diff --git a/library/cipher.c b/library/cipher.c
index 63f1f41..e854cf6 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -1236,7 +1236,7 @@
             (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
 
         psa_status_t status;
-        psa_cipher_operation_t cipher_op;
+        psa_cipher_operation_t cipher_op = PSA_CIPHER_OPERATION_INIT;
         size_t part_len;
 
         if( ctx->operation == MBEDTLS_DECRYPT )
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index cfa07a6..22b4c0c 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -1373,7 +1373,13 @@
                              psa_algorithm_t alg )
 {
     int ret;
-    operation->alg = 0;
+
+    /* A context must be freshly initialized before it can be set up. */
+    if( operation->alg != 0 )
+    {
+        return( PSA_ERROR_BAD_STATE );
+    }
+
     switch( alg )
     {
 #if defined(MBEDTLS_MD2_C)
@@ -1496,8 +1502,7 @@
             break;
 #endif
         default:
-            ret = MBEDTLS_ERR_MD_BAD_INPUT_DATA;
-            break;
+            return( PSA_ERROR_BAD_STATE );
     }
 
     if( ret != 0 )
@@ -1569,8 +1574,7 @@
             break;
 #endif
         default:
-            ret = MBEDTLS_ERR_MD_BAD_INPUT_DATA;
-            break;
+            return( PSA_ERROR_BAD_STATE );
     }
     status = mbedtls_to_psa_error( ret );
 
@@ -1994,6 +1998,12 @@
     unsigned char truncated = PSA_MAC_TRUNCATED_LENGTH( alg );
     psa_algorithm_t full_length_alg = PSA_ALG_FULL_LENGTH_MAC( alg );
 
+    /* A context must be freshly initialized before it can be set up. */
+    if( operation->alg != 0 )
+    {
+        return( PSA_ERROR_BAD_STATE );
+    }
+
     status = psa_mac_init( operation, full_length_alg );
     if( status != PSA_SUCCESS )
         return( status );
@@ -2112,9 +2122,9 @@
 {
     psa_status_t status = PSA_ERROR_BAD_STATE;
     if( ! operation->key_set )
-        goto cleanup;
+        return( PSA_ERROR_BAD_STATE );
     if( operation->iv_required && ! operation->iv_set )
-        goto cleanup;
+        return( PSA_ERROR_BAD_STATE );
     operation->has_input = 1;
 
 #if defined(MBEDTLS_CMAC_C)
@@ -2137,10 +2147,9 @@
     {
         /* This shouldn't happen if `operation` was initialized by
          * a setup function. */
-        status = PSA_ERROR_BAD_STATE;
+        return( PSA_ERROR_BAD_STATE );
     }
 
-cleanup:
     if( status != PSA_SUCCESS )
         psa_mac_abort( operation );
     return( status );
@@ -2232,6 +2241,11 @@
 {
     psa_status_t status;
 
+    if( operation->alg == 0 )
+    {
+        return( PSA_ERROR_BAD_STATE );
+    }
+
     /* Fill the output buffer with something that isn't a valid mac
      * (barring an attack on the mac and deliberately-crafted input),
      * in case the caller doesn't check the return status properly. */
@@ -2243,13 +2257,11 @@
 
     if( ! operation->is_sign )
     {
-        status = PSA_ERROR_BAD_STATE;
-        goto cleanup;
+        return( PSA_ERROR_BAD_STATE );
     }
 
     status = psa_mac_finish_internal( operation, mac, mac_size );
 
-cleanup:
     if( status == PSA_SUCCESS )
     {
         status = psa_mac_abort( operation );
@@ -2270,10 +2282,14 @@
     uint8_t actual_mac[PSA_MAC_MAX_SIZE];
     psa_status_t status;
 
