diff --git a/src/modules/module_23911.c b/src/modules/module_23911.c
new file mode 100644
index 000000000..b014bac33
--- /dev/null
+++ b/src/modules/module_23911.c
@@ -0,0 +1,388 @@
+/**
+ * Author......: See docs/credits.txt
+ * License.....: MIT
+ */
+
+#include "common.h"
+#include "types.h"
+#include "modules.h"
+#include "bitops.h"
+#include "convert.h"
+#include "shared.h"
+
+static const u32   ATTACK_EXEC    = ATTACK_EXEC_OUTSIDE_KERNEL;
+
+static const u32   DGST_POS0      = 0;
+static const u32   DGST_POS1      = 1;
+static const u32   DGST_POS2      = 2;
+static const u32   DGST_POS3      = 3;
+static const u32   DGST_SIZE      = DGST_SIZE_4_64;
+static const u32   HASH_CATEGORY  = HASH_CATEGORY_NETWORK_SERVER;
+static const char *HASH_NAME      = "RedHat 389-DS LDAP (PBKDF2-HMAC-SHA256)";
+static const u64   KERN_TYPE      = 10900;
+static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE
+                                  | OPTI_TYPE_SLOW_HASH_SIMD_LOOP;
+static const u64   OPTS_TYPE      = OPTS_TYPE_PT_GENERATE_LE;
+static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
+static const char *ST_PASS        = "hashcat";
+static const char *ST_HASH        = "{PBKDF2_SHA256}AACkEGhlaiBqZW5z/jtuSox0CrtV9SHiVFjYeHpQ/ki2kwDrQeSqiiTn8LOmpPCw3r6TK/JDfl+ZAXRoc3VidGxldHllIXuxBDl6ItQOMupkRn+hzi/LEdr62a7B9sNOo8BPL9Z2nOi/m9AI+nAd/qwpLD1fbeDgs2DdpCZ4QfljuCLRBdURZV3HcXDUjD7PZ1CQcIOv9VbFlbu0IBmiU7ccMyb/qoxi+rPMqE4U8f6hL0TQjTjlOzU9MpPYS+WfztpYy7lEN6QghhOz0xe+0y2rDoK+yCS4PykkNS4FFc+xeiT6SNy3r7m+0teyaQKOExLrjogWkj+t+e4bMpHNx/FL3jkjCsuZnhq/t8eshG9DKmeD9b/QMkqT8dxe0jmr0s4+GnmHpMQMAxYW3pg70TluiDp3kJrDr1/d8OQerkQRevNx";
+
+static const u32   HASH_LEN_RAW   = 256;
+static const u32   SALT_LEN_RAW   = 64;
+static const u32   ITER_LEN_RAW   = 4;
+
+u32         module_attack_exec    (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ATTACK_EXEC;     }
+u32         module_dgst_pos0      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS0;       }
+u32         module_dgst_pos1      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS1;       }
+u32         module_dgst_pos2      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS2;       }
+u32         module_dgst_pos3      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS3;       }
+u32         module_dgst_size      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_SIZE;       }
+u32         module_hash_category  (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_CATEGORY;   }
+const char *module_hash_name      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_NAME;       }
+u64         module_kern_type      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return KERN_TYPE;       }
+u32         module_opti_type      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTI_TYPE;       }
+u64         module_opts_type      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTS_TYPE;       }
+u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return SALT_TYPE;       }
+const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
