mbed TLS v2.28.2
crypto_sizes.h
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1 
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 #if !defined(MBEDTLS_CONFIG_FILE)
46 #include "mbedtls/config.h"
47 #else
48 #include MBEDTLS_CONFIG_FILE
49 #endif
50 
51 #define PSA_BITS_TO_BYTES(bits) (((bits) + 7) / 8)
52 #define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8)
53 
54 #define PSA_ROUND_UP_TO_MULTIPLE(block_size, length) \
55  (((length) + (block_size) - 1) / (block_size) * (block_size))
56 
69 #define PSA_HASH_LENGTH(alg) \
70  ( \
71  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD2 ? 16 : \
72  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD4 ? 16 : \
73  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16 : \
74  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20 : \
75  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20 : \
76  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28 : \
77  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32 : \
78  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48 : \
79  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64 : \
80  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28 : \
81  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32 : \
82  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28 : \
83  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32 : \
84  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48 : \
85  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64 : \
86  0)
87 
103 #define PSA_HASH_BLOCK_LENGTH(alg) \
104  ( \
105  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD2 ? 16 : \
106  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD4 ? 64 : \
107  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 64 : \
108  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 64 : \
109  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 64 : \
110  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 64 : \
111  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 64 : \
112  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 128 : \
113  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 128 : \
114  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 128 : \
115  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 128 : \
116  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 144 : \
117  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 136 : \
118  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 104 : \
119  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 72 : \
120  0)
121 
129 /* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-226,
130  * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
131  * HMAC-SHA3-512. */
132 #if defined(PSA_WANT_ALG_SHA_512) || defined(PSA_WANT_ALG_SHA_384)
133 #define PSA_HASH_MAX_SIZE 64
134 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128
135 #else
136 #define PSA_HASH_MAX_SIZE 32
137 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64
138 #endif
139 
147 /* All non-HMAC MACs have a maximum size that's smaller than the
148  * minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */
149 /* Note that the encoding of truncated MAC algorithms limits this value
150  * to 64 bytes.
151  */
152 #define PSA_MAC_MAX_SIZE PSA_HASH_MAX_SIZE
153 
175 #define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg) \
176  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
177  PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
178  ((void) (key_bits), 0))
179 
184 #define PSA_AEAD_TAG_MAX_SIZE 16
185 
186 /* The maximum size of an RSA key on this implementation, in bits.
187  * This is a vendor-specific macro.
188  *
189  * Mbed TLS does not set a hard limit on the size of RSA keys: any key
190  * whose parameters fit in a bignum is accepted. However large keys can
191  * induce a large memory usage and long computation times. Unlike other
192  * auxiliary macros in this file and in crypto.h, which reflect how the
193  * library is configured, this macro defines how the library is
194  * configured. This implementation refuses to import or generate an
195  * RSA key whose size is larger than the value defined here.
196  *
197  * Note that an implementation may set different size limits for different
198  * operations, and does not need to accept all key sizes up to the limit. */
199 #define PSA_VENDOR_RSA_MAX_KEY_BITS 4096
200 
201 /* The maximum size of an ECC key on this implementation, in bits.
202  * This is a vendor-specific macro. */
203 #if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
204 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 521
205 #elif defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
206 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 512
207 #elif defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
208 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 448
209 #elif defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
210 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 384
211 #elif defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
212 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 384
213 #elif defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
214 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256
215 #elif defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
216 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256
217 #elif defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
218 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256
219 #elif defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
220 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 255
221 #elif defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
222 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 224
223 #elif defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
224 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 224
225 #elif defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
226 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 192
227 #elif defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
228 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 192
229 #else
230 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 0
231 #endif
232 
248 #define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128
249 
251 #define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16
252 
274 #define PSA_MAC_LENGTH(key_type, key_bits, alg) \
275  ((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) : \
