2 * Generic SSH public-key handling operations. In particular,
3 * reading of SSH public-key files, and also the generic `sign'
4 * operation for ssh2 (which checks the type of the key and
5 * dispatches to the appropriate key-type specific function).
15 #define PUT_32BIT(cp, value) do { \
17 (cp)[2] = (value) >> 8; \
18 (cp)[1] = (value) >> 16; \
19 (cp)[0] = (value) >> 24; } while (0)
21 #define GET_32BIT(cp) \
22 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
23 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
24 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
25 ((unsigned long)(unsigned char)(cp)[3]))
27 #define rsa_signature "SSH PRIVATE KEY FILE FORMAT 1.1\n"
29 #define BASE64_TOINT(x) ( (x)-'A'<26 ? (x)-'A'+0 :\
30 (x)-'a'<26 ? (x)-'a'+26 :\
31 (x)-'0'<10 ? (x)-'0'+52 :\
35 static int loadrsakey_main(FILE * fp, struct RSAKey *key, int pub_only,
36 char **commentptr, char *passphrase)
38 unsigned char buf[16384];
39 unsigned char keybuf[16];
43 struct MD5Context md5c;
46 /* Slurp the whole file (minus the header) into a buffer. */
47 len = fread(buf, 1, sizeof(buf), fp);
49 if (len < 0 || len == sizeof(buf))
50 goto end; /* file too big or not read */
55 * A zero byte. (The signature includes a terminating NUL.)
57 if (len - i < 1 || buf[i] != 0)
61 /* One byte giving encryption type, and one reserved uint32. */
65 if (ciphertype != 0 && ciphertype != SSH_CIPHER_3DES)
69 goto end; /* reserved field not present */
70 if (buf[i] != 0 || buf[i + 1] != 0 || buf[i + 2] != 0
71 || buf[i + 3] != 0) goto end; /* reserved field nonzero, panic! */
74 /* Now the serious stuff. An ordinary SSH 1 public key. */
75 i += makekey(buf + i, key, NULL, 1);
77 goto end; /* overran */
84 /* Next, the comment field. */
85 j = GET_32BIT(buf + i);
89 comment = smalloc(j + 1);
91 memcpy(comment, buf + i, j);
96 *commentptr = comment;
98 key->comment = comment;
100 return ciphertype != 0;
104 * Decrypt remainder of buffer.
108 MD5Update(&md5c, passphrase, strlen(passphrase));
109 MD5Final(keybuf, &md5c);
110 des3_decrypt_pubkey(keybuf, buf + i, (len - i + 7) & ~7);
111 memset(keybuf, 0, sizeof(keybuf)); /* burn the evidence */
115 * We are now in the secret part of the key. The first four
116 * bytes should be of the form a, b, a, b.
120 if (buf[i] != buf[i + 2] || buf[i + 1] != buf[i + 3]) {
127 * After that, we have one further bignum which is our
128 * decryption exponent, and then the three auxiliary values
131 i += makeprivate(buf + i, key);
134 i += ssh1_read_bignum(buf + i, &key->iqmp);
137 i += ssh1_read_bignum(buf + i, &key->q);
140 i += ssh1_read_bignum(buf + i, &key->p);
144 if (!rsa_verify(key)) {
151 memset(buf, 0, sizeof(buf)); /* burn the evidence */
155 int loadrsakey(char *filename, struct RSAKey *key, char *passphrase)
158 unsigned char buf[64];
160 fp = fopen(filename, "rb");
162 return 0; /* doesn't even exist */
165 * Read the first line of the file and see if it's a v1 private
168 if (fgets(buf, sizeof(buf), fp) && !strcmp(buf, rsa_signature)) {
169 return loadrsakey_main(fp, key, FALSE, NULL, passphrase);
173 * Otherwise, we have nothing. Return empty-handed.
180 * See whether an RSA key is encrypted. Return its comment field as
183 int rsakey_encrypted(char *filename, char **comment)
186 unsigned char buf[64];
188 fp = fopen(filename, "rb");
190 return 0; /* doesn't even exist */
193 * Read the first line of the file and see if it's a v1 private
196 if (fgets(buf, sizeof(buf), fp) && !strcmp(buf, rsa_signature)) {
197 return loadrsakey_main(fp, NULL, FALSE, comment, NULL);
200 return 0; /* wasn't the right kind of file */
204 * Return a malloc'ed chunk of memory containing the public blob of
205 * an RSA key, as given in the agent protocol (modulus bits,
206 * exponent, modulus).
