diff --git a/decrepit/CMakeLists.txt b/decrepit/CMakeLists.txt
index 410d06d2..730d794f 100644
--- a/decrepit/CMakeLists.txt
+++ b/decrepit/CMakeLists.txt
@@ -5,6 +5,7 @@ add_subdirectory(des)
 add_subdirectory(dsa)
 add_subdirectory(evp)
 add_subdirectory(rc4)
+add_subdirectory(ripemd)
 add_subdirectory(rsa)
 add_subdirectory(x509)
 add_subdirectory(xts)
@@ -19,6 +20,7 @@ add_library(
   $<TARGET_OBJECTS:dsa_decrepit>
   $<TARGET_OBJECTS:evp_decrepit>
   $<TARGET_OBJECTS:rc4_decrepit>
+  $<TARGET_OBJECTS:ripemd_decrepit>
   $<TARGET_OBJECTS:rsa_decrepit>
   $<TARGET_OBJECTS:x509>
   $<TARGET_OBJECTS:xts>
diff --git a/decrepit/ripemd/CMakeLists.txt b/decrepit/ripemd/CMakeLists.txt
new file mode 100644
index 00000000..0714a8f0
--- /dev/null
+++ b/decrepit/ripemd/CMakeLists.txt
@@ -0,0 +1,21 @@
+include_directories(../../include)
+
+add_library(
+  ripemd_decrepit
+
+  OBJECT
+
+  ripemd.c
+)
+
+add_executable(
+  ripemd_test
+
+  ripemd_test.cc
+
+  $<TARGET_OBJECTS:test_support>
+)
+
+target_link_libraries(ripemd_test crypto)
+target_link_libraries(ripemd_test decrepit)
+add_dependencies(all_tests ripemd_test)
diff --git a/decrepit/ripemd/internal.h b/decrepit/ripemd/internal.h
new file mode 100644
index 00000000..c4db4b23
--- /dev/null
+++ b/decrepit/ripemd/internal.h
@@ -0,0 +1,493 @@
+/* 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.] */
+
+#ifndef OPENSSL_HEADER_BN_INTERNAL_H
+#define OPENSSL_HEADER_BN_INTERNAL_H
+
+#include <openssl/base.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+static void ripemd160_block_data_order(uint32_t h[5], const uint8_t *data,
+                                       size_t num);
+
+#define DATA_ORDER_IS_LITTLE_ENDIAN
+
+#define HASH_LONG uint32_t
+#define HASH_CTX RIPEMD160_CTX
+#define HASH_CBLOCK RIPEMD160_CBLOCK
+#define HASH_UPDATE RIPEMD160_Update
+#define HASH_TRANSFORM RIPEMD160_Transform
+#define HASH_FINAL RIPEMD160_Final
+#define HASH_MAKE_STRING(c, s) \
+  do {                         \
+    unsigned long ll;          \
+    ll = (c)->h[0];            \
+    (void)HOST_l2c(ll, (s));   \
+    ll = (c)->h[1];            \
+    (void)HOST_l2c(ll, (s));   \
+    ll = (c)->h[2];            \
+    (void)HOST_l2c(ll, (s));   \
+    ll = (c)->h[3];            \
+    (void)HOST_l2c(ll, (s));   \
+    ll = (c)->h[4];            \
+    (void)HOST_l2c(ll, (s));   \
+  } while (0)
+#define HASH_BLOCK_DATA_ORDER ripemd160_block_data_order
+
+#include "../../crypto/digest/md32_common.h"
+
+/* Transformed F2 and F4 are courtesy of Wei Dai <weidai@eskimo.com> */
+#define F1(x, y, z) ((x) ^ (y) ^ (z))
+#define F2(x, y, z) ((((y) ^ (z)) & (x)) ^ (z))
+#define F3(x, y, z) (((~(y)) | (x)) ^ (z))
+#define F4(x, y, z) ((((x) ^ (y)) & (z)) ^ (y))
+#define F5(x, y, z) (((~(z)) | (y)) ^ (x))
+
+#define RIPEMD160_A 0x67452301L
+#define RIPEMD160_B 0xEFCDAB89L
+#define RIPEMD160_C 0x98BADCFEL
+#define RIPEMD160_D 0x10325476L
+#define RIPEMD160_E 0xC3D2E1F0L
+
+#define ROTATE(a, n) (((a) << (n)) | (((a)&0xffffffff) >> (32 - (n))))
+
+#define RIP1(a, b, c, d, e, w, s) \
+  {                               \
+    a += F1(b, c, d) + X(w);      \
