17 |
|
|
18 |
#ifdef ENCRYPTED_PASSWORDS |
#ifdef ENCRYPTED_PASSWORDS |
19 |
extern char *passphr; |
extern char *passphr; |
20 |
|
|
21 |
#endif |
#endif |
22 |
|
|
23 |
/* |
/* |
24 |
* Get password from user interactively. |
* Get password from user interactively. |
25 |
*/ |
*/ |
26 |
void get_password(char *passwd, size_t pwlen) |
void |
27 |
|
get_password(char *passwd, size_t pwlen) |
28 |
{ |
{ |
29 |
char *c; |
char *c; |
30 |
|
|
31 |
tty_disable_echo(); |
tty_disable_echo(); |
32 |
|
|
33 |
if (fgets(passwd, pwlen, stdin)) |
if (fgets(passwd, pwlen, stdin)) |
34 |
if ((c = strchr(passwd, '\n'))) |
if ((c = strchr(passwd, '\n'))) |
35 |
*c = 0; |
*c = '\0'; |
36 |
|
|
37 |
tty_restore(); |
tty_restore(); |
38 |
|
|
39 |
putchar('\n'); |
putchar('\n'); |
40 |
} |
} |
41 |
|
|
42 |
|
|
43 |
#ifdef ENCRYPTED_PASSWORDS |
#ifdef ENCRYPTED_PASSWORDS |
44 |
/* |
/* |
45 |
* Encrypt and Base64 encode passwords. Append the MD5 checksum of the passwords |
* Encrypt and Base64 encode passwords. Append the MD5 checksum of the |
46 |
* before encrypting them. |
* passwords before encrypting them. |
47 |
*/ |
*/ |
48 |
int encrypt_passwords(FILE * fd, account_t * accts[]) |
int |
49 |
|
encrypt_passwords(FILE * fd, account_t * accts[]) |
50 |
{ |
{ |
51 |
int i; |
int i; |
52 |
char *c; |
char *c; |
53 |
unsigned char iv[EVP_MAX_IV_LENGTH]; |
unsigned char iv[EVP_MAX_IV_LENGTH]; |
54 |
unsigned char *key; |
unsigned char *key; |
55 |
unsigned char buf[ENCRYPTION_BUF]; |
unsigned char buf[ENCRYPTION_BUF]; |
56 |
unsigned char ebuf[ENCRYPTION_BUF]; |
unsigned char ebuf[ENCRYPTION_BUF]; |
57 |
unsigned char bbuf[ENCRYPTION_BUF]; |
unsigned char bbuf[ENCRYPTION_BUF]; |
58 |
unsigned char mdv[EVP_MAX_MD_SIZE]; |
unsigned char mdv[EVP_MAX_MD_SIZE]; |
59 |
int mdl, ebufl, bbufl; |
int mdl, ebufl, bbufl; |
60 |
EVP_CIPHER_CTX ctx; |
EVP_CIPHER_CTX ctx; |
61 |
EVP_MD_CTX mdctx; |
EVP_MD_CTX mdctx; |
62 |
EVP_ENCODE_CTX bctx; |
EVP_ENCODE_CTX bctx; |
63 |
|
|
64 |
key = (unsigned char *)smalloc(EVP_MAX_KEY_LENGTH); |
key = (unsigned char *)smalloc(EVP_MAX_KEY_LENGTH); |
65 |
|
|
66 |
srandom(time(NULL)); |
srandom(time(NULL)); |
67 |
|
|
68 |
/* Initialization vector. */ |
/* Initialization vector. */ |
69 |
c = ultostr(1 + random() % 100000000, 10); |
c = ultostr(1 + random() % 100000000, 10); |
70 |
memset(iv, '0', EVP_MAX_IV_LENGTH); |
memset(iv, '0', EVP_MAX_IV_LENGTH); |
71 |
memcpy(iv + 8 - strlen(c), c, min(8, strlen(c))); |
memcpy(iv + 8 - strlen(c), c, min(8, strlen(c))); |
