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authorAris Adamantiadis <aris@0xbadc0de.be>2010-05-14 01:22:22 +0200
committerAris Adamantiadis <aris@0xbadc0de.be>2010-05-14 01:22:22 +0200
commit2234c115f25ccf606d28981711bc75871fbd2505 (patch)
treef8ecf0d195070ebe06f2b5a553941230c65cfdcb /libssh/libgcrypt.c
parentb23b3f1d9951df3ea7cc074de40db04bdf0d3a1c (diff)
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Separation work between openssl and libgcrypt
Diffstat (limited to 'libssh/libgcrypt.c')
-rw-r--r--libssh/libgcrypt.c423
1 files changed, 423 insertions, 0 deletions
diff --git a/libssh/libgcrypt.c b/libssh/libgcrypt.c
new file mode 100644
index 0000000..f8fe96f
--- /dev/null
+++ b/libssh/libgcrypt.c
@@ -0,0 +1,423 @@
+/*
+ * This file is part of the SSH Library
+ *
+ * Copyright (c) 2009 by Aris Adamantiadis
+ *
+ * The SSH Library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ *
+ * The SSH Library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the SSH Library; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "libssh/priv.h"
+#include "libssh/session.h"
+#include "libssh/crypto.h"
+#include "libssh/wrapper.h"
+
+#ifdef HAVE_LIBGCRYPT
+#include <gcrypt.h>
+
+
+static int alloc_key(struct crypto_struct *cipher) {
+ cipher->key = malloc(cipher->keylen);
+ if (cipher->key == NULL) {
+ return -1;
+ }
+
+ return 0;
+}
+
+SHACTX sha1_init(void) {
+ SHACTX ctx = NULL;
+ gcry_md_open(&ctx, GCRY_MD_SHA1, 0);
+
+ return ctx;
+}
+
+void sha1_update(SHACTX c, const void *data, unsigned long len) {
+ gcry_md_write(c, data, len);
+}
+
+void sha1_final(unsigned char *md, SHACTX c) {
+ gcry_md_final(c);
+ memcpy(md, gcry_md_read(c, 0), SHA_DIGEST_LEN);
+ gcry_md_close(c);
+}
+
+void sha1(unsigned char *digest, int len, unsigned char *hash) {
+ gcry_md_hash_buffer(GCRY_MD_SHA1, hash, digest, len);
+}
+
+MD5CTX md5_init(void) {
+ MD5CTX c = NULL;
+ gcry_md_open(&c, GCRY_MD_MD5, 0);
+
+ return c;
+}
+
+void md5_update(MD5CTX c, const void *data, unsigned long len) {
+ gcry_md_write(c,data,len);
+}
+
+void md5_final(unsigned char *md, MD5CTX c) {
+ gcry_md_final(c);
+ memcpy(md, gcry_md_read(c, 0), MD5_DIGEST_LEN);
+ gcry_md_close(c);
+}
+
+HMACCTX hmac_init(const void *key, int len, int type) {
+ HMACCTX c = NULL;
+
+ switch(type) {
+ case HMAC_SHA1:
+ gcry_md_open(&c, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC);
+ break;
+ case HMAC_MD5:
+ gcry_md_open(&c, GCRY_MD_MD5, GCRY_MD_FLAG_HMAC);
+ break;
+ default:
+ c = NULL;
+ }
+
+ gcry_md_setkey(c, key, len);
+
+ return c;
+}
+
+void hmac_update(HMACCTX c, const void *data, unsigned long len) {
+ gcry_md_write(c, data, len);
+}
+
+void hmac_final(HMACCTX c, unsigned char *hashmacbuf, unsigned int *len) {
+ *len = gcry_md_get_algo_dlen(gcry_md_get_algo(c));
+ memcpy(hashmacbuf, gcry_md_read(c, 0), *len);
+ gcry_md_close(c);
+}
+
+/* the wrapper functions for blowfish */
+static int blowfish_set_key(struct crypto_struct *cipher, void *key, void *IV){
+ if (cipher->key == NULL) {
+ if (alloc_key(cipher) < 0) {
+ return -1;
+ }
+
+ if (gcry_cipher_open(&cipher->key[0], GCRY_CIPHER_BLOWFISH,
+ GCRY_CIPHER_MODE_CBC, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setkey(cipher->key[0], key, 16)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setiv(cipher->key[0], IV, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void blowfish_encrypt(struct crypto_struct *cipher, void *in,