+    a = ROTATE(a, s) + e;         \
+    c = ROTATE(c, 10);            \
+  }
+
+#define RIP2(a, b, c, d, e, w, s, K) \
+  {                                  \
+    a += F2(b, c, d) + X(w) + K;     \
+    a = ROTATE(a, s) + e;            \
+    c = ROTATE(c, 10);               \
+  }
+
+#define RIP3(a, b, c, d, e, w, s, K) \
+  {                                  \
+    a += F3(b, c, d) + X(w) + K;     \
+    a = ROTATE(a, s) + e;            \
+    c = ROTATE(c, 10);               \
+  }
+
+#define RIP4(a, b, c, d, e, w, s, K) \
+  {                                  \
+    a += F4(b, c, d) + X(w) + K;     \
+    a = ROTATE(a, s) + e;            \
+    c = ROTATE(c, 10);               \
+  }
+
+#define RIP5(a, b, c, d, e, w, s, K) \
+  {                                  \
+    a += F5(b, c, d) + X(w) + K;     \
+    a = ROTATE(a, s) + e;            \
+    c = ROTATE(c, 10);               \
+  }
+
+#define KL0 0x00000000L
+#define KL1 0x5A827999L
+#define KL2 0x6ED9EBA1L
+#define KL3 0x8F1BBCDCL
+#define KL4 0xA953FD4EL
+
+#define KR0 0x50A28BE6L
+#define KR1 0x5C4DD124L
+#define KR2 0x6D703EF3L
+#define KR3 0x7A6D76E9L
+#define KR4 0x00000000L
+
+#define WL00  0
+#define SL00 11
+#define WL01  1
+#define SL01 14
+#define WL02  2
+#define SL02 15
+#define WL03  3
+#define SL03 12
+#define WL04  4
+#define SL04  5
+#define WL05  5
+#define SL05  8
+#define WL06  6
+#define SL06  7
+#define WL07  7
+#define SL07  9
+#define WL08  8
+#define SL08 11
+#define WL09  9
+#define SL09 13
+#define WL10 10
+#define SL10 14
+#define WL11 11
+#define SL11 15
+#define WL12 12
+#define SL12  6
+#define WL13 13
+#define SL13  7
+#define WL14 14
+#define SL14  9
+#define WL15 15
+#define SL15  8
+
+#define WL16  7
+#define SL16  7
+#define WL17  4
+#define SL17  6
+#define WL18 13
+#define SL18  8
+#define WL19  1
+#define SL19 13
+#define WL20 10
+#define SL20 11
+#define WL21  6
+#define SL21  9
+#define WL22 15
+#define SL22  7
+#define WL23  3
+#define SL23 15
+#define WL24 12
+#define SL24  7
+#define WL25  0
+#define SL25 12
+#define WL26  9
+#define SL26 15
+#define WL27  5
+#define SL27  9
+#define WL28  2
+#define SL28 11
+#define WL29 14
+#define SL29  7
+#define WL30 11
+#define SL30 13
+#define WL31  8
+#define SL31 12
+
+#define WL32  3
+#define SL32 11
+#define WL33 10
+#define SL33 13
+#define WL34 14
+#define SL34  6
+#define WL35  4
+#define SL35  7
+#define WL36  9
+#define SL36 14
+#define WL37 15
+#define SL37  9
+#define WL38  8
+#define SL38 13
+#define WL39  1
+#define SL39 15
+#define WL40  2
+#define SL40 14
+#define WL41  7
+#define SL41  8
+#define WL42  0
+#define SL42 13
+#define WL43  6
+#define SL43  6
+#define WL44 13
+#define SL44  5
+#define WL45 11
+#define SL45 12
+#define WL46  5
+#define SL46  7
+#define WL47 12
+#define SL47  5
+
+#define WL48  1
+#define SL48 11
+#define WL49  9
+#define SL49 12
+#define WL50 11
+#define SL50 14
+#define WL51 10
+#define SL51 15
+#define WL52  0
+#define SL52 14
+#define WL53  8
+#define SL53 15
+#define WL54 12
+#define SL54  9
+#define WL55  4
+#define SL55  8
+#define WL56 13
+#define SL56  9
+#define WL57  3
+#define SL57 14
+#define WL58  7