72 |
fprintf(fd, "%.8s\n", iv); |
fprintf(fd, "%.8s\n", iv); |
73 |
|
|
74 |
EVP_CIPHER_CTX_init(&ctx); |
EVP_CIPHER_CTX_init(&ctx); |
75 |
|
|
76 |
EVP_BytesToKey(EVP_bf_cbc(), EVP_md5(), NULL, passphr, strlen(passphr), 1, |
EVP_BytesToKey(EVP_bf_cbc(), EVP_md5(), NULL, passphr, strlen(passphr), 1, |
77 |
key, NULL); |
key, NULL); |
78 |
|
|
79 |
EVP_DigestInit(&mdctx, EVP_md5()); |
EVP_DigestInit(&mdctx, EVP_md5()); |
80 |
EVP_EncryptInit(&ctx, EVP_bf_cbc(), key, iv); |
EVP_EncryptInit(&ctx, EVP_bf_cbc(), key, iv); |
81 |
EVP_EncodeInit(&bctx); |
EVP_EncodeInit(&bctx); |
82 |
|
|
83 |
for (i = 0; accts[i]; i++) { |
for (i = 0; accts[i] != NULL; i++) { |
84 |
snprintf(buf, ENCRYPTION_BUF, "%s %s %s\n", accts[i]->server, accts[i]->username, |
snprintf(buf, ENCRYPTION_BUF, "%s %s %s\n", accts[i]->server, |
85 |
accts[i]->password); |
accts[i]->username, accts[i]->password); |
86 |
|
|
87 |
|
EVP_DigestUpdate(&mdctx, buf, strlen(buf)); |
88 |
|
EVP_EncryptUpdate(&ctx, ebuf, &ebufl, buf, strlen(buf)); |
89 |
|
EVP_EncodeUpdate(&bctx, bbuf, &bbufl, ebuf, ebufl); |
90 |
|
|
91 |
EVP_DigestUpdate(&mdctx, buf, strlen(buf)); |
fwrite(bbuf, sizeof(char), bbufl, fd); |
92 |
EVP_EncryptUpdate(&ctx, ebuf, &ebufl, buf, strlen(buf)); |
} |
|
EVP_EncodeUpdate(&bctx, bbuf, &bbufl, ebuf, ebufl); |
|
|
|
|
|
fwrite(bbuf, sizeof(char), bbufl, fd); |
|
|
} |
|
93 |
|
|
94 |
EVP_DigestFinal(&mdctx, mdv, &mdl); |
EVP_DigestFinal(&mdctx, mdv, &mdl); |
95 |
|
|
96 |
xstrncpy(buf, ".\n", ENCRYPTION_BUF - 1); |
xstrncpy(buf, ".\n", ENCRYPTION_BUF - 1); |
97 |
|
|
98 |
/* MD5 checksum of data. */ |
/* MD5 checksum of data. */ |
99 |
for (i = 0; i < mdl; i++) |
for (i = 0; i < mdl; i++) |
100 |
snprintf(2 + buf + i * 2, ENCRYPTION_BUF - i * 2, "%02x", mdv[i]); |
snprintf(2 + buf + i * 2, ENCRYPTION_BUF - i * 2, "%02x", |
101 |
|
mdv[i]); |
102 |
|
|
103 |
EVP_EncryptUpdate(&ctx, ebuf, &ebufl, buf, strlen(buf)); |
EVP_EncryptUpdate(&ctx, ebuf, &ebufl, buf, strlen(buf)); |
104 |
EVP_EncodeUpdate(&bctx, bbuf, &bbufl, ebuf, ebufl); |
EVP_EncodeUpdate(&bctx, bbuf, &bbufl, ebuf, ebufl); |
105 |
fwrite(bbuf, sizeof(char), bbufl, fd); |
fwrite(bbuf, sizeof(char), bbufl, fd); |
106 |
|
|
107 |
EVP_EncryptFinal(&ctx, ebuf, &ebufl); |
EVP_EncryptFinal(&ctx, ebuf, &ebufl); |
108 |
EVP_EncodeUpdate(&bctx, bbuf, &bbufl, ebuf, ebufl); |
EVP_EncodeUpdate(&bctx, bbuf, &bbufl, ebuf, ebufl); |
109 |
EVP_EncodeFinal(&bctx, bbuf, &bbufl); |
EVP_EncodeFinal(&bctx, bbuf, &bbufl); |
110 |
|
|
111 |