+ void *out, unsigned long len) {
+ gcry_cipher_encrypt(cipher->key[0], out, len, in, len);
+}
+
+static void blowfish_decrypt(struct crypto_struct *cipher, void *in,
+ void *out, unsigned long len) {
+ gcry_cipher_decrypt(cipher->key[0], out, len, in, len);
+}
+
+static int aes_set_key(struct crypto_struct *cipher, void *key, void *IV) {
+ int mode=GCRY_CIPHER_MODE_CBC;
+ if (cipher->key == NULL) {
+ if (alloc_key(cipher) < 0) {
+ return -1;
+ }
+ if(strstr(cipher->name,"-ctr"))
+ mode=GCRY_CIPHER_MODE_CTR;
+ switch (cipher->keysize) {
+ case 128:
+ if (gcry_cipher_open(&cipher->key[0], GCRY_CIPHER_AES128,
+ mode, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ break;
+ case 192:
+ if (gcry_cipher_open(&cipher->key[0], GCRY_CIPHER_AES192,
+ mode, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ break;
+ case 256:
+ if (gcry_cipher_open(&cipher->key[0], GCRY_CIPHER_AES256,
+ mode, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ break;
+ }
+ if (gcry_cipher_setkey(cipher->key[0], key, cipher->keysize / 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if(mode == GCRY_CIPHER_MODE_CBC){
+ if (gcry_cipher_setiv(cipher->key[0], IV, 16)) {
+
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ } else {
+ if(gcry_cipher_setctr(cipher->key[0],IV,16)){
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void aes_encrypt(struct crypto_struct *cipher, void *in, void *out,
+ unsigned long len) {
+ gcry_cipher_encrypt(cipher->key[0], out, len, in, len);
+}
+
+static void aes_decrypt(struct crypto_struct *cipher, void *in, void *out,
+ unsigned long len) {
+ gcry_cipher_decrypt(cipher->key[0], out, len, in, len);
+}
+
+static int des3_set_key(struct crypto_struct *cipher, void *key, void *IV) {
+ if (cipher->key == NULL) {
+ if (alloc_key(cipher) < 0) {
+ return -1;
+ }
+ if (gcry_cipher_open(&cipher->key[0], GCRY_CIPHER_3DES,
+ GCRY_CIPHER_MODE_CBC, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setkey(cipher->key[0], key, 24)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setiv(cipher->key[0], IV, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void des3_encrypt(struct crypto_struct *cipher, void *in,
+ void *out, unsigned long len) {
+ gcry_cipher_encrypt(cipher->key[0], out, len, in, len);
+}
+
+static void des3_decrypt(struct crypto_struct *cipher, void *in,
+ void *out, unsigned long len) {
+ gcry_cipher_decrypt(cipher->key[0], out, len, in, len);
+}
+
+static int des3_1_set_key(struct crypto_struct *cipher, void *key, void *IV) {
+ if (cipher->key == NULL) {
+ if (alloc_key(cipher) < 0) {
+ return -1;
+ }
+ if (gcry_cipher_open(&cipher->key[0], GCRY_CIPHER_DES,
+ GCRY_CIPHER_MODE_CBC, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setkey(cipher->key[0], key, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setiv(cipher->key[0], IV, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+
+ if (gcry_cipher_open(&cipher->key[1], GCRY_CIPHER_DES,
+ GCRY_CIPHER_MODE_CBC, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setkey(cipher->key[1], (unsigned char *)key + 8, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setiv(cipher->key[1], (unsigned char *)IV + 8, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+
+ if (gcry_cipher_open(&cipher->key[2], GCRY_CIPHER_DES,
