Mbed TLS v3.5.0
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 /*
44  * Include the build-time configuration information file. Here, we do not
45  * include `"mbedtls/build_info.h"` directly but `"psa/build_info.h"`, which
46  * is basically just an alias to it. This is to ease the maintenance of the
47  * PSA cryptography repository which has a different build system and
48  * configuration.
49  */
50 #include "psa/build_info.h"
51 
52 #define PSA_BITS_TO_BYTES(bits) (((bits) + 7u) / 8u)
53 #define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8u)
54 #define PSA_MAX_OF_THREE(a, b, c) ((a) <= (b) ? (b) <= (c) ? \
55  (c) : (b) : (a) <= (c) ? (c) : (a))
56 
57 #define PSA_ROUND_UP_TO_MULTIPLE(block_size, length) \
58  (((length) + (block_size) - 1) / (block_size) * (block_size))
59 
72 #define PSA_HASH_LENGTH(alg) \
73  ( \
74  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16u : \
75  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20u : \
76  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20u : \
77  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28u : \
78  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32u : \
79  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48u : \
80  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64u : \
81  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28u : \
82  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32u : \
83  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28u : \
84  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32u : \
85  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48u : \
86  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64u : \
87  0u)
88 
104 #define PSA_HASH_BLOCK_LENGTH(alg) \
105  ( \
106  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 64u : \
107  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 64u : \
108  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 64u : \
109  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 64u : \
110  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 64u : \
111  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 128u : \
112  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 128u : \
113  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 128u : \
114  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 128u : \
115  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 144u : \
116  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 136u : \
117  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 104u : \
118  PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 72u : \
119  0u)
120 
128 /* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-224,
129  * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
130  * HMAC-SHA3-512. */
131 /* Note: PSA_HASH_MAX_SIZE should be kept in sync with MBEDTLS_MD_MAX_SIZE,
132  * see the note on MBEDTLS_MD_MAX_SIZE for details. */
133 #if defined(PSA_WANT_ALG_SHA3_224)
134 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 144u
135 #elif defined(PSA_WANT_ALG_SHA3_256)
136 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 136u
137 #elif defined(PSA_WANT_ALG_SHA_512)
138 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128u
139 #elif defined(PSA_WANT_ALG_SHA_384)
140 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128u
141 #elif defined(PSA_WANT_ALG_SHA3_384)
142 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 104u
143 #elif defined(PSA_WANT_ALG_SHA3_512)
144 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 72u
145 #elif defined(PSA_WANT_ALG_SHA_256)
146 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
147 #elif defined(PSA_WANT_ALG_SHA_224)
148 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
149 #else /* SHA-1 or smaller */
150 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
151 #endif
152 
153 #if defined(PSA_WANT_ALG_SHA_512) || defined(PSA_WANT_ALG_SHA3_512)
154 #define PSA_HASH_MAX_SIZE 64u
155 #elif defined(PSA_WANT_ALG_SHA_384) || defined(PSA_WANT_ALG_SHA3_384)
156 #define PSA_HASH_MAX_SIZE 48u
157 #elif defined(PSA_WANT_ALG_SHA_256) || defined(PSA_WANT_ALG_SHA3_256)
158 #define PSA_HASH_MAX_SIZE 32u
159 #elif defined(PSA_WANT_ALG_SHA_224) || defined(PSA_WANT_ALG_SHA3_224)
160 #define PSA_HASH_MAX_SIZE 28u
161 #else /* SHA-1 or smaller */
162 #define PSA_HASH_MAX_SIZE 20u
163 #endif
164 
172 /* All non-HMAC MACs have a maximum size that's smaller than the
173  * minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */
174 /* Note that the encoding of truncated MAC algorithms limits this value
175  * to 64 bytes.
176  */
177 #define PSA_MAC_MAX_SIZE PSA_HASH_MAX_SIZE
178 
200 #define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg) \
201  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
202  PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
203  ((void) (key_bits), 0u))
204 
209 #define PSA_AEAD_TAG_MAX_SIZE 16u
210 
211 /* The maximum size of an RSA key on this implementation, in bits.
212  * This is a vendor-specific macro.
