diff --git a/jni/libzrtp/sources/cryptcommon/aes_modes.c b/jni/libzrtp/sources/cryptcommon/aes_modes.c
new file mode 100644
index 0000000..2ffa783
--- /dev/null
+++ b/jni/libzrtp/sources/cryptcommon/aes_modes.c
@@ -0,0 +1,946 @@
+/*
+---------------------------------------------------------------------------
+Copyright (c) 1998-2010, Brian Gladman, Worcester, UK. All rights reserved.
+
+The redistribution and use of this software (with or without changes)
+is allowed without the payment of fees or royalties provided that:
+
+  source code distributions include the above copyright notice, this
+  list of conditions and the following disclaimer;
+
+  binary distributions include the above copyright notice, this list
+  of conditions and the following disclaimer in their documentation.
+
+This software is provided 'as is' with no explicit or implied warranties
+in respect of its operation, including, but not limited to, correctness
+and fitness for purpose.
+---------------------------------------------------------------------------
+Issue Date: 20/12/2007
+
+ These subroutines implement multiple block AES modes for ECB, CBC, CFB,
+ OFB and CTR encryption,  The code provides support for the VIA Advanced
+ Cryptography Engine (ACE).
+
+ NOTE: In the following subroutines, the AES contexts (ctx) must be
+ 16 byte aligned if VIA ACE is being used
+*/
+
+#include <string.h>
+#include <assert.h>
+
+#include "aesopt.h"
+
+#if defined( AES_MODES )
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
+#if defined( _MSC_VER ) && ( _MSC_VER > 800 )
+#pragma intrinsic(memcpy)
+#endif
+
+#define BFR_BLOCKS      8
+
+/* These values are used to detect long word alignment in order to */
+/* speed up some buffer operations. This facility may not work on  */
+/* some machines so this define can be commented out if necessary  */
+
+#define FAST_BUFFER_OPERATIONS
+
+#define lp32(x)         ((uint_32t*)(x))
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+#include "aes_via_ace.h"
+
+#pragma pack(16)
+
+aligned_array(unsigned long,    enc_gen_table, 12, 16) =    NEH_ENC_GEN_DATA;
+aligned_array(unsigned long,   enc_load_table, 12, 16) =   NEH_ENC_LOAD_DATA;
+aligned_array(unsigned long, enc_hybrid_table, 12, 16) = NEH_ENC_HYBRID_DATA;
+aligned_array(unsigned long,    dec_gen_table, 12, 16) =    NEH_DEC_GEN_DATA;
+aligned_array(unsigned long,   dec_load_table, 12, 16) =   NEH_DEC_LOAD_DATA;
+aligned_array(unsigned long, dec_hybrid_table, 12, 16) = NEH_DEC_HYBRID_DATA;
+
+/* NOTE: These control word macros must only be used after  */
+/* a key has been set up because they depend on key size    */
+/* See the VIA ACE documentation for key type information   */
+/* and aes_via_ace.h for non-default NEH_KEY_TYPE values    */
+
+#ifndef NEH_KEY_TYPE
+#  define NEH_KEY_TYPE NEH_HYBRID
+#endif
+
+#if NEH_KEY_TYPE == NEH_LOAD
+#define kd_adr(c)   ((uint_8t*)(c)->ks)
+#elif NEH_KEY_TYPE == NEH_GENERATE
+#define kd_adr(c)   ((uint_8t*)(c)->ks + (c)->inf.b[0])
+#elif NEH_KEY_TYPE == NEH_HYBRID
+#define kd_adr(c)   ((uint_8t*)(c)->ks + ((c)->inf.b[0] == 160 ? 160 : 0))
+#else
+#error no key type defined for VIA ACE 
+#endif
+
+#else
+
+#define aligned_array(type, name, no, stride) type name[no]
+#define aligned_auto(type, name, no, stride)  type name[no]
+
+#endif
+
+#if defined( _MSC_VER ) && _MSC_VER > 1200
+
+#define via_cwd(cwd, ty, dir, len) \
+    unsigned long* cwd = (dir##_##ty##_table + ((len - 128) >> 4))
+
+#else
+
+#define via_cwd(cwd, ty, dir, len)              \
+    aligned_auto(unsigned long, cwd, 4, 16);    \
+    cwd[1] = cwd[2] = cwd[3] = 0;               \
+    cwd[0] = neh_##dir##_##ty##_key(len)
+
+#endif
+
+/* test the code for detecting and setting pointer alignment */
+
+AES_RETURN aes_test_alignment_detection(unsigned int n)	/* 4 <= n <= 16 */
+{	uint_8t	p[16];
+    uint_32t i, count_eq = 0, count_neq = 0;
+
+    if(n < 4 || n > 16)
+        return EXIT_FAILURE;
+
+    for(i = 0; i < n; ++i)
