first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 526 insertions, 0 deletions

diff --git a/source4/lib/iconv.c b/source4/lib/iconv.c
new file mode 100644
index 0000000000..8f85e29c2e
--- /dev/null
+++ b/source4/lib/iconv.c
@@ -0,0 +1,526 @@
+/* 
+   Unix SMB/CIFS implementation.
+   minimal iconv implementation
+   Copyright (C) Andrew Tridgell 2001
+   Copyright (C) Jelmer Vernooij 2002
+   
+   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; either version 2 of the License, or
+   (at your option) any later version.
+   
+   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.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+
+/**
+ * @file
+ *
+ * @brief Samba wrapper/stub for iconv character set conversion.
+ *
+ * iconv is the XPG2 interface for converting between character
+ * encodings.  This file provides a Samba wrapper around it, and also
+ * a simple reimplementation that is used if the system does not
+ * implement iconv.
+ *
+ * Samba only works with encodings that are supersets of ASCII: ascii
+ * characters like whitespace can be tested for directly, multibyte
+ * sequences start with a byte with the high bit set, and strings are
+ * terminated by a nul byte.
+ *
+ * Note that the only function provided by iconv is conversion between
+ * characters.  It doesn't directly support operations like
+ * uppercasing or comparison.  We have to convert to UCS-2 and compare
+ * there.
+ *
+ * @sa Samba Developers Guide
+ **/
+
+static size_t ascii_pull(void *,const char **, size_t *, char **, size_t *);
+static size_t ascii_push(void *,const char **, size_t *, char **, size_t *);
+static size_t  utf8_pull(void *,const char **, size_t *, char **, size_t *);
+static size_t  utf8_push(void *,const char **, size_t *, char **, size_t *);
+static size_t ucs2hex_pull(void *,const char **, size_t *, char **, size_t *);
+static size_t ucs2hex_push(void *,const char **, size_t *, char **, size_t *);
+static size_t iconv_copy(void *,const char **, size_t *, char **, size_t *);
+
+static struct charset_functions builtin_functions[] = {
+	{"UCS-2LE",  iconv_copy, iconv_copy},
+	{"UTF8",   utf8_pull,  utf8_push},
+	{"ASCII", ascii_pull, ascii_push},
+	{"UCS2-HEX", ucs2hex_pull, ucs2hex_push},
+	{NULL, NULL, NULL}
+};
+
+static struct charset_functions *charsets = NULL;
+
+BOOL smb_register_charset(struct charset_functions *funcs) 
+{
+	struct charset_functions *c = charsets;
+
+	DEBUG(5, ("Attempting to register new charset %s\n", funcs->name));
+	/* Check whether we already have this charset... */
+	while(c) {
+		if(!strcasecmp(c->name, funcs->name)){ 
+			DEBUG(2, ("Duplicate charset %s, not registering\n", funcs->name));
+			return False;
+		}
+		c = c->next;
+	}
+
+	funcs->next = funcs->prev = NULL;
+	DEBUG(5, ("Registered charset %s\n", funcs->name));
+	DLIST_ADD(charsets, funcs);
+	return True;
+}
+
+static void lazy_initialize_iconv(void)
+{
+	static BOOL initialized = False;
+	int i;
+
+	if (!initialized) {
+		initialized = True;
+		for(i = 0; builtin_functions[i].name; i++) 
+			smb_register_charset(&builtin_functions[i]);
+	}
+}
+
+#ifdef HAVE_NATIVE_ICONV
+/* if there was an error then reset the internal state,
+   this ensures that we don't have a shift state remaining for
+   character sets like SJIS */
+static size_t sys_iconv(void *cd, 
+			const char **inbuf, size_t *inbytesleft,
+			char **outbuf, size_t *outbytesleft)
+{
+	size_t ret = iconv((iconv_t)cd, 
+			   inbuf, inbytesleft, 
+			   outbuf, outbytesleft);
+	if (ret == (size_t)-1) iconv(cd, NULL, NULL, NULL, NULL);
+	return ret;
+}
+#endif
+
+/**
+ * This is a simple portable iconv() implementaion.