+#define SL58  5
+#define WL59 15
+#define SL59  6
+#define WL60 14
+#define SL60  8
+#define WL61  5
+#define SL61  6
+#define WL62  6
+#define SL62  5
+#define WL63  2
+#define SL63 12
+
+#define WL64  4
+#define SL64  9
+#define WL65  0
+#define SL65 15
+#define WL66  5
+#define SL66  5
+#define WL67  9
+#define SL67 11
+#define WL68  7
+#define SL68  6
+#define WL69 12
+#define SL69  8
+#define WL70  2
+#define SL70 13
+#define WL71 10
+#define SL71 12
+#define WL72 14
+#define SL72  5
+#define WL73  1
+#define SL73 12
+#define WL74  3
+#define SL74 13
+#define WL75  8
+#define SL75 14
+#define WL76 11
+#define SL76 11
+#define WL77  6
+#define SL77  8
+#define WL78 15
+#define SL78  5
+#define WL79 13
+#define SL79  6
+
+#define WR00  5
+#define SR00  8
+#define WR01 14
+#define SR01  9
+#define WR02  7
+#define SR02  9
+#define WR03  0
+#define SR03 11
+#define WR04  9
+#define SR04 13
+#define WR05  2
+#define SR05 15
+#define WR06 11
+#define SR06 15
+#define WR07  4
+#define SR07  5
+#define WR08 13
+#define SR08  7
+#define WR09  6
+#define SR09  7
+#define WR10 15
+#define SR10  8
+#define WR11  8
+#define SR11 11
+#define WR12  1
+#define SR12 14
+#define WR13 10
+#define SR13 14
+#define WR14  3
+#define SR14 12
+#define WR15 12
+#define SR15  6
+
+#define WR16  6
+#define SR16  9
+#define WR17 11
+#define SR17 13
+#define WR18  3
+#define SR18 15
+#define WR19  7
+#define SR19  7
+#define WR20  0
+#define SR20 12
+#define WR21 13
+#define SR21  8
+#define WR22  5
+#define SR22  9
+#define WR23 10
+#define SR23 11
+#define WR24 14
+#define SR24  7
+#define WR25 15
+#define SR25  7
+#define WR26  8
+#define SR26 12
+#define WR27 12
+#define SR27  7
+#define WR28  4
+#define SR28  6
+#define WR29  9
+#define SR29 15
+#define WR30  1
+#define SR30 13
+#define WR31  2
+#define SR31 11
+
+#define WR32 15
+#define SR32  9
+#define WR33  5
+#define SR33  7
+#define WR34  1
+#define SR34 15
+#define WR35  3
+#define SR35 11
+#define WR36  7
+#define SR36  8
+#define WR37 14
+#define SR37  6
+#define WR38  6
+#define SR38  6
+#define WR39  9
+#define SR39 14
+#define WR40 11
+#define SR40 12
+#define WR41  8
+#define SR41 13
+#define WR42 12
+#define SR42  5
+#define WR43  2
+#define SR43 14
+#define WR44 10
+#define SR44 13
+#define WR45  0
+#define SR45 13
+#define WR46  4
+#define SR46  7
+#define WR47 13
+#define SR47  5
+
+#define WR48  8
+#define SR48 15
+#define WR49  6
+#define SR49  5
+#define WR50  4
+#define SR50  8
+#define WR51  1
+#define SR51 11
+#define WR52  3
+#define SR52 14
+#define WR53 11
+#define SR53 14
+#define WR54 15
+#define SR54  6
+#define WR55  0
+#define SR55 14
+#define WR56  5
+#define SR56  6
+#define WR57 12
+#define SR57  9
+#define WR58  2
+#define SR58 12
+#define WR59 13
+#define SR59  9
+#define WR60  9
+#define SR60 12
+#define WR61  7
+#define SR61  5
+#define WR62 10
+#define SR62 15
+#define WR63 14
+#define SR63  8
+
+#define WR64 12
+#define SR64  8
+#define WR65 15
+#define SR65  5
+#define WR66 10
+#define SR66 12
+#define WR67  4
+#define SR67  9
+#define WR68  1
+#define SR68 12
+#define WR69  5
+#define SR69  5
+#define WR70  8