+const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
+
+typedef struct pbkdf2_sha256
+{
+  u32 salt_buf[64];
+
+} pbkdf2_sha256_t;
+
+typedef struct pbkdf2_sha256_tmp
+{
+  u32  ipad[8];
+  u32  opad[8];
+
+  u32  dgst[32];
+  u32  out[32];
+
+} pbkdf2_sha256_tmp_t;
+
+static const char *SIGNATURE_REDHAT_PBKDF2_SHA256 = "{PBKDF2_SHA256}";
+
+u64 module_esalt_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
+{
+  const u64 esalt_size = (const u64) sizeof (pbkdf2_sha256_t);
+
+  return esalt_size;
+}
+
+u64 module_tmp_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
+{
+  const u64 tmp_size = (const u64) sizeof (pbkdf2_sha256_tmp_t);
+
+  return tmp_size;
+}
+
+u32 module_pw_max (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
+{
+  const u32 pw_max = PW_MAX;
+
+  return pw_max;
+}
+
+int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
+{
+  u32 *digest = (u32 *) digest_buf;
+
+  pbkdf2_sha256_t *pbkdf2_sha256 = (pbkdf2_sha256_t *) esalt_buf;
+
+  token_t token;
+
+  token.token_cnt  = 2;
+
+  token.signatures_cnt    = 1;
+  token.signatures_buf[0] = SIGNATURE_REDHAT_PBKDF2_SHA256;
+
+  //length of signature
+  token.len[0]     = 15;
+  token.attr[0]    = TOKEN_ATTR_FIXED_LENGTH
+                   | TOKEN_ATTR_VERIFY_SIGNATURE;
+
+  //length of base64 encoded hash
+  token.len_min[1] = 432;
+  token.len_max[1] = 432;
+
+  token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH
+                   | TOKEN_ATTR_VERIFY_BASE64A;
+
+  const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
+
+  if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
+
+  //read hash into tmp_buf
+
+  const u8 *tmp_pos = token.buf[1];
+  const int tmp_len = token.len[1];
+
+  u8 tmp_buf[324];
+
+  memset (tmp_buf, 0, sizeof (tmp_buf));
+
+  const int base64_decode_len = base64_decode (base64_to_int, tmp_pos, tmp_len, tmp_buf);
+
+  if (base64_decode_len != (4 + 64 + 256)) return (PARSER_HASH_LENGTH);
+
+  // iter
+
+  u8 *iter_pos = tmp_buf;
+
+  uint32_t iters[4] = {0};
+
+  memcpy (iters, iter_pos, ITER_LEN_RAW);
+
+  // implementation does a ntohl(*iters)
+  salt->salt_iter = byte_swap_32(*iters) - 1;
+
+  // salt
+
+  u8 *salt_pos = tmp_buf + ITER_LEN_RAW;
+
+  salt->salt_len  = SALT_LEN_RAW;
+
+  u8 *salt_buf_ptr = (u8 *) pbkdf2_sha256->salt_buf;
+  memcpy (salt_buf_ptr, salt_pos, SALT_LEN_RAW);
+
+  // hash
+
+  u8 *hash_pos = tmp_buf + ITER_LEN_RAW + SALT_LEN_RAW;
+  memcpy(digest, hash_pos, HASH_LEN_RAW);
+
+  digest[0] = byte_swap_32 (digest[0]);
+  digest[1] = byte_swap_32 (digest[1]);
+  digest[2] = byte_swap_32 (digest[2]);
+  digest[3] = byte_swap_32 (digest[3]);
+  digest[4] = byte_swap_32 (digest[4]);
+  digest[5] = byte_swap_32 (digest[5]);
+  digest[6] = byte_swap_32 (digest[6]);
+  digest[7] = byte_swap_32 (digest[7]);
+  digest[8] = byte_swap_32 (digest[8]);
+  digest[9] = byte_swap_32 (digest[9]);
+  digest[10] = byte_swap_32 (digest[10]);
+  digest[11] = byte_swap_32 (digest[11]);
+  digest[12] = byte_swap_32 (digest[12]);
+  digest[13] = byte_swap_32 (digest[13]);
+  digest[14] = byte_swap_32 (digest[14]);
