diff --git a/scripts/mbedtls_dev/bignum_data.py b/scripts/mbedtls_dev/bignum_data.py
new file mode 100644
index 0000000000..78fbb8c049
--- /dev/null
+++ b/scripts/mbedtls_dev/bignum_data.py
@@ -0,0 +1,109 @@
+"""Base values and datasets for bignum generated tests and helper functions that
+produced them."""
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import random
+
+# Functions calling these were used to produce test data and are here only for
+# reproducability, they are not used by the test generation framework/classes
+try:
+    from Cryptodome.Util.number import isPrime, getPrime #type: ignore #pylint: disable=import-error
+except ImportError:
+    pass
+
+# Generated by bignum_common.gen_safe_prime(192,1)
+SAFE_PRIME_192_BIT_SEED_1 = "d1c127a667786703830500038ebaef20e5a3e2dc378fb75b"
+
+# First number generated by random.getrandbits(192) - seed(2,2), not a prime
+RANDOM_192_BIT_SEED_2_NO1 = "177219d30e7a269fd95bafc8f2a4d27bdcf4bb99f4bea973"
+
+# Second number generated by random.getrandbits(192) - seed(2,2), not a prime
+RANDOM_192_BIT_SEED_2_NO2 = "cf1822ffbc6887782b491044d5e341245c6e433715ba2bdd"
+
+# Third number generated by random.getrandbits(192) - seed(2,2), not a prime
+RANDOM_192_BIT_SEED_2_NO3 = "3653f8dd9b1f282e4067c3584ee207f8da94e3e8ab73738f"
+
+# Fourth number generated by random.getrandbits(192) - seed(2,2), not a prime
+RANDOM_192_BIT_SEED_2_NO4 = "ffed9235288bc781ae66267594c9c9500925e4749b575bd1"
+
+# Ninth number generated by random.getrandbits(192) - seed(2,2), not a prime
+RANDOM_192_BIT_SEED_2_NO9 = "2a1be9cd8697bbd0e2520e33e44c50556c71c4a66148a86f"
+
+# Generated by bignum_common.gen_safe_prime(1024,3)
+SAFE_PRIME_1024_BIT_SEED_3 = ("c93ba7ec74d96f411ba008bdb78e63ff11bb5df46a51e16b"
+                              "2c9d156f8e4e18abf5e052cb01f47d0d1925a77f60991577"
+                              "e128fb6f52f34a27950a594baadd3d8057abeb222cf3cca9"
+                              "62db16abf79f2ada5bd29ab2f51244bf295eff9f6aaba130"
+                              "2efc449b128be75eeaca04bc3c1a155d11d14e8be32a2c82"
+                              "87b3996cf6ad5223")
+
+# First number generated by random.getrandbits(1024) - seed(4,2), not a prime
+RANDOM_1024_BIT_SEED_4_NO1 = ("6905269ed6f0b09f165c8ce36e2f24b43000de01b2ed40ed"
+                              "3addccb2c33be0ac79d679346d4ac7a5c3902b38963dc6e8"
+                              "534f45738d048ec0f1099c6c3e1b258fd724452ccea71ff4"
+                              "a14876aeaff1a098ca5996666ceab360512bd13110722311"
+                              "710cf5327ac435a7a97c643656412a9b8a1abcd1a6916c74"
+                              "da4f9fc3c6da5d7")
+
+# Second number generated by random.getrandbits(1024) - seed(4,2), not a prime
+RANDOM_1024_BIT_SEED_4_NO2 = ("f1cfd99216df648647adec26793d0e453f5082492d83a823"
+                              "3fb62d2c81862fc9634f806fabf4a07c566002249b191bf4"
+                              "d8441b5616332aca5f552773e14b0190d93936e1daca3c06"
+                              "f5ff0c03bb5d7385de08caa1a08179104a25e4664f5253a0"
+                              "2a3187853184ff27459142deccea264542a00403ce80c4b0"
+                              "a4042bb3d4341aad")
+
+# Third number generated by random.getrandbits(1024) - seed(4,2), not a prime
+RANDOM_1024_BIT_SEED_4_NO3 = ("14c15c910b11ad28cc21ce88d0060cc54278c2614e1bcb38"
+                              "3bb4a570294c4ea3738d243a6e58d5ca49c7b59b995253fd"
+                              "6c79a3de69f85e3131f3b9238224b122c3e4a892d9196ada"
+                              "4fcfa583e1df8af9b474c7e89286a1754abcb06ae8abb93f"
+                              "01d89a024cdce7a6d7288ff68c320f89f1347e0cdd905ecf"
+                              "d160c5d0ef412ed6")
+
+# Fourth number generated by random.getrandbits(1024) - seed(4,2), not a prime
+RANDOM_1024_BIT_SEED_4_NO4 = ("32decd6b8efbc170a26a25c852175b7a96b98b5fbf37a2be"
+                              "6f98bca35b17b9662f0733c846bbe9e870ef55b1a1f65507"
+                              "a2909cb633e238b4e9dd38b869ace91311021c9e32111ac1"
+                              "ac7cc4a4ff4dab102522d53857c49391b36cc9aa78a330a1"
+                              "a5e333cb88dcf94384d4cd1f47ca7883ff5a52f1a05885ac"
+                              "7671863c0bdbc23a")
+
+# Fifth number generated by random.getrandbits(1024) - seed(4,2), not a prime
+RANDOM_1024_BIT_SEED_4_NO5 = ("53be4721f5b9e1f5acdac615bc20f6264922b9ccf469aef8"
+                              "f6e7d078e55b85dd1525f363b281b8885b69dc230af5ac87"
+                              "0692b534758240df4a7a03052d733dcdef40af2e54c0ce68"
+                              "1f44ebd13cc75f3edcb285f89d8cf4d4950b16ffc3e1ac3b"
+                              "4708d9893a973000b54a23020fc5b043d6e4a51519d9c9cc"
+                              "52d32377e78131c1")
+
+def __gen_safe_prime(bits, seed):
+    '''
+    Generate a safe prime.
+
+    This function is intended for generating constants offline and shouldn't be
+    used in test generation classes.
+
+    Requires pycryptodomex for getPrime and isPrime and python 3.9 or later for
+    randbytes.
+    '''
+    rng = random.Random()
+    # We want reproducability across python versions
+    rng.seed(seed, version=2)
+    while True:
+        prime = 2*getPrime(bits-1, rng.randbytes)+1 #pylint: disable=no-member
+        if isPrime(prime, 1e-30):
+            return prime