276  PSA_ALG_IS_HMAC(alg) ? PSA_HASH_LENGTH(PSA_ALG_HMAC_GET_HASH(alg)) : \
277  PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
278  ((void)(key_type), (void)(key_bits), 0))
279 
306 #define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
307  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
308  (plaintext_length) + PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
309  0)
310 
329 #define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length) \
330  ((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)
331 
332 
359 #define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
360  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
361  (ciphertext_length) > PSA_ALG_AEAD_GET_TAG_LENGTH(alg) ? \
362  (ciphertext_length) - PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
363  0)
364 
383 #define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length) \
384  (ciphertext_length)
385 
411 #define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
412  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 ? \
413  MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CCM) ? 13 : \
414  MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_GCM) ? 12 : \
415  0 : \
416  (key_type) == PSA_KEY_TYPE_CHACHA20 && \
417  MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CHACHA20_POLY1305) ? 12 : \
418  0)
419 
431 #define PSA_AEAD_NONCE_MAX_SIZE 13
432 
459 /* For all the AEAD modes defined in this specification, it is possible
460  * to emit output without delay. However, hardware may not always be
461  * capable of this. So for modes based on a block cipher, allow the
462  * implementation to delay the output until it has a full block. */
463 #define PSA_AEAD_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
464  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
465  PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
466  PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), (input_length)) : \
467  (input_length) : \
468  0)
469 
480 #define PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(input_length) \
481  (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)))
482 
504 #define PSA_AEAD_FINISH_OUTPUT_SIZE(key_type, alg) \
505  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
506  PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
507  PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
508  0)
509 
515 #define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
516 
538 #define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \
539  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
540  PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
541  PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
542  0)
543 
549 #define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
550 
551 #define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
552  (PSA_ALG_IS_RSA_OAEP(alg) ? \
553  2 * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \
554  11 /*PKCS#1v1.5*/)
555 
564 #define PSA_ECDSA_SIGNATURE_SIZE(curve_bits) \
565  (PSA_BITS_TO_BYTES(curve_bits) * 2)
566 
592 #define PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg) \
593  (PSA_KEY_TYPE_IS_RSA(key_type) ? ((void)alg, PSA_BITS_TO_BYTES(key_bits)) : \
594  PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_ECDSA_SIGNATURE_SIZE(key_bits) : \
595  ((void)alg, 0))
596 
597 #define PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE \
598  PSA_ECDSA_SIGNATURE_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
599 
607 #define PSA_SIGNATURE_MAX_SIZE \
608  (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE ? \
609  PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
610  PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE)
611 
637 #define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
638  (PSA_KEY_TYPE_IS_RSA(key_type) ? \
639  ((void)alg, PSA_BITS_TO_BYTES(key_bits)) : \
640  0)
641 
647 /* This macro assumes that RSA is the only supported asymmetric encryption. */
648 #define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE \
649  (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
650 
676 #define PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
677  (PSA_KEY_TYPE_IS_RSA(key_type) ? \
678  PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) : \
679  0)
680 
688 #define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE \
689  (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
690 
691 /* Maximum size of the ASN.1 encoding of an INTEGER with the specified
692  * number of bits.
693  *
694  * This definition assumes that bits <= 2^19 - 9 so that the length field
695  * is at most 3 bytes. The length of the encoding is the length of the
696  * bit string padded to a whole number of bytes plus:
697  * - 1 type byte;
698  * - 1 to 3 length bytes;
699  * - 0 to 1 bytes of leading 0 due to the sign bit.
700  */
701 #define PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(bits) \
702  ((bits) / 8 + 5)
703 
704 /* Maximum size of the export encoding of an RSA public key.
705  * Assumes that the public exponent is less than 2^32.
706  *
707  * RSAPublicKey ::= SEQUENCE {
708  * modulus INTEGER, -- n
709  * publicExponent INTEGER } -- e
710  *
711  * - 4 bytes of SEQUENCE overhead;
712  * - n : INTEGER;
713  * - 7 bytes for the public exponent.
714  */
715 #define PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
716  (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) + 11)
717 
718 /* Maximum size of the export encoding of an RSA key pair.
719  * Assumes that the public exponent is less than 2^32 and that the size
720  * difference between the two primes is at most 1 bit.
721  *
722  * RSAPrivateKey ::= SEQUENCE {
723  * version Version, -- 0
724  * modulus INTEGER, -- N-bit
725  * publicExponent INTEGER, -- 32-bit
726  * privateExponent INTEGER, -- N-bit
727  * prime1 INTEGER, -- N/2-bit
728  * prime2 INTEGER, -- N/2-bit
729  * exponent1 INTEGER, -- N/2-bit
730  * exponent2 INTEGER, -- N/2-bit
731  * coefficient INTEGER, -- N/2-bit
732  * }
733  *
734  * - 4 bytes of SEQUENCE overhead;
735  * - 3 bytes of version;
736  * - 7 half-size INTEGERs plus 2 full-size INTEGERs,
737  * overapproximated as 9 half-size INTEGERS;
738  * - 7 bytes for the public exponent.
739  */
740 #define PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) \
741  (9 * PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE((key_bits) / 2 + 1) + 14)
742 
743 /* Maximum size of the export encoding of a DSA public key.