+  digest[15] = byte_swap_32 (digest[15]);
+  digest[16] = byte_swap_32 (digest[16]);
+  digest[17] = byte_swap_32 (digest[17]);
+  digest[18] = byte_swap_32 (digest[18]);
+  digest[19] = byte_swap_32 (digest[19]);
+  digest[20] = byte_swap_32 (digest[20]);
+  digest[21] = byte_swap_32 (digest[21]);
+  digest[22] = byte_swap_32 (digest[22]);
+  digest[23] = byte_swap_32 (digest[23]);
+  digest[24] = byte_swap_32 (digest[24]);
+  digest[25] = byte_swap_32 (digest[25]);
+  digest[26] = byte_swap_32 (digest[26]);
+  digest[27] = byte_swap_32 (digest[27]);
+  digest[28] = byte_swap_32 (digest[28]);
+  digest[29] = byte_swap_32 (digest[29]);
+  digest[30] = byte_swap_32 (digest[30]);
+  digest[31] = byte_swap_32 (digest[31]);
+  digest[32] = byte_swap_32 (digest[32]);
+  digest[33] = byte_swap_32 (digest[33]);
+  digest[34] = byte_swap_32 (digest[34]);
+  digest[35] = byte_swap_32 (digest[35]);
+  digest[36] = byte_swap_32 (digest[36]);
+  digest[37] = byte_swap_32 (digest[37]);
+  digest[38] = byte_swap_32 (digest[38]);
+  digest[39] = byte_swap_32 (digest[39]);
+  digest[40] = byte_swap_32 (digest[40]);
+  digest[41] = byte_swap_32 (digest[41]);
+  digest[42] = byte_swap_32 (digest[42]);
+  digest[43] = byte_swap_32 (digest[43]);
+  digest[44] = byte_swap_32 (digest[44]);
+  digest[45] = byte_swap_32 (digest[45]);
+  digest[46] = byte_swap_32 (digest[46]);
+  digest[47] = byte_swap_32 (digest[47]);
+  digest[48] = byte_swap_32 (digest[48]);
+  digest[49] = byte_swap_32 (digest[49]);
+  digest[50] = byte_swap_32 (digest[50]);
+  digest[51] = byte_swap_32 (digest[51]);
+  digest[52] = byte_swap_32 (digest[52]);
+  digest[53] = byte_swap_32 (digest[53]);
+  digest[54] = byte_swap_32 (digest[54]);
+  digest[55] = byte_swap_32 (digest[55]);
+  digest[56] = byte_swap_32 (digest[56]);
+  digest[57] = byte_swap_32 (digest[57]);
+  digest[58] = byte_swap_32 (digest[58]);
+  digest[59] = byte_swap_32 (digest[59]);
+  digest[60] = byte_swap_32 (digest[60]);
+  digest[61] = byte_swap_32 (digest[61]);
+  digest[62] = byte_swap_32 (digest[62]);
+  digest[63] = byte_swap_32 (digest[63]);
+
+  return (PARSER_OK);
+}
+
+int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const void *digest_buf, MAYBE_UNUSED const salt_t *salt, MAYBE_UNUSED const void *esalt_buf, MAYBE_UNUSED const void *hook_salt_buf, MAYBE_UNUSED const hashinfo_t *hash_info, char *line_buf, MAYBE_UNUSED const int line_size)
+{
+  const u32 *digest = (const u32 *) digest_buf;
+
+  const pbkdf2_sha256_t *pbkdf2_sha256 = (pbkdf2_sha256_t *) esalt_buf;
+
+  u32 tmp_digest[64];
+  tmp_digest[0] = byte_swap_32 (digest[0]);
+  tmp_digest[1] = byte_swap_32 (digest[1]);
+  tmp_digest[2] = byte_swap_32 (digest[2]);
+  tmp_digest[3] = byte_swap_32 (digest[3]);
+  tmp_digest[4] = byte_swap_32 (digest[4]);
+  tmp_digest[5] = byte_swap_32 (digest[5]);
+  tmp_digest[6] = byte_swap_32 (digest[6]);
+  tmp_digest[7] = byte_swap_32 (digest[7]);
+  tmp_digest[8] = byte_swap_32 (digest[8]);
+  tmp_digest[9] = byte_swap_32 (digest[9]);
+  tmp_digest[10] = byte_swap_32 (digest[10]);
