diff options
Diffstat (limited to 'crypto/kerberosIV/lib/kadm/kadm_stream.c')
-rw-r--r-- | crypto/kerberosIV/lib/kadm/kadm_stream.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/kadm/kadm_stream.c b/crypto/kerberosIV/lib/kadm/kadm_stream.c new file mode 100644 index 0000000..33fe177 --- /dev/null +++ b/crypto/kerberosIV/lib/kadm/kadm_stream.c @@ -0,0 +1,299 @@ +/* + Copyright (C) 1989 by the Massachusetts Institute of Technology + + Export of this software from the United States of America is assumed + to require a specific license from the United States Government. + It is the responsibility of any person or organization contemplating + export to obtain such a license before exporting. + +WITHIN THAT CONSTRAINT, permission to use, copy, modify, and +distribute this software and its documentation for any purpose and +without fee is hereby granted, provided that the above copyright +notice appear in all copies and that both that copyright notice and +this permission notice appear in supporting documentation, and that +the name of M.I.T. not be used in advertising or publicity pertaining +to distribution of the software without specific, written prior +permission. M.I.T. makes no representations about the suitability of +this software for any purpose. It is provided "as is" without express +or implied warranty. + + */ + +/* + * Stream conversion functions for Kerberos administration server + */ + +/* + kadm_stream.c + this holds the stream support routines for the kerberos administration server + + vals_to_stream: converts a vals struct to a stream for transmission + internals build_field_header, vts_[string, char, long, short] + stream_to_vals: converts a stream to a vals struct + internals check_field_header, stv_[string, char, long, short] + error: prints out a kadm error message, returns + fatal: prints out a kadm fatal error message, exits +*/ + +#include "kadm_locl.h" + +RCSID("$Id: kadm_stream.c,v 1.11 1997/05/02 10:28:05 joda Exp $"); + +static int +build_field_header(u_char *cont, u_char **st) + /* container for fields data */ + /* stream */ +{ + *st = (u_char *) malloc (4); + memcpy(*st, cont, 4); + return 4; /* return pointer to current stream location */ +} + +static int +check_field_header(u_char *st, u_char *cont, int maxlen) + /* stream */ + /* container for fields data */ + +{ + if (4 > maxlen) + return(-1); + memcpy(cont, st, 4); + return 4; /* return pointer to current stream location */ +} + +int +vts_string(char *dat, u_char **st, int loc) + /* a string to put on the stream */ + /* base pointer to the stream */ + /* offset into the stream for current data */ +{ + *st = (u_char *) realloc (*st, (unsigned) (loc + strlen(dat) + 1)); + memcpy(*st + loc, dat, strlen(dat)+1); + return strlen(dat)+1; +} + + +static int +vts_short(u_int16_t dat, u_char **st, int loc) + /* the attributes field */ + /* a base pointer to the stream */ + /* offset into the stream for current data */ +{ + unsigned char *p; + p = realloc(*st, loc + 2); + if(p == NULL){ + abort(); + } + p[loc] = (dat >> 8) & 0xff; + p[loc+1] = dat & 0xff; + *st = p; + return 2; +} + +static int +vts_char(u_char dat, u_char **st, int loc) + /* the attributes field */ + /* a base pointer to the stream */ + /* offset into the stream for current data */ +{ + unsigned char *p = realloc(*st, loc + 1); + if(p == NULL){ + abort(); + } + p[loc] = dat; + *st = p; + return 1; +} + +int +vts_long(u_int32_t dat, u_char **st, int loc) + /* the attributes field */ + /* a base pointer to the stream */ + /* offset into the stream for current data */ +{ + unsigned char *p = realloc(*st, loc + 4); + if(p == NULL){ + abort(); + } + p[loc] = (dat >> 24) & 0xff; + p[loc+1] = (dat >> 16) & 0xff; + p[loc+2] = (dat >> 8) & 0xff; + p[loc+3] = dat & 0xff; + *st = p; + return 4; +} + +int +stv_string(u_char *st, /* base pointer to the stream */ + char *dat, /* a string to read from the stream */ + int loc, /* offset into the stream