+    {
+        uint_8t *qf = ALIGN_FLOOR(p + i, n),
+                *qh =  ALIGN_CEIL(p + i, n);
+        
+        if(qh == qf)
+            ++count_eq;
+        else if(qh == qf + n)
+            ++count_neq;
+        else
+            return EXIT_FAILURE;
+    }
+    return (count_eq != 1 || count_neq != n - 1 ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+AES_RETURN aes_mode_reset(aes_encrypt_ctx ctx[1])
+{
+    ctx->inf.b[2] = 0;
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_ecb_encrypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, const aes_encrypt_ctx ctx[1])
+{   int nb = len >> 4;
+
+    if(len & (AES_BLOCK_SIZE - 1))
+        return EXIT_FAILURE;
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+    if(ctx->inf.b[1] == 0xff)
+    {   uint_8t *ksp = (uint_8t*)(ctx->ks);
+        via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192);
+
+        if(ALIGN_OFFSET( ctx, 16 ))
+            return EXIT_FAILURE;
+
+        if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ))
+        {
+            via_ecb_op5(ksp, cwd, ibuf, obuf, nb);
+        }
+        else
+        {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+            uint_8t *ip, *op;
+
+            while(nb)
+            {
+                int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb);
+
+                ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                if(ip != ibuf)
+                    memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                via_ecb_op5(ksp, cwd, ip, op, m);
+
+                if(op != obuf)
+                    memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                ibuf += m * AES_BLOCK_SIZE;
+                obuf += m * AES_BLOCK_SIZE;
+                nb -= m;
+            }
+        }
+
+        return EXIT_SUCCESS;
+    }
+
+#endif
+
+#if !defined( ASSUME_VIA_ACE_PRESENT )
+    while(nb--)
+    {
+        if(aes_encrypt(ibuf, obuf, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+        ibuf += AES_BLOCK_SIZE;
+        obuf += AES_BLOCK_SIZE;
+    }
+#endif
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_ecb_decrypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, const aes_decrypt_ctx ctx[1])
+{   int nb = len >> 4;
+
+    if(len & (AES_BLOCK_SIZE - 1))
+        return EXIT_FAILURE;
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+    if(ctx->inf.b[1] == 0xff)
+    {   uint_8t *ksp = kd_adr(ctx);
+        via_cwd(cwd, hybrid, dec, 2 * ctx->inf.b[0] - 192);
+
+        if(ALIGN_OFFSET( ctx, 16 ))
+            return EXIT_FAILURE;
+
+        if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ))
+        {
+            via_ecb_op5(ksp, cwd, ibuf, obuf, nb);
+        }
+        else
+        {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+            uint_8t *ip, *op;
+
+            while(nb)
+            {
+                int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb);
+
+                ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                if(ip != ibuf)
+                    memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                via_ecb_op5(ksp, cwd, ip, op, m);
+
+                if(op != obuf)
+                    memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                ibuf += m * AES_BLOCK_SIZE;
+                obuf += m * AES_BLOCK_SIZE;
+                nb -= m;
+            }
+        }
+
+        return EXIT_SUCCESS;
+    }
+
+#endif
+
+#if !defined( ASSUME_VIA_ACE_PRESENT )
+    while(nb--)
+    {
+        if(aes_decrypt(ibuf, obuf, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+        ibuf += AES_BLOCK_SIZE;
+        obuf += AES_BLOCK_SIZE;
+    }
+#endif
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_cbc_encrypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, unsigned char *iv, const aes_encrypt_ctx ctx[1])
+{   int nb = len >> 4;
+
+    if(len & (AES_BLOCK_SIZE - 1))
