diff --git a/crypto/des/des.c b/crypto/des/des.c
index 9cd75f5..9a0f5ac 100644
--- a/crypto/des/des.c
+++ b/crypto/des/des.c
@@ -505,9 +505,9 @@
   data[1] = ROTATE(r, 3) & 0xffffffffL;
 }
 
-static void DES_encrypt3(uint32_t *data, const DES_key_schedule *ks1,
-                         const DES_key_schedule *ks2,
-                         const DES_key_schedule *ks3) {
+/* DES_encrypt3 is not static because it's used in decrepit. */
+void DES_encrypt3(uint32_t *data, const DES_key_schedule *ks1,
+                  const DES_key_schedule *ks2, const DES_key_schedule *ks3) {
   uint32_t l, r;
 
   l = data[0];
@@ -525,9 +525,9 @@
   data[1] = r;
 }
 
-static void DES_decrypt3(uint32_t *data, const DES_key_schedule *ks1,
-                         const DES_key_schedule *ks2,
-                         const DES_key_schedule *ks3) {
+/* DES_decrypt3 is not static because it's used in decrepit. */
+void DES_decrypt3(uint32_t *data, const DES_key_schedule *ks1,
+                  const DES_key_schedule *ks2, const DES_key_schedule *ks3) {
   uint32_t l, r;
 
   l = data[0];
diff --git a/decrepit/CMakeLists.txt b/decrepit/CMakeLists.txt
index 4365d41..a648ee5 100644
--- a/decrepit/CMakeLists.txt
+++ b/decrepit/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_subdirectory(bio)
 add_subdirectory(blowfish)
 add_subdirectory(cast)
+add_subdirectory(des)
 add_subdirectory(rsa)
 
