diff options
Diffstat (limited to 'source4/librpc/ndr/ndr_string.c')
| -rw-r--r-- | source4/librpc/ndr/ndr_string.c | 499 |
1 files changed, 499 insertions, 0 deletions
diff --git a/source4/librpc/ndr/ndr_string.c b/source4/librpc/ndr/ndr_string.c new file mode 100644 index 0000000000..ee76508393 --- /dev/null +++ b/source4/librpc/ndr/ndr_string.c @@ -0,0 +1,499 @@ +/* + Unix SMB/CIFS implementation. + + routines for marshalling/unmarshalling string types + + Copyright (C) Andrew Tridgell 2003 + + 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" +#include "system/network.h" + +/* + pull a general string from the wire +*/ +NTSTATUS ndr_pull_string(struct ndr_pull *ndr, int ndr_flags, const char **s) +{ + char *as=NULL; + uint32_t len1, ofs, len2; + uint16_t len3; + int ret; + int chset = CH_UTF16; + unsigned byte_mul = 2; + unsigned flags = ndr->flags; + unsigned c_len_term = 0; + + if (!(ndr_flags & NDR_SCALARS)) { + return NT_STATUS_OK; + } + + if (NDR_BE(ndr)) { + chset = CH_UTF16BE; + } + + if (flags & LIBNDR_FLAG_STR_ASCII) { + chset = CH_DOS; + byte_mul = 1; + flags &= ~LIBNDR_FLAG_STR_ASCII; + } + + if (flags & LIBNDR_FLAG_STR_UTF8) { + chset = CH_UTF8; + byte_mul = 1; + flags &= ~LIBNDR_FLAG_STR_UTF8; + } + + flags &= ~LIBNDR_FLAG_STR_CONFORMANT; + if (flags & LIBNDR_FLAG_STR_CHARLEN) { + c_len_term = 1; + flags &= ~LIBNDR_FLAG_STR_CHARLEN; + } + + switch (flags & LIBNDR_STRING_FLAGS) { + case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4: + case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM: + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1)); + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs)); + if (ofs != 0) { + return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n", + ndr->flags & LIBNDR_STRING_FLAGS); + } + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len2)); + if (len2 > len1) { + return ndr_pull_error(ndr, NDR_ERR_STRING, + "Bad string lengths len1=%u ofs=%u len2=%u\n", + len1, ofs, len2); + } + if (len2 == 0) { + *s = talloc_strdup(ndr, ""); + break; + } + NDR_PULL_NEED_BYTES(ndr, (len2 + c_len_term)*byte_mul); + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + (len2 + c_len_term)*byte_mul, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, (len2 + c_len_term)*byte_mul)); + + /* this is a way of detecting if a string is sent with the wrong + termination */ + if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) { + if (strlen(as) < (len2 + c_len_term)) { + DEBUG(6,("short string '%s'\n", as)); + } + } else { + if (strlen(as) == (len2 + c_len_term)) { + DEBUG(6,("long string '%s'\n", as)); + } + } + *s = as; + break; + + case LIBNDR_FLAG_STR_SIZE4: + case LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM: + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1)); + NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul); + if (len1 == 0) { + *s = talloc_strdup(ndr, ""); + break; + } + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + (len1 + c_len_term)*byte_mul, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul)); + + /* this is a way of detecting if a string is sent with the wrong + termination */ + if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) { + if (strlen(as) < (len1 + c_len_term)) { + DEBUG(6,("short string '%s'\n", as)); + } + } else { + if (strlen(as) == (len1 + c_len_term)) { + DEBUG(6,("long string '%s'\n", as)); + } + } + *s = as; + break; + + case LIBNDR_FLAG_STR_LEN4: + case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_NOTERM: + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs)); + if (ofs != 0) { + return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n", + ndr->flags & LIBNDR_STRING_FLAGS); + } + NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1)); + NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul); + if (len1 == 0) { + *s = talloc_strdup(ndr, ""); + break; + } + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + (len1 + c_len_term)*byte_mul, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul)); + + /* this