
+
+	  case '[':
+	    input->token = SEXP_DISPLAY_START;
+	    sexp_get_char(input);
+	    return;
+
+	  case ']':
+	    input->token = SEXP_DISPLAY_END;
+	    sexp_get_char(input);
+	    return;
+
+	  case '{':
+	    if (mode == SEXP_CANONICAL)
+	      die("Unexpected transport data in canonical mode.\n");
+	    
+	    sexp_input_start_coding(input, &nettle_base64, '}');
+	    sexp_get_char(input);
+
+	    input->token = SEXP_TRANSPORT_START;
+	    
+	    return;
+	  
+	  case ' ':  /* SPC, TAB, LF, CR */
+	  case '\t':
+	  case '\n':
+	  case '\r':
+	    if (mode == SEXP_CANONICAL)
+	      die("Whitespace encountered in canonical mode.\n");
+
+	    sexp_get_char(input);
+	    break;
+
+	  case ';': /* Comments */
+	    if (mode == SEXP_CANONICAL)
+	      die("Comment encountered in canonical mode.\n");
+
+	    do
+	      {
+		sexp_get_raw_char(input);
+		if (input->ctype != SEXP_NORMAL_CHAR)
+		  return;
+	      }
+	    while (input->c != '\n');
+	  
+	    break;
+	  
+	  default:
+	    /* Ought to be a string */
+	    if (mode != SEXP_ADVANCED)
+	      die("Encountered advanced string in canonical mode.\n");
+
+	    sexp_get_string(input, string);
+	    return;
+	  }
+      }
+}

src/nettle/tools/input.h

+/* input.h */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002, 2003 Niels Mller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library 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 Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef NETTLE_TOOLS_INPUT_H_INCLUDED
+#define NETTLE_TOOLS_INPUT_H_INCLUDED
+
+#include "misc.h"
+
+#include "base16.h"
+#include "base64.h"
+#include "buffer.h"
+#include "nettle-meta.h"
+
+#include <stdio.h>
+
+/* Special marks in the input stream */
+enum sexp_char_type
+  {
+    SEXP_NORMAL_CHAR = 0,
+    SEXP_EOF_CHAR, SEXP_END_CHAR,
+  };
+
+struct sexp_input
+{
+  FILE *f;
+
+  /* Character stream, consisting of ordinary characters,
+   * SEXP_EOF_CHAR, and SEXP_END_CHAR. */
+  enum sexp_char_type ctype;
+  uint8_t c;
+  
+  const struct nettle_armor *coding;
+
+  union {
+    struct base64_decode_ctx base64;
+    struct base16_decode_ctx hex;
+  } state;
+
+  /* Terminator for current coding */
+  uint8_t terminator;
+  
+  /* Type of current token */
+  enum sexp_token token;
+};
+
+void
+sexp_input_init(struct sexp_input *input, FILE *f);
+
+void
+sexp_get_char(struct sexp_input *input);
+
+void
+sexp_get_token(struct sexp_input *input, enum sexp_mode mode,
+	       struct nettle_buffer *string);
+
+
+#endif /* NETTLE_TOOLS_INPUT_H_INCLUDED */

src/nettle/tools/misc.c

+/* misc.c */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002, 2003 Niels Möller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library 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 Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#include "misc.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+void
+die(const char *format, ...)
+{
+  va_list args;
+  va_start(args, format);
+  vfprintf(stderr, format, args);
+  va_end(args);
+
+  exit(EXIT_FAILURE);
+}
+
+void
+werror(const char *format, ...)
+{
+  va_list args;
+  va_start(args, format);
+  vfprintf(stderr, format, args);
+  va_end(args);
+
+  exit(EXIT_FAILURE);
+}
+
+const char
+sexp_token_chars[0x80] =
+  {
+    /* 0, ... 0x1f */
+    0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+/* SPC ! " # $ % & ' ( ) * + , - . / */
+    0,0,0,0,0,0,0,0, 0,0,1,1,0,1,1,1,
+ /* 0 1 2 3 4 5 6 7  8 9 : ; < = > ? */
+    1,1,1,1,1,1,1,1, 1,1,1,0,0,1,0,0,
+    /* @ A ... O */
+    0,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,	
+    /* P ...             Z [ \ ] ^ _ */
+    1,1,1,1,1,1,1,1, 1,1,1,0,0,0,0,1,
+    /* ` a, ... o */
+    0,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,	
+    /* p ...             z { | } ~ DEL */
+    1,1,1,1,1,1,1,1, 1,1,1,0,0,0,0,0,
+  };

src/nettle/tools/misc.h

+/* misc.h */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002, 2003 Niels Mller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library 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 Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef NETTLE_TOOLS_MISC_H_INCLUDED
+#define NETTLE_TOOLS_MISC_H_INCLUDED
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+void
+die(const char *format, ...)
+#if __GNUC___
+     __attribute__((__format__ (__printf__,1, 2)))
+     __attribute__((__noreturn__))
+#endif
+     ;
+
+void
+werror(const char *format, ...)
+#if __GNUC___
+     __attribute__((__format__ (__printf__,1, 2)))
+     __attribute__((__noreturn__))
+#endif
+     ;
+
+enum sexp_mode