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crypto_sizes.h
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23/*
24 * Copyright The Mbed TLS Contributors
25 * SPDX-License-Identifier: Apache-2.0
26 *
27 * Licensed under the Apache License, Version 2.0 (the "License"); you may
28 * not use this file except in compliance with the License.
29 * You may obtain a copy of the License at
30 *
31 * http://www.apache.org/licenses/LICENSE-2.0
32 *
33 * Unless required by applicable law or agreed to in writing, software
34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
36 * See the License for the specific language governing permissions and
37 * limitations under the License.
38 */
39
40#ifndef PSA_CRYPTO_SIZES_H
41#define PSA_CRYPTO_SIZES_H
42
43/* Include the Mbed TLS configuration file, the way Mbed TLS does it
44 * in each of its header files. */
45#include "mbedtls/build_info.h"
46
47#define PSA_BITS_TO_BYTES(bits) (((bits) + 7) / 8)
48#define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8)
49
50#define PSA_ROUND_UP_TO_MULTIPLE(block_size, length) \
51 (((length) + (block_size) - 1) / (block_size) * (block_size))
52
65#define PSA_HASH_LENGTH(alg) \
66 ( \
67 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16 : \
68 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20 : \
69 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20 : \
70 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28 : \
71 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32 : \
72 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48 : \
73 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64 : \
74 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28 : \
75 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32 : \
76 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28 : \
77 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32 : \
78 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48 : \
79 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64 : \
80 0)
81
97#define PSA_HASH_BLOCK_LENGTH(alg) \
98 ( \
99 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 64 : \
100 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 64 : \
101 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 64 : \
102 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 64 : \
103 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 64 : \
104 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 128 : \
105 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 128 : \
106 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 128 : \
107 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 128 : \
108 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 144 : \
109 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 136 : \
110 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 104 : \
111 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 72 : \
112 0)
113
121/* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-226,
122 * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
123 * HMAC-SHA3-512. */
124#if defined(PSA_WANT_ALG_SHA_512) || defined(PSA_WANT_ALG_SHA_384)
125#define PSA_HASH_MAX_SIZE 64
126#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128
127#else
128#define PSA_HASH_MAX_SIZE 32
129#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64
130#endif
131
139/* All non-HMAC MACs have a maximum size that's smaller than the
140 * minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */
141/* Note that the encoding of truncated MAC algorithms limits this value
142 * to 64 bytes.
143 */
144#define PSA_MAC_MAX_SIZE PSA_HASH_MAX_SIZE
145
167#define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg) \
168 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
169 PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
170 ((void) (key_bits), 0))
171
176#define PSA_AEAD_TAG_MAX_SIZE 16
177
178/* The maximum size of an RSA key on this implementation, in bits.
179 * This is a vendor-specific macro.
180 *
181 * Mbed TLS does not set a hard limit on the size of RSA keys: any key
182 * whose parameters fit in a bignum is accepted. However large keys can
183 * induce a large memory usage and long computation times. Unlike other
184 * auxiliary macros in this file and in crypto.h, which reflect how the
185 * library is configured, this macro defines how the library is
186 * configured. This implementation refuses to import or generate an
187 * RSA key whose size is larger than the value defined here.
188 *
189 * Note that an implementation may set different size limits for different
190 * operations, and does not need to accept all key sizes up to the limit. */
191#define PSA_VENDOR_RSA_MAX_KEY_BITS 4096
192
193/* The maximum size of an ECC key on this implementation, in bits.
194 * This is a vendor-specific macro. */
195#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
196#define PSA_VENDOR_ECC_MAX_CURVE_BITS 521
197#elif defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
198#define PSA_VENDOR_ECC_MAX_CURVE_BITS 512
199#elif defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
200#define PSA_VENDOR_ECC_MAX_CURVE_BITS 448
201#elif defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
202#define PSA_VENDOR_ECC_MAX_CURVE_BITS 384
203#elif defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
204#define PSA_VENDOR_ECC_MAX_CURVE_BITS 384
205#elif defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
206#define PSA_VENDOR_ECC_MAX_CURVE_BITS 256
207#elif defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
208#define PSA_VENDOR_ECC_MAX_CURVE_BITS 256
209#elif defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
210#define PSA_VENDOR_ECC_MAX_CURVE_BITS 256
211#elif defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
212#define PSA_VENDOR_ECC_MAX_CURVE_BITS 255
213#elif defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
214#define PSA_VENDOR_ECC_MAX_CURVE_BITS 224
215#elif defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
216#define PSA_VENDOR_ECC_MAX_CURVE_BITS 224
217#elif defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
218#define PSA_VENDOR_ECC_MAX_CURVE_BITS 192
219#elif defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
220#define PSA_VENDOR_ECC_MAX_CURVE_BITS 192
221#else
222#define PSA_VENDOR_ECC_MAX_CURVE_BITS 0
223#endif
224
240#define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128
241
243#define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16