208 int rsakey_pubblob(char *filename, void **blob, int *bloblen)
211 unsigned char buf[64];
215 /* Default return if we fail. */
220 fp = fopen(filename, "rb");
222 return 0; /* doesn't even exist */
225 * Read the first line of the file and see if it's a v1 private
228 if (fgets(buf, sizeof(buf), fp) && !strcmp(buf, rsa_signature)) {
229 memset(&key, 0, sizeof(key));
230 if (loadrsakey_main(fp, &key, TRUE, NULL, NULL)) {
231 *blob = rsa_public_blob(&key, bloblen);
241 * Save an RSA key file. Return nonzero on success.
243 int saversakey(char *filename, struct RSAKey *key, char *passphrase)
245 unsigned char buf[16384];
246 unsigned char keybuf[16];
247 struct MD5Context md5c;
248 unsigned char *p, *estart;
252 * Write the initial signature.
255 memcpy(p, rsa_signature, sizeof(rsa_signature));
256 p += sizeof(rsa_signature);
259 * One byte giving encryption type, and one reserved (zero)
262 *p++ = (passphrase ? SSH_CIPHER_3DES : 0);
267 * An ordinary SSH 1 public key consists of: a uint32
268 * containing the bit count, then two bignums containing the
269 * modulus and exponent respectively.
271 PUT_32BIT(p, bignum_bitcount(key->modulus));
273 p += ssh1_write_bignum(p, key->modulus);
274 p += ssh1_write_bignum(p, key->exponent);
277 * A string containing the comment field.
280 PUT_32BIT(p, strlen(key->comment));
282 memcpy(p, key->comment, strlen(key->comment));
283 p += strlen(key->comment);
290 * The encrypted portion starts here.
295 * Two bytes, then the same two bytes repeated.
297 *p++ = random_byte();
298 *p++ = random_byte();
304 * Four more bignums: the decryption exponent, then iqmp, then
307 p += ssh1_write_bignum(p, key->private_exponent);
308 p += ssh1_write_bignum(p, key->iqmp);
309 p += ssh1_write_bignum(p, key->q);
310 p += ssh1_write_bignum(p, key->p);
313 * Now write zeros until the encrypted portion is a multiple of
316 while ((p - estart) % 8)
320 * Now encrypt the encrypted portion.
324 MD5Update(&md5c, passphrase, strlen(passphrase));
325 MD5Final(keybuf, &md5c);
326 des3_encrypt_pubkey(keybuf, estart, p - estart);
327 memset(keybuf, 0, sizeof(keybuf)); /* burn the evidence */
331 * Done. Write the result to the file.
333 fp = fopen(filename, "wb");
335 int ret = (fwrite(buf, 1, p - buf, fp) == (size_t) (p - buf));
336 ret = ret && (fclose(fp) == 0);
342 /* ----------------------------------------------------------------------
343 * SSH2 private key load/store functions.
347 * PuTTY's own format for SSH2 keys is as follows:
349 * The file is text. Lines are terminated by CRLF, although CR-only
350 * and LF-only are tolerated on input.
352 * The first line says "PuTTY-User-Key-File-2: " plus the name of the
353 * algorithm ("ssh-dss", "ssh-rsa" etc).
355 * The next line says "Encryption: " plus an encryption type.
356 * Currently the only supported encryption types are "aes256-cbc"
359 * The next line says "Comment: " plus the comment string.
361 * Next there is a line saying "Public-Lines: " plus a number N.
362 * The following N lines contain a base64 encoding of the public
363 * part of the key. This is encoded as the standard SSH2 public key
364 * blob (with no initial length): so for RSA, for example, it will
371 * Next, there is a line saying "Private-Lines: " plus a number N,
372 * and then N lines containing the (potentially encrypted) private
373 * part of the key. For the key type "ssh-rsa", this will be
376 * mpint private_exponent
377 * mpint p (the larger of the two primes)
378 * mpint q (the smaller prime)
379 * mpint iqmp (the inverse of q modulo p)
380 * data padding (to reach a multiple of the cipher block size)
382 * And for "ssh-dss", it will be composed of
384 * mpint x (the private key parameter)
385 * [ string hash 20-byte hash of mpints p || q || g only in old format ]
387 * Finally, there is a line saying "Private-MAC: " plus a hex
388 * representation of a HMAC-SHA-1 of:
390 * string name of algorithm ("ssh-dss", "ssh-rsa")
391 * string encryption type
394 * string private-plaintext (the plaintext version of the
395 * private part, including the final
398 * The key to the MAC is itself a SHA-1 hash of:
400 * data "putty-private-key-file-mac-key"
403 * Encrypted keys should have a MAC, whereas unencrypted ones must
406 * If the key is encrypted, the encryption key is derived from the
407 * passphrase by means of a succession of SHA-1 hashes. Each hash
410 * uint32 sequence-number
413 * where the sequence-number increases from zero. As many of these
414 * hashes are used as necessary.