+#define SR70 14
+#define WR71  7
+#define SR71  6
+#define WR72  6
+#define SR72  8
+#define WR73  2
+#define SR73 13
+#define WR74 13
+#define SR74  6
+#define WR75 14
+#define SR75  5
+#define WR76  0
+#define SR76 15
+#define WR77  3
+#define SR77 13
+#define WR78  9
+#define SR78 11
+#define WR79 11
+#define SR79 11
+
+
+#if defined(__cplusplus)
+}  /* extern C */
+#endif
+
+#endif  /* OPENSSL_HEADER_BN_INTERNAL_H */
diff --git a/decrepit/ripemd/ripemd.c b/decrepit/ripemd/ripemd.c
new file mode 100644
index 00000000..6ed7816c
--- /dev/null
+++ b/decrepit/ripemd/ripemd.c
@@ -0,0 +1,324 @@
+/* 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 <openssl/ripemd.h>
+
+#include <string.h>
+
+#include "internal.h"
+
+
+int RIPEMD160_Init(RIPEMD160_CTX *ctx) {
+  memset(ctx, 0, sizeof(*ctx));
+  ctx->h[0] = RIPEMD160_A;
+  ctx->h[1] = RIPEMD160_B;
+  ctx->h[2] = RIPEMD160_C;
+  ctx->h[3] = RIPEMD160_D;
+  ctx->h[4] = RIPEMD160_E;
+  return 1;
+}
+
+static void ripemd160_block_data_order(uint32_t h[5], const uint8_t *data,
+                                       size_t num) {
+  uint32_t A, B, C, D, E;
+  uint32_t a, b, c, d, e, l;
+  uint32_t XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7, XX8, XX9, XX10, XX11, XX12,
+      XX13, XX14, XX15;
+#define X(i) XX##i
+
+  for (; num--;) {
+    A = h[0];
+    B = h[1];
+    C = h[2];
+    D = h[3];
+    E = h[4];
+
+    (void)HOST_c2l(data, l);
+    X(0) = l;
+    (void)HOST_c2l(data, l);
+    X(1) = l;
+    RIP1(A, B, C, D, E, WL00, SL00);
+    (void)HOST_c2l(data, l);
+    X(2) = l;
+    RIP1(E, A, B, C, D, WL01, SL01);
+    (void)HOST_c2l(data, l);
+    X(3) = l;
+    RIP1(D, E, A, B, C, WL02, SL02);
+    (void)HOST_c2l(data, l);
+    X(4) = l;
+    RIP1(C, D, E, A, B, WL03, SL03);
+    (void)HOST_c2l(data, l);
+    X(5) = l;
+    RIP1(B, C, D, E, A, WL04, SL04);
+    (void)HOST_c2l(data, l);
+    X(6) = l;
+    RIP1(A, B, C, D, E, WL05, SL05);
+    (void)HOST_c2l(data, l);
+    X(7) = l;
+    RIP1(E, A, B, C, D, WL06, SL06);
+    (void)HOST_c2l(data, l);
+    X(8) = l;
+    RIP1(D, E, A, B, C, WL07, SL07);
+    (void)HOST_c2l(data, l);
+    X(9) = l;
+    RIP1(C, D, E, A, B, WL08, SL08);
+    (void)HOST_c2l(data, l);
+    X(10) = l;
+    RIP1(B, C, D, E, A, WL09, SL09);
+    (void)HOST_c2l(data, l);
+    X(11) = l;
+    RIP1(A, B, C, D, E, WL10, SL10);
+    (void)HOST_c2l(data, l);
+    X(12) = l;
+    RIP1(E, A, B, C, D, WL11, SL11);
+    (void)HOST_c2l(data, l);
+    X(13) = l;
+    RIP1(D, E, A, B, C, WL12, SL12);
+    (void)HOST_c2l(data, l);
+    X(14) = l;
+    RIP1(C, D, E, A, B, WL13, SL13);
+    (void)HOST_c2l(data, l);
+    X(15) = l;
+    RIP1(B, C, D, E, A, WL14, SL14);
+    RIP1(A, B, C, D, E, WL15, SL15);
+
+    RIP2(E, A, B, C, D, WL16, SL16, KL1);
+    RIP2(D, E, A, B, C, WL17, SL17, KL1);
+    RIP2(C, D, E, A, B, WL18, SL18, KL1);
+    RIP2(B, C, D, E, A, WL19, SL19, KL1);
+    RIP2(A, B, C, D, E, WL20, SL20, KL1);
+    RIP2(E, A, B, C, D, WL21, SL21, KL1);
+    RIP2(D, E, A, B, C, WL22, SL22, KL1);
+    RIP2(C, D, E, A, B, WL23, SL23, KL1);
+    RIP2(B, C, D, E, A, WL24, SL24, KL1);