is a way of detecting if a string is sent with the wrong + termination */ + if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) { + if (strlen(as) < (len1 + c_len_term)) { + DEBUG(6,("short string '%s'\n", as)); + } + } else { + if (strlen(as) == (len1 + c_len_term)) { + DEBUG(6,("long string '%s'\n", as)); + } + } + *s = as; + break; + + + case LIBNDR_FLAG_STR_SIZE2: + case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM: + NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3)); + NDR_PULL_NEED_BYTES(ndr, (len3 + c_len_term)*byte_mul); + if (len3 == 0) { + *s = talloc_strdup(ndr, ""); + break; + } + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + (len3 + c_len_term)*byte_mul, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, (len3 + c_len_term)*byte_mul)); + + /* this is a way of detecting if a string is sent with the wrong + termination */ + if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) { + if (strlen(as) < (len3 + c_len_term)) { + DEBUG(6,("short string '%s'\n", as)); + } + } else { + if (strlen(as) == (len3 + c_len_term)) { + DEBUG(6,("long string '%s'\n", as)); + } + } + *s = as; + break; + + case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_STR_BYTESIZE: + NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3)); + NDR_PULL_NEED_BYTES(ndr, len3); + if (len3 == 0) { + *s = talloc_strdup(ndr, ""); + break; + } + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + len3, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, len3)); + *s = as; + break; + + case LIBNDR_FLAG_STR_NULLTERM: + if (byte_mul == 1) { + len1 = ascii_len_n((const char *)(ndr->data+ndr->offset), ndr->data_size - ndr->offset); + } else { + len1 = utf16_len_n(ndr->data+ndr->offset, ndr->data_size - ndr->offset); + } + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + len1, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, len1)); + *s = as; + break; + + case LIBNDR_FLAG_STR_FIXLEN15: + case LIBNDR_FLAG_STR_FIXLEN32: + len1 = (flags & LIBNDR_FLAG_STR_FIXLEN32)?32:15; + NDR_PULL_NEED_BYTES(ndr, len1*byte_mul); + ret = convert_string_talloc(ndr, chset, CH_UNIX, + ndr->data+ndr->offset, + len1*byte_mul, + (void **)&as); + if (ret == -1) { + return ndr_pull_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + NDR_CHECK(ndr_pull_advance(ndr, len1*byte_mul)); + *s = as; + break; + + default: + return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n", + ndr->flags & LIBNDR_STRING_FLAGS); + } + + return NT_STATUS_OK; +} + + +/* + push a general string onto the wire +*/ +NTSTATUS ndr_push_string(struct ndr_push *ndr, int ndr_flags, const char *s) +{ + ssize_t s_len, c_len, d_len; + int ret; + int chset = CH_UTF16; + unsigned flags = ndr->flags; + unsigned byte_mul = 2; + unsigned c_len_term = 1; + + if (!(ndr_flags & NDR_SCALARS)) { + return NT_STATUS_OK; + } + + if (NDR_BE(ndr)) { + chset = CH_UTF16BE; + } + + s_len = s?strlen(s):0; + c_len = s?strlen_m(s):0; + + if (flags & LIBNDR_FLAG_STR_ASCII) { + chset = CH_DOS; + byte_mul = 1; + flags &= ~LIBNDR_FLAG_STR_ASCII; + } + + if (flags & LIBNDR_FLAG_STR_UTF8) { + chset = CH_UTF8; + byte_mul = 1; + flags &= ~LIBNDR_FLAG_STR_UTF8; + } + + flags &= ~LIBNDR_FLAG_STR_CONFORMANT; + + if (flags & LIBNDR_FLAG_STR_CHARLEN) { + c_len_term = 0; + flags &= ~LIBNDR_FLAG_STR_CHARLEN; + } + + switch (flags & LIBNDR_STRING_FLAGS) { + case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4: + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len+c_len_term)); + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0)); + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len+c_len_term)); + NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1)); + ret = convert_string(CH_UNIX, chset, + s, s_len+1, + ndr->data+ndr->offset, + byte_mul*(c_len+1)); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*(c_len+1); + break; + + case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM: + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len)); + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0)); + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len)); + NDR_PUSH_NEED_BYTES(ndr, c_len*byte_mul); + ret = convert_string(CH_UNIX, chset, + s, s_len, + ndr->data+ndr->offset, c_len*byte_mul); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += c_len*byte_mul; + break; + + case LIBNDR_FLAG_STR_LEN4: + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0)); + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len + c_len_term)); + NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1)); + ret = convert_string(CH_UNIX, chset, + s, s_len + 1, + ndr->data+ndr->offset, byte_mul*(c_len+1)); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*(c_len+1); + break; + + case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_NOTERM: + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0)); + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len)); + NDR_PUSH_NEED_BYTES(ndr, byte_mul*c_len); + ret = convert_string(CH_UNIX, chset, + s, s_len, + ndr->data+ndr->offset, byte_mul*c_len); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*c_len; + break; + + case LIBNDR_FLAG_STR_SIZE4: + NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len + c_len_term)); + NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1)); + ret = convert_string(CH_UNIX, chset, + s, s_len + 1, + ndr->data+ndr->offset, byte_mul*(c_len+1)); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*(c_len+1); + break; + + case LIBNDR_FLAG_STR_SIZE2: + NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, c_len + c_len_term)); + NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1)); + ret = convert_string(CH_UNIX, chset, + s, s_len + 1, + ndr->data+ndr->offset, byte_mul*(c_len+1)); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*(c_len+1); + break; + + case LIBNDR_FLAG_STR_NULLTERM: + NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1)); + ret = convert_string(CH_UNIX, chset, + s, s_len+1, + ndr->data+ndr->offset, byte_mul*(c_len+1)); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*(c_len+1); + break; + + case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_STR_BYTESIZE: + NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, c_len*byte_mul)); + NDR_PUSH_NEED_BYTES(ndr, c_len*byte_mul); + ret = convert_string(CH_UNIX, chset, + s, s_len, + ndr->data+ndr->offset, c_len*byte_mul); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += c_len*byte_mul; + break; + + case LIBNDR_FLAG_STR_FIXLEN15: + case LIBNDR_FLAG_STR_FIXLEN32: + d_len = (flags & LIBNDR_FLAG_STR_FIXLEN32)?32:15; + NDR_PUSH_NEED_BYTES(ndr, byte_mul*d_len); + ret = convert_string(CH_UNIX, chset, + s, s_len, + ndr->data+ndr->offset, byte_mul*d_len); + if (ret == -1) { + return ndr_push_error(ndr, NDR_ERR_CHARCNV, + "Bad character conversion"); + } + ndr->offset += byte_mul*d_len; + break; + + default: + return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n", + ndr->flags & LIBNDR_STRING_FLAGS); + } + + return NT_STATUS_OK; +} + +/* + push a general string onto the wire +*/ +size_t ndr_string_array_size(struct ndr_push *ndr, const char *s) +{ + size_t c_len; + unsigned flags = ndr->flags; + unsigned byte_mul = 2; + unsigned c_len_term = 1; + + if (flags & LIBNDR_FLAG_STR_FIXLEN32) { + return 32; + } + if (flags & LIBNDR_FLAG_STR_FIXLEN15) { + return 15; + } + + c_len = s?strlen_m(s):0; + + if (flags & (LIBNDR_FLAG_STR_ASCII|LIBNDR_FLAG_STR_UTF8)) { + byte_mul = 1; + } + + if (flags & LIBNDR_FLAG_STR_NOTERM) { + c_len_term = 0; + } + + c_len = c_len + c_len_term; + + if (flags & LIBNDR_FLAG_STR_BYTESIZE) { + c_len = c_len * byte_mul; + } + + return c_len; +} + +void ndr_print_string(struct ndr_print *ndr, const char *name, const char *s) +{ + if (s) { + ndr->print(ndr, "%-25s: '%s'", name, s); + } else { + ndr->print(ndr, "%-25s: NULL", name); + } +} + +uint32_t ndr_size_string(int ret, const char * const* string, int flags) +{ + /* FIXME: Is this correct for all strings ? */ + if(!(*string)) return ret; + return ret+strlen(*string)+1; +} |