244
266#define PSA_MAC_LENGTH(key_type, key_bits, alg) \
267 ((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) : \
268 PSA_ALG_IS_HMAC(alg) ? PSA_HASH_LENGTH(PSA_ALG_HMAC_GET_HASH(alg)) : \
269 PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
270 ((void)(key_type), (void)(key_bits), 0))
271
298#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
299 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
300 (plaintext_length) + PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
301 0)
302
321#define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length) \
322 ((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)
323
324
351#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
352 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
353 (ciphertext_length) > PSA_ALG_AEAD_GET_TAG_LENGTH(alg) ? \
354 (ciphertext_length) - PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
355 0)
356
375#define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length) \
376 (ciphertext_length)
377
403#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
404 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 ? \
405 MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CCM) ? 13 : \
406 MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_GCM) ? 12 : \
407 0 : \
408 (key_type) == PSA_KEY_TYPE_CHACHA20 && \
409 MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CHACHA20_POLY1305) ? 12 : \
410 0)
411
423#define PSA_AEAD_NONCE_MAX_SIZE 13
424
451/* For all the AEAD modes defined in this specification, it is possible
452 * to emit output without delay. However, hardware may not always be
453 * capable of this. So for modes based on a block cipher, allow the
454 * implementation to delay the output until it has a full block. */
455#define PSA_AEAD_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
456 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
457 PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
458 PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), (input_length)) : \
459 (input_length) : \
460 0)
461
472#define PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(input_length) \
473 (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)))
474
496#define PSA_AEAD_FINISH_OUTPUT_SIZE(key_type, alg) \
497 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
498 PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
499 PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
500 0)
501
507#define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
508
530#define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \
531 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
532 PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
533 PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
534 0)
535
541#define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
542
543#define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
544 (PSA_ALG_IS_RSA_OAEP(alg) ? \
545 2 * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \
546 11 /*PKCS#1v1.5*/)
547
556#define PSA_ECDSA_SIGNATURE_SIZE(curve_bits) \
557 (PSA_BITS_TO_BYTES(curve_bits) * 2)
558
584#define PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg) \
585 (PSA_KEY_TYPE_IS_RSA(key_type) ? ((void)alg, PSA_BITS_TO_BYTES(key_bits)) : \
586 PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_ECDSA_SIGNATURE_SIZE(key_bits) : \
587 ((void)alg, 0))
588
589#define PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE \
590 PSA_ECDSA_SIGNATURE_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
591
599#define PSA_SIGNATURE_MAX_SIZE \
600 (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE ? \
601 PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
602 PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE)
603
629#define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
630 (PSA_KEY_TYPE_IS_RSA(key_type) ? \
631 ((void)alg, PSA_BITS_TO_BYTES(key_bits)) : \
632 0)
633
639/* This macro assumes that RSA is the only supported asymmetric encryption. */
640#define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE \
641 (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
642
668#define PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
669 (PSA_KEY_TYPE_IS_RSA(key_type) ? \
670 PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) : \
671 0)
672
680#define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE \
681 (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
682
683/* Maximum size of the ASN.1 encoding of an INTEGER with the specified
684 * number of bits.
685 *
686 * This definition assumes that bits <= 2^19 - 9 so that the length field
687 * is at most 3 bytes. The length of the encoding is the length of the
688 * bit string padded to a whole number of bytes plus:
689 * - 1 type byte;
690 * - 1 to 3 length bytes;
691 * - 0 to 1 bytes of leading 0 due to the sign bit.
692 */
693#define PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(bits) \
694 ((bits) / 8 + 5)
695
696/* Maximum size of the export encoding of an RSA public key.
697 * Assumes that the public exponent is less than 2^32.
698 *
699 * RSAPublicKey ::= SEQUENCE {
700 * modulus INTEGER, -- n
701 * publicExponent INTEGER } -- e
702 *
703 * - 4 bytes of SEQUENCE overhead;
704 * - n : INTEGER;
705 * - 7 bytes for the public exponent.
706 */
707#define PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
708 (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) + 11)
709
710/* Maximum size of the export encoding of an RSA key pair.
711 * Assumes thatthe public exponent is less than 2^32 and that the size
712 * difference between the two primes is at most 1 bit.
713 *
714 * RSAPrivateKey ::= SEQUENCE {
715 * version Version, -- 0
716 * modulus INTEGER, -- N-bit
717 * publicExponent INTEGER, -- 32-bit
718 * privateExponent INTEGER, -- N-bit
719 * prime1 INTEGER, -- N/2-bit
720 * prime2 INTEGER, -- N/2-bit
721 * exponent1 INTEGER, -- N/2-bit
722 * exponent2 INTEGER, -- N/2-bit
723 * coefficient INTEGER, -- N/2-bit
724 * }
725 *
726 * - 4 bytes of SEQUENCE overhead;
727 * - 3 bytes of version;
728 * - 7 half-size INTEGERs plus 2 full-size INTEGERs,
729 * overapproximated as 9 half-size INTEGERS;
730 * - 7 bytes for the public exponent.
731 */
732#define PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) \
733 (9 * PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE((key_bits) / 2 + 1) + 14)
734
735/* Maximum size of the export encoding of a DSA public key.