+    RIP2(A, B, C, D, E, WL25, SL25, KL1);
+    RIP2(E, A, B, C, D, WL26, SL26, KL1);
+    RIP2(D, E, A, B, C, WL27, SL27, KL1);
+    RIP2(C, D, E, A, B, WL28, SL28, KL1);
+    RIP2(B, C, D, E, A, WL29, SL29, KL1);
+    RIP2(A, B, C, D, E, WL30, SL30, KL1);
+    RIP2(E, A, B, C, D, WL31, SL31, KL1);
+
+    RIP3(D, E, A, B, C, WL32, SL32, KL2);
+    RIP3(C, D, E, A, B, WL33, SL33, KL2);
+    RIP3(B, C, D, E, A, WL34, SL34, KL2);
+    RIP3(A, B, C, D, E, WL35, SL35, KL2);
+    RIP3(E, A, B, C, D, WL36, SL36, KL2);
+    RIP3(D, E, A, B, C, WL37, SL37, KL2);
+    RIP3(C, D, E, A, B, WL38, SL38, KL2);
+    RIP3(B, C, D, E, A, WL39, SL39, KL2);
+    RIP3(A, B, C, D, E, WL40, SL40, KL2);
+    RIP3(E, A, B, C, D, WL41, SL41, KL2);
+    RIP3(D, E, A, B, C, WL42, SL42, KL2);
+    RIP3(C, D, E, A, B, WL43, SL43, KL2);
+    RIP3(B, C, D, E, A, WL44, SL44, KL2);
+    RIP3(A, B, C, D, E, WL45, SL45, KL2);
+    RIP3(E, A, B, C, D, WL46, SL46, KL2);
+    RIP3(D, E, A, B, C, WL47, SL47, KL2);
+
+    RIP4(C, D, E, A, B, WL48, SL48, KL3);
+    RIP4(B, C, D, E, A, WL49, SL49, KL3);
+    RIP4(A, B, C, D, E, WL50, SL50, KL3);
+    RIP4(E, A, B, C, D, WL51, SL51, KL3);
+    RIP4(D, E, A, B, C, WL52, SL52, KL3);
+    RIP4(C, D, E, A, B, WL53, SL53, KL3);
+    RIP4(B, C, D, E, A, WL54, SL54, KL3);
+    RIP4(A, B, C, D, E, WL55, SL55, KL3);
+    RIP4(E, A, B, C, D, WL56, SL56, KL3);
+    RIP4(D, E, A, B, C, WL57, SL57, KL3);
+    RIP4(C, D, E, A, B, WL58, SL58, KL3);
+    RIP4(B, C, D, E, A, WL59, SL59, KL3);
+    RIP4(A, B, C, D, E, WL60, SL60, KL3);
+    RIP4(E, A, B, C, D, WL61, SL61, KL3);
+    RIP4(D, E, A, B, C, WL62, SL62, KL3);
+    RIP4(C, D, E, A, B, WL63, SL63, KL3);
+
+    RIP5(B, C, D, E, A, WL64, SL64, KL4);
+    RIP5(A, B, C, D, E, WL65, SL65, KL4);
+    RIP5(E, A, B, C, D, WL66, SL66, KL4);
+    RIP5(D, E, A, B, C, WL67, SL67, KL4);
+    RIP5(C, D, E, A, B, WL68, SL68, KL4);
+    RIP5(B, C, D, E, A, WL69, SL69, KL4);
+    RIP5(A, B, C, D, E, WL70, SL70, KL4);
+    RIP5(E, A, B, C, D, WL71, SL71, KL4);
+    RIP5(D, E, A, B, C, WL72, SL72, KL4);
+    RIP5(C, D, E, A, B, WL73, SL73, KL4);
+    RIP5(B, C, D, E, A, WL74, SL74, KL4);
+    RIP5(A, B, C, D, E, WL75, SL75, KL4);
+    RIP5(E, A, B, C, D, WL76, SL76, KL4);
+    RIP5(D, E, A, B, C, WL77, SL77, KL4);
+    RIP5(C, D, E, A, B, WL78, SL78, KL4);
+    RIP5(B, C, D, E, A, WL79, SL79, KL4);
+
+    a = A;
+    b = B;
+    c = C;
+    d = D;
+    e = E;
+    /* Do other half */
+    A = h[0];
+    B = h[1];
+    C = h[2];
+    D = h[3];
+    E = h[4];
+
+    RIP5(A, B, C, D, E, WR00, SR00, KR0);
+    RIP5(E, A, B, C, D, WR01, SR01, KR0);
+    RIP5(D, E, A, B, C, WR02, SR02, KR0);
+    RIP5(C, D, E, A, B, WR03, SR03, KR0);
+    RIP5(B, C, D, E, A, WR04, SR04, KR0);
+    RIP5(A, B, C, D, E, WR05, SR05, KR0);
+    RIP5(E, A, B, C, D, WR06, SR06, KR0);
+    RIP5(D, E, A, B, C, WR07, SR07, KR0);
+    RIP5(C, D, E, A, B, WR08, SR08, KR0);
+    RIP5(B, C, D, E, A, WR09, SR09, KR0);
+    RIP5(A, B, C, D, E, WR10, SR10, KR0);
+    RIP5(E, A, B, C, D, WR11, SR11, KR0);
+    RIP5(D, E, A, B, C, WR12, SR12, KR0);
+    RIP5(C, D, E, A, B, WR13, SR13, KR0);
+    RIP5(B, C, D, E, A, WR14, SR14, KR0);
