-/* no encryption */
-static void
-none_setkey(CipherContext *cc, const u_char *key, u_int keylen)
-{
-}
-static void
-none_setiv(CipherContext *cc, const u_char *iv, u_int ivlen)
-{
-}
-static void
-none_crypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
-{
- memcpy(dest, src, len);
-}
-
-/* DES */
-static void
-des_ssh1_setkey(CipherContext *cc, const u_char *key, u_int keylen)
-{
- static int dowarn = 1;
- if (dowarn) {
- error("Warning: use of DES is strongly discouraged "
- "due to cryptographic weaknesses");
- dowarn = 0;
- }
- des_set_key((void *)key, cc->u.des.key);
-}
-static void
-des_ssh1_setiv(CipherContext *cc, const u_char *iv, u_int ivlen)
-{
- memset(cc->u.des.iv, 0, sizeof(cc->u.des.iv));
-}
-static void
-des_ssh1_encrypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
-{
- des_ncbc_encrypt(src, dest, len, cc->u.des.key, &cc->u.des.iv,
- DES_ENCRYPT);
-}
-static void
-des_ssh1_decrypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
-{
- des_ncbc_encrypt(src, dest, len, cc->u.des.key, &cc->u.des.iv,
- DES_DECRYPT);
-}
-
-/* 3DES */
-static void
-des3_setkey(CipherContext *cc, const u_char *key, u_int keylen)
-{
- des_set_key((void *) key, cc->u.des3.key1);
- des_set_key((void *) (key+8), cc->u.des3.key2);
- des_set_key((void *) (key+16), cc->u.des3.key3);
-}
-static void
-des3_setiv(CipherContext *cc, const u_char *iv, u_int ivlen)
-{
- memset(cc->u.des3.iv1, 0, sizeof(cc->u.des3.iv1));
- memset(cc->u.des3.iv2, 0, sizeof(cc->u.des3.iv2));
- memset(cc->u.des3.iv3, 0, sizeof(cc->u.des3.iv3));
- if (iv == NULL)
- return;
- memcpy(cc->u.des3.iv3, (char *)iv, 8);
-}
-static void
-des3_cbc_encrypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
-{
- des_ede3_cbc_encrypt(src, dest, len,
- cc->u.des3.key1, cc->u.des3.key2, cc->u.des3.key3,
- &cc->u.des3.iv3, DES_ENCRYPT);
-}
-static void
-des3_cbc_decrypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
-{
- des_ede3_cbc_encrypt(src, dest, len,
- cc->u.des3.key1, cc->u.des3.key2, cc->u.des3.key3,
- &cc->u.des3.iv3, DES_DECRYPT);
-}
-
-/*
- * This is used by SSH1:
- *
- * What kind of triple DES are these 2 routines?
- *
- * Why is there a redundant initialization vector?
- *
- * If only iv3 was used, then, this would till effect have been
- * outer-cbc. However, there is also a private iv1 == iv2 which
- * perhaps makes differential analysis easier. On the other hand, the
- * private iv1 probably makes the CRC-32 attack ineffective. This is a
- * result of that there is no longer any known iv1 to use when
- * choosing the X block.
- */
-static void
-des3_ssh1_setkey(CipherContext *cc, const u_char *key, u_int keylen)
-{
- des_set_key((void *) key, cc->u.des3.key1);
- des_set_key((void *) (key+8), cc->u.des3.key2);
- if (keylen <= 16)
- des_set_key((void *) key, cc->u.des3.key3);
- else
- des_set_key((void *) (key+16), cc->u.des3.key3);
-}
-static void
-des3_ssh1_encrypt(CipherContext *cc, u_char *dest, const u_char *src,
- u_int len)
-{
- des_ncbc_encrypt(src, dest, len, cc->u.des3.key1, &cc->u.des3.iv1,
- DES_ENCRYPT);
- des_ncbc_encrypt(dest, dest, len, cc->u.des3.key2, &cc->u.des3.iv2,
- DES_DECRYPT);
- des_ncbc_encrypt(dest, dest, len, cc->u.des3.key3, &cc->u.des3.iv3,
- DES_ENCRYPT);
-}
-static void
-des3_ssh1_decrypt(CipherContext *cc, u_char *dest, const u_char *src,
- u_int len)
-{
- des_ncbc_encrypt(src, dest, len, cc->u.des3.key3, &cc->u.des3.iv3,
- DES_DECRYPT);
- des_ncbc_encrypt(dest, dest, len, cc->u.des3.key2, &cc->u.des3.iv2,
- DES_ENCRYPT);
- des_ncbc_encrypt(dest, dest, len, cc->u.des3.key1, &cc->u.des3.iv1,
- DES_DECRYPT);
-}
-
-/* Blowfish */
-static void
-blowfish_setkey(CipherContext *cc, const u_char *key, u_int keylen)
-{
- BF_set_key(&cc->u.bf.key, keylen, (u_char *)key);
-}
-static void
-blowfish_setiv(CipherContext *cc, const u_char *iv, u_int ivlen)
-{
- if (iv == NULL)
- memset(cc->u.bf.iv, 0, 8);
- else
- memcpy(cc->u.bf.iv, (char *)iv, 8);
-}
-static void
-blowfish_cbc_encrypt(CipherContext *cc, u_char *dest, const u_char *src,
- u_int len)
-{
- BF_cbc_encrypt((void *)src, dest, len, &cc->u.bf.key, cc->u.bf.iv,
- BF_ENCRYPT);
-}
-static void
-blowfish_cbc_decrypt(CipherContext *cc, u_char *dest, const u_char *src,
- u_int len)
-{
- BF_cbc_encrypt((void *)src, dest, len, &cc->u.bf.key, cc->u.bf.iv,
- BF_DECRYPT);
-}
-
-/*
- * SSH1 uses a variation on Blowfish, all bytes must be swapped before
- * and after encryption/decryption. Thus the swap_bytes stuff (yuk).