+    if( operation->alg == 0 )
+    {
+        return( PSA_ERROR_BAD_STATE );
+    }
+
     if( operation->is_sign )
     {
-        status = PSA_ERROR_BAD_STATE;
-        goto cleanup;
+        return( PSA_ERROR_BAD_STATE );
     }
     if( operation->mac_size != mac_length )
     {
@@ -2895,6 +2911,12 @@
                               PSA_KEY_USAGE_ENCRYPT :
                               PSA_KEY_USAGE_DECRYPT );
 
+    /* A context must be freshly initialized before it can be set up. */
+    if( operation->alg != 0 )
+    {
+        return( PSA_ERROR_BAD_STATE );
+    }
+
     status = psa_cipher_init( operation, alg );
     if( status != PSA_SUCCESS )
         return( status );
@@ -2996,8 +3018,7 @@
     int ret;
     if( operation->iv_set || ! operation->iv_required )
     {
-        status = PSA_ERROR_BAD_STATE;
-        goto exit;
+        return( PSA_ERROR_BAD_STATE );
     }
     if( iv_size < operation->iv_size )
     {
@@ -3029,8 +3050,7 @@
     int ret;
     if( operation->iv_set || ! operation->iv_required )
     {
-        status = PSA_ERROR_BAD_STATE;
-        goto exit;
+        return( PSA_ERROR_BAD_STATE );
     }
     if( iv_length != operation->iv_size )
     {
@@ -3057,6 +3077,12 @@
     psa_status_t status;
     int ret;
     size_t expected_output_size;
+
+    if( operation->alg == 0 )
+    {
+        return( PSA_ERROR_BAD_STATE );
+    }
+
     if( ! PSA_ALG_IS_STREAM_CIPHER( operation->alg ) )
     {
         /* Take the unprocessed partial block left over from previous
@@ -3098,13 +3124,11 @@
 
     if( ! operation->key_set )
     {
-        status = PSA_ERROR_BAD_STATE;
-        goto error;
+        return( PSA_ERROR_BAD_STATE );
     }
     if( operation->iv_required && ! operation->iv_set )
     {
-        status = PSA_ERROR_BAD_STATE;
-        goto error;
+        return( PSA_ERROR_BAD_STATE );
     }
 
     if( operation->ctx.cipher.operation == MBEDTLS_ENCRYPT &&
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index f224d5e..a0d2617 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -6529,7 +6529,7 @@
     unsigned char padbuf[32];
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     size_t hash_size;
-    psa_hash_operation_t sha256_psa;
+    psa_hash_operation_t sha256_psa = PSA_HASH_OPERATION_INIT;
     psa_status_t status;
 #else
     mbedtls_sha256_context sha256;
@@ -6605,7 +6605,7 @@
     unsigned char padbuf[48];
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     size_t hash_size;
-    psa_hash_operation_t sha384_psa;
+    psa_hash_operation_t sha384_psa = PSA_HASH_OPERATION_INIT;
     psa_status_t status;
 #else
     mbedtls_sha512_context sha512;
@@ -10203,7 +10203,7 @@
                                             mbedtls_md_type_t md_alg )
 {
     psa_status_t status;
-    psa_hash_operation_t hash_operation;
+    psa_hash_operation_t hash_operation = PSA_HASH_OPERATION_INIT;
     psa_algorithm_t hash_alg = mbedtls_psa_translate_md( md_alg );
 
     MBEDTLS_SSL_DEBUG_MSG( 1, ( "Perform PSA-based computation of digest of ServerKeyExchange" ) );
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 1b1f0a7..1f853ba 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1908,7 +1908,7 @@
     if( mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash ) != 0 )
         return( -1 );
 #else
-    psa_hash_operation_t hash_operation;
+    psa_hash_operation_t hash_operation = PSA_HASH_OPERATION_INIT;
     psa_algorithm_t hash_alg = mbedtls_psa_translate_md( child->sig_md );
 