+    RIP5(A, B, C, D, E, WR15, SR15, KR0);
+
+    RIP4(E, A, B, C, D, WR16, SR16, KR1);
+    RIP4(D, E, A, B, C, WR17, SR17, KR1);
+    RIP4(C, D, E, A, B, WR18, SR18, KR1);
+    RIP4(B, C, D, E, A, WR19, SR19, KR1);
+    RIP4(A, B, C, D, E, WR20, SR20, KR1);
+    RIP4(E, A, B, C, D, WR21, SR21, KR1);
+    RIP4(D, E, A, B, C, WR22, SR22, KR1);
+    RIP4(C, D, E, A, B, WR23, SR23, KR1);
+    RIP4(B, C, D, E, A, WR24, SR24, KR1);
+    RIP4(A, B, C, D, E, WR25, SR25, KR1);
+    RIP4(E, A, B, C, D, WR26, SR26, KR1);
+    RIP4(D, E, A, B, C, WR27, SR27, KR1);
+    RIP4(C, D, E, A, B, WR28, SR28, KR1);
+    RIP4(B, C, D, E, A, WR29, SR29, KR1);
+    RIP4(A, B, C, D, E, WR30, SR30, KR1);
+    RIP4(E, A, B, C, D, WR31, SR31, KR1);
+
+    RIP3(D, E, A, B, C, WR32, SR32, KR2);
+    RIP3(C, D, E, A, B, WR33, SR33, KR2);
+    RIP3(B, C, D, E, A, WR34, SR34, KR2);
+    RIP3(A, B, C, D, E, WR35, SR35, KR2);
+    RIP3(E, A, B, C, D, WR36, SR36, KR2);
+    RIP3(D, E, A, B, C, WR37, SR37, KR2);
+    RIP3(C, D, E, A, B, WR38, SR38, KR2);
+    RIP3(B, C, D, E, A, WR39, SR39, KR2);
+    RIP3(A, B, C, D, E, WR40, SR40, KR2);
+    RIP3(E, A, B, C, D, WR41, SR41, KR2);
+    RIP3(D, E, A, B, C, WR42, SR42, KR2);
+    RIP3(C, D, E, A, B, WR43, SR43, KR2);
+    RIP3(B, C, D, E, A, WR44, SR44, KR2);
+    RIP3(A, B, C, D, E, WR45, SR45, KR2);
+    RIP3(E, A, B, C, D, WR46, SR46, KR2);
+    RIP3(D, E, A, B, C, WR47, SR47, KR2);
+
+    RIP2(C, D, E, A, B, WR48, SR48, KR3);
+    RIP2(B, C, D, E, A, WR49, SR49, KR3);
+    RIP2(A, B, C, D, E, WR50, SR50, KR3);
+    RIP2(E, A, B, C, D, WR51, SR51, KR3);
+    RIP2(D, E, A, B, C, WR52, SR52, KR3);
+    RIP2(C, D, E, A, B, WR53, SR53, KR3);
+    RIP2(B, C, D, E, A, WR54, SR54, KR3);
+    RIP2(A, B, C, D, E, WR55, SR55, KR3);
+    RIP2(E, A, B, C, D, WR56, SR56, KR3);
+    RIP2(D, E, A, B, C, WR57, SR57, KR3);
+    RIP2(C, D, E, A, B, WR58, SR58, KR3);
+    RIP2(B, C, D, E, A, WR59, SR59, KR3);
+    RIP2(A, B, C, D, E, WR60, SR60, KR3);
+    RIP2(E, A, B, C, D, WR61, SR61, KR3);
+    RIP2(D, E, A, B, C, WR62, SR62, KR3);
+    RIP2(C, D, E, A, B, WR63, SR63, KR3);
+
+    RIP1(B, C, D, E, A, WR64, SR64);
+    RIP1(A, B, C, D, E, WR65, SR65);
+    RIP1(E, A, B, C, D, WR66, SR66);
+    RIP1(D, E, A, B, C, WR67, SR67);
+    RIP1(C, D, E, A, B, WR68, SR68);
+    RIP1(B, C, D, E, A, WR69, SR69);
+    RIP1(A, B, C, D, E, WR70, SR70);
+    RIP1(E, A, B, C, D, WR71, SR71);
+    RIP1(D, E, A, B, C, WR72, SR72);
+    RIP1(C, D, E, A, B, WR73, SR73);
+    RIP1(B, C, D, E, A, WR74, SR74);
+    RIP1(A, B, C, D, E, WR75, SR75);
+    RIP1(E, A, B, C, D, WR76, SR76);
+    RIP1(D, E, A, B, C, WR77, SR77);
+    RIP1(C, D, E, A, B, WR78, SR78);
+    RIP1(B, C, D, E, A, WR79, SR79);
+
+    D = h[1] + c + D;
+    h[1] = h[2] + d + E;
+    h[2] = h[3] + e + A;
+    h[3] = h[4] + a + B;
+    h[4] = h[0] + b + C;
+    h[0] = D;
+  }
+
+#undef X
+}
+
+uint8_t *RIPEMD160(const uint8_t *data, size_t len, unsigned char *out) {
+  RIPEMD160_CTX ctx;
+
+  if (!RIPEMD160_Init(&ctx)) {
+    return NULL;
+  }
+
+  RIPEMD160_Update(&ctx, data, len);
+  RIPEMD160_Final(out, &ctx);