+  tmp_digest[11] = byte_swap_32 (digest[11]);
+  tmp_digest[12] = byte_swap_32 (digest[12]);
+  tmp_digest[13] = byte_swap_32 (digest[13]);
+  tmp_digest[14] = byte_swap_32 (digest[14]);
+  tmp_digest[15] = byte_swap_32 (digest[15]);
+  tmp_digest[16] = byte_swap_32 (digest[16]);
+  tmp_digest[17] = byte_swap_32 (digest[17]);
+  tmp_digest[18] = byte_swap_32 (digest[18]);
+  tmp_digest[19] = byte_swap_32 (digest[19]);
+  tmp_digest[20] = byte_swap_32 (digest[20]);
+  tmp_digest[21] = byte_swap_32 (digest[21]);
+  tmp_digest[22] = byte_swap_32 (digest[22]);
+  tmp_digest[23] = byte_swap_32 (digest[23]);
+  tmp_digest[24] = byte_swap_32 (digest[24]);
+  tmp_digest[25] = byte_swap_32 (digest[25]);
+  tmp_digest[26] = byte_swap_32 (digest[26]);
+  tmp_digest[27] = byte_swap_32 (digest[27]);
+  tmp_digest[28] = byte_swap_32 (digest[28]);
+  tmp_digest[29] = byte_swap_32 (digest[29]);
+  tmp_digest[30] = byte_swap_32 (digest[30]);
+  tmp_digest[31] = byte_swap_32 (digest[31]);
+  tmp_digest[32] = byte_swap_32 (digest[32]);
+  tmp_digest[33] = byte_swap_32 (digest[33]);
+  tmp_digest[34] = byte_swap_32 (digest[34]);
+  tmp_digest[35] = byte_swap_32 (digest[35]);
+  tmp_digest[36] = byte_swap_32 (digest[36]);
+  tmp_digest[37] = byte_swap_32 (digest[37]);
+  tmp_digest[38] = byte_swap_32 (digest[38]);
+  tmp_digest[39] = byte_swap_32 (digest[39]);
+  tmp_digest[40] = byte_swap_32 (digest[40]);
+  tmp_digest[41] = byte_swap_32 (digest[41]);
+  tmp_digest[42] = byte_swap_32 (digest[42]);
+  tmp_digest[43] = byte_swap_32 (digest[43]);
+  tmp_digest[44] = byte_swap_32 (digest[44]);
+  tmp_digest[45] = byte_swap_32 (digest[45]);
+  tmp_digest[46] = byte_swap_32 (digest[46]);
+  tmp_digest[47] = byte_swap_32 (digest[47]);
+  tmp_digest[48] = byte_swap_32 (digest[48]);
+  tmp_digest[49] = byte_swap_32 (digest[49]);
+  tmp_digest[50] = byte_swap_32 (digest[50]);
+  tmp_digest[51] = byte_swap_32 (digest[51]);
+  tmp_digest[52] = byte_swap_32 (digest[52]);
+  tmp_digest[53] = byte_swap_32 (digest[53]);
+  tmp_digest[54] = byte_swap_32 (digest[54]);
+  tmp_digest[55] = byte_swap_32 (digest[55]);
+  tmp_digest[56] = byte_swap_32 (digest[56]);
+  tmp_digest[57] = byte_swap_32 (digest[57]);
+  tmp_digest[58] = byte_swap_32 (digest[58]);
+  tmp_digest[59] = byte_swap_32 (digest[59]);
+  tmp_digest[60] = byte_swap_32 (digest[60]);
+  tmp_digest[61] = byte_swap_32 (digest[61]);
+  tmp_digest[62] = byte_swap_32 (digest[62]);
+  tmp_digest[63] = byte_swap_32 (digest[63]);
+
+  char tmp_buf[324] = { 0 };
+  memset (tmp_buf, 0, sizeof (tmp_buf));
+
+  uint32_t salt_iters[4] = { 0 };
+
+  salt_iters[0] = byte_swap_32 (salt->salt_iter + 1); //htonl(salt->salt_iter);
+
+  memcpy (tmp_buf, salt_iters, 4);
+  memcpy (tmp_buf + 4, pbkdf2_sha256->salt_buf, salt->salt_len);
+  memcpy (tmp_buf + 4 + 64, tmp_digest, 256);
+
+  char ptr_plain[433] = { 0 };
+
+  base64_encode (int_to_base64, (const u8 *) tmp_buf, 324, (u8 *) ptr_plain);
+
+  const int line_len = snprintf (line_buf, line_size, "%s%s", SIGNATURE_REDHAT_PBKDF2_SHA256, ptr_plain);