+        return EXIT_FAILURE;
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+    if(ctx->inf.b[1] == 0xff)
+    {   uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv;
+        aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16);
+        via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192);
+
+        if(ALIGN_OFFSET( ctx, 16 ))
+            return EXIT_FAILURE;
+
+        if(ALIGN_OFFSET( iv, 16 ))   /* ensure an aligned iv */
+        {
+            ivp = liv;
+            memcpy(liv, iv, AES_BLOCK_SIZE);
+        }
+
+        if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ) && !ALIGN_OFFSET( iv, 16 ))
+        {
+            via_cbc_op7(ksp, cwd, ibuf, obuf, nb, ivp, ivp);
+        }
+        else
+        {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+            uint_8t *ip, *op;
+
+            while(nb)
+            {
+                int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb);
+
+                ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                if(ip != ibuf)
+                    memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                via_cbc_op7(ksp, cwd, ip, op, m, ivp, ivp);
+
+                if(op != obuf)
+                    memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                ibuf += m * AES_BLOCK_SIZE;
+                obuf += m * AES_BLOCK_SIZE;
+                nb -= m;
+            }
+        }
+
+        if(iv != ivp)
+            memcpy(iv, ivp, AES_BLOCK_SIZE);
+
+        return EXIT_SUCCESS;
+    }
+
+#endif
+
+#if !defined( ASSUME_VIA_ACE_PRESENT )
+# ifdef FAST_BUFFER_OPERATIONS
+    if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( iv, 4 ))
+        while(nb--)
+        {
+            lp32(iv)[0] ^= lp32(ibuf)[0];
+            lp32(iv)[1] ^= lp32(ibuf)[1];
+            lp32(iv)[2] ^= lp32(ibuf)[2];
+            lp32(iv)[3] ^= lp32(ibuf)[3];
+            if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                return EXIT_FAILURE;
+            memcpy(obuf, iv, AES_BLOCK_SIZE);
+            ibuf += AES_BLOCK_SIZE;
+            obuf += AES_BLOCK_SIZE;
+        }
+    else
+# endif
+        while(nb--)
+        {
+            iv[ 0] ^= ibuf[ 0]; iv[ 1] ^= ibuf[ 1];
+            iv[ 2] ^= ibuf[ 2]; iv[ 3] ^= ibuf[ 3];
+            iv[ 4] ^= ibuf[ 4]; iv[ 5] ^= ibuf[ 5];
+            iv[ 6] ^= ibuf[ 6]; iv[ 7] ^= ibuf[ 7];
+            iv[ 8] ^= ibuf[ 8]; iv[ 9] ^= ibuf[ 9];
+            iv[10] ^= ibuf[10]; iv[11] ^= ibuf[11];
+            iv[12] ^= ibuf[12]; iv[13] ^= ibuf[13];
+            iv[14] ^= ibuf[14]; iv[15] ^= ibuf[15];
+            if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                return EXIT_FAILURE;
+            memcpy(obuf, iv, AES_BLOCK_SIZE);
+            ibuf += AES_BLOCK_SIZE;
+            obuf += AES_BLOCK_SIZE;
+        }
+#endif
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_cbc_decrypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, unsigned char *iv, const aes_decrypt_ctx ctx[1])
+{   unsigned char tmp[AES_BLOCK_SIZE];
+    int nb = len >> 4;
+
+    if(len & (AES_BLOCK_SIZE - 1))
+        return EXIT_FAILURE;
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+    if(ctx->inf.b[1] == 0xff)
+    {   uint_8t *ksp = kd_adr(ctx), *ivp = iv;
+        aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16);
+        via_cwd(cwd, hybrid, dec, 2 * ctx->inf.b[0] - 192);
+
+        if(ALIGN_OFFSET( ctx, 16 ))
+            return EXIT_FAILURE;
+
+        if(ALIGN_OFFSET( iv, 16 ))   /* ensure an aligned iv */
+        {
+            ivp = liv;
+            memcpy(liv, iv, AES_BLOCK_SIZE);
+        }
+
+        if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ) && !ALIGN_OFFSET( iv, 16 ))
+        {
+            via_cbc_op6(ksp, cwd, ibuf, obuf, nb, ivp);
+        }
+        else
+        {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+            uint_8t *ip, *op;