     if( psa_hash_setup( &hash_operation, hash_alg ) != PSA_SUCCESS )
diff --git a/library/x509write_csr.c b/library/x509write_csr.c
index f2950ad..777a632 100644
--- a/library/x509write_csr.c
+++ b/library/x509write_csr.c
@@ -142,7 +142,7 @@
     size_t len = 0;
     mbedtls_pk_type_t pk_alg;
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    psa_hash_operation_t hash_operation;
+    psa_hash_operation_t hash_operation = PSA_HASH_OPERATION_INIT;
     size_t hash_len;
     psa_algorithm_t hash_alg = mbedtls_psa_translate_md( ctx->md_alg );
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
diff --git a/programs/psa/crypto_examples.c b/programs/psa/crypto_examples.c
index 9947a70..0908756 100644
--- a/programs/psa/crypto_examples.c
+++ b/programs/psa/crypto_examples.c
@@ -109,7 +109,7 @@
                                     size_t *output_len )
 {
     psa_status_t status;
-    psa_cipher_operation_t operation;
+    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
     size_t iv_len = 0;
 
     memset( &operation, 0, sizeof( operation ) );
@@ -140,7 +140,7 @@
                                     size_t *output_len )
 {
     psa_status_t status;
-    psa_cipher_operation_t operation;
+    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
 
     memset( &operation, 0, sizeof( operation ) );
     status = psa_cipher_decrypt_setup( &operation, key_handle, alg );
diff --git a/tests/suites/test_suite_psa_crypto.data b/tests/suites/test_suite_psa_crypto.data
index 83ce158..65ac6d7 100644
--- a/tests/suites/test_suite_psa_crypto.data
+++ b/tests/suites/test_suite_psa_crypto.data
@@ -655,6 +655,7 @@
 hash_setup:PSA_ALG_HMAC(PSA_ALG_SHA_256):PSA_ERROR_INVALID_ARGUMENT
 
 PSA hash: bad order function calls
+depends_on:MBEDTLS_MD_C:MBEDTLS_SHA256_C
 hash_bad_order:
 
 PSA hash verify: bad arguments
@@ -705,6 +706,10 @@
 # Either INVALID_ARGUMENT or NOT_SUPPORTED would be reasonable here
 mac_setup:PSA_KEY_TYPE_HMAC:"000102030405060708090a0b0c0d0e0f":PSA_ALG_CMAC:PSA_ERROR_NOT_SUPPORTED
 
+PSA MAC: bad order function calls
+depends_on:MBEDTLS_MD_C:MBEDTLS_SHA256_C
+mac_bad_order:
+
 PSA MAC sign: RFC4231 Test case 1 - HMAC-SHA-224
 depends_on:MBEDTLS_MD_C:MBEDTLS_SHA256_C
 mac_sign:PSA_KEY_TYPE_HMAC:"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b":PSA_ALG_HMAC(PSA_ALG_SHA_224):"4869205468657265":"896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22"
@@ -922,6 +927,10 @@
 # Either INVALID_ARGUMENT or NOT_SUPPORTED would be reasonable here
 cipher_setup:PSA_KEY_TYPE_ARC4:"000102030405060708090a0b0c0d0e0f":PSA_ALG_CTR:PSA_ERROR_NOT_SUPPORTED
 
+PSA cipher: bad order function calls
+depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
+cipher_bad_order:
+
 PSA symmetric encrypt: AES-CBC-nopad, 16 bytes, good
 depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
 cipher_encrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"6bc1bee22e409f96e93d7e117393172a":"a076ec9dfbe47d52afc357336f20743b":PSA_SUCCESS
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index d900f4d..5c662d8 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -1950,6 +1950,7 @@
 /* BEGIN_CASE */
 void hash_operation_init( )
 {
+    const uint8_t input[1] = { 0 };
     /* Test each valid way of initializing the object, except for `= {0}`, as
      * Clang 5 complains when `-Wmissing-field-initializers` is used, even
      * though it's OK by the C standard. We could test for this, but we'd need
@@ -1960,6 +1961,14 @@
 
     memset( &zero, 0, sizeof( zero ) );
 
