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(kt_add): check the return-value from fgets and overwrite the password

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for paranoid reasons


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6963 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1999-09-14 21:43:28 +00:00
parent d66db0b648
commit 27e22209fc
1 changed files with 16 additions and 6 deletions
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20
admin/ktutil.c
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@@ -197,7 +197,8 @@ kt_add(int argc, char **argv)
}
if(principal_string == NULL) {
printf("Principal: ");
fgets(buf, sizeof(buf), stdin);
if (fgets(buf, sizeof(buf), stdin) == NULL)
return 0;
buf[strcspn(buf, "\r\n")] = '\0';
principal_string = buf;
}
@@ -208,7 +209,10 @@ kt_add(int argc, char **argv)
}
if(enctype_string == NULL) {
printf("Encryption type: ");
fgets(buf, sizeof(buf), stdin);
if (fgets(buf, sizeof(buf), stdin) == NULL) {
krb5_free_principal (context, entry.principal);
return 0;
}
buf[strcspn(buf, "\r\n")] = '\0';
enctype_string = buf;
}
@@ -219,19 +223,24 @@ kt_add(int argc, char **argv)
enctype = t;
else {
krb5_warn(context, ret, "%s", enctype_string);
if(entry.principal)
krb5_free_principal(context, entry.principal);
return 0;
}
}
if(kvno == -1) {
printf("Key version: ");
fgets(buf, sizeof(buf), stdin);
if (fgets(buf, sizeof(buf), stdin) == NULL) {
krb5_free_principal (context, entry.principal);
return 0;
}
buf[strcspn(buf, "\r\n")] = '\0';
kvno = atoi(buf);
}
if(password_string == NULL && random_flag == 0) {
des_read_pw_string(buf, sizeof(buf), "Password: ", 1);
if(des_read_pw_string(buf, sizeof(buf), "Password: ", 1)) {
krb5_free_principal (context, entry.principal);
return 0;
}
password_string = buf;
}
if(password_string) {
@@ -250,6 +259,7 @@ kt_add(int argc, char **argv)
krb5_string_to_key(context, enctype, password_string,
entry.principal, &entry.keyblock);
}
memset (password_string, 0, strlen(password_string));
} else {
krb5_generate_random_keyblock(context, enctype, &entry.keyblock);
}