+
+  return line_len;
+
+}
+
+void module_init (module_ctx_t *module_ctx)
+{
+  module_ctx->module_context_size             = MODULE_CONTEXT_SIZE_CURRENT;
+  module_ctx->module_interface_version        = MODULE_INTERFACE_VERSION_CURRENT;
+
+  module_ctx->module_attack_exec              = module_attack_exec;
+  module_ctx->module_benchmark_esalt          = MODULE_DEFAULT;
+  module_ctx->module_benchmark_hook_salt      = MODULE_DEFAULT;
+  module_ctx->module_benchmark_mask           = MODULE_DEFAULT;
+  module_ctx->module_benchmark_salt           = MODULE_DEFAULT;
+  module_ctx->module_build_plain_postprocess  = MODULE_DEFAULT;
+  module_ctx->module_deep_comp_kernel         = MODULE_DEFAULT;
+  module_ctx->module_dgst_pos0                = module_dgst_pos0;
+  module_ctx->module_dgst_pos1                = module_dgst_pos1;
+  module_ctx->module_dgst_pos2                = module_dgst_pos2;
+  module_ctx->module_dgst_pos3                = module_dgst_pos3;
+  module_ctx->module_dgst_size                = module_dgst_size;
+  module_ctx->module_dictstat_disable         = MODULE_DEFAULT;
+  module_ctx->module_esalt_size               = module_esalt_size;
+  module_ctx->module_extra_buffer_size        = MODULE_DEFAULT;
+  module_ctx->module_extra_tmp_size           = MODULE_DEFAULT;
+  module_ctx->module_forced_outfile_format    = MODULE_DEFAULT;
+  module_ctx->module_hash_binary_count        = MODULE_DEFAULT;
+  module_ctx->module_hash_binary_parse        = MODULE_DEFAULT;
+  module_ctx->module_hash_binary_save         = MODULE_DEFAULT;
+  module_ctx->module_hash_decode_potfile      = MODULE_DEFAULT;
+  module_ctx->module_hash_decode_zero_hash    = MODULE_DEFAULT;
+  module_ctx->module_hash_decode              = module_hash_decode;
+  module_ctx->module_hash_encode_status       = MODULE_DEFAULT;
+  module_ctx->module_hash_encode_potfile      = MODULE_DEFAULT;
+  module_ctx->module_hash_encode              = module_hash_encode;
+  module_ctx->module_hash_init_selftest       = MODULE_DEFAULT;
+  module_ctx->module_hash_mode                = MODULE_DEFAULT;
+  module_ctx->module_hash_category            = module_hash_category;
+  module_ctx->module_hash_name                = module_hash_name;
+  module_ctx->module_hashes_count_min         = MODULE_DEFAULT;
+  module_ctx->module_hashes_count_max         = MODULE_DEFAULT;
+  module_ctx->module_hlfmt_disable            = MODULE_DEFAULT;
+  module_ctx->module_hook12                   = MODULE_DEFAULT;
+  module_ctx->module_hook23                   = MODULE_DEFAULT;
+  module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
+  module_ctx->module_hook_size                = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
+  module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
+  module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
+  module_ctx->module_kernel_loops_max         = MODULE_DEFAULT;
+  module_ctx->module_kernel_loops_min         = MODULE_DEFAULT;
+  module_ctx->module_kernel_threads_max       = MODULE_DEFAULT;