+    /* A freshly-initialized hash operation should not be usable. */
+    TEST_EQUAL( psa_hash_update( &func, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    TEST_EQUAL( psa_hash_update( &init, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    TEST_EQUAL( psa_hash_update( &zero, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+
     /* A default hash operation should be abortable without error. */
     PSA_ASSERT( psa_hash_abort( &func ) );
     PSA_ASSERT( psa_hash_abort( &init ) );
@@ -1990,32 +1999,85 @@
 /* BEGIN_CASE */
 void hash_bad_order( )
 {
+    psa_algorithm_t alg = PSA_ALG_SHA_256;
     unsigned char input[] = "";
     /* SHA-256 hash of an empty string */
-    unsigned char hash[] = {
+    const unsigned char valid_hash[] = {
         0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,
         0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
         0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 };
+    unsigned char hash[sizeof(valid_hash)] = { 0 };
     size_t hash_len;
     psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
 
     PSA_ASSERT( psa_crypto_init( ) );
 
-    /* psa_hash_update without calling psa_hash_setup beforehand */
-    memset( &operation, 0, sizeof( operation ) );
+    /* Call setup twice in a row. */
+    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
+    TEST_EQUAL( psa_hash_setup( &operation, alg ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
+
+    /* Call update without calling setup beforehand. */
     TEST_EQUAL( psa_hash_update( &operation, input, sizeof( input ) ),
-                PSA_ERROR_INVALID_ARGUMENT );
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
 
-    /* psa_hash_verify without calling psa_hash_setup beforehand */
-    memset( &operation, 0, sizeof( operation ) );
-    TEST_EQUAL( psa_hash_verify( &operation, hash, sizeof( hash ) ),
-                PSA_ERROR_INVALID_ARGUMENT );
+    /* Call update after finish. */
+    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
+    PSA_ASSERT( psa_hash_finish( &operation,
+                                 hash, sizeof( hash ), &hash_len ) );
+    TEST_EQUAL( psa_hash_update( &operation, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
 
-    /* psa_hash_finish without calling psa_hash_setup beforehand */
-    memset( &operation, 0, sizeof( operation ) );
+    /* Call verify without calling setup beforehand. */
+    TEST_EQUAL( psa_hash_verify( &operation,
+                                 valid_hash, sizeof( valid_hash ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
+
+    /* Call verify after finish. */
+    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
+    PSA_ASSERT( psa_hash_finish( &operation,
+                                 hash, sizeof( hash ), &hash_len ) );
+    TEST_EQUAL( psa_hash_verify( &operation,
+                                 valid_hash, sizeof( valid_hash ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
+
+    /* Call verify twice in a row. */
+    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
+    PSA_ASSERT( psa_hash_verify( &operation,
+                                 valid_hash, sizeof( valid_hash ) ) );
+    TEST_EQUAL( psa_hash_verify( &operation,
+                                 valid_hash, sizeof( valid_hash ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
+
+    /* Call finish without calling setup beforehand. */
     TEST_EQUAL( psa_hash_finish( &operation,
                                  hash, sizeof( hash ), &hash_len ),
-                PSA_ERROR_INVALID_ARGUMENT );
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
+
+    /* Call finish twice in a row. */
+    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
+    PSA_ASSERT( psa_hash_finish( &operation,
+                                 hash, sizeof( hash ), &hash_len ) );
+    TEST_EQUAL( psa_hash_finish( &operation,
+                                 hash, sizeof( hash ), &hash_len ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
+
+    /* Call finish after calling verify. */
+    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
+    PSA_ASSERT( psa_hash_verify( &operation,
+                                 valid_hash, sizeof( valid_hash ) ) );
+    TEST_EQUAL( psa_hash_finish( &operation,
+                                 hash, sizeof( hash ), &hash_len ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_hash_abort( &operation ) );
 
 exit:
     mbedtls_psa_crypto_free( );
@@ -2168,6 +2230,8 @@
 /* BEGIN_CASE */
 void mac_operation_init( )
 {
+    const uint8_t input[1] = { 0 };
+
     /* Test each valid way of initializing the object, except for `= {0}`, as
      * Clang 5 complains when `-Wmissing-field-initializers` is used, even
      * though it's OK by the C standard. We could test for this, but we'd need
@@ -2178,6 +2242,17 @@
 
     memset( &zero, 0, sizeof( zero ) );
 