+ *
+ * It only knows about a very small number of character sets - just
+ * enough that Samba works on systems that don't have iconv.
+ **/
+size_t smb_iconv(smb_iconv_t cd, 
+		 const char **inbuf, size_t *inbytesleft,
+		 char **outbuf, size_t *outbytesleft)
+{
+	char cvtbuf[2048];
+	char *bufp = cvtbuf;
+	size_t bufsize;
+
+	/* in many cases we can go direct */
+	if (cd->direct) {
+		return cd->direct(cd->cd_direct, 
+				  inbuf, inbytesleft, outbuf, outbytesleft);
+	}
+
+
+	/* otherwise we have to do it chunks at a time */
+	while (*inbytesleft > 0) {
+		bufp = cvtbuf;
+		bufsize = sizeof(cvtbuf);
+		
+		if (cd->pull(cd->cd_pull, 
+			     inbuf, inbytesleft, &bufp, &bufsize) == -1
+		    && errno != E2BIG) return -1;
+
+		bufp = cvtbuf;
+		bufsize = sizeof(cvtbuf) - bufsize;
+
+		if (cd->push(cd->cd_push, 
+			     &bufp, &bufsize, 
+			     outbuf, outbytesleft) == -1) return -1;
+	}
+
+	return 0;
+}
+
+/*
+  simple iconv_open() wrapper
+ */
+smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
+{
+	smb_iconv_t ret;
+	struct charset_functions *from, *to;
+	
+	lazy_initialize_iconv();
+	from = charsets;
+	to = charsets;
+
+	ret = (smb_iconv_t)malloc(sizeof(*ret));
+	if (!ret) {
+		errno = ENOMEM;
+		return (smb_iconv_t)-1;
+	}
+	memset(ret, 0, sizeof(*ret));
+
+	ret->from_name = strdup(fromcode);
+	ret->to_name = strdup(tocode);
+
+	/* check for the simplest null conversion */
+	if (strcmp(fromcode, tocode) == 0) {
+		ret->direct = iconv_copy;
+		return ret;
+	}
+
+	while (from) {
+		if (strcasecmp(from->name, fromcode) == 0) break;
+		from = from->next;
+	}
+
+	while (to) {
+		if (strcasecmp(to->name, tocode) == 0) break;
+		to = to->next;
+	}
+
+#ifdef HAVE_NATIVE_ICONV
+	if (!from) {
+		ret->pull = sys_iconv;
+		ret->cd_pull = iconv_open("UCS-2LE", fromcode);
+		if (ret->cd_pull == (iconv_t)-1) goto failed;
+	}
+
+	if (!to) {
+		ret->push = sys_iconv;
+		ret->cd_push = iconv_open(tocode, "UCS-2LE");
+		if (ret->cd_push == (iconv_t)-1) goto failed;
+	}
+#else
+	if (!from || !to) {
+		goto failed;
+	}
+#endif
+
+	/* check for conversion to/from ucs2 */
+	if (strcasecmp(fromcode, "UCS-2LE") == 0 && to) {
+		ret->direct = to->push;
+		return ret;
+	}
+	if (strcasecmp(tocode, "UCS-2LE") == 0 && from) {
+		ret->direct = from->pull;
+		return ret;
+	}
+
+#ifdef HAVE_NATIVE_ICONV
+	if (strcasecmp(fromcode, "UCS-2LE") == 0) {
+		ret->direct = sys_iconv;
+		ret->cd_direct = ret->cd_push;
+		ret->cd_push = NULL;
+		return ret;
+	}
+	if (strcasecmp(tocode, "UCS-2LE") == 0) {
+		ret->direct = sys_iconv;
+		ret->cd_direct = ret->cd_pull;
+		ret->cd_pull = NULL;
+		return ret;
+	}
+#endif
+
+	/* the general case has to go via a buffer */
+	if (!ret->pull) ret->pull = from->pull;
+	if (!ret->push) ret->push = to->push;
+	return ret;
+
+failed:
+	SAFE_FREE(ret);
+	errno = EINVAL;
+	return (smb_iconv_t)-1;
+}
+
+/*
