Removed openssl, and curl, and added mbedded tls.curl-removal

Almost fully removed curl, needs more testing.

Fixed most issues, now trying to cross compile.

Fix?

Sigh.

1 files changed, 509 insertions, 0 deletions

diff --git a/lib/mbedtls-2.27.0/include/mbedtls/psa_util.h b/lib/mbedtls-2.27.0/include/mbedtls/psa_util.h
new file mode 100644
index 0000000..691ff3c
--- /dev/null
+++ b/lib/mbedtls-2.27.0/include/mbedtls/psa_util.h
@@ -0,0 +1,509 @@
+/**
+ * \file psa_util.h
+ *
+ * \brief Utility functions for the use of the PSA Crypto library.
+ *
+ * \warning This function is not part of the public API and may
+ *          change at any time.
+ */
+/*
+ *  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.
+ */
+
+#ifndef MBEDTLS_PSA_UTIL_H
+#define MBEDTLS_PSA_UTIL_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+
+#include "psa/crypto.h"
+
+#include "mbedtls/ecp.h"
+#include "mbedtls/md.h"
+#include "mbedtls/pk.h"
+#include "mbedtls/oid.h"
+
+#include <string.h>
+
+/* Translations for symmetric crypto. */
+
+static inline psa_key_type_t mbedtls_psa_translate_cipher_type(
+    mbedtls_cipher_type_t cipher )
+{
+    switch( cipher )
+    {
+        case MBEDTLS_CIPHER_AES_128_CCM:
+        case MBEDTLS_CIPHER_AES_192_CCM:
+        case MBEDTLS_CIPHER_AES_256_CCM:
+        case MBEDTLS_CIPHER_AES_128_GCM:
+        case MBEDTLS_CIPHER_AES_192_GCM:
+        case MBEDTLS_CIPHER_AES_256_GCM:
+        case MBEDTLS_CIPHER_AES_128_CBC:
+        case MBEDTLS_CIPHER_AES_192_CBC:
+        case MBEDTLS_CIPHER_AES_256_CBC:
+            return( PSA_KEY_TYPE_AES );
+
+        /* ARIA not yet supported in PSA. */
+        /* case MBEDTLS_CIPHER_ARIA_128_CCM:
+           case MBEDTLS_CIPHER_ARIA_192_CCM:
+           case MBEDTLS_CIPHER_ARIA_256_CCM:
+           case MBEDTLS_CIPHER_ARIA_128_GCM:
+           case MBEDTLS_CIPHER_ARIA_192_GCM:
+           case MBEDTLS_CIPHER_ARIA_256_GCM:
+           case MBEDTLS_CIPHER_ARIA_128_CBC:
+           case MBEDTLS_CIPHER_ARIA_192_CBC:
+           case MBEDTLS_CIPHER_ARIA_256_CBC:
+               return( PSA_KEY_TYPE_ARIA ); */
+
+        default:
+            return( 0 );
+    }
+}
+
+static inline psa_algorithm_t mbedtls_psa_translate_cipher_mode(
+    mbedtls_cipher_mode_t mode, size_t taglen )
+{
+    switch( mode )
+    {
+        case MBEDTLS_MODE_ECB:
+            return( PSA_ALG_ECB_NO_PADDING );
+        case MBEDTLS_MODE_GCM:
+            return( PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_GCM, taglen ) );
+        case MBEDTLS_MODE_CCM:
+            return( PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CCM, taglen ) );
+        case MBEDTLS_MODE_CBC:
+            if( taglen == 0 )
+                return( PSA_ALG_CBC_NO_PADDING );
+            else
+                return( 0 );
+        default:
+            return( 0 );
+    }
+}
+
+static inline psa_key_usage_t mbedtls_psa_translate_cipher_operation(
+    mbedtls_operation_t op )
+{
+    switch( op )
+    {
+        case MBEDTLS_ENCRYPT:
+            return( PSA_KEY_USAGE_ENCRYPT );
+        case MBEDTLS_DECRYPT:
+            return( PSA_KEY_USAGE_DECRYPT );
+        default:
+            return( 0 );
+    }
+}
+
+/* Translations for hashing. */
+
+static inline psa_algorithm_t mbedtls_psa_translate_md( mbedtls_md_type_t md_alg )
+{
+    switch( md_alg )
+    {
+#if defined(MBEDTLS_MD2_C)
+    case MBEDTLS_MD_MD2:
+        return( PSA_ALG_MD2 );
+#endif
+#if defined(MBEDTLS_MD4_C)
+    case MBEDTLS_MD_MD4:
+        return( PSA_ALG_MD4 );
+#endif
+#if defined(MBEDTLS_MD5_C)
+    case MBEDTLS_MD_MD5:
+        return( PSA_ALG_MD5 );
+#endif
+#if defined(MBEDTLS_SHA1_C)
+    case MBEDTLS_MD_SHA1:
+        return( PSA_ALG_SHA_1 );
+#endif
+#if defined(MBEDTLS_SHA256_C)
+    case MBEDTLS_MD_SHA224:
+        return( PSA_ALG_SHA_224 );
+    case MBEDTLS_MD_SHA256:
+        return( PSA_ALG_SHA_256 );
+#endif
+#if defined(MBEDTLS_SHA512_C)
+    case MBEDTLS_MD_SHA384:
+        return( PSA_ALG_SHA_384 );
+    case MBEDTLS_MD_SHA512:
+        return( PSA_ALG_SHA_512 );
+#endif
+#if defined(MBEDTLS_RIPEMD160_C)
+    case MBEDTLS_MD_RIPEMD160:
+        return( PSA_ALG_RIPEMD160 );
+#endif
+    case MBEDTLS_MD_NONE:
+        return( 0 );
+    default:
+        return( 0 );
+    }
+}
+
+/* Translations for ECC. */
+
+static inline int mbedtls_psa_get_ecc_oid_from_id(
+    psa_ecc_family_t curve, size_t bits,
+    char const **oid, size_t *oid_len )
+{
+    switch( curve )
+    {
+        case PSA_ECC_FAMILY_SECP_R1:
+            switch( bits )
+            {
+#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
+                case 192:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP192R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP192R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP192R1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
+                case 224:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP224R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP224R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP224R1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+                case 256:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP256R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP256R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP256R1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+                case 384:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP384R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP384R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP384R1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
