--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/headers/tomcrypt_cipher.h	Fri May 06 13:23:02 2005 +0000
@@ -0,0 +1,619 @@
+/* ---- SYMMETRIC KEY STUFF -----
+ *
+ * We put each of the ciphers scheduled keys in their own structs then we put all of 
+ * the key formats in one union.  This makes the function prototypes easier to use.
+ */
+#ifdef BLOWFISH
+struct blowfish_key {
+   ulong32 S[4][256];
+   ulong32 K[18];
+};
+#endif
+
+#ifdef RC5
+struct rc5_key {
+   int rounds;
+   ulong32 K[50];
+};
+#endif
+
+#ifdef RC6
+struct rc6_key {
+   ulong32 K[44];
+};
+#endif
+
+#ifdef SAFERP
+struct saferp_key {
+   unsigned char K[33][16];
+   long rounds;
+};
+#endif
+
+#ifdef RIJNDAEL
+struct rijndael_key {
+   ulong32 eK[64], dK[64];
+   int Nr;
+};
+#endif
+
+#ifdef XTEA
+struct xtea_key {
+   unsigned long A[32], B[32];
+};
+#endif
+
+#ifdef TWOFISH
+#ifndef TWOFISH_SMALL
+   struct twofish_key {
+      ulong32 S[4][256], K[40];
+   };
+#else
+   struct twofish_key {
+      ulong32 K[40];
+      unsigned char S[32], start;
+   };
+#endif
+#endif
+
+#ifdef SAFER
+#define SAFER_K64_DEFAULT_NOF_ROUNDS     6
+#define SAFER_K128_DEFAULT_NOF_ROUNDS   10
+#define SAFER_SK64_DEFAULT_NOF_ROUNDS    8
+#define SAFER_SK128_DEFAULT_NOF_ROUNDS  10
+#define SAFER_MAX_NOF_ROUNDS            13
+#define SAFER_BLOCK_LEN                  8
+#define SAFER_KEY_LEN     (1 + SAFER_BLOCK_LEN * (1 + 2 * SAFER_MAX_NOF_ROUNDS))
+typedef unsigned char safer_block_t[SAFER_BLOCK_LEN];
+typedef unsigned char safer_key_t[SAFER_KEY_LEN];
+struct safer_key { safer_key_t key; };
+#endif
+
+#ifdef RC2
+struct rc2_key { unsigned xkey[64]; };
+#endif
+
+#ifdef DES
+struct des_key {
+    ulong32 ek[32], dk[32];
+};
+
+struct des3_key {
+    ulong32 ek[3][32], dk[3][32];
+};
+#endif
+
+#ifdef CAST5
+struct cast5_key {
+    ulong32 K[32], keylen;
+};
+#endif
+
+#ifdef NOEKEON
+struct noekeon_key {
+    ulong32 K[4], dK[4];
+};
+#endif
+
+#ifdef SKIPJACK 
+struct skipjack_key {
+    unsigned char key[10];
+};
+#endif
+
+#ifdef KHAZAD
+struct khazad_key {
+   ulong64 roundKeyEnc[8 + 1]; 
+   ulong64 roundKeyDec[8 + 1]; 
+};
+#endif
+
+#ifdef ANUBIS
+struct anubis_key { 
+   int keyBits; 
+   int R; 
+   ulong32 roundKeyEnc[18 + 1][4]; 
+   ulong32 roundKeyDec[18 + 1][4]; 
+}; 
+#endif
+
+typedef union Symmetric_key {
+#ifdef DES
+   struct des_key des;
+   struct des3_key des3;
+#endif
+#ifdef RC2
+   struct rc2_key rc2;
+#endif
+#ifdef SAFER
+   struct safer_key safer;
+#endif
+#ifdef TWOFISH
+   struct twofish_key  twofish;
+#endif
+#ifdef BLOWFISH
+   struct blowfish_key blowfish;
+#endif
+#ifdef RC5
+   struct rc5_key      rc5;
+#endif
+#ifdef RC6
+   struct rc6_key      rc6;
+#endif
+#ifdef SAFERP
+   struct saferp_key   saferp;
+#endif
+#ifdef RIJNDAEL
+   struct rijndael_key rijndael;
+#endif
+#ifdef XTEA
+   struct xtea_key     xtea;
+#endif
+#ifdef CAST5
+   struct cast5_key    cast5;
+#endif
+#ifdef NOEKEON
+   struct noekeon_key  noekeon;
+#endif   
+#ifdef SKIPJACK
+   struct skipjack_key skipjack;
+#endif
+#ifdef KHAZAD
+   struct khazad_key   khazad;
+#endif
+#ifdef ANUBIS
+   struct anubis_key   anubis;
+#endif
+   void   *data;
+} symmetric_key;
+
+/* A block cipher ECB structure */
+typedef struct {
+   /** The index of the cipher chosen */
+   int                 cipher, 
+   /** The block size of the given cipher */
+                       blocklen;
+   /** The scheduled key */                       
+   symmetric_key       key;
+} symmetric_ECB;
+
+/* A block cipher CFB structure */
+typedef struct {
+   /** The index of the cipher chosen */
+   int                 cipher, 
+   /** The block size of the given cipher */                        
+                       blocklen, 
+   /** The padding offset */
+                       padlen;
+   /** The current IV */
+   unsigned char       IV[MAXBLOCKSIZE], 
+   /** The pad used to encrypt/decrypt */ 
+                       pad[MAXBLOCKSIZE];
+   /** The scheduled key */
+   symmetric_key       key;
+} symmetric_CFB;
+
+/* A block cipher OFB structure */
+typedef struct {
+   /** The index of the cipher chosen */
+   int                 cipher, 
