Rename DH Family Macros According to PSA Spec

Rename PSA_DH_GROUP_xxx to PSA_DH_FAMILY_xxx, also rename
PSA_KEY_TYPE_GET_GROUP to PSA_KEY_TYPE_DH_GET_FAMILY and rename
psa_dh_group_t to psa_dh_family_t. Old defines are provided in
include/crypto_compat.h for backward compatibility.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/include/psa/crypto_compat.h b/include/psa/crypto_compat.h
index cc95a13..cb2be7f 100644
--- a/include/psa/crypto_compat.h
+++ b/include/psa/crypto_compat.h
@@ -51,10 +51,12 @@
 typedef MBEDTLS_PSA_DEPRECATED psa_status_t mbedtls_deprecated_psa_status_t;
 typedef MBEDTLS_PSA_DEPRECATED psa_key_usage_t mbedtls_deprecated_psa_key_usage_t;
 typedef MBEDTLS_PSA_DEPRECATED psa_ecc_family_t mbedtls_deprecated_psa_ecc_family_t;
-typedef MBEDTLS_PSA_DEPRECATED psa_dh_group_t mbedtls_deprecated_psa_dh_group_t;
+typedef MBEDTLS_PSA_DEPRECATED psa_dh_family_t mbedtls_deprecated_psa_dh_family_t;
 typedef MBEDTLS_PSA_DEPRECATED psa_ecc_family_t psa_ecc_curve_t;
+typedef MBEDTLS_PSA_DEPRECATED psa_dh_family_t psa_dh_group_t;
 
 #define PSA_KEY_TYPE_GET_CURVE PSA_KEY_TYPE_ECC_GET_FAMILY
+#define PSA_KEY_TYPE_GET_GROUP PSA_KEY_TYPE_DH_GET_FAMILY
 
 #define MBEDTLS_DEPRECATED_CONSTANT( type, value )      \
     ( (mbedtls_deprecated_##type) ( value ) )
@@ -118,7 +120,7 @@
 #endif /* MBEDTLS_DEPRECATED_REMOVED */
 
 /*
- * Size-specific elliptic curve and Diffie-Hellman group names
+ * Size-specific elliptic curve families.
  */
 #define PSA_ECC_CURVE_SECP160K1 \
     MBEDTLS_DEPRECATED_CONSTANT( psa_ecc_family_t, PSA_ECC_FAMILY_SECP_K1 )
@@ -201,16 +203,27 @@
 #define PSA_ECC_CURVE_MONTGOMERY \
     MBEDTLS_DEPRECATED_CONSTANT( psa_ecc_family_t, PSA_ECC_FAMILY_MONTGOMERY )
 
+/*
+ * Finite-field Diffie-Hellman families.
+ */
 #define PSA_DH_GROUP_FFDHE2048 \
-    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_group_t, PSA_DH_GROUP_RFC7919 )
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_RFC7919 )
 #define PSA_DH_GROUP_FFDHE3072 \
-    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_group_t, PSA_DH_GROUP_RFC7919 )
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_RFC7919 )
 #define PSA_DH_GROUP_FFDHE4096 \
-    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_group_t, PSA_DH_GROUP_RFC7919 )
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_RFC7919 )
 #define PSA_DH_GROUP_FFDHE6144 \
-    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_group_t, PSA_DH_GROUP_RFC7919 )
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_RFC7919 )
 #define PSA_DH_GROUP_FFDHE8192 \
-    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_group_t, PSA_DH_GROUP_RFC7919 )
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_RFC7919 )
+
+/*
+ * Diffie-Hellman families that changed name due to PSA specification.
+ */
+#define PSA_DH_GROUP_RFC7919 \
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_RFC7919 )
+#define PSA_DH_GROUP_CUSTOM \
+    MBEDTLS_DEPRECATED_CONSTANT( psa_dh_family_t, PSA_DH_FAMILY_CUSTOM )
 
 #ifdef __cplusplus
 }
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index ceca3e3..afb16ad 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -414,11 +414,11 @@
 