+    /* A freshly-initialized MAC operation should not be usable. */
+    TEST_EQUAL( psa_mac_update( &func,
+                                input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    TEST_EQUAL( psa_mac_update( &init,
+                                input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    TEST_EQUAL( psa_mac_update( &zero,
+                                input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+
     /* A default MAC operation should be abortable without error. */
     PSA_ASSERT( psa_mac_abort( &func ) );
     PSA_ASSERT( psa_mac_abort( &init ) );
@@ -2221,6 +2296,130 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
+void mac_bad_order( )
+{
+    psa_key_handle_t handle = 0;
+    psa_key_type_t key_type = PSA_KEY_TYPE_HMAC;
+    psa_algorithm_t alg = PSA_ALG_HMAC(PSA_ALG_SHA_256);
+    const uint8_t key[] = {
+        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa };
+    psa_key_policy_t policy = PSA_KEY_POLICY_INIT;
+    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
+    uint8_t sign_mac[PSA_MAC_MAX_SIZE + 10] = { 0 };
+    size_t sign_mac_length = 0;
+    const uint8_t input[] = { 0xbb, 0xbb, 0xbb, 0xbb };
+    const uint8_t verify_mac[] = {
+        0x74, 0x65, 0x93, 0x8c, 0xeb, 0x1d, 0xb3, 0x76, 0x5a, 0x38, 0xe7, 0xdd,
+        0x85, 0xc5, 0xad, 0x4f, 0x07, 0xe7, 0xd5, 0xb2, 0x64, 0xf0, 0x1a, 0x1a,
+        0x2c, 0xf9, 0x18, 0xca, 0x59, 0x7e, 0x5d, 0xf6 };
+
+    PSA_ASSERT( psa_crypto_init( ) );
+    PSA_ASSERT( psa_allocate_key( &handle ) );
+    psa_key_policy_set_usage( &policy,
+                              PSA_KEY_USAGE_SIGN | PSA_KEY_USAGE_VERIFY,
+                              alg );
+    PSA_ASSERT( psa_set_key_policy( handle, &policy ) );
+
+    PSA_ASSERT( psa_import_key( handle, key_type,
+                                key, sizeof(key) ) );
+
+    /* Call update without calling setup beforehand. */
+    TEST_EQUAL( psa_mac_update( &operation, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call sign finish without calling setup beforehand. */
+    TEST_EQUAL( psa_mac_sign_finish( &operation, sign_mac, sizeof( sign_mac ),
+                                     &sign_mac_length),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call verify finish without calling setup beforehand. */
+    TEST_EQUAL( psa_mac_verify_finish( &operation,
+                                       verify_mac, sizeof( verify_mac ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call setup twice in a row. */
+    PSA_ASSERT( psa_mac_sign_setup( &operation,
+                                    handle, alg ) );
+    TEST_EQUAL( psa_mac_sign_setup( &operation,
+                                    handle, alg ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call update after sign finish. */
+    PSA_ASSERT( psa_mac_sign_setup( &operation,
+                                    handle, alg ) );
+    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
+    PSA_ASSERT( psa_mac_sign_finish( &operation,
+                                     sign_mac, sizeof( sign_mac ),