+
+            while(nb)
+            {
+                int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb);
+
+                ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                if(ip != ibuf)
+                    memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                via_cbc_op6(ksp, cwd, ip, op, m, ivp);
+
+                if(op != obuf)
+                    memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                ibuf += m * AES_BLOCK_SIZE;
+                obuf += m * AES_BLOCK_SIZE;
+                nb -= m;
+            }
+        }
+
+        if(iv != ivp)
+            memcpy(iv, ivp, AES_BLOCK_SIZE);
+
+        return EXIT_SUCCESS;
+    }
+#endif
+
+#if !defined( ASSUME_VIA_ACE_PRESENT )
+# ifdef FAST_BUFFER_OPERATIONS
+    if(!ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( iv, 4 ))
+        while(nb--)
+        {
+            memcpy(tmp, ibuf, AES_BLOCK_SIZE);
+            if(aes_decrypt(ibuf, obuf, ctx) != EXIT_SUCCESS)
+                return EXIT_FAILURE;
+            lp32(obuf)[0] ^= lp32(iv)[0];
+            lp32(obuf)[1] ^= lp32(iv)[1];
+            lp32(obuf)[2] ^= lp32(iv)[2];
+            lp32(obuf)[3] ^= lp32(iv)[3];
+            memcpy(iv, tmp, AES_BLOCK_SIZE);
+            ibuf += AES_BLOCK_SIZE;
+            obuf += AES_BLOCK_SIZE;
+        }
+    else
+# endif
+        while(nb--)
+        {
+            memcpy(tmp, ibuf, AES_BLOCK_SIZE);
+            if(aes_decrypt(ibuf, obuf, ctx) != EXIT_SUCCESS)
+                return EXIT_FAILURE;
+            obuf[ 0] ^= iv[ 0]; obuf[ 1] ^= iv[ 1];
+            obuf[ 2] ^= iv[ 2]; obuf[ 3] ^= iv[ 3];
+            obuf[ 4] ^= iv[ 4]; obuf[ 5] ^= iv[ 5];
+            obuf[ 6] ^= iv[ 6]; obuf[ 7] ^= iv[ 7];
+            obuf[ 8] ^= iv[ 8]; obuf[ 9] ^= iv[ 9];
+            obuf[10] ^= iv[10]; obuf[11] ^= iv[11];
+            obuf[12] ^= iv[12]; obuf[13] ^= iv[13];
+            obuf[14] ^= iv[14]; obuf[15] ^= iv[15];
+            memcpy(iv, tmp, AES_BLOCK_SIZE);
+            ibuf += AES_BLOCK_SIZE;
+            obuf += AES_BLOCK_SIZE;
+        }
+#endif
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_cfb_encrypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, unsigned char *iv, aes_encrypt_ctx ctx[1])
+{   int cnt = 0, b_pos = (int)ctx->inf.b[2], nb;
+
+    if(b_pos)           /* complete any partial block   */
+    {
+        while(b_pos < AES_BLOCK_SIZE && cnt < len)
+        {
+            *obuf++ = (iv[b_pos++] ^= *ibuf++);
+            cnt++;
+        }
+
+        b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos);
+    }
+
+    if((nb = (len - cnt) >> 4) != 0)    /* process whole blocks */
+    {
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+        if(ctx->inf.b[1] == 0xff)
+        {   int m;
+            uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv;
+            aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16);
+            via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192);
+
+            if(ALIGN_OFFSET( ctx, 16 ))
+                return EXIT_FAILURE;
+
+            if(ALIGN_OFFSET( iv, 16 ))   /* ensure an aligned iv */
+            {
+                ivp = liv;
+                memcpy(liv, iv, AES_BLOCK_SIZE);
+            }
+
+            if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ))
+            {
+                via_cfb_op7(ksp, cwd, ibuf, obuf, nb, ivp, ivp);
+                ibuf += nb * AES_BLOCK_SIZE;
+                obuf += nb * AES_BLOCK_SIZE;
+                cnt  += nb * AES_BLOCK_SIZE;
+            }
+            else    /* input, output or both are unaligned  */
+            {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+                uint_8t *ip, *op;
+
+                while(nb)
+                {
+                    m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb), nb -= m;
+