fwrite(bbuf, sizeof(char), bbufl, fd); |
fwrite(bbuf, sizeof(char), bbufl, fd); |
112 |
|
|
113 |
EVP_CIPHER_CTX_cleanup(&ctx); |
EVP_CIPHER_CTX_cleanup(&ctx); |
114 |
|
|
115 |
return 0; |
return 0; |
116 |
} |
} |
117 |
|
|
118 |
|
|
119 |
/* |
/* |
120 |
* Decode (Base64) passwords, decrypt them and verify the MD5 checksum. |
* Decode (Base64) passwords, decrypt them and verify the MD5 checksum. |
121 |
*/ |
*/ |
122 |
int decrypt_passwords(unsigned char **buf, FILE * fd) |
int |
123 |
|
decrypt_passwords(unsigned char **buf, FILE * fd) |
124 |
{ |
{ |
125 |
int i, j = 1; |
int i, j; |
126 |
unsigned char iv[EVP_MAX_IV_LENGTH]; |
unsigned char iv[EVP_MAX_IV_LENGTH]; |
127 |
unsigned char *key; |
unsigned char *key; |
128 |
unsigned char *c; |
unsigned char *c; |
129 |
unsigned char ebuf[LINE_MAX]; |
unsigned char ebuf[LINE_MAX]; |
130 |
unsigned char bbuf[LINE_MAX]; |
unsigned char bbuf[LINE_MAX]; |
131 |
unsigned char mdv[EVP_MAX_MD_SIZE]; |
unsigned char mdv[EVP_MAX_MD_SIZE]; |
132 |
unsigned char mdc[EVP_MAX_MD_SIZE * 2 + 1]; |
unsigned char mdc[EVP_MAX_MD_SIZE * 2 + 1]; |
133 |
int mdl, bufl, ebufl; |
int mdl, bufl, ebufl; |
134 |
EVP_CIPHER_CTX *ctx; |
EVP_CIPHER_CTX *ctx; |
135 |
EVP_MD_CTX mdctx; |
EVP_MD_CTX mdctx; |
136 |
EVP_ENCODE_CTX bctx; |
EVP_ENCODE_CTX bctx; |
137 |
|
|
138 |
c = *buf = (unsigned char *)smalloc(DECRYPTION_BUF * sizeof(char)); |
j = 1; |
139 |
key = (unsigned char *)smalloc(EVP_MAX_KEY_LENGTH); |
|
140 |
ctx = (EVP_CIPHER_CTX *) smalloc(sizeof(EVP_CIPHER_CTX)); |
c = *buf = (unsigned char *)smalloc(DECRYPTION_BUF * sizeof(char)); |
141 |
|
key = (unsigned char *)smalloc(EVP_MAX_KEY_LENGTH); |
142 |
fgets(bbuf, LINE_MAX, fd); |
ctx = (EVP_CIPHER_CTX *) smalloc(sizeof(EVP_CIPHER_CTX)); |
143 |
|
|
144 |
memcpy(iv, bbuf, EVP_MAX_IV_LENGTH); |
fgets(bbuf, LINE_MAX, fd); |
145 |
|
|
146 |
EVP_CIPHER_CTX_init(ctx); |
memcpy(iv, bbuf, EVP_MAX_IV_LENGTH); |
147 |
|
|
148 |
EVP_BytesToKey(EVP_bf_cbc(), EVP_md5(), NULL, passphr, strlen(passphr), |
EVP_CIPHER_CTX_init(ctx); |
149 |
1, key, NULL); |
|
150 |
|
EVP_BytesToKey(EVP_bf_cbc(), EVP_md5(), NULL, passphr, strlen(passphr), |
151 |
EVP_DecryptInit(ctx, EVP_bf_cbc(), key, iv); |
1, key, NULL); |
152 |
EVP_DecodeInit(&bctx); |
|
153 |
|
EVP_DecryptInit(ctx, EVP_bf_cbc(), key, iv); |
154 |
while (fgets(bbuf, LINE_MAX, fd)) { |
EVP_DecodeInit(&bctx); |
155 |
EVP_DecodeUpdate(&bctx, ebuf, &ebufl, bbuf, strlen(bbuf)); |
|
156 |
if (!EVP_DecryptUpdate(ctx, c, &bufl, ebuf, ebufl)) |
while (fgets(bbuf, LINE_MAX, fd)) { |