416 * For backwards compatibility with snapshots between 0.51 and
417 * 0.52, we also support the older key file format, which begins
418 * with "PuTTY-User-Key-File-1" (version number differs). In this
419 * format the Private-MAC: field only covers the private-plaintext
420 * field and nothing else (and without the 4-byte string length on
421 * the front too). Moreover, for RSA keys the Private-MAC: field
422 * can be replaced with a Private-Hash: field which is a plain
423 * SHA-1 hash instead of an HMAC. This is not allowable in DSA
424 * keys. (Yes, the old format was a mess. Guess why it changed :-)
427 static int read_header(FILE * fp, char *header)
434 if (c == '\n' || c == '\r' || c == EOF)
435 return 0; /* failure */
441 return 1; /* success! */
444 return 0; /* failure */
448 return 0; /* failure */
451 static char *read_body(FILE * fp)
459 text = smalloc(size);
465 if (c == '\r' || c == '\n') {
467 if (c != '\r' && c != '\n' && c != EOF)
475 if (len + 1 > size) {
477 text = srealloc(text, size);
484 int base64_decode_atom(char *atom, unsigned char *out)
491 for (i = 0; i < 4; i++) {
493 if (c >= 'A' && c <= 'Z')
495 else if (c >= 'a' && c <= 'z')
497 else if (c >= '0' && c <= '9')
506 return 0; /* invalid atom */
510 if (vals[0] == -1 || vals[1] == -1)
512 if (vals[2] == -1 && vals[3] != -1)
517 else if (vals[2] != -1)
522 word = ((vals[0] << 18) |
523 (vals[1] << 12) | ((vals[2] & 0x3F) << 6) | (vals[3] & 0x3F));
524 out[0] = (word >> 16) & 0xFF;
526 out[1] = (word >> 8) & 0xFF;
528 out[2] = word & 0xFF;
532 static char *read_blob(FILE * fp, int nlines, int *bloblen)
539 /* We expect at most 64 base64 characters, ie 48 real bytes, per line. */
540 blob = smalloc(48 * nlines);
542 for (i = 0; i < nlines; i++) {
543 line = read_body(fp);
548 linelen = strlen(line);
549 if (linelen % 4 != 0 || linelen > 64) {
554 for (j = 0; j < linelen; j += 4) {
555 k = base64_decode_atom(line + j, blob + len);
570 * Magic error return value for when the passphrase is wrong.
572 struct ssh2_userkey ssh2_wrong_passphrase = {
576 struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase)
579 char header[40], *b, *encryption, *comment, *mac;
580 const struct ssh_signkey *alg;
581 struct ssh2_userkey *ret;
582 int cipher, cipherblk;
583 unsigned char *public_blob, *private_blob;
584 int public_blob_len, private_blob_len;
585 int i, is_mac, old_fmt;
586 int passlen = passphrase ? strlen(passphrase) : 0;
588 ret = NULL; /* return NULL for most errors */
589 comment = mac = NULL;
590 public_blob = private_blob = NULL;
592 fp = fopen(filename, "rb");
596 /* Read the first header line which contains the key type. */
597 if (!read_header(fp, header))
599 if (0 == strcmp(header, "PuTTY-User-Key-File-2")) {
601 } else if (0 == strcmp(header, "PuTTY-User-Key-File-1")) {
602 /* this is an old key file; warn and then continue */
603 old_keyfile_warning();
607 if ((b = read_body(fp)) == NULL)
609 /* Select key algorithm structure. */