+                    ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                    op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                    if(ip != ibuf)
+                        memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                    via_cfb_op7(ksp, cwd, ip, op, m, ivp, ivp);
+
+                    if(op != obuf)
+                        memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                    ibuf += m * AES_BLOCK_SIZE;
+                    obuf += m * AES_BLOCK_SIZE;
+                    cnt  += m * AES_BLOCK_SIZE;
+                }
+            }
+
+            if(ivp != iv)
+                memcpy(iv, ivp, AES_BLOCK_SIZE);
+        }
+#else
+# ifdef FAST_BUFFER_OPERATIONS
+        if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( iv, 4 ))
+            while(cnt + AES_BLOCK_SIZE <= len)
+            {
+                assert(b_pos == 0);
+                if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                    return EXIT_FAILURE;
+                lp32(obuf)[0] = lp32(iv)[0] ^= lp32(ibuf)[0];
+                lp32(obuf)[1] = lp32(iv)[1] ^= lp32(ibuf)[1];
+                lp32(obuf)[2] = lp32(iv)[2] ^= lp32(ibuf)[2];
+                lp32(obuf)[3] = lp32(iv)[3] ^= lp32(ibuf)[3];
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+                cnt  += AES_BLOCK_SIZE;
+            }
+        else
+# endif
+            while(cnt + AES_BLOCK_SIZE <= len)
+            {
+                assert(b_pos == 0);
+                if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                    return EXIT_FAILURE;
+                obuf[ 0] = iv[ 0] ^= ibuf[ 0]; obuf[ 1] = iv[ 1] ^= ibuf[ 1];
+                obuf[ 2] = iv[ 2] ^= ibuf[ 2]; obuf[ 3] = iv[ 3] ^= ibuf[ 3];
+                obuf[ 4] = iv[ 4] ^= ibuf[ 4]; obuf[ 5] = iv[ 5] ^= ibuf[ 5];
+                obuf[ 6] = iv[ 6] ^= ibuf[ 6]; obuf[ 7] = iv[ 7] ^= ibuf[ 7];
+                obuf[ 8] = iv[ 8] ^= ibuf[ 8]; obuf[ 9] = iv[ 9] ^= ibuf[ 9];
+                obuf[10] = iv[10] ^= ibuf[10]; obuf[11] = iv[11] ^= ibuf[11];
+                obuf[12] = iv[12] ^= ibuf[12]; obuf[13] = iv[13] ^= ibuf[13];
+                obuf[14] = iv[14] ^= ibuf[14]; obuf[15] = iv[15] ^= ibuf[15];
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+                cnt  += AES_BLOCK_SIZE;
+            }
+#endif
+    }
+
+    while(cnt < len)
+    {
+        if(!b_pos && aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+
+        while(cnt < len && b_pos < AES_BLOCK_SIZE)
+        {
+            *obuf++ = (iv[b_pos++] ^= *ibuf++);
+            cnt++;
+        }
+
+        b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos);
+    }
+
+    ctx->inf.b[2] = (uint_8t)b_pos;
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_cfb_decrypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, unsigned char *iv, aes_encrypt_ctx ctx[1])
+{   int cnt = 0, b_pos = (int)ctx->inf.b[2], nb;
+
+    if(b_pos)           /* complete any partial block   */
+    {   uint_8t t;
+
+        while(b_pos < AES_BLOCK_SIZE && cnt < len)
+        {
+            t = *ibuf++;
+            *obuf++ = t ^ iv[b_pos];
+            iv[b_pos++] = t;
+            cnt++;
+        }
+
+        b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos);
+    }
+
+    if((nb = (len - cnt) >> 4) != 0)    /* process whole blocks */
+    {
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+        if(ctx->inf.b[1] == 0xff)
+        {   int m;
+            uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv;
+            aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16);
+            via_cwd(cwd, hybrid, dec, 2 * ctx->inf.b[0] - 192);
+
+            if(ALIGN_OFFSET( ctx, 16 ))
+                return EXIT_FAILURE;
+
+            if(ALIGN_OFFSET( iv, 16 ))   /* ensure an aligned iv */
+            {
+                ivp = liv;
+                memcpy(liv, iv, AES_BLOCK_SIZE);
+            }
+
