115: void readPasswords() {
116:   struct passwd *pwd;
117:   struct spwd *spwd = NULL;
118:   if (!(pwd = getpwnam(userName))) {
119:     writeMsg("no entry for %s in /etc/passwd\n",userName);
120:     exit(3);
121:   } else {
122:     encryptedPassword = pwd->pw_passwd;
123:     userId = pwd->pw_uid;
124:     groupId = pwd->pw_gid;
125:   }
126:   endpwent();
127:
128:   if (strcmp(encryptedPassword,"x") == 0 || strcmp(encryptedPassword,"*") == 0) {
129:     if (!(spwd = getspnam(userName))) {
130:       writeMsg("no entry for %s in /etc/shadow\n",userName);
131:       exit(3);
132:     } else
133:       encryptedPassword = spwd->sp_pwdp;
134:     endspent();
135:   }
136:   writeMsg("encrypted password: %s\n",encryptedPassword);
137:   writeMsg("numeric user-id: %lu\n",userId);
138:   writeMsg("numeric group-id: %lu\n",groupId);
139: }
140:
143: int checkPassword() {
144:   int rc;
145:
146:   if (*clearTextPassword == '\0' && (
147:         encryptedPassword == (char *) 0 || *encryptedPassword == '\0'))
148:     return OK;
149:   else if (*clearTextPassword != '\0' && (
150:        encryptedPassword == (char *) 0 || *encryptedPassword == '\0')) {
151:     bzero(clearTextPassword,strlen(clearTextPassword));
152:     return FAILED;
153:   }
154:
155:   rc = strcmp(encryptPassword(),encryptedPassword);
156:   bzero(clearTextPassword,strlen(clearTextPassword));
157:   if (rc == 0)
158:     return OK;
159:   else
160:     return FAILED;
161: }
162:
165: char *encryptPassword() {
166:   static char cipher[128];
167:   char *p;
168:   const char *salt = encryptedPassword;
169:   p = crypt(clearTextPassword,salt);
170:   if (strlen(p) > sizeof(cipher)-1)
171:     p[sizeof(cipher)-1] = 0;
172:   strcpy(cipher,p);
173:   writeMsg("encrypted password: %s\n",cipher);
174:   return cipher;
175: }