 /** Custom Diffie-Hellman group.
  *
- * For keys of type #PSA_KEY_TYPE_DH_PUBLIC_KEY(#PSA_DH_GROUP_CUSTOM) or
- * #PSA_KEY_TYPE_DH_KEY_PAIR(#PSA_DH_GROUP_CUSTOM), the group data comes
+ * For keys of type #PSA_KEY_TYPE_DH_PUBLIC_KEY(#PSA_DH_FAMILY_CUSTOM) or
+ * #PSA_KEY_TYPE_DH_KEY_PAIR(#PSA_DH_FAMILY_CUSTOM), the group data comes
  * from domain parameters set by psa_set_key_domain_parameters().
  */
-#define PSA_DH_GROUP_CUSTOM             ((psa_dh_group_t) 0x7e)
+#define PSA_DH_FAMILY_CUSTOM             ((psa_dh_family_t) 0x7e)
 
 
 /**
@@ -448,8 +448,8 @@
  *   }
  *   ```
  * - For Diffie-Hellman key exchange keys
- *   (#PSA_KEY_TYPE_DH_PUBLIC_KEY(#PSA_DH_GROUP_CUSTOM) or
- *   #PSA_KEY_TYPE_DH_KEY_PAIR(#PSA_DH_GROUP_CUSTOM)), the
+ *   (#PSA_KEY_TYPE_DH_PUBLIC_KEY(#PSA_DH_FAMILY_CUSTOM) or
+ *   #PSA_KEY_TYPE_DH_KEY_PAIR(#PSA_DH_FAMILY_CUSTOM)), the
  *   `DomainParameters` format as defined by RFC 3279 &sect;2.3.3.
  *   ```
  *   DomainParameters ::= SEQUENCE {
diff --git a/include/psa/crypto_types.h b/include/psa/crypto_types.h
index 8e98eaf..29e1f29 100644
--- a/include/psa/crypto_types.h
+++ b/include/psa/crypto_types.h
@@ -85,7 +85,7 @@
  * Values defined by this standard will never be in the range 0x80-0xff.
  * Vendors who define additional families must use an encoding in this range.
  */
-typedef uint8_t psa_dh_group_t;
+typedef uint8_t psa_dh_family_t;
 
 /** \brief Encoding of a cryptographic algorithm.
  *
diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index 3feaa1c..73d7d9d 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -536,14 +536,14 @@
 #define PSA_KEY_TYPE_DH_GROUP_MASK                  ((psa_key_type_t)0x00ff)
 /** Diffie-Hellman key pair.
  *
- * \param group     A value of type ::psa_dh_group_t that identifies the
+ * \param group     A value of type ::psa_dh_family_t that identifies the
  *                  Diffie-Hellman group to be used.
  */
 #define PSA_KEY_TYPE_DH_KEY_PAIR(group)          \
     (PSA_KEY_TYPE_DH_KEY_PAIR_BASE | (group))
 /** Diffie-Hellman public key.
  *
- * \param group     A value of type ::psa_dh_group_t that identifies the
+ * \param group     A value of type ::psa_dh_family_t that identifies the
  *                  Diffie-Hellman group to be used.
  */
 #define PSA_KEY_TYPE_DH_PUBLIC_KEY(group)               \
@@ -563,8 +563,8 @@
      PSA_KEY_TYPE_DH_PUBLIC_KEY_BASE)
 
 /** Extract the group from a Diffie-Hellman key type. */
-#define PSA_KEY_TYPE_GET_GROUP(type)                            \
-    ((psa_dh_group_t) (PSA_KEY_TYPE_IS_DH(type) ?               \
+#define PSA_KEY_TYPE_DH_GET_FAMILY(type)                        \
+    ((psa_dh_family_t) (PSA_KEY_TYPE_IS_DH(type) ?              \
                        ((type) & PSA_KEY_TYPE_DH_GROUP_MASK) :  \
                        0))
 
@@ -574,7 +574,7 @@
  * 2048, 3072, 4096, 6144, 8192. A given implementation may support
  * all of these sizes or only a subset.
  */
-#define PSA_DH_GROUP_RFC7919            ((psa_dh_group_t) 0x03)
+#define PSA_DH_FAMILY_RFC7919            ((psa_dh_family_t) 0x03)
 
 #define PSA_GET_KEY_TYPE_BLOCK_SIZE_EXPONENT(type)      \
     (((type) >> 8) & 7)