for current data */ + int stlen, /* max length of string to copy in */ + int maxlen) /* max length of input stream */ +{ + int maxcount; /* max count of chars to copy */ + + maxcount = min(maxlen - loc, stlen); + + if(maxcount <= 0) + return -1; + + strncpy(dat, (char *)st + loc, maxcount); + + if (dat[maxcount-1]) /* not null-term --> not enuf room */ + return(-1); + return strlen(dat)+1; +} + +static int +stv_short(u_char *st, u_int16_t *dat, int loc, int maxlen) + /* a base pointer to the stream */ + /* the attributes field */ + /* offset into the stream for current data */ + +{ + if (maxlen - loc < 2) + return -1; + + *dat = (st[loc] << 8) | st[loc + 1]; + return 2; +} + +int +stv_long(u_char *st, u_int32_t *dat, int loc, int maxlen) + /* a base pointer to the stream */ + /* the attributes field */ + /* offset into the stream for current data */ + /* maximum length of st */ +{ + if (maxlen - loc < 4) + return -1; + + *dat = (st[loc] << 24) | (st[loc+1] << 16) | (st[loc+2] << 8) | st[loc+3]; + return 4; +} + +static int +stv_char(u_char *st, u_char *dat, int loc, int maxlen) + /* a base pointer to the stream */ + /* the attributes field */ + /* offset into the stream for current data */ + +{ + if (maxlen - loc < 1) + return -1; + + *dat = st[loc]; + return 1; +} + +/* +vals_to_stream + recieves : kadm_vals *, u_char * + returns : a realloced and filled in u_char * + +this function creates a byte-stream representation of the kadm_vals structure +*/ +int +vals_to_stream(Kadm_vals *dt_in, u_char **dt_out) +{ + int vsloop, stsize; /* loop counter, stream size */ + + stsize = build_field_header(dt_in->fields, dt_out); + for (vsloop=31; vsloop>=0; vsloop--) + if (IS_FIELD(vsloop,dt_in->fields)) { + switch (vsloop) { + case KADM_NAME: + stsize+=vts_string(dt_in->name, dt_out, stsize); + break; + case KADM_INST: + stsize+=vts_string(dt_in->instance, dt_out, stsize); + break; + case KADM_EXPDATE: + stsize+=vts_long(dt_in->exp_date, dt_out, stsize); + break; + case KADM_ATTR: + stsize+=vts_short(dt_in->attributes, dt_out, stsize); + break; + case KADM_MAXLIFE: + stsize+=vts_char(dt_in->max_life, dt_out, stsize); + break; + case KADM_DESKEY: + stsize+=vts_long(dt_in->key_high, dt_out, stsize); + stsize+=vts_long(dt_in->key_low, dt_out, stsize); + break; + default: + break; + } +} + return(stsize); +} + +/* +stream_to_vals + recieves : u_char *, kadm_vals * + returns : a kadm_vals filled in according to u_char * + +this decodes a byte stream represntation of a vals struct into kadm_vals +*/ +int +stream_to_vals(u_char *dt_in, Kadm_vals *dt_out, int maxlen) + + + /* max length to use */ +{ + int vsloop, stsize; /* loop counter, stream size */ + int status; + + memset(dt_out, 0, sizeof(*dt_out)); + + stsize = check_field_header(dt_in, dt_out->fields, maxlen); + if (stsize < 0) + return(-1); + for (vsloop=31; vsloop>=0; vsloop--) + if (IS_FIELD(vsloop,dt_out->fields)) + switch (vsloop) { + case KADM_NAME: + if ((status = stv_string(dt_in, dt_out->name, stsize, + sizeof(dt_out->name), maxlen)) < 0) + return(-1); + stsize += status; + break; + case KADM_INST: + if ((status = stv_string(dt_in, dt_out->instance, stsize, + sizeof(dt_out->instance), maxlen)) < 0) + return(-1); + stsize += status; + break; + case KADM_EXPDATE: + if ((status = stv_long(dt_in, &dt_out->exp_date, stsize, + maxlen)) < 0) + return(-1); + stsize += status; + break; + case KADM_ATTR: + if ((status = stv_short(dt_in, &dt_out->attributes, stsize, + maxlen)) < 0) + return(-1); + stsize += status; + break; + case KADM_MAXLIFE: + if ((status = stv_char(dt_in, &dt_out->max_life, stsize, + maxlen)) < 0) + return(-1); + stsize += status; + break; + case KADM_DESKEY: + if ((status = stv_long(dt_in, &dt_out->key_high, stsize, + maxlen)) < 0) + return(-1); + stsize += status; + if ((status = stv_long(dt_in, &dt_out->key_low, stsize, + maxlen)) < 0) + return(-1); + stsize += status; + break; + default: + break; + } + return stsize; +} |