610 if (!strcmp(b, "ssh-rsa"))
612 else if (!strcmp(b, "ssh-dss"))
620 /* Read the Encryption header line. */
621 if (!read_header(fp, header) || 0 != strcmp(header, "Encryption"))
623 if ((encryption = read_body(fp)) == NULL)
625 if (!strcmp(encryption, "aes256-cbc")) {
628 } else if (!strcmp(encryption, "none")) {
636 /* Read the Comment header line. */
637 if (!read_header(fp, header) || 0 != strcmp(header, "Comment"))
639 if ((comment = read_body(fp)) == NULL)
642 /* Read the Public-Lines header line and the public blob. */
643 if (!read_header(fp, header) || 0 != strcmp(header, "Public-Lines"))
645 if ((b = read_body(fp)) == NULL)
649 if ((public_blob = read_blob(fp, i, &public_blob_len)) == NULL)
652 /* Read the Private-Lines header line and the Private blob. */
653 if (!read_header(fp, header) || 0 != strcmp(header, "Private-Lines"))
655 if ((b = read_body(fp)) == NULL)
659 if ((private_blob = read_blob(fp, i, &private_blob_len)) == NULL)
662 /* Read the Private-MAC or Private-Hash header line. */
663 if (!read_header(fp, header))
665 if (0 == strcmp(header, "Private-MAC")) {
666 if ((mac = read_body(fp)) == NULL)
669 } else if (0 == strcmp(header, "Private-Hash") &&
670 alg == &ssh_rsa && old_fmt) {
671 if ((mac = read_body(fp)) == NULL)
681 * Decrypt the private blob.
684 unsigned char key[40];
689 if (private_blob_len % cipherblk)
693 SHA_Bytes(&s, "\0\0\0\0", 4);
694 SHA_Bytes(&s, passphrase, passlen);
695 SHA_Final(&s, key + 0);
697 SHA_Bytes(&s, "\0\0\0\1", 4);
698 SHA_Bytes(&s, passphrase, passlen);
699 SHA_Final(&s, key + 20);
700 aes256_decrypt_pubkey(key, private_blob, private_blob_len);
708 unsigned char binary[20];
709 unsigned char *macdata;
714 /* MAC (or hash) only covers the private blob. */
715 macdata = private_blob;
716 maclen = private_blob_len;
720 int namelen = strlen(alg->name);
721 int enclen = strlen(encryption);
722 int commlen = strlen(comment);
723 maclen = (4 + namelen +
726 4 + public_blob_len +
727 4 + private_blob_len);
728 macdata = smalloc(maclen);
730 #define DO_STR(s,len) PUT_32BIT(p,(len));memcpy(p+4,(s),(len));p+=4+(len)
731 DO_STR(alg->name, namelen);
732 DO_STR(encryption, enclen);
733 DO_STR(comment, commlen);
734 DO_STR(public_blob, public_blob_len);
735 DO_STR(private_blob, private_blob_len);
742 unsigned char mackey[20];
743 char header[] = "putty-private-key-file-mac-key";
746 SHA_Bytes(&s, header, sizeof(header)-1);
748 SHA_Bytes(&s, passphrase, passlen);
749 SHA_Final(&s, mackey);
751 hmac_sha1_simple(mackey, 20, macdata, maclen, binary);
753 memset(mackey, 0, sizeof(mackey));
754 memset(&s, 0, sizeof(s));
756 SHA_Simple(macdata, maclen, binary);
760 memset(macdata, 0, maclen);
764 for (i = 0; i < 20; i++)
765 sprintf(realmac + 2 * i, "%02x", binary[i]);
767 if (strcmp(mac, realmac)) {
768 /* An incorrect MAC is an unconditional Error if the key is
769 * unencrypted. Otherwise, it means Wrong Passphrase. */
770 ret = cipher ? SSH2_WRONG_PASSPHRASE : NULL;
777 * Create and return the key.