- */
-static void
-swap_bytes(const u_char *src, u_char *dst, int n)
-{
- char c[4];
-
- /* Process 4 bytes every lap. */
- for (n = n / 4; n > 0; n--) {
- c[3] = *src++;
- c[2] = *src++;
- c[1] = *src++;
- c[0] = *src++;
-
- *dst++ = c[0];
- *dst++ = c[1];
- *dst++ = c[2];
- *dst++ = c[3];
- }
-}
+#if OPENSSL_VERSION_NUMBER < 0x00906000L
+#define SSH_OLD_EVP
+#define EVP_CIPHER_CTX_get_app_data(e) ((e)->app_data)
+#endif
+
+#if OPENSSL_VERSION_NUMBER < 0x00907000L
+extern const EVP_CIPHER *evp_rijndael(void);
+extern void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
+#endif
+
+#if !defined(EVP_CTRL_SET_ACSS_MODE)
+# if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
+extern const EVP_CIPHER *evp_acss(void);
+# define EVP_acss evp_acss
+# define EVP_CTRL_SET_ACSS_MODE xxx /* used below */
+# else
+# define EVP_acss NULL /* Don't try to support ACSS on older OpenSSL */
+# endif /* (OPENSSL_VERSION_NUMBER >= 0x00906000L) */
+#endif /* !defined(EVP_CTRL_SET_ACSS_MODE) */
+
+extern const EVP_CIPHER *evp_ssh1_bf(void);
+extern const EVP_CIPHER *evp_ssh1_3des(void);
+extern void ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int);
+extern const EVP_CIPHER *evp_aes_128_ctr(void);
+extern void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
+
+struct Cipher {
+ char *name;
+ int number; /* for ssh1 only */
+ u_int block_size;
+ u_int key_len;
+ const EVP_CIPHER *(*evptype)(void);
+} ciphers[] = {
+ { "none", SSH_CIPHER_NONE, 8, 0, EVP_enc_null },
+ { "des", SSH_CIPHER_DES, 8, 8, EVP_des_cbc },
+ { "3des", SSH_CIPHER_3DES, 8, 16, evp_ssh1_3des },
+ { "blowfish", SSH_CIPHER_BLOWFISH, 8, 32, evp_ssh1_bf },
+
+ { "3des-cbc", SSH_CIPHER_SSH2, 8, 24, EVP_des_ede3_cbc },
+ { "blowfish-cbc", SSH_CIPHER_SSH2, 8, 16, EVP_bf_cbc },
+ { "cast128-cbc", SSH_CIPHER_SSH2, 8, 16, EVP_cast5_cbc },
+ { "arcfour", SSH_CIPHER_SSH2, 8, 16, EVP_rc4 },
+#if OPENSSL_VERSION_NUMBER < 0x00907000L
+ { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, evp_rijndael },
+ { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, evp_rijndael },
+ { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, evp_rijndael },
+ { "rijndael-cbc@lysator.liu.se",
+ SSH_CIPHER_SSH2, 16, 32, evp_rijndael },
+#else
+ { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, EVP_aes_128_cbc },
+ { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, EVP_aes_192_cbc },
+ { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, EVP_aes_256_cbc },
+ { "rijndael-cbc@lysator.liu.se",
+ SSH_CIPHER_SSH2, 16, 32, EVP_aes_256_cbc },
+#endif
+#if OPENSSL_VERSION_NUMBER >= 0x00905000L
+ { "aes128-ctr", SSH_CIPHER_SSH2, 16, 16, evp_aes_128_ctr },
+ { "aes192-ctr", SSH_CIPHER_SSH2, 16, 24, evp_aes_128_ctr },
+ { "aes256-ctr", SSH_CIPHER_SSH2, 16, 32, evp_aes_128_ctr },
+#endif
+#if defined(EVP_CTRL_SET_ACSS_MODE)
+ { "acss@openssh.org", SSH_CIPHER_SSH2, 16, 5, EVP_acss },
+#endif
+ { NULL, SSH_CIPHER_ILLEGAL, 0, 0, NULL }
+};