+  simple iconv_close() wrapper
+*/
+int smb_iconv_close (smb_iconv_t cd)
+{
+#ifdef HAVE_NATIVE_ICONV
+	if (cd->cd_direct) iconv_close((iconv_t)cd->cd_direct);
+	if (cd->cd_pull) iconv_close((iconv_t)cd->cd_pull);
+	if (cd->cd_push) iconv_close((iconv_t)cd->cd_push);
+#endif
+
+	SAFE_FREE(cd->from_name);
+	SAFE_FREE(cd->to_name);
+
+	memset(cd, 0, sizeof(*cd));
+	SAFE_FREE(cd);
+	return 0;
+}
+
+
+/**********************************************************************
+ the following functions implement the builtin character sets in Samba
+ and also the "test" character sets that are designed to test
+ multi-byte character set support for english users
+***********************************************************************/
+static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft,
+			 char **outbuf, size_t *outbytesleft)
+{
+	while (*inbytesleft >= 1 && *outbytesleft >= 2) {
+		(*outbuf)[0] = (*inbuf)[0];
+		(*outbuf)[1] = 0;
+		(*inbytesleft)  -= 1;
+		(*outbytesleft) -= 2;
+		(*inbuf)  += 1;
+		(*outbuf) += 2;
+	}
+
+	if (*inbytesleft > 0) {
+		errno = E2BIG;
+		return -1;
+	}
+	
+	return 0;
+}
+
+static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft,
+			 char **outbuf, size_t *outbytesleft)
+{
+	int ir_count=0;
+
+	while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+		(*outbuf)[0] = (*inbuf)[0] & 0x7F;
+		if ((*inbuf)[1]) ir_count++;
+		(*inbytesleft)  -= 2;
+		(*outbytesleft) -= 1;
+		(*inbuf)  += 2;
+		(*outbuf) += 1;
+	}
+
+	if (*inbytesleft == 1) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (*inbytesleft > 1) {
+		errno = E2BIG;
+		return -1;
+	}
+	
+	return ir_count;
+}
+
+
+static size_t ucs2hex_pull(void *cd, const char **inbuf, size_t *inbytesleft,
+			 char **outbuf, size_t *outbytesleft)
+{
+	while (*inbytesleft >= 1 && *outbytesleft >= 2) {
+		unsigned v;
+
+		if ((*inbuf)[0] != '@') {
+			/* seven bit ascii case */
+			(*outbuf)[0] = (*inbuf)[0];
+			(*outbuf)[1] = 0;
+			(*inbytesleft)  -= 1;
+			(*outbytesleft) -= 2;
+			(*inbuf)  += 1;
+			(*outbuf) += 2;
+			continue;
+		}
+		/* it's a hex character */
+		if (*inbytesleft < 5) {
+			errno = EINVAL;
+			return -1;
+		}
+		
+		if (sscanf(&(*inbuf)[1], "%04x", &v) != 1) {
+			errno = EILSEQ;
+			return -1;
+		}
+
+		(*outbuf)[0] = v&0xff;
+		(*outbuf)[1] = v>>8;
+		(*inbytesleft)  -= 5;
+		(*outbytesleft) -= 2;
+		(*inbuf)  += 5;
+		(*outbuf) += 2;
+	}
+
+	if (*inbytesleft > 0) {
+		errno = E2BIG;
+		return -1;
+	}
+	
+	return 0;
+}
+
+static size_t ucs2hex_push(void *cd, const char **inbuf, size_t *inbytesleft,
+			   char **outbuf, size_t *outbytesleft)
+{
+	while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+		char buf[6];
+
+		if ((*inbuf)[1] == 0 && 
+		    ((*inbuf)[0] & 0x80) == 0 &&
+		    (*inbuf)[0] != '@') {
+			(*outbuf)[0] = (*inbuf)[0];
+			(*inbytesleft)  -= 2;
+			(*outbytesleft) -= 1;
+			(*inbuf)  += 2;