744  *
745  * SubjectPublicKeyInfo ::= SEQUENCE {
746  * algorithm AlgorithmIdentifier,
747  * subjectPublicKey BIT STRING } -- contains DSAPublicKey
748  * AlgorithmIdentifier ::= SEQUENCE {
749  * algorithm OBJECT IDENTIFIER,
750  * parameters Dss-Params } -- SEQUENCE of 3 INTEGERs
751  * DSAPublicKey ::= INTEGER -- public key, Y
752  *
753  * - 3 * 4 bytes of SEQUENCE overhead;
754  * - 1 + 1 + 7 bytes of algorithm (DSA OID);
755  * - 4 bytes of BIT STRING overhead;
756  * - 3 full-size INTEGERs (p, g, y);
757  * - 1 + 1 + 32 bytes for 1 sub-size INTEGER (q <= 256 bits).
758  */
759 #define PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
760  (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3 + 59)
761 
762 /* Maximum size of the export encoding of a DSA key pair.
763  *
764  * DSAPrivateKey ::= SEQUENCE {
765  * version Version, -- 0
766  * prime INTEGER, -- p
767  * subprime INTEGER, -- q
768  * generator INTEGER, -- g
769  * public INTEGER, -- y
770  * private INTEGER, -- x
771  * }
772  *
773  * - 4 bytes of SEQUENCE overhead;
774  * - 3 bytes of version;
775  * - 3 full-size INTEGERs (p, g, y);
776  * - 2 * (1 + 1 + 32) bytes for 2 sub-size INTEGERs (q, x <= 256 bits).
777  */
778 #define PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) \
779  (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3 + 75)
780 
781 /* Maximum size of the export encoding of an ECC public key.
782  *
783  * The representation of an ECC public key is:
784  * - The byte 0x04;
785  * - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
786  * - `y_P` as a `ceiling(m/8)`-byte string, big-endian;
787  * - where m is the bit size associated with the curve.
788  *
789  * - 1 byte + 2 * point size.
790  */
791 #define PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) \
792  (2 * PSA_BITS_TO_BYTES(key_bits) + 1)
793 
794 /* Maximum size of the export encoding of an ECC key pair.
795  *
796  * An ECC key pair is represented by the secret value.
797  */
798 #define PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) \
799  (PSA_BITS_TO_BYTES(key_bits))
800 
840 #define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \
841  (PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
842  (key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) : \
843  (key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
844  (key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) : \
845  (key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
846  PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) : \
847  PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
848  0)
849 
895 #define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
896  (PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
897  PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
898  0)
899 
908 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
909  (PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
910  PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
911  PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
912  PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
913 
923 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
924  (PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
925  PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
926  PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
927  PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
928 
952 /* FFDH is not yet supported in PSA. */
953 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits) \
954  (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? \
955  PSA_BITS_TO_BYTES(key_bits) : \
956  0)
957 
965 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE \
966  (PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS))
967 
992 #define PSA_CIPHER_IV_LENGTH(key_type, alg) \
993  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
994  ((alg) == PSA_ALG_CTR || \
995  (alg) == PSA_ALG_CFB || \
996  (alg) == PSA_ALG_OFB || \
997  (alg) == PSA_ALG_XTS || \
998  (alg) == PSA_ALG_CBC_NO_PADDING || \
999  (alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1000  (key_type) == PSA_KEY_TYPE_CHACHA20 && \
1001  (alg) == PSA_ALG_STREAM_CIPHER ? 12 : \
1002  0)
1003 
1008 #define PSA_CIPHER_IV_MAX_SIZE 16
1009 
1033 #define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1034  (alg == PSA_ALG_CBC_PKCS7 ? \
1035  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1036  PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1037  (input_length) + 1) + \
1038  PSA_CIPHER_IV_LENGTH((key_type), (alg)) : 0) : \
1039  (PSA_ALG_IS_CIPHER(alg) ? \
1040  (input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
1041  0))
1042 
1054 #define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length) \
1055  (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, \
1056  (input_length) + 1) + \
1057  PSA_CIPHER_IV_MAX_SIZE)
1058 
1078 #define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1079  (PSA_ALG_IS_CIPHER(alg) && \
1080  ((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
1081  (input_length) : \
1082  0)
1083 
1094 #define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length) \
1095  (input_length)
1096 
1115 #define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
1116  (PSA_ALG_IS_CIPHER(alg) ? \
1117  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1118  (((alg) == PSA_ALG_CBC_PKCS7 || \
1119  (alg) == PSA_ALG_CBC_NO_PADDING || \
1120  (alg) == PSA_ALG_ECB_NO_PADDING) ? \
1121  PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1122  input_length) : \
1123  (input_length)) : 0) : \
1124  0)
1125 
1136 #define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
1137  (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, input_length))
1138 
1156 #define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
1157  (PSA_ALG_IS_CIPHER(alg) ? \
1158  (alg == PSA_ALG_CBC_PKCS7 ? \
1159  PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1160  0) : \
1161  0)
1162 
1168 #define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE \
1169  (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
1170 
1171 #endif /* PSA_CRYPTO_SIZES_H */
Configuration options (set of defines)