+            if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ))
+            {
+                via_cfb_op6(ksp, cwd, ibuf, obuf, nb, ivp);
+                ibuf += nb * AES_BLOCK_SIZE;
+                obuf += nb * AES_BLOCK_SIZE;
+                cnt  += nb * AES_BLOCK_SIZE;
+            }
+            else    /* input, output or both are unaligned  */
+            {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+                uint_8t *ip, *op;
+
+                while(nb)
+                {
+                    m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb), nb -= m;
+
+                    ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                    op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                    if(ip != ibuf)  /* input buffer is not aligned */
+                        memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                    via_cfb_op6(ksp, cwd, ip, op, m, ivp);
+
+                    if(op != obuf)  /* output buffer is not aligned */
+                        memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                    ibuf += m * AES_BLOCK_SIZE;
+                    obuf += m * AES_BLOCK_SIZE;
+                    cnt  += m * AES_BLOCK_SIZE;
+                }
+            }
+
+            if(ivp != iv)
+                memcpy(iv, ivp, AES_BLOCK_SIZE);
+        }
+#else
+# ifdef FAST_BUFFER_OPERATIONS
+        if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) &&!ALIGN_OFFSET( iv, 4 ))
+            while(cnt + AES_BLOCK_SIZE <= len)
+            {   uint_32t t;
+
+                assert(b_pos == 0);
+                if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                    return EXIT_FAILURE;
+                t = lp32(ibuf)[0], lp32(obuf)[0] = t ^ lp32(iv)[0], lp32(iv)[0] = t;
+                t = lp32(ibuf)[1], lp32(obuf)[1] = t ^ lp32(iv)[1], lp32(iv)[1] = t;
+                t = lp32(ibuf)[2], lp32(obuf)[2] = t ^ lp32(iv)[2], lp32(iv)[2] = t;
+                t = lp32(ibuf)[3], lp32(obuf)[3] = t ^ lp32(iv)[3], lp32(iv)[3] = t;
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+                cnt  += AES_BLOCK_SIZE;
+            }
+        else
+# endif
+            while(cnt + AES_BLOCK_SIZE <= len)
+            {   uint_8t t;
+
+                assert(b_pos == 0);
+                if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                    return EXIT_FAILURE;
+                t = ibuf[ 0], obuf[ 0] = t ^ iv[ 0], iv[ 0] = t;
+                t = ibuf[ 1], obuf[ 1] = t ^ iv[ 1], iv[ 1] = t;
+                t = ibuf[ 2], obuf[ 2] = t ^ iv[ 2], iv[ 2] = t;
+                t = ibuf[ 3], obuf[ 3] = t ^ iv[ 3], iv[ 3] = t;
+                t = ibuf[ 4], obuf[ 4] = t ^ iv[ 4], iv[ 4] = t;
+                t = ibuf[ 5], obuf[ 5] = t ^ iv[ 5], iv[ 5] = t;
+                t = ibuf[ 6], obuf[ 6] = t ^ iv[ 6], iv[ 6] = t;
+                t = ibuf[ 7], obuf[ 7] = t ^ iv[ 7], iv[ 7] = t;
+                t = ibuf[ 8], obuf[ 8] = t ^ iv[ 8], iv[ 8] = t;
+                t = ibuf[ 9], obuf[ 9] = t ^ iv[ 9], iv[ 9] = t;
+                t = ibuf[10], obuf[10] = t ^ iv[10], iv[10] = t;
+                t = ibuf[11], obuf[11] = t ^ iv[11], iv[11] = t;
+                t = ibuf[12], obuf[12] = t ^ iv[12], iv[12] = t;
+                t = ibuf[13], obuf[13] = t ^ iv[13], iv[13] = t;
+                t = ibuf[14], obuf[14] = t ^ iv[14], iv[14] = t;
+                t = ibuf[15], obuf[15] = t ^ iv[15], iv[15] = t;
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+                cnt  += AES_BLOCK_SIZE;
+            }
+#endif
+    }
+
+    while(cnt < len)
+    {   uint_8t t;
+
+        if(!b_pos && aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+
+        while(cnt < len && b_pos < AES_BLOCK_SIZE)
+        {
+            t = *ibuf++;
+            *obuf++ = t ^ iv[b_pos];
+            iv[b_pos++] = t;
+            cnt++;
+        }
+
+        b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos);