+  return out;
+}
diff --git a/decrepit/ripemd/ripemd_test.cc b/decrepit/ripemd/ripemd_test.cc
new file mode 100644
index 00000000..ebcabdfb
--- /dev/null
+++ b/decrepit/ripemd/ripemd_test.cc
@@ -0,0 +1,119 @@
+/* Copyright (c) 2016, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <openssl/ripemd.h>
+
+#include <memory>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "../../crypto/test/test_util.h"
+
+
+struct RIPEMDTestCase {
+  const char *input;
+  uint8_t expected[RIPEMD160_DIGEST_LENGTH];
+};
+
+static const RIPEMDTestCase kRIPEMDTestCases[] = {
+    {"", {0x9c, 0x11, 0x85, 0xa5, 0xc5, 0xe9, 0xfc, 0x54, 0x61, 0x28,
+          0x08, 0x97, 0x7e, 0xe8, 0xf5, 0x48, 0xb2, 0x25, 0x8d, 0x31}},
+    {"a", {0x0b, 0xdc, 0x9d, 0x2d, 0x25, 0x6b, 0x3e, 0xe9, 0xda, 0xae,
+           0x34, 0x7b, 0xe6, 0xf4, 0xdc, 0x83, 0x5a, 0x46, 0x7f, 0xfe}},
+    {"abc", {0x8e, 0xb2, 0x08, 0xf7, 0xe0, 0x5d, 0x98, 0x7a, 0x9b, 0x04,
+             0x4a, 0x8e, 0x98, 0xc6, 0xb0, 0x87, 0xf1, 0x5a, 0x0b, 0xfc}},
+    {"message digest",
+     {0x5d, 0x06, 0x89, 0xef, 0x49, 0xd2, 0xfa, 0xe5, 0x72, 0xb8,
+      0x81, 0xb1, 0x23, 0xa8, 0x5f, 0xfa, 0x21, 0x59, 0x5f, 0x36}},
+    {"abcdefghijklmnopqrstuvwxyz",
+     {0xf7, 0x1c, 0x27, 0x10, 0x9c, 0x69, 0x2c, 0x1b, 0x56, 0xbb,
+      0xdc, 0xeb, 0x5b, 0x9d, 0x28, 0x65, 0xb3, 0x70, 0x8d, 0xbc}},
+    {"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+     {0x12, 0xa0, 0x53, 0x38, 0x4a, 0x9c, 0x0c, 0x88, 0xe4, 0x05,
+      0xa0, 0x6c, 0x27, 0xdc, 0xf4, 0x9a, 0xda, 0x62, 0xeb, 0x2b}},
+    {"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+     {0xb0, 0xe2, 0x0b, 0x6e, 0x31, 0x16, 0x64, 0x02, 0x86, 0xed,
+      0x3a, 0x87, 0xa5, 0x71, 0x30, 0x79, 0xb2, 0x1f, 0x51, 0x89}},
+    {"1234567890123456789012345678901234567890123456789012345678901234567890123"
+     "4567890",
+     {0x9b, 0x75, 0x2e, 0x45, 0x57, 0x3d, 0x4b, 0x39, 0xf4, 0xdb,
+      0xd3, 0x32, 0x3c, 0xab, 0x82, 0xbf, 0x63, 0x32, 0x6b, 0xfb}},
+};
+
+int main(void) {
+  unsigned test_num = 0;
+  int ok = 1;
+
+  for (const auto &test : kRIPEMDTestCases) {
+    test_num++;
+
+    const size_t input_len = strlen(test.input);
+
+    for (size_t stride = 0; stride <= input_len; stride++) {
+      uint8_t digest[RIPEMD160_DIGEST_LENGTH];
+
+      if (stride == 0) {
+        RIPEMD160(reinterpret_cast<const uint8_t *>(test.input), input_len,
+                  digest);
+      } else {
+        RIPEMD160_CTX ctx;
+        RIPEMD160_Init(&ctx);
+
+        for (size_t done = 0; done < input_len;) {
+          const size_t remaining = input_len - done;
+          size_t todo = stride;
+          if (todo > remaining) {
+            todo = remaining;
+          }
+
+          RIPEMD160_Update(&ctx, &test.input[done], todo);
+          done += todo;
+        }
+
+        RIPEMD160_Final(digest, &ctx);
+      }
+
+      if (memcmp(digest, test.expected, sizeof(digest)) != 0) {
+        fprintf(stderr, "#%u: bad result with stride %u: ", test_num,
+                static_cast<unsigned>(stride));
+        hexdump(stderr, "", digest, sizeof(digest));
+        ok = 0;
+      }
+    }
+  }
+
+  static const size_t kLargeBufSize = 1000000;