+                case 521:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP521R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP521R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP521R1_ENABLED */
+            }
+            break;
+        case PSA_ECC_FAMILY_SECP_K1:
+            switch( bits )
+            {
+#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
+                case 192:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP192K1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP192K1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP192K1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
+                case 224:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP224K1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP224K1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP224K1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
+                case 256:
+                    *oid = MBEDTLS_OID_EC_GRP_SECP256K1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_SECP256K1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_SECP256K1_ENABLED */
+            }
+            break;
+        case PSA_ECC_FAMILY_BRAINPOOL_P_R1:
+            switch( bits )
+            {
+#if defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
+                case 256:
+                    *oid = MBEDTLS_OID_EC_GRP_BP256R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_BP256R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_BP256R1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
+                case 384:
+                    *oid = MBEDTLS_OID_EC_GRP_BP384R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_BP384R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_BP384R1_ENABLED */
+#if defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
+                case 512:
+                    *oid = MBEDTLS_OID_EC_GRP_BP512R1;
+                    *oid_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_EC_GRP_BP512R1 );
+                    return( 0 );
+#endif /* MBEDTLS_ECP_DP_BP512R1_ENABLED */
+            }
+            break;
+    }
+    (void) oid;
+    (void) oid_len;
+    return( -1 );
+}
+
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH 1
+
+#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP192R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP224R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP256R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP384R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 521 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 521 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP521R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP192K1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP224K1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP256K1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_BP256R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_BP384R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 512 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 512 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_BP512R1_ENABLED */
+
+
+/* Translations for PK layer */
+
+static inline int mbedtls_psa_err_translate_pk( psa_status_t status )
+{
+    switch( status )
+    {
+        case PSA_SUCCESS:
+            return( 0 );
+        case PSA_ERROR_NOT_SUPPORTED:
+            return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
+        case PSA_ERROR_INSUFFICIENT_MEMORY:
+            return( MBEDTLS_ERR_PK_ALLOC_FAILED );
+        case PSA_ERROR_INSUFFICIENT_ENTROPY:
+            return( MBEDTLS_ERR_ECP_RANDOM_FAILED );
+        case PSA_ERROR_BAD_STATE:
+            return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+        /* All other failures */
+        case PSA_ERROR_COMMUNICATION_FAILURE:
+        case PSA_ERROR_HARDWARE_FAILURE:
+        case PSA_ERROR_CORRUPTION_DETECTED:
+            return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
+        default: /* We return the same as for the 'other failures',
+                  * but list them separately nonetheless to indicate
+                  * which failure conditions we have considered. */
+            return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
+    }
+}
+
+/* Translations for ECC */
+
+/* This function transforms an ECC group identifier from
+ * https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8
+ * into a PSA ECC group identifier. */
+#if defined(MBEDTLS_ECP_C)
+static inline psa_key_type_t mbedtls_psa_parse_tls_ecc_group(
+    uint16_t tls_ecc_grp_reg_id, size_t *bits )
+{
+    const mbedtls_ecp_curve_info *curve_info =
+        mbedtls_ecp_curve_info_from_tls_id( tls_ecc_grp_reg_id );
+    if( curve_info == NULL )
+        return( 0 );
+    return( PSA_KEY_TYPE_ECC_KEY_PAIR(
+                mbedtls_ecc_group_to_psa( curve_info->grp_id, bits ) ) );
+}
+#endif /* MBEDTLS_ECP_C */
+
+/* This function takes a buffer holding an EC public key