+   /** The block size of the given cipher */                        
+                       blocklen, 
+   /** The padding offset */
+                       padlen;
+   /** The current IV */
+   unsigned char       IV[MAXBLOCKSIZE];
+   /** The scheduled key */
+   symmetric_key       key;
+} symmetric_OFB;
+
+/* A block cipher CBC structure */
+typedef struct {
+   /** The index of the cipher chosen */
+   int                 cipher, 
+   /** The block size of the given cipher */                        
+                       blocklen;
+   /** The current IV */
+   unsigned char       IV[MAXBLOCKSIZE];
+   /** The scheduled key */
+   symmetric_key       key;
+} symmetric_CBC;
+
+/* A block cipher CTR structure */
+typedef struct {
+   /** The index of the cipher chosen */
+   int                 cipher,
+   /** The block size of the given cipher */                        
+                       blocklen, 
+   /** The padding offset */
+                       padlen, 
+   /** The mode (endianess) of the CTR, 0==little, 1==big */                       
+                       mode;
+   /** The counter */                       
+   unsigned char       ctr[MAXBLOCKSIZE], 
+   /** The pad used to encrypt/decrypt */                       
+                       pad[MAXBLOCKSIZE];
+   /** The scheduled key */
+   symmetric_key       key;
+} symmetric_CTR;
+
+/* cipher descriptor table, last entry has "name == NULL" to mark the end of table */
+extern struct ltc_cipher_descriptor {
+   /** name of cipher */
+   char *name;
+   /** internal ID */
+   unsigned char ID;
+   /** min keysize (octets) */
+   int  min_key_length, 
+   /** max keysize (octets) */
+        max_key_length, 
+   /** block size (octets) */
+        block_length, 
+   /** default number of rounds */
+        default_rounds;
+   /** Setup the cipher 
+      @param key         The input symmetric key
+      @param keylen      The length of the input key (octets)
+      @param num_rounds  The requested number of rounds (0==default)
+      @param skey        [out] The destination of the scheduled key
+      @return CRYPT_OK if successful
+   */
+   int  (*setup)(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+   /** Encrypt a block
+      @param pt      The plaintext
+      @param ct      [out] The ciphertext
+      @param skey    The scheduled key
+   */
+   void (*ecb_encrypt)(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+   /** Decrypt a block
+      @param ct      The ciphertext
+      @param pt      [out] The plaintext
+      @param skey    The scheduled key
+   */
+   void (*ecb_decrypt)(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+   /** Test the block cipher
+       @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
+   */
+   int (*test)(void);
+
+   /** Terminate the context 
+      @param skey    The scheduled key
+   */
+   void (*done)(symmetric_key *skey);      
+
+   /** Determine a key size
+       @param keysize    [in/out] The size of the key desired and the suggested size
+       @return CRYPT_OK if successful
+   */
+   int  (*keysize)(int *keysize);
+
+/** Accelerators **/
+   /** Accelerated ECB encryption 
+       @param pt      Plaintext
+       @param ct      Ciphertext
+       @param blocks  The number of complete blocks to process
+       @param skey    The scheduled key context
+   */
+   void (*accel_ecb_encrypt)(const unsigned char *pt, unsigned char *ct, unsigned long blocks, symmetric_key *skey);
+
+   /** Accelerated ECB decryption 
+       @param pt      Plaintext
+       @param ct      Ciphertext
+       @param blocks  The number of complete blocks to process
+       @param skey    The scheduled key context
+   */
+   void (*accel_ecb_decrypt)(const unsigned char *ct, unsigned char *pt, unsigned long blocks, symmetric_key *skey);
+
+   /** Accelerated CBC encryption 
+       @param pt      Plaintext
+       @param ct      Ciphertext
+       @param blocks  The number of complete blocks to process
+       @param IV      The initial value (input/output)
+       @param skey    The scheduled key context
+   */
+   void (*accel_cbc_encrypt)(const unsigned char *pt, unsigned char *ct, unsigned long blocks, unsigned char *IV, symmetric_key *skey);