+    }
+
+    ctx->inf.b[2] = (uint_8t)b_pos;
+    return EXIT_SUCCESS;
+}
+
+AES_RETURN aes_ofb_crypt(const unsigned char *ibuf, unsigned char *obuf,
+                    int len, unsigned char *iv, aes_encrypt_ctx ctx[1])
+{   int cnt = 0, b_pos = (int)ctx->inf.b[2], nb;
+
+    if(b_pos)           /* complete any partial block   */
+    {
+        while(b_pos < AES_BLOCK_SIZE && cnt < len)
+        {
+            *obuf++ = iv[b_pos++] ^ *ibuf++;
+            cnt++;
+        }
+
+        b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos);
+    }
+
+    if((nb = (len - cnt) >> 4) != 0)   /* process whole blocks */
+    {
+#if defined( USE_VIA_ACE_IF_PRESENT )
+
+        if(ctx->inf.b[1] == 0xff)
+        {   int m;
+            uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv;
+            aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16);
+            via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192);
+
+            if(ALIGN_OFFSET( ctx, 16 ))
+                return EXIT_FAILURE;
+
+            if(ALIGN_OFFSET( iv, 16 ))   /* ensure an aligned iv */
+            {
+                ivp = liv;
+                memcpy(liv, iv, AES_BLOCK_SIZE);
+            }
+
+            if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ))
+            {
+                via_ofb_op6(ksp, cwd, ibuf, obuf, nb, ivp);
+                ibuf += nb * AES_BLOCK_SIZE;
+                obuf += nb * AES_BLOCK_SIZE;
+                cnt  += nb * AES_BLOCK_SIZE;
+            }
+            else    /* input, output or both are unaligned  */
+        {   aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16);
+            uint_8t *ip, *op;
+
+                while(nb)
+                {
+                    m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb), nb -= m;
+
+                    ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf);
+                    op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf);
+
+                    if(ip != ibuf)
+                        memcpy(buf, ibuf, m * AES_BLOCK_SIZE);
+
+                    via_ofb_op6(ksp, cwd, ip, op, m, ivp);
+
+                    if(op != obuf)
+                        memcpy(obuf, buf, m * AES_BLOCK_SIZE);
+
+                    ibuf += m * AES_BLOCK_SIZE;
+                    obuf += m * AES_BLOCK_SIZE;
+                    cnt  += m * AES_BLOCK_SIZE;
+                }
+            }
+
+            if(ivp != iv)
+                memcpy(iv, ivp, AES_BLOCK_SIZE);
+        }
+#else
+# ifdef FAST_BUFFER_OPERATIONS
+        if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( iv, 4 ))
+            while(cnt + AES_BLOCK_SIZE <= len)
+            {
+                assert(b_pos == 0);
+                if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                    return EXIT_FAILURE;
+                lp32(obuf)[0] = lp32(iv)[0] ^ lp32(ibuf)[0];
+                lp32(obuf)[1] = lp32(iv)[1] ^ lp32(ibuf)[1];
+                lp32(obuf)[2] = lp32(iv)[2] ^ lp32(ibuf)[2];
+                lp32(obuf)[3] = lp32(iv)[3] ^ lp32(ibuf)[3];
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+                cnt  += AES_BLOCK_SIZE;
+            }
+        else
+# endif
+            while(cnt + AES_BLOCK_SIZE <= len)
+            {
+                assert(b_pos == 0);
+                if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+                    return EXIT_FAILURE;
+                obuf[ 0] = iv[ 0] ^ ibuf[ 0]; obuf[ 1] = iv[ 1] ^ ibuf[ 1];
+                obuf[ 2] = iv[ 2] ^ ibuf[ 2]; obuf[ 3] = iv[ 3] ^ ibuf[ 3];
+                obuf[ 4] = iv[ 4] ^ ibuf[ 4]; obuf[ 5] = iv[ 5] ^ ibuf[ 5];
+                obuf[ 6] = iv[ 6] ^ ibuf[ 6]; obuf[ 7] = iv[ 7] ^ ibuf[ 7];
+                obuf[ 8] = iv[ 8] ^ ibuf[ 8]; obuf[ 9] = iv[ 9] ^ ibuf[ 9];
+                obuf[10] = iv[10] ^ ibuf[10]; obuf[11] = iv[11] ^ ibuf[11];
