diff options
Diffstat (limited to 'fs/udf/unicode.c')
-rw-r--r-- | fs/udf/unicode.c | 630 |
1 files changed, 250 insertions, 380 deletions
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c index e788a05aab83..3ff42f4437f3 100644 --- a/fs/udf/unicode.c +++ b/fs/udf/unicode.c @@ -28,199 +28,72 @@ #include "udf_sb.h" -static int udf_translate_to_linux(uint8_t *, int, uint8_t *, int, uint8_t *, - int); - -static int udf_char_to_ustr(struct ustr *dest, const uint8_t *src, int strlen) -{ - if ((!dest) || (!src) || (!strlen) || (strlen > UDF_NAME_LEN - 2)) - return 0; - - memset(dest, 0, sizeof(struct ustr)); - memcpy(dest->u_name, src, strlen); - dest->u_cmpID = 0x08; - dest->u_len = strlen; - - return strlen; -} - -/* - * udf_build_ustr - */ -int udf_build_ustr(struct ustr *dest, dstring *ptr, int size) -{ - int usesize; - - if (!dest || !ptr || !size) - return -1; - BUG_ON(size < 2); - - usesize = min_t(size_t, ptr[size - 1], sizeof(dest->u_name)); - usesize = min(usesize, size - 2); - dest->u_cmpID = ptr[0]; - dest->u_len = usesize; - memcpy(dest->u_name, ptr + 1, usesize); - memset(dest->u_name + usesize, 0, sizeof(dest->u_name) - usesize); - - return 0; -} - -/* - * udf_build_ustr_exact - */ -static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize) -{ - memset(dest, 0, sizeof(struct ustr)); - dest->u_cmpID = ptr[0]; - dest->u_len = exactsize - 1; - memcpy(dest->u_name, ptr + 1, exactsize - 1); -} - -/* - * udf_CS0toUTF8 - * - * PURPOSE - * Convert OSTA Compressed Unicode to the UTF-8 equivalent. - * - * PRE-CONDITIONS - * utf Pointer to UTF-8 output buffer. - * ocu Pointer to OSTA Compressed Unicode input buffer - * of size UDF_NAME_LEN bytes. - * both of type "struct ustr *" - * - * POST-CONDITIONS - * <return> >= 0 on success. - * - * HISTORY - * November 12, 1997 - Andrew E. Mileski - * Written, tested, and released. - */ -int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i) +static int udf_uni2char_utf8(wchar_t uni, + unsigned char *out, + int boundlen) { - const uint8_t *ocu; - uint8_t cmp_id, ocu_len; - int i; - - ocu_len = ocu_i->u_len; - if (ocu_len == 0) { - memset(utf_o, 0, sizeof(struct ustr)); - return 0; - } - - cmp_id = ocu_i->u_cmpID; - if (cmp_id != 8 && cmp_id != 16) { - memset(utf_o, 0, sizeof(struct ustr)); - pr_err("unknown compression code (%d) stri=%s\n", - cmp_id, ocu_i->u_name); - return -EINVAL; - } - - ocu = ocu_i->u_name; - utf_o->u_len = 0; - for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) { - - /* Expand OSTA compressed Unicode to Unicode */ - uint32_t c = ocu[i++]; - if (cmp_id == 16) - c = (c << 8) | ocu[i++]; - - /* Compress Unicode to UTF-8 */ - if (c < 0x80U) - utf_o->u_name[utf_o->u_len++] = (uint8_t)c; - else if (c < 0x800U) { - if (utf_o->u_len > (UDF_NAME_LEN - 4)) - break; - utf_o->u_name[utf_o->u_len++] = - (uint8_t)(0xc0 | (c >> 6)); - utf_o->u_name[utf_o->u_len++] = - (uint8_t)(0x80 | (c & 0x3f)); - } else { - if (utf_o->u_len > (UDF_NAME_LEN - 5)) - break; - utf_o->u_name[utf_o->u_len++] = - (uint8_t)(0xe0 | (c >> 12)); - utf_o->u_name[utf_o->u_len++] = - (uint8_t)(0x80 | - ((c >> 6) & 0x3f)); - utf_o->u_name[utf_o->u_len++] = - (uint8_t)(0x80 | (c & 0x3f)); - } + int u_len = 0; + + if (boundlen <= 0) + return -ENAMETOOLONG; + + if (uni < 0x80) { + out[u_len++] = (unsigned char)uni; + } else if (uni < 0x800) { + if (boundlen < 2) + return -ENAMETOOLONG; + out[u_len++] = (unsigned char)(0xc0 | (uni >> 6)); + out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f)); + } else { + if (boundlen < 3) + return -ENAMETOOLONG; + out[u_len++] = (unsigned char)(0xe0 | (uni >> 12)); + out[u_len++] = (unsigned char)(0x80 | ((uni >> 6) & 0x3f)); + out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f)); } - utf_o->u_cmpID = 8; - - return utf_o->u_len; + return u_len; } -/* - * - * udf_UTF8toCS0 - * - * PURPOSE - * Convert UTF-8 to the OSTA Compressed Unicode equivalent. - * - * DESCRIPTION - * This routine is only called by udf_lookup(). - * - * PRE-CONDITIONS - * ocu Pointer to OSTA Compressed Unicode output - * buffer of size UDF_NAME_LEN bytes. - * utf Pointer to UTF-8 input buffer. - * utf_len Length of UTF-8 input buffer in bytes. - * - * POST-CONDITIONS - * <return> Zero on success. - * - * HISTORY - * November 12, 1997 - Andrew E. Mileski - * Written, tested, and released. - */ -static int udf_UTF8toCS0(dstring *ocu, struct ustr *utf, int length) +static int udf_char2uni_utf8(const unsigned char *in, + int boundlen, + wchar_t *uni) { - unsigned c, i, max_val, utf_char; - int utf_cnt, u_len, u_ch; - - memset(ocu, 0, sizeof(dstring) * length); - ocu[0] = 8; - max_val = 0xffU; - u_ch = 1; + unsigned int utf_char; + unsigned char c; + int utf_cnt, u_len; -try_again: - u_len = 0U; - utf_char = 0U; - utf_cnt = 0U; - for (i = 0U; i < utf->u_len; i++) { - /* Name didn't fit? */ - if (u_len + 1 + u_ch >= length) - return 0; - - c = (uint8_t)utf->u_name[i]; + utf_char = 0; + utf_cnt = 0; + for (u_len = 0; u_len < boundlen;) { + c = in[u_len++]; /* Complete a multi-byte UTF-8 character */ if (utf_cnt) { - utf_char = (utf_char << 6) | (c & 0x3fU); + utf_char = (utf_char << 6) | (c & 0x3f); if (--utf_cnt) continue; } else { /* Check for a multi-byte UTF-8 character */ - if (c & 0x80U) { + if (c & 0x80) { /* Start a multi-byte UTF-8 character */ - if ((c & 0xe0U) == 0xc0U) { - utf_char = c & 0x1fU; + if ((c & 0xe0) == 0xc0) { + utf_char = c & 0x1f; utf_cnt = 1; - } else if ((c & 0xf0U) == 0xe0U) { - utf_char = c & 0x0fU; + } else if ((c & 0xf0) == 0xe0) { + utf_char = c & 0x0f; utf_cnt = 2; - } else if ((c & 0xf8U) == 0xf0U) { - utf_char = c & 0x07U; + } else if ((c & 0xf8) == 0xf0) { + utf_char = c & 0x07; utf_cnt = 3; - } else if ((c & 0xfcU) == 0xf8U) { - utf_char = c & 0x03U; + } else if ((c & 0xfc) == 0xf8) { + utf_char = c & 0x03; utf_cnt = 4; - } else if ((c & 0xfeU) == 0xfcU) { - utf_char = c & 0x01U; + } else if ((c & 0xfe) == 0xfc) { + utf_char = c & 0x01; utf_cnt = 5; } else { - goto error_out; + utf_cnt = -1; + break; } continue; } else { @@ -228,97 +101,216 @@ try_again: utf_char = c; } } - - /* Choose no compression if necessary */ - if (utf_char > max_val) { - if (max_val == 0xffU) { - max_val = 0xffffU; - ocu[0] = (uint8_t)0x10U; - u_ch = 2; - goto try_again; - } - goto error_out; - } - - if (max_val == 0xffffU) - ocu[++u_len] = (uint8_t)(utf_char >> 8); - ocu[++u_len] = (uint8_t)(utf_char & 0xffU); + *uni = utf_char; + break; } - if (utf_cnt) { -error_out: - ocu[++u_len] = '?'; - printk(KERN_DEBUG pr_fmt("bad UTF-8 character\n")); + *uni = '?'; + return -EINVAL; } + return u_len; +} - ocu[length - 1] = (uint8_t)u_len + 1; +#define ILLEGAL_CHAR_MARK '_' +#define EXT_MARK '.' +#define CRC_MARK '#' +#define EXT_SIZE 5 +/* Number of chars we need to store generated CRC to make filename unique */ +#define CRC_LEN 5 + +static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len, + int *str_o_idx, + const uint8_t *str_i, int str_i_max_len, + int *str_i_idx, + int u_ch, int *needsCRC, + int (*conv_f)(wchar_t, unsigned char *, int), + int translate) +{ + uint32_t c; + int illChar = 0; + int len, gotch = 0; + + for (; (!gotch) && (*str_i_idx < str_i_max_len); *str_i_idx += u_ch) { + if (*str_o_idx >= str_o_max_len) { + *needsCRC = 1; + return gotch; + } - return u_len + 1; + /* Expand OSTA compressed Unicode to Unicode */ + c = str_i[*str_i_idx]; + if (u_ch > 1) + c = (c << 8) | str_i[*str_i_idx + 1]; + + if (translate && (c == '/' || c == 0)) + illChar = 1; + else if (illChar) + break; + else + gotch = 1; + } + if (illChar) { + *needsCRC = 1; + c = ILLEGAL_CHAR_MARK; + gotch = 1; + } + if (gotch) { + len = conv_f(c, &str_o[*str_o_idx], str_o_max_len - *str_o_idx); + /* Valid character? */ + if (len >= 0) + *str_o_idx += len; + else if (len == -ENAMETOOLONG) { + *needsCRC = 1; + gotch = 0; + } else { + str_o[(*str_o_idx)++] = '?'; + *needsCRC = 1; + } + } + return gotch; } -static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o, - const struct ustr *ocu_i) +static int udf_name_from_CS0(uint8_t *str_o, int str_max_len, + const uint8_t *ocu, int ocu_len, + int (*conv_f)(wchar_t, unsigned char *, int), + int translate) { - const uint8_t *ocu; - uint8_t cmp_id, ocu_len; - int i, len; + uint32_t c; + uint8_t cmp_id; + int idx, len; + int u_ch; + int needsCRC = 0; + int ext_i_len, ext_max_len; + int str_o_len = 0; /* Length of resulting output */ + int ext_o_len = 0; /* Extension output length */ + int ext_crc_len = 0; /* Extension output length if used with CRC */ + int i_ext = -1; /* Extension position in input buffer */ + int o_crc = 0; /* Rightmost possible output pos for CRC+ext */ + unsigned short valueCRC; + uint8_t ext[EXT_SIZE * NLS_MAX_CHARSET_SIZE + 1]; + uint8_t crc[CRC_LEN]; + if (str_max_len <= 0) + return 0; - ocu_len = ocu_i->u_len; if (ocu_len == 0) { - memset(utf_o, 0, sizeof(struct ustr)); + memset(str_o, 0, str_max_len); return 0; } - cmp_id = ocu_i->u_cmpID; + cmp_id = ocu[0]; if (cmp_id != 8 && cmp_id != 16) { - memset(utf_o, 0, sizeof(struct ustr)); - pr_err("unknown compression code (%d) stri=%s\n", - cmp_id, ocu_i->u_name); + memset(str_o, 0, str_max_len); + pr_err("unknown compression code (%d)\n", cmp_id); return -EINVAL; } + u_ch = cmp_id >> 3; - ocu = ocu_i->u_name; - utf_o->u_len = 0; - for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) { - /* Expand OSTA compressed Unicode to Unicode */ - uint32_t c = ocu[i++]; - if (cmp_id == 16) - c = (c << 8) | ocu[i++]; + ocu++; + ocu_len--; - len = nls->uni2char(c, &utf_o->u_name[utf_o->u_len], - UDF_NAME_LEN - 2 - utf_o->u_len); - /* Valid character? */ - if (len >= 0) - utf_o->u_len += len; - else - utf_o->u_name[utf_o->u_len++] = '?'; + if (ocu_len % u_ch) { + pr_err("incorrect filename length (%d)\n", ocu_len + 1); + return -EINVAL; + } + + if (translate) { + /* Look for extension */ + for (idx = ocu_len - u_ch, ext_i_len = 0; + (idx >= 0) && (ext_i_len < EXT_SIZE); + idx -= u_ch, ext_i_len++) { + c = ocu[idx]; + if (u_ch > 1) + c = (c << 8) | ocu[idx + 1]; + + if (c == EXT_MARK) { + if (ext_i_len) + i_ext = idx; + break; + } + } + if (i_ext >= 0) { + /* Convert extension */ + ext_max_len = min_t(int, sizeof(ext), str_max_len); + ext[ext_o_len++] = EXT_MARK; + idx = i_ext + u_ch; + while (udf_name_conv_char(ext, ext_max_len, &ext_o_len, + ocu, ocu_len, &idx, + u_ch, &needsCRC, + conv_f, translate)) { + if ((ext_o_len + CRC_LEN) < str_max_len) + ext_crc_len = ext_o_len; + } + } } - utf_o->u_cmpID = 8; - return utf_o->u_len; + idx = 0; + while (1) { + if (translate && (idx == i_ext)) { + if (str_o_len > (str_max_len - ext_o_len)) + needsCRC = 1; + break; + } + + if (!udf_name_conv_char(str_o, str_max_len, &str_o_len, + ocu, ocu_len, &idx, + u_ch, &needsCRC, conv_f, translate)) + break; + + if (translate && + (str_o_len <= (str_max_len - ext_o_len - CRC_LEN))) + o_crc = str_o_len; + } + + if (translate) { + if (str_o_len <= 2 && str_o[0] == '.' && + (str_o_len == 1 || str_o[1] == '.')) + needsCRC = 1; + if (needsCRC) { + str_o_len = o_crc; + valueCRC = crc_itu_t(0, ocu, ocu_len); + crc[0] = CRC_MARK; + crc[1] = hex_asc_upper_hi(valueCRC >> 8); + crc[2] = hex_asc_upper_lo(valueCRC >> 8); + crc[3] = hex_asc_upper_hi(valueCRC); + crc[4] = hex_asc_upper_lo(valueCRC); + len = min_t(int, CRC_LEN, str_max_len - str_o_len); + memcpy(&str_o[str_o_len], crc, len); + str_o_len += len; + ext_o_len = ext_crc_len; + } + if (ext_o_len > 0) { + memcpy(&str_o[str_o_len], ext, ext_o_len); + str_o_len += ext_o_len; + } + } + + return str_o_len; } -static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni, - int length) +static int udf_name_to_CS0(uint8_t *ocu, int ocu_max_len, + const uint8_t *str_i, int str_len, + int (*conv_f)(const unsigned char *, int, wchar_t *)) { - int len; - unsigned i, max_val; - uint16_t uni_char; + int i, len; + unsigned int max_val; + wchar_t uni_char; int u_len, u_ch; - memset(ocu, 0, sizeof(dstring) * length); + if (ocu_max_len <= 0) + return 0; + + memset(ocu, 0, ocu_max_len); ocu[0] = 8; - max_val = 0xffU; + max_val = 0xff; u_ch = 1; try_again: - u_len = 0U; - for (i = 0U; i < uni->u_len; i++) { + u_len = 1; + for (i = 0; i < str_len; i++) { /* Name didn't fit? */ - if (u_len + 1 + u_ch >= length) + if (u_len + u_ch > ocu_max_len) return 0; - len = nls->char2uni(&uni->u_name[i], uni->u_len - i, &uni_char); + len = conv_f(&str_i[i], str_len - i, &uni_char); if (!len) continue; /* Invalid character, deal with it */ @@ -328,187 +320,65 @@ try_again: } if (uni_char > max_val) { - max_val = 0xffffU; - ocu[0] = (uint8_t)0x10U; + max_val = 0xffff; + ocu[0] = 0x10; u_ch = 2; goto try_again; } - if (max_val == 0xffffU) - ocu[++u_len] = (uint8_t)(uni_char >> 8); - ocu[++u_len] = (uint8_t)(uni_char & 0xffU); + if (max_val == 0xffff) + ocu[u_len++] = (uint8_t)(uni_char >> 8); + ocu[u_len++] = (uint8_t)(uni_char & 0xff); i += len - 1; } - ocu[length - 1] = (uint8_t)u_len + 1; - return u_len + 1; + return u_len; } -int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen, +int udf_CS0toUTF8(uint8_t *utf_o, int o_len, const uint8_t *ocu_i, int i_len) +{ + return udf_name_from_CS0(utf_o, o_len, ocu_i, i_len, + udf_uni2char_utf8, 0); +} + +int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen, uint8_t *dname, int dlen) { - struct ustr *filename, *unifilename; + int (*conv_f)(wchar_t, unsigned char *, int); int ret; if (!slen) return -EIO; - filename = kmalloc(sizeof(struct ustr), GFP_NOFS); - if (!filename) - return -ENOMEM; - - unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS); - if (!unifilename) { - ret = -ENOMEM; - goto out1; - } + if (dlen <= 0) + return 0; - udf_build_ustr_exact(unifilename, sname, slen); if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { - ret = udf_CS0toUTF8(filename, unifilename); - if (ret < 0) { - udf_debug("Failed in udf_get_filename: sname = %s\n", - sname); - goto out2; - } + conv_f = udf_uni2char_utf8; } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) { - ret = udf_CS0toNLS(UDF_SB(sb)->s_nls_map, filename, - unifilename); - if (ret < 0) { - udf_debug("Failed in udf_get_filename: sname = %s\n", - sname); - goto out2; - } + conv_f = UDF_SB(sb)->s_nls_map->uni2char; } else BUG(); - ret = udf_translate_to_linux(dname, dlen, - filename->u_name, filename->u_len, - unifilename->u_name, unifilename->u_len); + ret = udf_name_from_CS0(dname, dlen, sname, slen, conv_f, 1); /* Zero length filename isn't valid... */ if (ret == 0) ret = -EINVAL; -out2: - kfree(unifilename); -out1: - kfree(filename); return ret; } -int udf_put_filename(struct super_block *sb, const uint8_t *sname, - uint8_t *dname, int flen) +int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen, + uint8_t *dname, int dlen) { - struct ustr unifilename; - int namelen; - - if (!udf_char_to_ustr(&unifilename, sname, flen)) - return 0; + int (*conv_f)(const unsigned char *, int, wchar_t *); if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { - namelen = udf_UTF8toCS0(dname, &unifilename, UDF_NAME_LEN); - if (!namelen) - return 0; + conv_f = udf_char2uni_utf8; } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) { - namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname, - &unifilename, UDF_NAME_LEN); - if (!namelen) - return 0; + conv_f = UDF_SB(sb)->s_nls_map->char2uni; } else - return 0; + BUG(); - return namelen; + return udf_name_to_CS0(dname, dlen, sname, slen, conv_f); } -#define ILLEGAL_CHAR_MARK '_' -#define EXT_MARK '.' -#define CRC_MARK '#' -#define EXT_SIZE 5 -/* Number of chars we need to store generated CRC to make filename unique */ -#define CRC_LEN 5 - -static int udf_translate_to_linux(uint8_t *newName, int newLen, - uint8_t *udfName, int udfLen, - uint8_t *fidName, int fidNameLen) -{ - int index, newIndex = 0, needsCRC = 0; - int extIndex = 0, newExtIndex = 0, hasExt = 0; - unsigned short valueCRC; - uint8_t curr; - - if (udfName[0] == '.' && - (udfLen == 1 || (udfLen == 2 && udfName[1] == '.'))) { - needsCRC = 1; - newIndex = udfLen; - memcpy(newName, udfName, udfLen); - } else { - for (index = 0; index < udfLen; index++) { - curr = udfName[index]; - if (curr == '/' || curr == 0) { - needsCRC = 1; - curr = ILLEGAL_CHAR_MARK; - while (index + 1 < udfLen && - (udfName[index + 1] == '/' || - udfName[index + 1] == 0)) - index++; - } - if (curr == EXT_MARK && - (udfLen - index - 1) <= EXT_SIZE) { - if (udfLen == index + 1) - hasExt = 0; - else { - hasExt = 1; - extIndex = index; - newExtIndex = newIndex; - } - } - if (newIndex < newLen) - newName[newIndex++] = curr; - else - needsCRC = 1; - } - } - if (needsCRC) { - uint8_t ext[EXT_SIZE]; - int localExtIndex = 0; - - if (hasExt) { - int maxFilenameLen; - for (index = 0; - index < EXT_SIZE && extIndex + index + 1 < udfLen; - index++) { - curr = udfName[extIndex + index + 1]; - - if (curr == '/' || curr == 0) { - needsCRC = 1; - curr = ILLEGAL_CHAR_MARK; - while (extIndex + index + 2 < udfLen && - (index + 1 < EXT_SIZE && - (udfName[extIndex + index + 2] == '/' || - udfName[extIndex + index + 2] == 0))) - index++; - } - ext[localExtIndex++] = curr; - } - maxFilenameLen = newLen - CRC_LEN - localExtIndex; - if (newIndex > maxFilenameLen) - newIndex = maxFilenameLen; - else - newIndex = newExtIndex; - } else if (newIndex > newLen - CRC_LEN) - newIndex = newLen - CRC_LEN; - newName[newIndex++] = CRC_MARK; - valueCRC = crc_itu_t(0, fidName, fidNameLen); - newName[newIndex++] = hex_asc_upper_hi(valueCRC >> 8); - newName[newIndex++] = hex_asc_upper_lo(valueCRC >> 8); - newName[newIndex++] = hex_asc_upper_hi(valueCRC); - newName[newIndex++] = hex_asc_upper_lo(valueCRC); - - if (hasExt) { - newName[newIndex++] = EXT_MARK; - for (index = 0; index < localExtIndex; index++) - newName[newIndex++] = ext[index]; - } - } - - return newIndex; -} |