+  module_ctx->module_kernel_threads_min       = MODULE_DEFAULT;
+  module_ctx->module_kern_type                = module_kern_type;
+  module_ctx->module_kern_type_dynamic        = MODULE_DEFAULT;
+  module_ctx->module_opti_type                = module_opti_type;
+  module_ctx->module_opts_type                = module_opts_type;
+  module_ctx->module_outfile_check_disable    = MODULE_DEFAULT;
+  module_ctx->module_outfile_check_nocomp     = MODULE_DEFAULT;
+  module_ctx->module_potfile_custom_check     = MODULE_DEFAULT;
+  module_ctx->module_potfile_disable          = MODULE_DEFAULT;
+  module_ctx->module_potfile_keep_all_hashes  = MODULE_DEFAULT;
+  module_ctx->module_pwdump_column            = MODULE_DEFAULT;
+  module_ctx->module_pw_max                   = module_pw_max;
+  module_ctx->module_pw_min                   = MODULE_DEFAULT;
+  module_ctx->module_salt_max                 = MODULE_DEFAULT;
+  module_ctx->module_salt_min                 = MODULE_DEFAULT;
+  module_ctx->module_salt_type                = module_salt_type;
+  module_ctx->module_separator                = MODULE_DEFAULT;
+  module_ctx->module_st_hash                  = module_st_hash;
+  module_ctx->module_st_pass                  = module_st_pass;
+  module_ctx->module_tmp_size                 = module_tmp_size;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
+  module_ctx->module_warmup_disable           = MODULE_DEFAULT;
+}
+
diff --git a/tools/test_modules/m23911.pm b/tools/test_modules/m23911.pm
new file mode 100644
index 000000000..fe7269069
--- /dev/null
+++ b/tools/test_modules/m23911.pm
@@ -0,0 +1,77 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+use Crypt::PBKDF2;
+use MIME::Base64;
+
+sub module_constraints { [[0, 256], [64, 64], [-1, -1], [-1, -1], [-1, -1]] }
+
+sub module_generate_hash
+{
+  my $word  = shift;
+  my $salt  = shift;
+  my $iter  = shift // 10000;
+
+  if (length $salt == 0)
+  {
+    $salt = random_bytes (16);
+  }
+
+  my $pbkdf2 = Crypt::PBKDF2->new(
+    hash_class => 'HMACSHA2',
+    iterations => $iter,
+    output_len => 256,
+    salt_len => 64,
+  );
+  my $p = $pbkdf2->generate($word, $salt);
+
+  my $decoded_hash = $pbkdf2->decode_string($p);
+
+  my $diter = $decoded_hash->{"iterations"};
+
+  my $iterbytes = pack('I', unpack('N*', pack('L*', $diter)));
+
+  my $dsalt = $decoded_hash->{"salt"};
+
+  my $dhash = $decoded_hash->{"hash"};
+
+  my $tmp = $iterbytes . $dsalt . $dhash;
+
+  my $hash = "{PBKDF2_SHA256}" . encode_base64($tmp, '');
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash, $word) = split (':', $line);
+
+  return unless (substr ($hash, 0, 15) eq '{PBKDF2_SHA256}');
+
+  my $hashbytes = decode_base64(substr ($hash, 15, length $hash));
+
+  my $iterbytes = substr $hashbytes, 0, 4;
+
+  my $iter = unpack('N*', pack('L*', unpack("I",$iterbytes)));
+
+  my $salt = substr $hashbytes, 4, 64;
+
+  return unless defined $salt;
+  return unless defined $iter;
+  return unless defined $word;
+
+  my $new_hash = module_generate_hash ($word, $salt, $iter);
+
+  return ($new_hash, $word);
+}
+
+1;
+