diff options
Diffstat (limited to 'third_party/heimdal/lib/krb5/data.c')
| -rw-r--r-- | third_party/heimdal/lib/krb5/data.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/data.c b/third_party/heimdal/lib/krb5/data.c new file mode 100644 index 0000000..abfa053 --- /dev/null +++ b/third_party/heimdal/lib/krb5/data.c @@ -0,0 +1,228 @@ +/* + * Copyright (c) 1997 - 2007 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "krb5_locl.h" + +/** + * Reset the (potentially uninitialized) krb5_data structure. + * + * @param p krb5_data to reset. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_data_zero(krb5_data *p) +{ + p->length = 0; + p->data = NULL; +} + +/** + * Free the content of krb5_data structure, its ok to free a zeroed + * structure (with memset() or krb5_data_zero()). When done, the + * structure will be zeroed. The same function is called + * krb5_free_data_contents() in MIT Kerberos. + * + * @param p krb5_data to free. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_data_free(krb5_data *p) +{ + free(p->data); + krb5_data_zero(p); +} + +/** + * Free krb5_data (and its content). + * + * @param context Kerberos 5 context. + * @param p krb5_data to free. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_free_data(krb5_context context, + krb5_data *p) +{ + krb5_data_free(p); + free(p); +} + +/** + * Allocate data of and krb5_data. + * + * @param p krb5_data to allocate. + * @param len size to allocate. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_data_alloc(krb5_data *p, int len) +{ + p->data = malloc(len); + if(len && p->data == NULL) + return ENOMEM; + p->length = len; + return 0; +} + +/** + * Grow (or shrink) the content of krb5_data to a new size. + * + * @param p krb5_data to free. + * @param len new size. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_data_realloc(krb5_data *p, int len) +{ + void *tmp; + tmp = realloc(p->data, len); + if(len && !tmp) + return ENOMEM; + p->data = tmp; + p->length = len; + return 0; +} + +/** + * Copy the data of len into the krb5_data. + * + * @param p krb5_data to copy into. + * @param data data to copy.. + * @param len new size. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_data_copy(krb5_data *p, const void *data, size_t len) +{ + if (len) { + if(krb5_data_alloc(p, len)) + return ENOMEM; + memcpy(p->data, data, len); + } else + p->data = NULL; + p->length = len; + return 0; +} + +/** + * Copy the data into a newly allocated krb5_data. + * + * @param context Kerberos 5 context. + * @param indata the krb5_data data to copy + * @param outdata new krb5_date to copy too. Free with krb5_free_data(). + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_copy_data(krb5_context context, + const krb5_data *indata, + krb5_data **outdata) +{ + krb5_error_code ret; + ALLOC(*outdata, 1); + if(*outdata == NULL) + return krb5_enomem(context); + ret = der_copy_octet_string(indata, *outdata); + if(ret) { + krb5_clear_error_message (context); + free(*outdata); + *outdata = NULL; + } + return ret; +} + +/** + * Compare to data. + * + * @param data1 krb5_data to compare + * @param data2 krb5_data to compare + * + * @return return the same way as memcmp(), useful when sorting. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION int KRB5_LIB_CALL +krb5_data_cmp(const krb5_data *data1, const krb5_data *data2) +{ + size_t len = data1->length < data2->length ? data1->length : data2->length; + int cmp = memcmp(data1->data, data2->data, len); + + if (cmp == 0) + return data1->length - data2->length; + return cmp; +} + +/** + * Compare to data not exposing timing information from the checksum data + * + * @param data1 krb5_data to compare + * @param data2 krb5_data to compare + * + * @return returns zero for same data, otherwise non zero. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION int KRB5_LIB_CALL +krb5_data_ct_cmp(const krb5_data *data1, const krb5_data *data2) +{ + if (data1->length != data2->length) + return data1->length - data2->length; + return ct_memcmp(data1->data, data2->data, data1->length); +} |