+
+   /** Accelerated CBC decryption 
+       @param pt      Plaintext
+       @param ct      Ciphertext
+       @param blocks  The number of complete blocks to process
+       @param IV      The initial value (input/output)
+       @param skey    The scheduled key context
+   */
+   void (*accel_cbc_decrypt)(const unsigned char *ct, unsigned char *pt, unsigned long blocks, unsigned char *IV, symmetric_key *skey);
+
+   /** Accelerated CTR encryption 
+       @param pt      Plaintext
+       @param ct      Ciphertext
+       @param blocks  The number of complete blocks to process
+       @param IV      The initial value (input/output)
+       @param mode    little or big endian counter (mode=0 or mode=1)
+       @param skey    The scheduled key context
+   */
+   void (*accel_ctr_encrypt)(const unsigned char *pt, unsigned char *ct, unsigned long blocks, unsigned char *IV, int mode, symmetric_key *skey);
+
+   /** Accelerated CCM packet (one-shot)
+       @param key        The secret key to use
+       @param keylen     The length of the secret key (octets)
+       @param nonce      The session nonce [use once]
+       @param noncelen   The length of the nonce
+       @param header     The header for the session
+       @param headerlen  The length of the header (octets)
+       @param pt         [out] The plaintext
+       @param ptlen      The length of the plaintext (octets)
+       @param ct         [out] The ciphertext
+       @param tag        [out] The destination tag
+       @param taglen     [in/out] The max size and resulting size of the authentication tag
+       @param direction  Encrypt or Decrypt direction (0 or 1)
+       @return CRYPT_OK if successful
+   */
+   void (*accel_ccm_memory)(
+       const unsigned char *key,    unsigned long keylen,
+       const unsigned char *nonce,  unsigned long noncelen,
+       const unsigned char *header, unsigned long headerlen,
+             unsigned char *pt,     unsigned long ptlen,
+             unsigned char *ct,
+             unsigned char *tag,    unsigned long *taglen,
+                       int  direction);
+
+   /** Accelerated GCM packet (one shot)
+       @param key               The secret key
+       @param keylen            The length of the secret key
+       @param IV                The initial vector 
+       @param IVlen             The length of the initial vector
+       @param adata             The additional authentication data (header)
+       @param adatalen          The length of the adata
+       @param pt                The plaintext
+       @param ptlen             The length of the plaintext (ciphertext length is the same)
+       @param ct                The ciphertext
+       @param tag               [out] The MAC tag
+       @param taglen            [in/out] The MAC tag length
+       @param direction         Encrypt or Decrypt mode (GCM_ENCRYPT or GCM_DECRYPT)
+   */
+   void (*accel_gcm_memory)(
+       const unsigned char *key,    unsigned long keylen,
+       const unsigned char *IV,     unsigned long IVlen,
+       const unsigned char *adata,  unsigned long adatalen,
+             unsigned char *pt,     unsigned long ptlen,
+             unsigned char *ct, 
+             unsigned char *tag,    unsigned long *taglen,
+                       int direction);
+} cipher_descriptor[];
+
+#ifdef BLOWFISH
+int blowfish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void blowfish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void blowfish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int blowfish_test(void);
+void blowfish_done(symmetric_key *skey);
+int blowfish_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor blowfish_desc;
+#endif
+
+#ifdef RC5
+int rc5_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void rc5_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void rc5_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int rc5_test(void);
+void rc5_done(symmetric_key *skey);
+int rc5_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor rc5_desc;
+#endif
+
+#ifdef RC6