779 ret = smalloc(sizeof(struct ssh2_userkey));
781 ret->comment = comment;
782 ret->data = alg->createkey(public_blob, public_blob_len,
783 private_blob, private_blob_len);
813 char *ssh2_userkey_loadpub(char *filename, char **algorithm,
818 const struct ssh_signkey *alg;
819 unsigned char *public_blob;
825 fp = fopen(filename, "rb");
829 /* Read the first header line which contains the key type. */
830 if (!read_header(fp, header)
831 || (0 != strcmp(header, "PuTTY-User-Key-File-2") &&
832 0 != strcmp(header, "PuTTY-User-Key-File-1")))
834 if ((b = read_body(fp)) == NULL)
836 /* Select key algorithm structure. Currently only ssh-rsa. */
837 if (!strcmp(b, "ssh-rsa"))
839 else if (!strcmp(b, "ssh-dss"))
847 /* Read the Encryption header line. */
848 if (!read_header(fp, header) || 0 != strcmp(header, "Encryption"))
850 if ((b = read_body(fp)) == NULL)
852 sfree(b); /* we don't care */
854 /* Read the Comment header line. */
855 if (!read_header(fp, header) || 0 != strcmp(header, "Comment"))
857 if ((b = read_body(fp)) == NULL)
859 sfree(b); /* we don't care */
861 /* Read the Public-Lines header line and the public blob. */
862 if (!read_header(fp, header) || 0 != strcmp(header, "Public-Lines"))
864 if ((b = read_body(fp)) == NULL)
868 if ((public_blob = read_blob(fp, i, &public_blob_len)) == NULL)
873 *pub_blob_len = public_blob_len;
875 *algorithm = alg->name;
889 int ssh2_userkey_encrypted(char *filename, char **commentptr)
892 char header[40], *b, *comment;
898 fp = fopen(filename, "rb");
901 if (!read_header(fp, header)
902 || (0 != strcmp(header, "PuTTY-User-Key-File-2") &&
903 0 != strcmp(header, "PuTTY-User-Key-File-1"))) {
907 if ((b = read_body(fp)) == NULL) {
911 sfree(b); /* we don't care about key type here */
912 /* Read the Encryption header line. */
913 if (!read_header(fp, header) || 0 != strcmp(header, "Encryption")) {
917 if ((b = read_body(fp)) == NULL) {
922 /* Read the Comment header line. */
923 if (!read_header(fp, header) || 0 != strcmp(header, "Comment")) {
928 if ((comment = read_body(fp)) == NULL) {
935 *commentptr = comment;
938 if (!strcmp(b, "aes256-cbc"))
946 int base64_lines(int datalen)
948 /* When encoding, we use 64 chars/line, which equals 48 real chars. */
949 return (datalen + 47) / 48;
952 void base64_encode(FILE * fp, unsigned char *data, int datalen, int cpl)
958 while (datalen > 0) {
959 n = (datalen < 3 ? datalen : 3);
960 base64_encode_atom(data, n, out);
963 for (i = 0; i < 4; i++) {
964 if (linelen >= cpl) {
975 int ssh2_save_userkey(char *filename, struct ssh2_userkey *key,
979 unsigned char *pub_blob, *priv_blob, *priv_blob_encrypted;
980 int pub_blob_len, priv_blob_len, priv_encrypted_len;
985 unsigned char priv_mac[20];
988 * Fetch the key component blobs.
990 pub_blob = key->alg->public_blob(key->data, &pub_blob_len);
991 priv_blob = key->alg->private_blob(key->data, &priv_blob_len);
992 if (!pub_blob || !priv_blob) {
999 * Determine encryption details, and encrypt the private blob.
1002 cipherstr = "aes256-cbc";
1008 priv_encrypted_len = priv_blob_len + cipherblk - 1;
1009 priv_encrypted_len -= priv_encrypted_len % cipherblk;
1010 priv_blob_encrypted = smalloc(priv_encrypted_len);
1011 memset(priv_blob_encrypted, 0, priv_encrypted_len);
1012 memcpy(priv_blob_encrypted, priv_blob, priv_blob_len);
1013 /* Create padding based on the SHA hash of the unpadded blob. This prevents
1014 * too easy a known-plaintext attack on the last block. */
1015 SHA_Simple(priv_blob, priv_blob_len, priv_mac);
1016 assert(priv_encrypted_len - priv_blob_len < 20);