+ GCRY_CIPHER_MODE_CBC, 0)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setkey(cipher->key[2], (unsigned char *)key + 16, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ if (gcry_cipher_setiv(cipher->key[2], (unsigned char *)IV + 16, 8)) {
+ SAFE_FREE(cipher->key);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void des3_1_encrypt(struct crypto_struct *cipher, void *in,
+ void *out, unsigned long len) {
+ gcry_cipher_encrypt(cipher->key[0], out, len, in, len);
+ gcry_cipher_decrypt(cipher->key[1], in, len, out, len);
+ gcry_cipher_encrypt(cipher->key[2], out, len, in, len);
+}
+
+static void des3_1_decrypt(struct crypto_struct *cipher, void *in,
+ void *out, unsigned long len) {
+ gcry_cipher_decrypt(cipher->key[2], out, len, in, len);
+ gcry_cipher_encrypt(cipher->key[1], in, len, out, len);
+ gcry_cipher_decrypt(cipher->key[0], out, len, in, len);
+}
+
+/* the table of supported ciphers */
+static struct crypto_struct ssh_ciphertab[] = {
+ {
+ .name = "blowfish-cbc",
+ .blocksize = 8,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 128,
+ .set_encrypt_key = blowfish_set_key,
+ .set_decrypt_key = blowfish_set_key,
+ .cbc_encrypt = blowfish_encrypt,
+ .cbc_decrypt = blowfish_decrypt
+ },
+ {
+ .name = "aes128-ctr",
+ .blocksize = 16,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 128,
+ .set_encrypt_key = aes_set_key,
+ .set_decrypt_key = aes_set_key,
+ .cbc_encrypt = aes_encrypt,
+ .cbc_decrypt = aes_encrypt
+ },
+ {
+ .name = "aes192-ctr",
+ .blocksize = 16,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 192,
+ .set_encrypt_key = aes_set_key,
+ .set_decrypt_key = aes_set_key,
+ .cbc_encrypt = aes_encrypt,
+ .cbc_decrypt = aes_encrypt
+ },
+ {
+ .name = "aes256-ctr",
+ .blocksize = 16,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 256,
+ .set_encrypt_key = aes_set_key,
+ .set_decrypt_key = aes_set_key,
+ .cbc_encrypt = aes_encrypt,
+ .cbc_decrypt = aes_encrypt
+ },
+ {
+ .name = "aes128-cbc",
+ .blocksize = 16,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 128,
+ .set_encrypt_key = aes_set_key,
+ .set_decrypt_key = aes_set_key,
+ .cbc_encrypt = aes_encrypt,
+ .cbc_decrypt = aes_decrypt
+ },
+ {
+ .name = "aes192-cbc",
+ .blocksize = 16,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 192,
+ .set_encrypt_key = aes_set_key,
+ .set_decrypt_key = aes_set_key,
+ .cbc_encrypt = aes_encrypt,
+ .cbc_decrypt = aes_decrypt
+ },
+ {
+ .name = "aes256-cbc",
+ .blocksize = 16,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 256,
+ .set_encrypt_key = aes_set_key,
+ .set_decrypt_key = aes_set_key,
+ .cbc_encrypt = aes_encrypt,
+ .cbc_decrypt = aes_decrypt
+ },
+ {
+ .name = "3des-cbc",
+ .blocksize = 8,
+ .keylen = sizeof(gcry_cipher_hd_t),
+ .key = NULL,
+ .keysize = 192,
+ .set_encrypt_key = des3_set_key,
+ .set_decrypt_key = des3_set_key,
+ .cbc_encrypt = des3_encrypt,
+ .cbc_decrypt = des3_decrypt
+ },
+ {
+ .name = "3des-cbc-ssh1",
+ .blocksize = 8,
+ .keylen = sizeof(gcry_cipher_hd_t) * 3,
+ .key = NULL,
+ .keysize = 192,
+ .set_encrypt_key = des3_1_set_key,
+ .set_decrypt_key = des3_1_set_key,
+ .cbc_encrypt = des3_1_encrypt,
+ .cbc_decrypt = des3_1_decrypt
+ },
+ {
+ .name = NULL,
+ .blocksize = 0,
+ .keylen = 0,
+ .key = NULL,
+ .keysize = 0,
+ .set_encrypt_key = NULL,
+ .set_decrypt_key = NULL,
+ .cbc_encrypt = NULL,
+ .cbc_decrypt = NULL
+ }
+};
+
+struct crypto_struct *ssh_get_ciphertab(){
+ return ssh_ciphertab;
+}
+#endif