157 |
goto fail; |
EVP_DecodeUpdate(&bctx, ebuf, &ebufl, bbuf, strlen(bbuf)); |
158 |
|
if (!EVP_DecryptUpdate(ctx, c, &bufl, ebuf, ebufl)) |
159 |
c += bufl; |
goto fail; |
160 |
*c = 0; |
|
161 |
|
c += bufl; |
162 |
if (c - *buf > DECRYPTION_BUF * j - 64) { |
*c = '\0'; |
163 |
i = c - *buf; |
|
164 |
*buf = (char *)srealloc(*buf, DECRYPTION_BUF * ++j); |
if (c - *buf > DECRYPTION_BUF * j - 64) { |
165 |
c = *buf + i; |
i = c - *buf; |
166 |
*c = 0; |
*buf = (char *)srealloc(*buf, DECRYPTION_BUF * ++j); |
167 |
|
c = *buf + i; |
168 |
|
*c = '\0'; |
169 |
|
} |
170 |
} |
} |
|
} |
|
171 |
|
|
172 |
EVP_DecodeFinal(&bctx, ebuf, &ebufl); |
EVP_DecodeFinal(&bctx, ebuf, &ebufl); |
173 |
if (!EVP_DecryptFinal(ctx, c, &bufl)) |
if (!EVP_DecryptFinal(ctx, c, &bufl)) |
174 |
goto fail; |
goto fail; |
175 |
|
|
176 |
c += bufl; |
c += bufl; |
177 |
*c = 0; |
*c = '\0'; |
178 |
|
|
179 |
/* Calculate the MD5 checksum and check if it is correct. */ |
/* Calculate the MD5 checksum and check if it is correct. */ |
180 |
if (!(c = strstr(*buf, "\n.\n"))) |
if (!(c = strstr(*buf, "\n.\n"))) |
181 |
goto fail; |
goto fail; |
182 |
|
|
183 |
EVP_DigestInit(&mdctx, EVP_md5()); |
EVP_DigestInit(&mdctx, EVP_md5()); |
184 |
EVP_DigestUpdate(&mdctx, *buf, c - *buf + 1); |
EVP_DigestUpdate(&mdctx, *buf, c - *buf + 1); |
185 |
EVP_DigestFinal(&mdctx, mdv, &mdl); |
EVP_DigestFinal(&mdctx, mdv, &mdl); |
186 |
|
|
187 |
for (i = 0; i < mdl; i++) |
for (i = 0; i < mdl; i++) |
188 |
snprintf(mdc + i * 2, EVP_MAX_MD_SIZE * 2 + 1 - i * 2, "%02x", mdv[i]); |
snprintf(mdc + i * 2, EVP_MAX_MD_SIZE * 2 + 1 - i * 2, "%02x", |
189 |
|
mdv[i]); |
190 |
|
|
191 |
c += 3; |
c += 3; |
192 |
|
|
193 |
if (strncmp(c, mdc, 32)) |
if (strncmp(c, mdc, 32)) |
194 |
goto fail; |
goto fail; |
195 |
|
|
196 |
EVP_CIPHER_CTX_cleanup(ctx); |
EVP_CIPHER_CTX_cleanup(ctx); |
197 |
|
|
198 |
sfree(key); |
sfree(key); |
199 |
sfree(ctx); |
sfree(ctx); |
200 |
|
|
201 |
return 0; |
return 0; |
202 |
|
|
203 |
fail: |
fail: |
204 |
error("Wrong master passphrase.\n"); |
error("Wrong master passphrase.\n"); |
205 |
EVP_CIPHER_CTX_cleanup(ctx); |
EVP_CIPHER_CTX_cleanup(ctx); |
206 |
sfree(*buf); |
sfree(*buf); |
207 |
sfree(key); |
sfree(key); |
208 |
sfree(ctx); |
sfree(ctx); |
209 |
|
|
210 |
return ERROR_DECRYPT; |
return ERROR_DECRYPT; |
211 |
} |
} |
212 |
|
|
213 |
|
|
214 |
/* |
/* |
215 |
* Interactive encrypted passwords editor. |
* Interactive encrypted passwords editor. |
216 |
*/ |
*/ |
217 |