+int rc6_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void rc6_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void rc6_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int rc6_test(void);
+void rc6_done(symmetric_key *skey);
+int rc6_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor rc6_desc;
+#endif
+
+#ifdef RC2
+int rc2_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void rc2_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void rc2_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int rc2_test(void);
+void rc2_done(symmetric_key *skey);
+int rc2_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor rc2_desc;
+#endif
+
+#ifdef SAFERP
+int saferp_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void saferp_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void saferp_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int saferp_test(void);
+void saferp_done(symmetric_key *skey);
+int saferp_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor saferp_desc;
+#endif
+
+#ifdef SAFER
+int safer_k64_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+int safer_sk64_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+int safer_k128_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+int safer_sk128_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void safer_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key);
+void safer_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key);
+int safer_k64_test(void);
+int safer_sk64_test(void);
+int safer_sk128_test(void);
+void safer_done(symmetric_key *skey);
+int safer_64_keysize(int *keysize);
+int safer_128_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor safer_k64_desc, safer_k128_desc, safer_sk64_desc, safer_sk128_desc;
+#endif
+
+#ifdef RIJNDAEL
+
+/* make aes an alias */
+#define aes_setup           rijndael_setup
+#define aes_ecb_encrypt     rijndael_ecb_encrypt
+#define aes_ecb_decrypt     rijndael_ecb_decrypt
+#define aes_test            rijndael_test
+#define aes_done            rijndael_done
+#define aes_keysize         rijndael_keysize
+
+#define aes_enc_setup           rijndael_enc_setup
+#define aes_enc_ecb_encrypt     rijndael_enc_ecb_encrypt
+#define aes_enc_keysize         rijndael_enc_keysize
+
+int rijndael_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void rijndael_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void rijndael_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int rijndael_test(void);
+void rijndael_done(symmetric_key *skey);
+int rijndael_keysize(int *keysize);
+int rijndael_enc_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void rijndael_enc_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void rijndael_enc_done(symmetric_key *skey);
+int rijndael_enc_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor rijndael_desc, aes_desc;
+extern const struct ltc_cipher_descriptor rijndael_enc_desc, aes_enc_desc;
+#endif
+
+#ifdef XTEA
+int xtea_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void xtea_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void xtea_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int xtea_test(void);
+void xtea_done(symmetric_key *skey);
+int xtea_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor xtea_desc;
+#endif
+
+#ifdef TWOFISH
+int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int twofish_test(void);
+void twofish_done(symmetric_key *skey);
+int twofish_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor twofish_desc;
+#endif
+
+#ifdef DES
+int des_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void des_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void des_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int des_test(void);
+void des_done(symmetric_key *skey);
+int des_keysize(int *keysize);
+int des3_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void des3_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void des3_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int des3_test(void);
+void des3_done(symmetric_key *skey);
+int des3_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor des_desc, des3_desc;
+#endif
+
+#ifdef CAST5