+                obuf[12] = iv[12] ^ ibuf[12]; obuf[13] = iv[13] ^ ibuf[13];
+                obuf[14] = iv[14] ^ ibuf[14]; obuf[15] = iv[15] ^ ibuf[15];
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+                cnt  += AES_BLOCK_SIZE;
+            }
+#endif
+    }
+
+    while(cnt < len)
+    {
+        if(!b_pos && aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+
+        while(cnt < len && b_pos < AES_BLOCK_SIZE)
+        {
+            *obuf++ = iv[b_pos++] ^ *ibuf++;
+            cnt++;
+        }
+
+        b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos);
+    }
+
+    ctx->inf.b[2] = (uint_8t)b_pos;
+    return EXIT_SUCCESS;
+}
+
+#define BFR_LENGTH  (BFR_BLOCKS * AES_BLOCK_SIZE)
+
+AES_RETURN aes_ctr_crypt(const unsigned char *ibuf, unsigned char *obuf,
+            int len, unsigned char *cbuf, cbuf_inc ctr_inc, aes_encrypt_ctx ctx[1])
+{   unsigned char   *ip;
+    int             i, blen, b_pos = (int)(ctx->inf.b[2]);
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+    aligned_auto(uint_8t, buf, BFR_LENGTH, 16);
+    if(ctx->inf.b[1] == 0xff && ALIGN_OFFSET( ctx, 16 ))
+        return EXIT_FAILURE;
+#else
+    uint_8t buf[BFR_LENGTH];
+#endif
+
+    if(b_pos)
+    {
+        memcpy(buf, cbuf, AES_BLOCK_SIZE);
+        if(aes_ecb_encrypt(buf, buf, AES_BLOCK_SIZE, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+
+        while(b_pos < AES_BLOCK_SIZE && len)
+        {
+            *obuf++ = *ibuf++ ^ buf[b_pos++];
+            --len;
+        }
+
+        if(len)
+            ctr_inc(cbuf), b_pos = 0;
+    }
+
+    while(len)
+    {
+        blen = (len > BFR_LENGTH ? BFR_LENGTH : len), len -= blen;
+
+        for(i = 0, ip = buf; i < (blen >> 4); ++i)
+        {
+            memcpy(ip, cbuf, AES_BLOCK_SIZE);
+            ctr_inc(cbuf);
+            ip += AES_BLOCK_SIZE;
+        }
+
+        if(blen & (AES_BLOCK_SIZE - 1))
+            memcpy(ip, cbuf, AES_BLOCK_SIZE), i++;
+
+#if defined( USE_VIA_ACE_IF_PRESENT )
+        if(ctx->inf.b[1] == 0xff)
+        {
+            via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192);
+            via_ecb_op5((ctx->ks), cwd, buf, buf, i);
+        }
+        else
+#endif
+        if(aes_ecb_encrypt(buf, buf, i * AES_BLOCK_SIZE, ctx) != EXIT_SUCCESS)
+            return EXIT_FAILURE;
+
+        i = 0; ip = buf;
+# ifdef FAST_BUFFER_OPERATIONS
+        if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( ip, 4 ))
+            while(i + AES_BLOCK_SIZE <= blen)
+            {
+                lp32(obuf)[0] = lp32(ibuf)[0] ^ lp32(ip)[0];
+                lp32(obuf)[1] = lp32(ibuf)[1] ^ lp32(ip)[1];
+                lp32(obuf)[2] = lp32(ibuf)[2] ^ lp32(ip)[2];
+                lp32(obuf)[3] = lp32(ibuf)[3] ^ lp32(ip)[3];
+                i += AES_BLOCK_SIZE;
+                ip += AES_BLOCK_SIZE;
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+            }
+        else
+#endif
+            while(i + AES_BLOCK_SIZE <= blen)
+            {
+                obuf[ 0] = ibuf[ 0] ^ ip[ 0]; obuf[ 1] = ibuf[ 1] ^ ip[ 1];
+                obuf[ 2] = ibuf[ 2] ^ ip[ 2]; obuf[ 3] = ibuf[ 3] ^ ip[ 3];
+                obuf[ 4] = ibuf[ 4] ^ ip[ 4]; obuf[ 5] = ibuf[ 5] ^ ip[ 5];
+                obuf[ 6] = ibuf[ 6] ^ ip[ 6]; obuf[ 7] = ibuf[ 7] ^ ip[ 7];
+                obuf[ 8] = ibuf[ 8] ^ ip[ 8]; obuf[ 9] = ibuf[ 9] ^ ip[ 9];
+                obuf[10] = ibuf[10] ^ ip[10]; obuf[11] = ibuf[11] ^ ip[11];
+                obuf[12] = ibuf[12] ^ ip[12]; obuf[13] = ibuf[13] ^ ip[13];
+                obuf[14] = ibuf[14] ^ ip[14]; obuf[15] = ibuf[15] ^ ip[15];
+                i += AES_BLOCK_SIZE;
+                ip += AES_BLOCK_SIZE;
+                ibuf += AES_BLOCK_SIZE;
+                obuf += AES_BLOCK_SIZE;
+            }
+
+        while(i++ < blen)
+            *obuf++ = *ibuf++ ^ ip[b_pos++];
+    }
+
+    ctx->inf.b[2] = (uint_8t)b_pos;
+    return EXIT_SUCCESS;
+}
+
+#if defined(__cplusplus)
+}
+#endif
+#endif