void password_editor(void) |
void |
218 |
|
password_editor(void) |
219 |
{ |
{ |
220 |
int i, q, n; |
int i, q, n; |
221 |
char buf[LINE_MAX]; |
char buf[LINE_MAX]; |
222 |
char *c; |
char *c; |
223 |
char *p[2]; |
char *p[2]; |
224 |
account_t *a, *accts[EDITOR_PASSWORDS_MAX]; |
account_t *a, *accts[EDITOR_PASSWORDS_MAX]; |
225 |
|
|
226 |
if (!(flags & FLAG_BLANK_PASSWORD)) { |
if (!(flags & FLAG_BLANK_PASSWORD)) { |
227 |
error("imapfilter: no candidate passwords for encryption found\n"); |
error("no candidate passwords for encryption found\n"); |
228 |
return; |
return; |
|
} |
|
|
q = 0; |
|
|
|
|
|
memset(accts, 0, EDITOR_PASSWORDS_MAX); |
|
|
|
|
|
for (i = 0, a = accounts; i < EDITOR_PASSWORDS_MAX - 1 && a; a = a->next) { |
|
|
if (a->passwdattr == PASSWORD_NONE || |
|
|
a->passwdattr == PASSWORD_ENCRYPTED) |
|
|
accts[i++] = a; |
|
|
} |
|
|
|
|
|
do { |
|
|
printf("command: "); |
|
|
fgets(buf, LINE_MAX, stdin); |
|
|
c = buf; |
|
|
for (;; c++) { |
|
|
if (*c == ' ' || *c == '\t') |
|
|
continue; |
|
|
else if (*c == '?' || *c == 'h') |
|
|
printf("c clear a password entry\n" |
|
|
"e edit a password entry\n" |
|
|
"h help\n" |
|
|
"l list entries\n" |
|
|
"p change master password\n" |
|
|
"q quit without saving\n" |
|
|
"s save changes\n" |
|
|
"x save and exit\n"); |
|
|
else if (*c == 'q') |
|
|
q = 1; |
|
|
else if (*c == 'l') |
|
|
for (i = 0; accts[i]; i++) |
|
|
printf("%d %s %s %s\n", i + 1, accts[i]->server, |
|
|
accts[i]->username, accts[i]->password); |
|
|
else if (*c == 'e') { |
|
|
n = atoi(++c); |
|
|
if (!n || n < 1 || n > 128 || !accts[n - 1]) |
|
|
break; |
|
|
accts[n - 1]->password[0] = 0; |
|
|
printf("Enter new password: "); |
|
|
if (fgets(accts[n - 1]->password, PASSWORD_LEN, stdin)) |
|
|
if ((c = strchr(accts[n - 1]->password, '\n'))) |
|
|
*c = 0; |
|
|
} else if (*c == 'c') { |
|
|
n = atoi(++c); |
|
|
if (!n || n < 1 || n > 128 || !accts[n - 1]) |
|
|
break; |
|
|
accts[n - 1]->password[0] = 0; |
|
|
} else if (*c == 'p') { |
|
|
p[0] = (char *)smalloc(PASSPHRASE_LEN); |
|
|
p[1] = (char *)smalloc(PASSPHRASE_LEN); |
|
|
do { |
|
|
for (i = 0; i < 2; i++) { |
|
|
printf("Enter %snew master password: ", |
|
|
i ? "again " : ""); |
|
|
get_password(p[i], PASSPHRASE_LEN); |
|
|
} |
|
|
} while (strcmp(p[0], p[1])); |
|
|
xstrncpy(passphr, p[0], PASSPHRASE_LEN - 1); |
|
|
sfree(p[0]); |
|
|
sfree(p[1]); |
|
|
} else if (*c == 's') { |
|
|
store_passwords(accts); |
|
|
} else if (*c == 'x') { |
|
|
store_passwords(accts); |
|
|
q = 1; |
|
|