+			(*outbuf) += 1;
+			continue;
+		}
+		if (*outbytesleft < 5) {
+			errno = E2BIG;
+			return -1;
+		}
+		snprintf(buf, 6, "@%04x", SVAL(*inbuf, 0));
+		memcpy(*outbuf, buf, 5);
+		(*inbytesleft)  -= 2;
+		(*outbytesleft) -= 5;
+		(*inbuf)  += 2;
+		(*outbuf) += 5;
+	}
+
+	if (*inbytesleft == 1) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (*inbytesleft > 1) {
+		errno = E2BIG;
+		return -1;
+	}
+	
+	return 0;
+}
+
+
+static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft,
+			 char **outbuf, size_t *outbytesleft)
+{
+	int n;
+
+	n = MIN(*inbytesleft, *outbytesleft);
+
+	memmove(*outbuf, *inbuf, n);
+
+	(*inbytesleft) -= n;
+	(*outbytesleft) -= n;
+	(*inbuf) += n;
+	(*outbuf) += n;
+
+	if (*inbytesleft > 0) {
+		errno = E2BIG;
+		return -1;
+	}
+
+	return 0;
+}
+
+static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft,
+			 char **outbuf, size_t *outbytesleft)
+{
+	while (*inbytesleft >= 1 && *outbytesleft >= 2) {
+		const unsigned char *c = (const unsigned char *)*inbuf;
+		unsigned char *uc = (unsigned char *)*outbuf;
+		int len = 1;
+
+		if ((c[0] & 0x80) == 0) {
+			uc[0] = c[0];
+			uc[1] = 0;
+		} else if ((c[0] & 0xf0) == 0xe0) {
+			if (*inbytesleft < 3) {
+				DEBUG(0,("short utf8 char\n"));
+				goto badseq;
+			}
+			uc[1] = ((c[0]&0xF)<<4) | ((c[1]>>2)&0xF);
+			uc[0] = (c[1]<<6) | (c[2]&0x3f);
+			len = 3;
+		} else if ((c[0] & 0xe0) == 0xc0) {
+			if (*inbytesleft < 2) {
+				DEBUG(0,("short utf8 char\n"));
+				goto badseq;
+			}
+			uc[1] = (c[0]>>2) & 0x7;
+			uc[0] = (c[0]<<6) | (c[1]&0x3f);
+			len = 2;
+		}
+
+		(*inbuf)  += len;
+		(*inbytesleft)  -= len;
+		(*outbytesleft) -= 2;
+		(*outbuf) += 2;
+	}
+
+	if (*inbytesleft > 0) {
+		errno = E2BIG;
+		return -1;
+	}
+	
+	return 0;
+
+badseq:
+	errno = EINVAL;
+	return -1;
+}
+
+static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft,
+			 char **outbuf, size_t *outbytesleft)
+{
+	while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+		unsigned char *c = (unsigned char *)*outbuf;
+		const unsigned char *uc = (const unsigned char *)*inbuf;
+		int len=1;
+
+		if (uc[1] & 0xf8) {
+			if (*outbytesleft < 3) {
+				DEBUG(0,("short utf8 write\n"));
+				goto toobig;
+			}
+			c[0] = 0xe0 | (uc[1]>>4);
+			c[1] = 0x80 | ((uc[1]&0xF)<<2) | (uc[0]>>6);
+			c[2] = 0x80 | (uc[0]&0x3f);
+			len = 3;
+		} else if (uc[1] | (uc[0] & 0x80)) {
+			if (*outbytesleft < 2) {
+				DEBUG(0,("short utf8 write\n"));
+				goto toobig;
+			}
+			c[0] = 0xc0 | (uc[1]<<2) | (uc[0]>>6);
+			c[1] = 0x80 | (uc[0]&0x3f);
+			len = 2;
+		} else {
+			c[0] = uc[0];
+		}
+
+
+		(*inbytesleft)  -= 2;
+		(*outbytesleft) -= len;
+		(*inbuf)  += 2;
+		(*outbuf) += len;
+	}
+
+	if (*inbytesleft == 1) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (*inbytesleft > 1) {
+		errno = E2BIG;
+		return -1;
+	}
+	
+	return 0;
+
+toobig:
+	errno = E2BIG;
+	return -1;
+}
+