+ * exported through psa_export_public_key(), and converts
+ * it into an ECPoint structure to be put into a ClientKeyExchange
+ * message in an ECDHE exchange.
+ *
+ * Both the present and the foreseeable future format of EC public keys
+ * used by PSA have the ECPoint structure contained in the exported key
+ * as a subbuffer, and the function merely selects this subbuffer instead
+ * of making a copy.
+ */
+static inline int mbedtls_psa_tls_psa_ec_to_ecpoint( unsigned char *src,
+                                                     size_t srclen,
+                                                     unsigned char **dst,
+                                                     size_t *dstlen )
+{
+    *dst = src;
+    *dstlen = srclen;
+    return( 0 );
+}
+
+/* This function takes a buffer holding an ECPoint structure
+ * (as contained in a TLS ServerKeyExchange message for ECDHE
+ * exchanges) and converts it into a format that the PSA key
+ * agreement API understands.
+ */
+static inline int mbedtls_psa_tls_ecpoint_to_psa_ec( unsigned char const *src,
+                                                     size_t srclen,
+                                                     unsigned char *dst,
+                                                     size_t dstlen,
+                                                     size_t *olen )
+{
+    if( srclen > dstlen )
+        return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL );
+
+    memcpy( dst, src, srclen );
+    *olen = srclen;
+    return( 0 );
+}
+
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
+/* Expose whatever RNG the PSA subsystem uses to applications using the
+ * mbedtls_xxx API. The declarations and definitions here need to be
+ * consistent with the implementation in library/psa_crypto_random_impl.h.
+ * See that file for implementation documentation. */
+#if defined(MBEDTLS_PSA_CRYPTO_C)
+
+/* The type of a `f_rng` random generator function that many library functions
+ * take.
+ *
+ * This type name is not part of the Mbed TLS stable API. It may be renamed
+ * or moved without warning.
+ */
+typedef int mbedtls_f_rng_t( void *p_rng, unsigned char *output, size_t output_size );
+
+#if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
+
+/** The random generator function for the PSA subsystem.
+ *
+ * This function is suitable as the `f_rng` random generator function
+ * parameter of many `mbedtls_xxx` functions. Use #MBEDTLS_PSA_RANDOM_STATE
+ * to obtain the \p p_rng parameter.
+ *
+ * The implementation of this function depends on the configuration of the
+ * library.
+ *
+ * \note Depending on the configuration, this may be a function or
+ *       a pointer to a function.
+ *
+ * \note This function may only be used if the PSA crypto subsystem is active.
+ *       This means that you must call psa_crypto_init() before any call to
+ *       this function, and you must not call this function after calling
+ *       mbedtls_psa_crypto_free().
+ *
+ * \param p_rng         The random generator context. This must be
+ *                      #MBEDTLS_PSA_RANDOM_STATE. No other state is
+ *                      supported.
+ * \param output        The buffer to fill. It must have room for
+ *                      \c output_size bytes.
+ * \param output_size   The number of bytes to write to \p output.
+ *                      This function may fail if \p output_size is too
+ *                      large. It is guaranteed to accept any output size
+ *                      requested by Mbed TLS library functions. The
+ *                      maximum request size depends on the library
+ *                      configuration.
+ *
+ * \return              \c 0 on success.
+ * \return              An `MBEDTLS_ERR_ENTROPY_xxx`,
+ *                      `MBEDTLS_ERR_PLATFORM_xxx,
+ *                      `MBEDTLS_ERR_CTR_DRBG_xxx` or
+ *                      `MBEDTLS_ERR_HMAC_DRBG_xxx` on error.
+ */
+int mbedtls_psa_get_random( void *p_rng,
+                            unsigned char *output,
+                            size_t output_size );
+
+/** The random generator state for the PSA subsystem.
+ *
+ * This macro expands to an expression which is suitable as the `p_rng`
+ * random generator state parameter of many `mbedtls_xxx` functions.
+ * It must be used in combination with the random generator function
+ * mbedtls_psa_get_random().
+ *
+ * The implementation of this macro depends on the configuration of the
+ * library. Do not make any assumption on its nature.
+ */
+#define MBEDTLS_PSA_RANDOM_STATE NULL
+
+#else /* !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) */
+
+#if defined(MBEDTLS_CTR_DRBG_C)
+#include "mbedtls/ctr_drbg.h"
+typedef mbedtls_ctr_drbg_context mbedtls_psa_drbg_context_t;
+static mbedtls_f_rng_t *const mbedtls_psa_get_random = mbedtls_ctr_drbg_random;
+#elif defined(MBEDTLS_HMAC_DRBG_C)
+#include "mbedtls/hmac_drbg.h"
+typedef mbedtls_hmac_drbg_context mbedtls_psa_drbg_context_t;
+static mbedtls_f_rng_t *const mbedtls_psa_get_random = mbedtls_hmac_drbg_random;
+#endif
+extern mbedtls_psa_drbg_context_t *const mbedtls_psa_random_state;
+
+#define MBEDTLS_PSA_RANDOM_STATE mbedtls_psa_random_state
+
+#endif /* !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) */
+
+#endif /* MBEDTLS_PSA_CRYPTO_C */
+
+#endif /* MBEDTLS_PSA_UTIL_H */