} else |
|
|
break; |
|
229 |
} |
} |
230 |
} while (!q); |
q = 0; |
231 |
|
|
232 |
|
memset(accts, 0, EDITOR_PASSWORDS_MAX); |
233 |
|
|
234 |
|
for (i = 0, a = accounts; i < EDITOR_PASSWORDS_MAX - 1 && a != NULL; |
235 |
|
a = a->next) { |
236 |
|
if (a->passwdattr == PASSWORD_NONE || |
237 |
|
a->passwdattr == PASSWORD_ENCRYPTED) |
238 |
|
accts[i++] = a; |
239 |
|
} |
240 |
|
|
241 |
|
do { |
242 |
|
printf("command: "); |
243 |
|
fgets(buf, LINE_MAX, stdin); |
244 |
|
c = buf; |
245 |
|
for (;; c++) { |
246 |
|
if (*c == ' ' || *c == '\t') |
247 |
|
continue; |
248 |
|
else if (*c == '?' || *c == 'h') |
249 |
|
printf("c\tclear a password entry\n" |
250 |
|
"e\tedit a password entry\n" |
251 |
|
"h\thelp\n" |
252 |
|
"l\tlist entries\n" |
253 |
|
"p\tchange master password\n" |
254 |
|
"q\tquit without saving\n" |
255 |
|
"s\tsave changes\n" |
256 |
|
"x\tsave and exit\n"); |
257 |
|
else if (*c == 'q') |
258 |
|
q = 1; |
259 |
|
else if (*c == 'l') |
260 |
|
for (i = 0; accts[i] != NULL; i++) |
261 |
|
printf("%d %s %s %s\n", i + 1, |
262 |
|
accts[i]->server, |
263 |
|
accts[i]->username, |
264 |
|
accts[i]->password); |
265 |
|
else if (*c == 'e') { |
266 |
|
n = atoi(++c); |
267 |
|
if (n == 0 || n < 1 || n > 128 || |
268 |
|
accts[n - 1] == NULL) |
269 |
|
break; |
270 |
|
accts[n - 1]->password[0] = '\0'; |
271 |
|
printf("Enter new password: "); |
272 |
|
if (fgets(accts[n - 1]->password, PASSWORD_LEN, |
273 |
|
stdin) && |
274 |
|
(c = strchr(accts[n - 1]->password, '\n'))) |
275 |
|
*c = '\0'; |
276 |
|
} else if (*c == 'c') { |
277 |
|
n = atoi(++c); |
278 |
|
if (n == 0 || n < 1 || n > 128 || |
279 |
|
accts[n - 1] == NULL) |
280 |
|
break; |
281 |
|
accts[n - 1]->password[0] = '\0'; |
282 |
|
} else if (*c == 'p') { |
283 |
|
p[0] = (char *)smalloc(PASSPHRASE_LEN); |
284 |
|
p[1] = (char *)smalloc(PASSPHRASE_LEN); |
285 |
|
do { |
286 |
|
for (i = 0; i < 2; i++) { |
287 |
|
printf("Enter %snew master " |
288 |
|
"password: ", |
289 |
|
i ? "again " : ""); |
290 |
|
get_password(p[i], |
291 |
|
PASSPHRASE_LEN); |
292 |
|
} |
293 |
|
} while (strcmp(p[0], p[1])); |
294 |
|
xstrncpy(passphr, p[0], PASSPHRASE_LEN - 1); |
295 |
|
sfree(p[0]); |
296 |
|
sfree(p[1]); |
297 |
|
} else if (*c == 's') { |
298 |
|
store_passwords(accts); |
299 |
|
} else if (*c == 'x') { |
300 |
|
store_passwords(accts); |
301 |
|
q = 1; |
302 |
|
} else |
303 |
|
break; |
304 |
|
} |
305 |
|
} while (!q); |
306 |
} |
} |
307 |
|
|
308 |
#endif |
#endif /* ENCRYPTED_PASSWORDS */ |