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require cipher-text to be padded to padsize

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@13174 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2003-12-02 16:32:25 +00:00
parent e30d6d0882
commit 84ca0906cd
1 changed files with 14 additions and 0 deletions
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14
lib/krb5/crypto.c
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@@ -3027,6 +3027,10 @@ decrypt_internal_derived(krb5_context context,
len -= checksum_sz; len -= checksum_sz;
if ((len % et->padsize) != 0) {
krb5_clear_error_string(context);
return KRB5_BAD_MSIZE;
}
ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey); ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
if(ret) { if(ret) {
free(p); free(p);
@@ -3086,6 +3090,11 @@ decrypt_internal(krb5_context context,
size_t checksum_sz, l; size_t checksum_sz, l;
struct encryption_type *et = crypto->et; struct encryption_type *et = crypto->et;
if ((len % et->padsize) != 0) {
krb5_clear_error_string(context);
return KRB5_BAD_MSIZE;
}
checksum_sz = CHECKSUMSIZE(et->checksum); checksum_sz = CHECKSUMSIZE(et->checksum);
p = malloc(len); p = malloc(len);
if(len != 0 && p == NULL) { if(len != 0 && p == NULL) {
@@ -3148,6 +3157,11 @@ decrypt_internal_special(krb5_context context,
char *tmp; char *tmp;
krb5_error_code ret; krb5_error_code ret;
if ((len % et->padsize) != 0) {
krb5_clear_error_string(context);
return KRB5_BAD_MSIZE;
}
tmp = malloc (sz); tmp = malloc (sz);
if (tmp == NULL) { if (tmp == NULL) {
krb5_set_error_string(context, "malloc: out of memory"); krb5_set_error_string(context, "malloc: out of memory");