+                                     &sign_mac_length ) );
+    TEST_EQUAL( psa_mac_update( &operation, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call update after verify finish. */
+    PSA_ASSERT( psa_mac_verify_setup( &operation,
+                                    handle, alg ) );
+    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
+    PSA_ASSERT( psa_mac_verify_finish( &operation,
+                                       verify_mac, sizeof( verify_mac ) ) );
+    TEST_EQUAL( psa_mac_update( &operation, input, sizeof( input ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call sign finish twice in a row. */
+    PSA_ASSERT( psa_mac_sign_setup( &operation,
+                                    handle, alg ) );
+    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
+    PSA_ASSERT( psa_mac_sign_finish( &operation,
+                                     sign_mac, sizeof( sign_mac ),
+                                     &sign_mac_length ) );
+    TEST_EQUAL( psa_mac_sign_finish( &operation,
+                                     sign_mac, sizeof( sign_mac ),
+                                     &sign_mac_length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Call verify finish twice in a row. */
+    PSA_ASSERT( psa_mac_verify_setup( &operation,
+                                    handle, alg ) );
+    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
+    PSA_ASSERT( psa_mac_verify_finish( &operation,
+                                       verify_mac, sizeof( verify_mac ) ) );
+    TEST_EQUAL( psa_mac_verify_finish( &operation,
+                                       verify_mac, sizeof( verify_mac ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Setup sign but try verify. */
+    PSA_ASSERT( psa_mac_sign_setup( &operation,
+                                    handle, alg ) );
+    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
+    TEST_EQUAL( psa_mac_verify_finish( &operation,
+                                       verify_mac, sizeof( verify_mac ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+    /* Setup verify but try sign. */
+    PSA_ASSERT( psa_mac_verify_setup( &operation,
+                                    handle, alg ) );
+    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
+    TEST_EQUAL( psa_mac_sign_finish( &operation,
+                                     sign_mac, sizeof( sign_mac ),
+                                     &sign_mac_length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_mac_abort( &operation ) );
+
+exit:
+    mbedtls_psa_crypto_free( );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
 void mac_sign( int key_type_arg,
                data_t *key,
                int alg_arg,
@@ -2318,6 +2517,9 @@
 /* BEGIN_CASE */
 void cipher_operation_init( )
 {
+    const uint8_t input[1] = { 0 };
+    unsigned char output[1] = { 0 };
+    size_t output_length;
     /* Test each valid way of initializing the object, except for `= {0}`, as
      * Clang 5 complains when `-Wmissing-field-initializers` is used, even
      * though it's OK by the C standard. We could test for this, but we'd need
@@ -2328,6 +2530,23 @@
 