+  std::unique_ptr<uint8_t[]> buf(new uint8_t[kLargeBufSize]);
+  memset(buf.get(), 'a', kLargeBufSize);
+  uint8_t digest[RIPEMD160_DIGEST_LENGTH];
+  RIPEMD160(buf.get(), kLargeBufSize, digest);
+
+  static const uint8_t kMillionADigest[RIPEMD160_DIGEST_LENGTH] = {
+      0x52, 0x78, 0x32, 0x43, 0xc1, 0x69, 0x7b, 0xdb, 0xe1, 0x6d,
+      0x37, 0xf9, 0x7f, 0x68, 0xf0, 0x83, 0x25, 0xdc, 0x15, 0x28};
+
+  if (memcmp(digest, kMillionADigest, sizeof(digest)) != 0) {
+    fprintf(stderr, "Digest incorrect for “million a's” test: ");
+    hexdump(stderr, "", digest, sizeof(digest));
+    ok = 0;
+  }
+
+  if (!ok) {
+    return 1;
+  }
+
+  printf("PASS\n");
+  return 0;
+}
diff --git a/include/openssl/base.h b/include/openssl/base.h
index 8507f372..b685ec3f 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -182,6 +182,7 @@ typedef struct Netscape_spki_st NETSCAPE_SPKI;
 typedef struct PBE2PARAM_st PBE2PARAM;
 typedef struct PBEPARAM_st PBEPARAM;
 typedef struct PBKDF2PARAM_st PBKDF2PARAM;
+typedef struct RIPEMD160state_st RIPEMD160_CTX;
 typedef struct X509_POLICY_CACHE_st X509_POLICY_CACHE;
 typedef struct X509_POLICY_LEVEL_st X509_POLICY_LEVEL;
 typedef struct X509_POLICY_NODE_st X509_POLICY_NODE;
diff --git a/include/openssl/ripemd.h b/include/openssl/ripemd.h
new file mode 100644
index 00000000..cf1e49e2
--- /dev/null
+++ b/include/openssl/ripemd.h
@@ -0,0 +1,107 @@
+/* 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.] */
+
+#ifndef OPENSSL_HEADER_RIPEMD_H
+#define OPENSSL_HEADER_RIPEMD_H
+
+#include <openssl/base.h>
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+
+# define RIPEMD160_CBLOCK        64
+# define RIPEMD160_LBLOCK        (RIPEMD160_CBLOCK/4)
+# define RIPEMD160_DIGEST_LENGTH 20
+
+struct RIPEMD160state_st {
+  uint32_t h[5];
+  uint32_t Nl, Nh;
+  uint8_t data[RIPEMD160_CBLOCK];
+  unsigned num;
+};
+
+/* RIPEMD160_Init initialises |ctx| and returns one. */
+OPENSSL_EXPORT int RIPEMD160_Init(RIPEMD160_CTX *ctx);
+
+/* RIPEMD160_Update adds |len| bytes from |data| to |ctx| and returns one. */
+OPENSSL_EXPORT int RIPEMD160_Update(RIPEMD160_CTX *ctx, const void *data,
+                                   size_t len);
+
+/* RIPEMD160_Final adds the final padding to |ctx| and writes the resulting
+ * digest to |md|, which must have at least |RIPEMD160_DIGEST_LENGTH| bytes of
+ * space. It returns one. */
+OPENSSL_EXPORT int RIPEMD160_Final(uint8_t *md, RIPEMD160_CTX *ctx);
+
+/* RIPEMD160 writes the digest of |len| bytes from |data| to |out| and returns
+ * |out|. There must be at least |RIPEMD160_DIGEST_LENGTH| bytes of space in
+ * |out|. */
+OPENSSL_EXPORT uint8_t *RIPEMD160(const uint8_t *data, size_t len,
+                                  uint8_t *out);
+
+/* RIPEMD160_Transform is a low-level function that performs a single,
+ * RIPEMD160 block transformation using the state from |ctx| and 64 bytes from
+ * |block|. */
+OPENSSL_EXPORT void RIPEMD160_Transform(RIPEMD160_CTX *ctx,
+                                        const uint8_t *block);
+
+
+#if defined(__cplusplus)
+}  /* extern C */
+#endif
+
+#endif  /* OPENSSL_HEADER_RIPEMD_H */