736 *
737 * SubjectPublicKeyInfo ::= SEQUENCE {
738 * algorithm AlgorithmIdentifier,
739 * subjectPublicKey BIT STRING } -- contains DSAPublicKey
740 * AlgorithmIdentifier ::= SEQUENCE {
741 * algorithm OBJECT IDENTIFIER,
742 * parameters Dss-Parms } -- SEQUENCE of 3 INTEGERs
743 * DSAPublicKey ::= INTEGER -- public key, Y
744 *
745 * - 3 * 4 bytes of SEQUENCE overhead;
746 * - 1 + 1 + 7 bytes of algorithm (DSA OID);
747 * - 4 bytes of BIT STRING overhead;
748 * - 3 full-size INTEGERs (p, g, y);
749 * - 1 + 1 + 32 bytes for 1 sub-size INTEGER (q <= 256 bits).
750 */
751#define PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
752 (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3 + 59)
753
754/* Maximum size of the export encoding of a DSA key pair.
755 *
756 * DSAPrivateKey ::= SEQUENCE {
757 * version Version, -- 0
758 * prime INTEGER, -- p
759 * subprime INTEGER, -- q
760 * generator INTEGER, -- g
761 * public INTEGER, -- y
762 * private INTEGER, -- x
763 * }
764 *
765 * - 4 bytes of SEQUENCE overhead;
766 * - 3 bytes of version;
767 * - 3 full-size INTEGERs (p, g, y);
768 * - 2 * (1 + 1 + 32) bytes for 2 sub-size INTEGERs (q, x <= 256 bits).
769 */
770#define PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) \
771 (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3 + 75)
772
773/* Maximum size of the export encoding of an ECC public key.
774 *
775 * The representation of an ECC public key is:
776 * - The byte 0x04;
777 * - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
778 * - `y_P` as a `ceiling(m/8)`-byte string, big-endian;
779 * - where m is the bit size associated with the curve.
780 *
781 * - 1 byte + 2 * point size.
782 */
783#define PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) \
784 (2 * PSA_BITS_TO_BYTES(key_bits) + 1)
785
786/* Maximum size of the export encoding of an ECC key pair.
787 *
788 * An ECC key pair is represented by the secret value.
789 */
790#define PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) \
791 (PSA_BITS_TO_BYTES(key_bits))
792
832#define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \
833 (PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
834 (key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) : \
835 (key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
836 (key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) : \
837 (key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
838 PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) : \
839 PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
840 0)
841
887#define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
888 (PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
889 PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
890 0)
891
900#define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
901 (PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
902 PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
903 PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
904 PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
905
915#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
916 (PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
917 PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
918 PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
919 PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
920
944/* FFDH is not yet supported in PSA. */
945#define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits) \
946 (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? \
947 PSA_BITS_TO_BYTES(key_bits) : \
948 0)
949
957#define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE \
958 (PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS))
959
984#define PSA_CIPHER_IV_LENGTH(key_type, alg) \
985 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
986 ((alg) == PSA_ALG_CTR || \
987 (alg) == PSA_ALG_CFB || \
988 (alg) == PSA_ALG_OFB || \
989 (alg) == PSA_ALG_XTS || \
990 (alg) == PSA_ALG_CBC_NO_PADDING || \
991 (alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
992 (key_type) == PSA_KEY_TYPE_CHACHA20 && \
993 (alg) == PSA_ALG_STREAM_CIPHER ? 12 : \
994 (alg) == PSA_ALG_CCM_STAR_NO_TAG ? 13 : \
995 0)
996
1001#define PSA_CIPHER_IV_MAX_SIZE 16
1002
1026#define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1027 (alg == PSA_ALG_CBC_PKCS7 ? \
1028 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1029 PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1030 (input_length) + 1) + \
1031 PSA_CIPHER_IV_LENGTH((key_type), (alg)) : 0) : \
1032 (PSA_ALG_IS_CIPHER(alg) ? \
1033 (input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
1034 0))
1035
1047#define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length) \
1048 (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, \
1049 (input_length) + 1) + \
1050 PSA_CIPHER_IV_MAX_SIZE)
1051
1071#define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1072 (PSA_ALG_IS_CIPHER(alg) && \
1073 ((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
1074 (input_length) : \
1075 0)
1076
1087#define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length) \
1088 (input_length)
1089
1108#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
1109 (PSA_ALG_IS_CIPHER(alg) ? \
1110 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1111 (((alg) == PSA_ALG_CBC_PKCS7 || \
1112 (alg) == PSA_ALG_CBC_NO_PADDING || \
1113 (alg) == PSA_ALG_ECB_NO_PADDING) ? \
1114 PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1115 input_length) : \
1116 (input_length)) : 0) : \
1117 0)
1118
1129#define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
1130 (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, input_length))
1131
1149#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
1150 (PSA_ALG_IS_CIPHER(alg) ? \
1151 (alg == PSA_ALG_CBC_PKCS7 ? \
1152 PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1153 0) : \
1154 0)
1155
1161#define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE \
1162 (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
1163
1164#endif /* PSA_CRYPTO_SIZES_H */