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Diffstat (limited to 'source/lib/iconv.c')
| -rw-r--r-- | source/lib/iconv.c | 576 |
1 files changed, 576 insertions, 0 deletions
diff --git a/source/lib/iconv.c b/source/lib/iconv.c new file mode 100644 index 00000000000..8bcd92d72a3 --- /dev/null +++ b/source/lib/iconv.c @@ -0,0 +1,576 @@ +/* + Unix SMB/Netbios implementation. + Version 3.0 + minimal iconv implementation + Copyright (C) Andrew Tridgell 2001 + + 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" + +static size_t ascii_pull(void *,char **, size_t *, char **, size_t *); +static size_t ascii_push(void *,char **, size_t *, char **, size_t *); +static size_t utf8_pull(void *,char **, size_t *, char **, size_t *); +static size_t utf8_push(void *,char **, size_t *, char **, size_t *); +static size_t weird_pull(void *,char **, size_t *, char **, size_t *); +static size_t weird_push(void *,char **, size_t *, char **, size_t *); +static size_t ucs2hex_pull(void *,char **, size_t *, char **, size_t *); +static size_t ucs2hex_push(void *,char **, size_t *, char **, size_t *); +static size_t iconv_copy(void *,char **, size_t *, char **, size_t *); + +/* + for each charset we have a function that pulls from that charset to + a ucs2 buffer, and a function that pushes to a ucs2 buffer +*/ +static struct { + char *name; + size_t (*pull)(void *, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft); + size_t (*push)(void *, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft); +} charsets[] = { + {"UCS-2LE", iconv_copy, iconv_copy}, + {"UTF8", utf8_pull, utf8_push}, + {"ASCII", ascii_pull, ascii_push}, + {"WEIRD", weird_pull, weird_push}, + {"UCS2-HEX", ucs2hex_pull, ucs2hex_push}, + {NULL, NULL, NULL} +}; + + +/* 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, + char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ +#ifdef HAVE_NATIVE_ICONV + size_t ret = iconv((iconv_t)cd, + inbuf, inbytesleft, + outbuf, outbytesleft); + if (ret == (size_t)-1) iconv(cd, NULL, NULL, NULL, NULL); + return ret; +#else + errno = EINVAL; + return -1; +#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, + (char **)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, + (char **)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; + int from, to; + + ret = (smb_iconv_t)malloc(sizeof(*ret)); + if (!ret) { + errno = ENOMEM; + return (smb_iconv_t)-1; + } + memset(ret, 0, sizeof(*ret)); + + /* check for the simplest null conversion */ + if (strcmp(fromcode, tocode) == 0) { + ret->direct = iconv_copy; + return ret; + } + + for (from=0; charsets[from].name; from++) { + if (strcasecmp(charsets[from].name, fromcode) == 0) break; + } + for (to=0; charsets[to].name; to++) { + if (strcasecmp(charsets[to].name, tocode) == 0) break; + } + +#ifdef HAVE_NATIVE_ICONV + if (!charsets[from].name) { + ret->pull = sys_iconv; + ret->cd_pull = iconv_open("UCS-2LE", fromcode); + if (ret->cd_pull == (iconv_t)-1) goto failed; + } + if (!charsets[to].name) { + ret->push = sys_iconv; + ret->cd_push = iconv_open(tocode, "UCS-2LE"); + if (ret->cd_push == (iconv_t)-1) goto failed; + } +#else + if (!charsets[from].name || !charsets[to].name) { + goto failed; + } +#endif + + /* check for conversion to/from ucs2 */ + if (from == 0 && charsets[to].name) { + ret->direct = charsets[to].push; + return ret; + } + if (to == 0 && charsets[from].name) { + ret->direct = charsets[from].pull; + return ret; + } + +#ifdef HAVE_NATIVE_ICONV + if (from == 0) { + ret->direct = sys_iconv; + ret->cd_direct = ret->cd_push; + ret->cd_push = NULL; + return ret; + } + if (to == 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 = charsets[from].pull; + if (!ret->push) ret->push = charsets[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 + + 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, 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, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + int ir_count=0; + + while (*inbytesleft >= 2 && *outbytesleft >= 1) { + (*outbuf)[0] = (*inbuf)[0]; + 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, 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, 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; +} + + +/* the "weird" character set is very useful for testing multi-byte + support and finding bugs. Don't use on a production system! +*/ +static struct { + char from; + char *to; + int len; +} weird_table[] = { + {'q', "^q^", 3}, + {'Q', "^Q^", 3}, + {0, NULL} +}; + +static size_t weird_pull(void *cd, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + while (*inbytesleft >= 1 && *outbytesleft >= 2) { + int i; + int done = 0; + for (i=0;weird_table[i].from;i++) { + if (strncmp((*inbuf), + weird_table[i].to, + weird_table[i].len) == 0) { + if (*inbytesleft < weird_table[i].len) { + DEBUG(0,("ERROR: truncated weird string\n")); + /* smb_panic("weird_pull"); */ + + } else { + (*outbuf)[0] = weird_table[i].from; + (*outbuf)[1] = 0; + (*inbytesleft) -= weird_table[i].len; + (*outbytesleft) -= 2; + (*inbuf) += weird_table[i].len; + (*outbuf) += 2; + done = 1; + break; + } + } + } + if (done) continue; + (*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 weird_push(void *cd, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + int ir_count=0; + + while (*inbytesleft >= 2 && *outbytesleft >= 1) { + int i; + int done=0; + for (i=0;weird_table[i].from;i++) { + if ((*inbuf)[0] == weird_table[i].from && + (*inbuf)[1] == 0) { + if (*outbytesleft < weird_table[i].len) { + DEBUG(0,("No room for weird character\n")); + /* smb_panic("weird_push"); */ + } else { + memcpy(*outbuf, weird_table[i].to, + weird_table[i].len); + (*inbytesleft) -= 2; + (*outbytesleft) -= weird_table[i].len; + (*inbuf) += 2; + (*outbuf) += weird_table[i].len; + done = 1; + break; + } + } + } + if (done) continue; + + (*outbuf)[0] = (*inbuf)[0]; + 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 iconv_copy(void *cd, 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, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + while (*inbytesleft >= 1 && *outbytesleft >= 2) { + unsigned char *c = (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, char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + while (*inbytesleft >= 2 && *outbytesleft >= 1) { + unsigned char *c = (unsigned char *)*outbuf; + unsigned char *uc = (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; +} + |