 add_library(
@@ -9,5 +10,6 @@
   $<TARGET_OBJECTS:bio_decrepit>
   $<TARGET_OBJECTS:blowfish>
   $<TARGET_OBJECTS:cast>
+  $<TARGET_OBJECTS:des_decrepit>
   $<TARGET_OBJECTS:rsa_decrepit>
 )
diff --git a/decrepit/des/CMakeLists.txt b/decrepit/des/CMakeLists.txt
new file mode 100644
index 0000000..9ca4afb
--- /dev/null
+++ b/decrepit/des/CMakeLists.txt
@@ -0,0 +1,9 @@
+include_directories(. ../../include)
+
+add_library(
+  des_decrepit
+
+  OBJECT
+
+  cfb64ede.c
+)
diff --git a/decrepit/des/cfb64ede.c b/decrepit/des/cfb64ede.c
new file mode 100644
index 0000000..680a75a
--- /dev/null
+++ b/decrepit/des/cfb64ede.c
@@ -0,0 +1,242 @@
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]  */
+
+#include <string.h>
+
+#include <openssl/des.h>
+
+#include "../crypto/des/internal.h"
+
+
+/* defined in des.c */
+void DES_decrypt3(uint32_t *data, const DES_key_schedule *ks1,
+                  const DES_key_schedule *ks2, const DES_key_schedule *ks3);
+void DES_encrypt3(uint32_t *data, const DES_key_schedule *ks1,
+                  const DES_key_schedule *ks2, const DES_key_schedule *ks3);
+
+/* The input and output encrypted as though 64bit cfb mode is being used. The
+ * extra state information to record how much of the 64bit block we have used
+ * is contained in *num; */
+void DES_ede3_cfb64_encrypt(const uint8_t *in, uint8_t *out,
+                            long length, DES_key_schedule *ks1,
+                            DES_key_schedule *ks2, DES_key_schedule *ks3,
+                            DES_cblock *ivec, int *num, int enc) {
+  uint32_t v0, v1;
+  long l = length;
+  int n = *num;
+  uint32_t ti[2];
+  uint8_t *iv, c, cc;
+
+  iv = ivec->bytes;
+  if (enc) {
+    while (l--) {
+      if (n == 0) {
+        c2l(iv, v0);
+        c2l(iv, v1);
+
+        ti[0] = v0;
+        ti[1] = v1;
+        DES_encrypt3(ti, ks1, ks2, ks3);
+        v0 = ti[0];
+        v1 = ti[1];
+
+        iv = ivec->bytes;
+        l2c(v0, iv);
+        l2c(v1, iv);
+        iv = ivec->bytes;
+      }
+      c = *(in++) ^ iv[n];
+      *(out++) = c;
+      iv[n] = c;
+      n = (n + 1) & 0x07;
+    }
+  } else {
+    while (l--) {
+      if (n == 0) {
+        c2l(iv, v0);
+        c2l(iv, v1);
+
+        ti[0] = v0;
+        ti[1] = v1;
+        DES_encrypt3(ti, ks1, ks2, ks3);
+        v0 = ti[0];
+        v1 = ti[1];
+
+        iv = ivec->bytes;
+        l2c(v0, iv);
+        l2c(v1, iv);
+        iv = ivec->bytes;
+      }
+      cc = *(in++);
+      c = iv[n];
+      iv[n] = cc;
+      *(out++) = c ^ cc;
+      n = (n + 1) & 0x07;
+    }
+  }
+  v0 = v1 = ti[0] = ti[1] = c = cc = 0;
+  *num = n;
+}
+
+/* This is compatible with the single key CFB-r for DES, even thought that's
+ * not what EVP needs. */
+
+void DES_ede3_cfb_encrypt(const uint8_t *in, uint8_t *out, int numbits,
+                          long length, DES_key_schedule *ks1,
+                          DES_key_schedule *ks2, DES_key_schedule *ks3,
+                          DES_cblock *ivec, int enc) {
+  uint32_t d0, d1, v0, v1;
+  unsigned long l = length, n = ((unsigned int)numbits + 7) / 8;
+  int num = numbits, i;
+  uint32_t ti[2];
+  uint8_t *iv;
+  uint8_t ovec[16];
+
+  if (num > 64) {
+    return;
+  };
+
+  iv = ivec->bytes;
+  c2l(iv, v0);
+  c2l(iv, v1);
+
+  if (enc) {
+    while (l >= n) {
+      l -= n;
+      ti[0] = v0;
+      ti[1] = v1;
+      DES_encrypt3(ti, ks1, ks2, ks3);
+      c2ln(in, d0, d1, n);
+      in += n;
+      d0 ^= ti[0];
+      d1 ^= ti[1];
+      l2cn(d0, d1, out, n);
+      out += n;
+      /* 30-08-94 - eay - changed because l>>32 and l<<32 are bad under
+       * gcc :-( */
+      if (num == 32) {
+        v0 = v1;
+        v1 = d0;
+      } else if (num == 64) {
+        v0 = d0;
+        v1 = d1;
+      } else {
+        iv = &ovec[0];
+        l2c(v0, iv);
+        l2c(v1, iv);
+        l2c(d0, iv);
+        l2c(d1, iv);
+        /* shift ovec left most of the bits... */
+        memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0));
+        /* now the remaining bits */
+        if (num % 8 != 0) {
+          for (i = 0; i < 8; ++i) {
+            ovec[i] <<= num % 8;
+            ovec[i] |= ovec[i + 1] >> (8 - num % 8);
+          }
+        }
+        iv = &ovec[0];
+        c2l(iv, v0);
+        c2l(iv, v1);
+      }
+    }
+  } else {
+    while (l >= n) {
+      l -= n;
+      ti[0] = v0;
+      ti[1] = v1;
+      DES_encrypt3(ti, ks1, ks2, ks3);
+      c2ln(in, d0, d1, n);
+      in += n;
+      /* 30-08-94 - eay - changed because l>>32 and l<<32 are bad under
+       * gcc :-( */
+      if (num == 32) {
+        v0 = v1;
+        v1 = d0;
+      } else if (num == 64) {
+        v0 = d0;
+        v1 = d1;
+      } else {
+        iv = &ovec[0];
+        l2c(v0, iv);
+        l2c(v1, iv);
+        l2c(d0, iv);
+        l2c(d1, iv);
+        /* shift ovec left most of the bits... */
+        memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0));
+        /* now the remaining bits */
+        if (num % 8 != 0) {
+          for (i = 0; i < 8; ++i) {
+            ovec[i] <<= num % 8;
+            ovec[i] |= ovec[i + 1] >> (8 - num % 8);
+          }
+        }
+        iv = &ovec[0];
+        c2l(iv, v0);
+        c2l(iv, v1);
+      }
+      d0 ^= ti[0];
+      d1 ^= ti[1];
+      l2cn(d0, d1, out, n);
+      out += n;
+    }
+  }
+
+  iv = ivec->bytes;
+  l2c(v0, iv);
+  l2c(v1, iv);
+  v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0;
+}
diff --git a/include/openssl/des.h b/include/openssl/des.h
index 6e1b0cf..aa92c7b 100644
--- a/include/openssl/des.h
+++ b/include/openssl/des.h
@@ -142,6 +142,22 @@
                                          DES_cblock *ivec, int enc);
 
 
+/* Deprecated functions. */
+
+OPENSSL_EXPORT void DES_ede3_cfb64_encrypt(const uint8_t *in, uint8_t *out,
+                                           long length, DES_key_schedule *ks1,
+                                           DES_key_schedule *ks2,
+                                           DES_key_schedule *ks3,
+                                           DES_cblock *ivec, int *num, int enc);
+
+OPENSSL_EXPORT void DES_ede3_cfb_encrypt(const uint8_t *in, uint8_t *out,
+                                         int numbits, long length,
+                                         DES_key_schedule *ks1,
+                                         DES_key_schedule *ks2,
+                                         DES_key_schedule *ks3,
+                                         DES_cblock *ivec, int enc);
+
+
 #if defined(__cplusplus)
 }  /* extern C */
 #endif