1017 memcpy(priv_blob_encrypted + priv_blob_len, priv_mac,
1018 priv_encrypted_len - priv_blob_len);
1020 /* Now create the MAC. */
1022 unsigned char *macdata;
1025 int namelen = strlen(key->alg->name);
1026 int enclen = strlen(cipherstr);
1027 int commlen = strlen(key->comment);
1029 unsigned char mackey[20];
1030 char header[] = "putty-private-key-file-mac-key";
1032 maclen = (4 + namelen +
1036 4 + priv_encrypted_len);
1037 macdata = smalloc(maclen);
1039 #define DO_STR(s,len) PUT_32BIT(p,(len));memcpy(p+4,(s),(len));p+=4+(len)
1040 DO_STR(key->alg->name, namelen);
1041 DO_STR(cipherstr, enclen);
1042 DO_STR(key->comment, commlen);
1043 DO_STR(pub_blob, pub_blob_len);
1044 DO_STR(priv_blob_encrypted, priv_encrypted_len);
1047 SHA_Bytes(&s, header, sizeof(header)-1);
1049 SHA_Bytes(&s, passphrase, strlen(passphrase));
1050 SHA_Final(&s, mackey);
1051 hmac_sha1_simple(mackey, 20, macdata, maclen, priv_mac);
1052 memset(macdata, 0, maclen);
1054 memset(mackey, 0, sizeof(mackey));
1055 memset(&s, 0, sizeof(s));
1062 passlen = strlen(passphrase);
1065 SHA_Bytes(&s, "\0\0\0\0", 4);
1066 SHA_Bytes(&s, passphrase, passlen);
1067 SHA_Final(&s, key + 0);
1069 SHA_Bytes(&s, "\0\0\0\1", 4);
1070 SHA_Bytes(&s, passphrase, passlen);
1071 SHA_Final(&s, key + 20);
1072 aes256_encrypt_pubkey(key, priv_blob_encrypted,
1073 priv_encrypted_len);
1075 memset(key, 0, sizeof(key));
1076 memset(&s, 0, sizeof(s));
1079 fp = fopen(filename, "w");
1082 fprintf(fp, "PuTTY-User-Key-File-2: %s\n", key->alg->name);
1083 fprintf(fp, "Encryption: %s\n", cipherstr);
1084 fprintf(fp, "Comment: %s\n", key->comment);
1085 fprintf(fp, "Public-Lines: %d\n", base64_lines(pub_blob_len));
1086 base64_encode(fp, pub_blob, pub_blob_len, 64);
1087 fprintf(fp, "Private-Lines: %d\n", base64_lines(priv_encrypted_len));
1088 base64_encode(fp, priv_blob_encrypted, priv_encrypted_len, 64);
1089 fprintf(fp, "Private-MAC: ");
1090 for (i = 0; i < 20; i++)
1091 fprintf(fp, "%02x", priv_mac[i]);
1096 memset(priv_blob, 0, priv_blob_len);
1098 sfree(priv_blob_encrypted);
1102 /* ----------------------------------------------------------------------
1103 * A function to determine the type of a private key file. Returns
1104 * 0 on failure, 1 or 2 on success.
1106 int key_type(char *filename)
1110 const char putty2_sig[] = "PuTTY-User-Key-File-";
1111 const char sshcom_sig[] = "---- BEGIN SSH2 ENCRYPTED PRIVAT";
1112 const char openssh_sig[] = "-----BEGIN ";
1115 fp = fopen(filename, "r");
1117 return SSH_KEYTYPE_UNOPENABLE;
1118 i = fread(buf, 1, sizeof(buf), fp);
1121 return SSH_KEYTYPE_UNOPENABLE;
1123 return SSH_KEYTYPE_UNKNOWN;
1124 if (!memcmp(buf, rsa_signature, sizeof(rsa_signature)-1))
1125 return SSH_KEYTYPE_SSH1;
1126 if (!memcmp(buf, putty2_sig, sizeof(putty2_sig)-1))
1127 return SSH_KEYTYPE_SSH2;
1128 if (!memcmp(buf, openssh_sig, sizeof(openssh_sig)-1))
1129 return SSH_KEYTYPE_OPENSSH;
1130 if (!memcmp(buf, sshcom_sig, sizeof(sshcom_sig)-1))
1131 return SSH_KEYTYPE_SSHCOM;
1132 return SSH_KEYTYPE_UNKNOWN; /* unrecognised or EOF */
1136 * Convert the type word to a string, for `wrong type' error
1139 char *key_type_to_str(int type)
1142 case SSH_KEYTYPE_UNOPENABLE: return "unable to open file"; break;
1143 case SSH_KEYTYPE_UNKNOWN: return "not a private key"; break;
1144 case SSH_KEYTYPE_SSH1: return "SSH1 private key"; break;
1145 case SSH_KEYTYPE_SSH2: return "PuTTY SSH2 private key"; break;
1146 case SSH_KEYTYPE_OPENSSH: return "OpenSSH SSH2 private key"; break;
1147 case SSH_KEYTYPE_SSHCOM: return "ssh.com SSH2 private key"; break;
1148 default: return "INTERNAL ERROR"; break;