diff --git a/include/mbedcrypto/pkcs12.h b/include/mbedcrypto/pkcs12.h
new file mode 100644
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--- /dev/null
+++ b/include/mbedcrypto/pkcs12.h
@@ -0,0 +1,120 @@
+/**
+ * \file pkcs12.h
+ *
+ * \brief PKCS#12 Personal Information Exchange Syntax
+ */
+/*
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  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.
+ *
+ *  This file is part of Mbed Crypto (https://tls.mbed.org)
+ */
+#ifndef MBEDCRYPTO_PKCS12_H
+#define MBEDCRYPTO_PKCS12_H
+
+#include "md.h"
+#include "cipher.h"
+#include "asn1.h"
+
+#include <stddef.h>
+
+#define MBEDCRYPTO_ERR_PKCS12_BAD_INPUT_DATA                 -0x1F80  /**< Bad input parameters to function. */
+#define MBEDCRYPTO_ERR_PKCS12_FEATURE_UNAVAILABLE            -0x1F00  /**< Feature not available, e.g. unsupported encryption scheme. */
+#define MBEDCRYPTO_ERR_PKCS12_PBE_INVALID_FORMAT             -0x1E80  /**< PBE ASN.1 data not as expected. */
+#define MBEDCRYPTO_ERR_PKCS12_PASSWORD_MISMATCH              -0x1E00  /**< Given private key password does not allow for correct decryption. */
+
+#define MBEDCRYPTO_PKCS12_DERIVE_KEY       1   /**< encryption/decryption key */
+#define MBEDCRYPTO_PKCS12_DERIVE_IV        2   /**< initialization vector     */
+#define MBEDCRYPTO_PKCS12_DERIVE_MAC_KEY   3   /**< integrity / MAC key       */
+
+#define MBEDCRYPTO_PKCS12_PBE_DECRYPT      0
+#define MBEDCRYPTO_PKCS12_PBE_ENCRYPT      1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief            PKCS12 Password Based function (encryption / decryption)
+ *                   for pbeWithSHAAnd128BitRC4
+ *
+ * \param pbe_params an ASN1 buffer containing the pkcs-12PbeParams structure
+ * \param mode       either MBEDCRYPTO_PKCS12_PBE_ENCRYPT or MBEDCRYPTO_PKCS12_PBE_DECRYPT
+ * \param pwd        the password used (may be NULL if no password is used)
+ * \param pwdlen     length of the password (may be 0)
+ * \param input      the input data
+ * \param len        data length
+ * \param output     the output buffer
+ *
+ * \return           0 if successful, or a MBEDCRYPTO_ERR_XXX code
+ */
+int mbedcrypto_pkcs12_pbe_sha1_rc4_128( mbedcrypto_asn1_buf *pbe_params, int mode,
+                             const unsigned char *pwd,  size_t pwdlen,
+                             const unsigned char *input, size_t len,
+                             unsigned char *output );
+
+/**
+ * \brief            PKCS12 Password Based function (encryption / decryption)
+ *                   for cipher-based and mbedcrypto_md-based PBE's
+ *
+ * \param pbe_params an ASN1 buffer containing the pkcs-12PbeParams structure
+ * \param mode       either MBEDCRYPTO_PKCS12_PBE_ENCRYPT or MBEDCRYPTO_PKCS12_PBE_DECRYPT
+ * \param cipher_type the cipher used
+ * \param md_type     the mbedcrypto_md used
+ * \param pwd        the password used (may be NULL if no password is used)
+ * \param pwdlen     length of the password (may be 0)
+ * \param input      the input data
+ * \param len        data length
+ * \param output     the output buffer
+ *
+ * \return           0 if successful, or a MBEDCRYPTO_ERR_XXX code
+ */
+int mbedcrypto_pkcs12_pbe( mbedcrypto_asn1_buf *pbe_params, int mode,
+                mbedcrypto_cipher_type_t cipher_type, mbedcrypto_md_type_t md_type,
+                const unsigned char *pwd,  size_t pwdlen,
+                const unsigned char *input, size_t len,
+                unsigned char *output );
+
+/**
+ * \brief            The PKCS#12 derivation function uses a password and a salt
+ *                   to produce pseudo-random bits for a particular "purpose".
+ *
+ *                   Depending on the given id, this function can produce an
+ *                   encryption/decryption key, an nitialization vector or an
+ *                   integrity key.
+ *
+ * \param data       buffer to store the derived data in
+ * \param datalen    length to fill
+ * \param pwd        password to use (may be NULL if no password is used)
+ * \param pwdlen     length of the password (may be 0)
+ * \param salt       salt buffer to use
+ * \param saltlen    length of the salt
+ * \param mbedcrypto_md         mbedcrypto_md type to use during the derivation
+ * \param id         id that describes the purpose (can be MBEDCRYPTO_PKCS12_DERIVE_KEY,
+ *                   MBEDCRYPTO_PKCS12_DERIVE_IV or MBEDCRYPTO_PKCS12_DERIVE_MAC_KEY)
+ * \param iterations number of iterations
+ *
+ * \return          0 if successful, or a MD, BIGNUM type error.
+ */
+int mbedcrypto_pkcs12_derivation( unsigned char *data, size_t datalen,
+                       const unsigned char *pwd, size_t pwdlen,
+                       const unsigned char *salt, size_t saltlen,
+                       mbedcrypto_md_type_t mbedcrypto_md, int id, int iterations );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* pkcs12.h */