+int cast5_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void cast5_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void cast5_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int cast5_test(void);
+void cast5_done(symmetric_key *skey);
+int cast5_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor cast5_desc;
+#endif
+
+#ifdef NOEKEON
+int noekeon_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int noekeon_test(void);
+void noekeon_done(symmetric_key *skey);
+int noekeon_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor noekeon_desc;
+#endif
+
+#ifdef SKIPJACK
+int skipjack_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void skipjack_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void skipjack_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int skipjack_test(void);
+void skipjack_done(symmetric_key *skey);
+int skipjack_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor skipjack_desc;
+#endif
+
+#ifdef KHAZAD
+int khazad_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void khazad_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void khazad_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int khazad_test(void);
+void khazad_done(symmetric_key *skey);
+int khazad_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor khazad_desc;
+#endif
+
+#ifdef ANUBIS
+int anubis_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey);
+void anubis_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey);
+void anubis_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey);
+int anubis_test(void);
+void anubis_done(symmetric_key *skey);
+int anubis_keysize(int *keysize);
+extern const struct ltc_cipher_descriptor anubis_desc;
+#endif
+
+#ifdef ECB
+int ecb_start(int cipher, const unsigned char *key, 
+              int keylen, int num_rounds, symmetric_ECB *ecb);
+int ecb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_ECB *ecb);
+int ecb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_ECB *ecb);
+int ecb_done(symmetric_ECB *ecb);
+#endif
+
+#ifdef CFB
+int cfb_start(int cipher, const unsigned char *IV, const unsigned char *key, 
+              int keylen, int num_rounds, symmetric_CFB *cfb);
+int cfb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CFB *cfb);
+int cfb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CFB *cfb);
+int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb);
+int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb);
+int cfb_done(symmetric_CFB *cfb);
+#endif
+
+#ifdef OFB
+int ofb_start(int cipher, const unsigned char *IV, const unsigned char *key, 
+              int keylen, int num_rounds, symmetric_OFB *ofb);
+int ofb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_OFB *ofb);
+int ofb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_OFB *ofb);
+int ofb_getiv(unsigned char *IV, unsigned long *len, symmetric_OFB *ofb);
+int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb);
+int ofb_done(symmetric_OFB *ofb);
+#endif
+
+#ifdef CBC
+int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key,
+               int keylen, int num_rounds, symmetric_CBC *cbc);
+int cbc_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CBC *cbc);
+int cbc_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CBC *cbc);
+int cbc_getiv(unsigned char *IV, unsigned long *len, symmetric_CBC *cbc);
+int cbc_setiv(const unsigned char *IV, unsigned long len, symmetric_CBC *cbc);
+int cbc_done(symmetric_CBC *cbc);
+#endif
+
+#ifdef CTR
+int ctr_start(int cipher, const unsigned char *IV, const unsigned char *key, 
+              int keylen, int num_rounds, symmetric_CTR *ctr);
+int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CTR *ctr);
+int ctr_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CTR *ctr);
+int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr);
+int ctr_setiv(const unsigned char *IV, unsigned long len, symmetric_CTR *ctr);
+int ctr_done(symmetric_CTR *ctr);
+#endif
+    
+int find_cipher(const char *name);
+int find_cipher_any(const char *name, int blocklen, int keylen);
+int find_cipher_id(unsigned char ID);
+
+int register_cipher(const struct ltc_cipher_descriptor *cipher);
+int unregister_cipher(const struct ltc_cipher_descriptor *cipher);
+
+int cipher_is_valid(int idx);
+