     memset( &zero, 0, sizeof( zero ) );
 
+    /* A freshly-initialized cipher operation should not be usable. */
+    TEST_EQUAL( psa_cipher_update( &func,
+                                   input, sizeof( input ),
+                                   output, sizeof( output ),
+                                   &output_length ),
+                PSA_ERROR_BAD_STATE );
+    TEST_EQUAL( psa_cipher_update( &init,
+                                   input, sizeof( input ),
+                                   output, sizeof( output ),
+                                   &output_length ),
+                PSA_ERROR_BAD_STATE );
+    TEST_EQUAL( psa_cipher_update( &zero,
+                                   input, sizeof( input ),
+                                   output, sizeof( output ),
+                                   &output_length ),
+                PSA_ERROR_BAD_STATE );
+
     /* A default cipher operation should be abortable without error. */
     PSA_ASSERT( psa_cipher_abort( &func ) );
     PSA_ASSERT( psa_cipher_abort( &init ) );
@@ -2369,6 +2588,159 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
+void cipher_bad_order( )
+{
+    psa_key_handle_t handle = 0;
+    psa_key_type_t key_type = PSA_KEY_TYPE_AES;
+    psa_algorithm_t alg = PSA_ALG_CBC_PKCS7;
+    psa_key_policy_t policy = PSA_KEY_POLICY_INIT;
+    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
+    unsigned char iv[PSA_BLOCK_CIPHER_BLOCK_SIZE(PSA_KEY_TYPE_AES)] = { 0 };
+    const uint8_t key[] = {
+        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+        0xaa, 0xaa, 0xaa, 0xaa };
+    const uint8_t text[] = {
+        0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
+        0xbb, 0xbb, 0xbb, 0xbb };
+    uint8_t buffer[PSA_BLOCK_CIPHER_BLOCK_SIZE(PSA_KEY_TYPE_AES)] = { 0 };
+    size_t length = 0;
+
+    PSA_ASSERT( psa_crypto_init( ) );
+    PSA_ASSERT( psa_allocate_key( &handle ) );
+    psa_key_policy_set_usage( &policy,
+                              PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT,
+                              alg );
+    PSA_ASSERT( psa_set_key_policy( handle, &policy ) );
+    PSA_ASSERT( psa_import_key( handle, key_type,
+                                key, sizeof(key) ) );
+
+
+    /* Call encrypt setup twice in a row. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    TEST_EQUAL( psa_cipher_encrypt_setup( &operation, handle, alg ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call decrypt setup twice in a row. */
+    PSA_ASSERT( psa_cipher_decrypt_setup( &operation, handle, alg ) );
+    TEST_EQUAL( psa_cipher_decrypt_setup( &operation, handle, alg ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Generate an IV without calling setup beforehand. */
+    TEST_EQUAL( psa_cipher_generate_iv( &operation,
+                                        buffer, sizeof( buffer ),
+                                        &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Generate an IV twice in a row. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    PSA_ASSERT( psa_cipher_generate_iv( &operation,
+                                        buffer, sizeof( buffer ),
+                                        &length ) );
+    TEST_EQUAL( psa_cipher_generate_iv( &operation,
+                                        buffer, sizeof( buffer ),
+                                        &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Generate an IV after it's already set. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    PSA_ASSERT( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ) );
+    TEST_EQUAL( psa_cipher_generate_iv( &operation,
+                                        buffer, sizeof( buffer ),
+                                        &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Set an IV without calling setup beforehand. */
+    TEST_EQUAL( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Set an IV after it's already set. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    PSA_ASSERT( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ) );
+    TEST_EQUAL( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Set an IV after it's already generated. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    PSA_ASSERT( psa_cipher_generate_iv( &operation,
+                                        buffer, sizeof( buffer ),
+                                        &length ) );
+    TEST_EQUAL( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call update without calling setup beforehand. */
+    TEST_EQUAL( psa_cipher_update( &operation,
+                                   text, sizeof( text ),
+                                   buffer, sizeof( buffer ),
+                                   &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call update without an IV where an IV is required. */
+    TEST_EQUAL( psa_cipher_update( &operation,
+                                   text, sizeof( text ),
+                                   buffer, sizeof( buffer ),
+                                   &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call update after finish. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    PSA_ASSERT( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ) );
+    PSA_ASSERT( psa_cipher_finish( &operation,
+                                   buffer, sizeof( buffer ), &length ) );
+    TEST_EQUAL( psa_cipher_update( &operation,
+                                   text, sizeof( text ),
+                                   buffer, sizeof( buffer ),
+                                   &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call finish without calling setup beforehand. */
+    TEST_EQUAL( psa_cipher_finish( &operation,
+                                   buffer, sizeof( buffer ), &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call finish without an IV where an IV is required. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    /* Not calling update means we are encrypting an empty buffer, which is OK
+     * for cipher modes with padding. */
+    TEST_EQUAL( psa_cipher_finish( &operation,
+                                   buffer, sizeof( buffer ), &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+    /* Call finish twice in a row. */
+    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, handle, alg ) );
+    PSA_ASSERT( psa_cipher_set_iv( &operation,
+                                   iv, sizeof( iv ) ) );
+    PSA_ASSERT( psa_cipher_finish( &operation,
+                                   buffer, sizeof( buffer ), &length ) );
+    TEST_EQUAL( psa_cipher_finish( &operation,
+                                   buffer, sizeof( buffer ), &length ),
+                PSA_ERROR_BAD_STATE );
+    PSA_ASSERT( psa_cipher_abort( &operation ) );
+
+exit:
+    mbedtls_psa_crypto_free( );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
 void cipher_encrypt( int alg_arg, int key_type_arg,
                      data_t *key,
                      data_t *input, data_t *expected_output,