213  *
214  * Mbed TLS does not set a hard limit on the size of RSA keys: any key
215  * whose parameters fit in a bignum is accepted. However large keys can
216  * induce a large memory usage and long computation times. Unlike other
217  * auxiliary macros in this file and in crypto.h, which reflect how the
218  * library is configured, this macro defines how the library is
219  * configured. This implementation refuses to import or generate an
220  * RSA key whose size is larger than the value defined here.
221  *
222  * Note that an implementation may set different size limits for different
223  * operations, and does not need to accept all key sizes up to the limit. */
224 #define PSA_VENDOR_RSA_MAX_KEY_BITS 4096u
225 
226 /* The minimum size of an RSA key on this implementation, in bits.
227  * This is a vendor-specific macro.
228  *
229  * Limits RSA key generation to a minimum due to avoid accidental misuse.
230  * This value cannot be less than 128 bits.
231  */
232 #if defined(MBEDTLS_RSA_GEN_KEY_MIN_BITS)
233 #define PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS MBEDTLS_RSA_GEN_KEY_MIN_BITS
234 #else
235 #define PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS 1024
236 #endif
237 
238 /* The maximum size of an DH key on this implementation, in bits.
239  *
240  * Note that an implementation may set different size limits for different
241  * operations, and does not need to accept all key sizes up to the limit. */
242 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 8192u
243 
244 /* The maximum size of an ECC key on this implementation, in bits.
245  * This is a vendor-specific macro. */
246 #if defined(PSA_WANT_ECC_SECP_R1_521)
247 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 521u
248 #elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_512)
249 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 512u
250 #elif defined(PSA_WANT_ECC_MONTGOMERY_448)
251 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 448u
252 #elif defined(PSA_WANT_ECC_SECP_R1_384)
253 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 384u
254 #elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_384)
255 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 384u
256 #elif defined(PSA_WANT_ECC_SECP_R1_256)
257 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
258 #elif defined(PSA_WANT_ECC_SECP_K1_256)
259 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
260 #elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_256)
261 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
262 #elif defined(PSA_WANT_ECC_MONTGOMERY_255)
263 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 255u
264 #elif defined(PSA_WANT_ECC_SECP_R1_224)
265 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 224u
266 #elif defined(PSA_WANT_ECC_SECP_K1_224)
267 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 224u
268 #elif defined(PSA_WANT_ECC_SECP_R1_192)
269 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 192u
270 #elif defined(PSA_WANT_ECC_SECP_K1_192)
271 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 192u
272 #else
273 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 0u
274 #endif
275 
291 #define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128u
292 
293 /* The expected size of input passed to psa_tls12_ecjpake_to_pms_input,
294  * which is expected to work with P-256 curve only. */
295 #define PSA_TLS12_ECJPAKE_TO_PMS_INPUT_SIZE 65u
296 
297 /* The size of a serialized K.X coordinate to be used in
298  * psa_tls12_ecjpake_to_pms_input. This function only accepts the P-256
299  * curve. */
300 #define PSA_TLS12_ECJPAKE_TO_PMS_DATA_SIZE 32u
301 
302 /* The maximum number of iterations for PBKDF2 on this implementation, in bits.
303  * This is a vendor-specific macro. This can be configured if necessary */
304 #define PSA_VENDOR_PBKDF2_MAX_ITERATIONS 0xffffffffU
305 
307 #define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16u
308 
330 #define PSA_MAC_LENGTH(key_type, key_bits, alg) \
331  ((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) : \
332  PSA_ALG_IS_HMAC(alg) ? PSA_HASH_LENGTH(PSA_ALG_HMAC_GET_HASH(alg)) : \
333  PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
334  ((void) (key_type), (void) (key_bits), 0u))
335 
362 #define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
363  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
364  (plaintext_length) + PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
365  0u)
366 
385 #define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length) \
386  ((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)
387 
388 
415 #define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
416  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
417  (ciphertext_length) > PSA_ALG_AEAD_GET_TAG_LENGTH(alg) ? \
418  (ciphertext_length) - PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
419  0u)
420 
439 #define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length) \
440  (ciphertext_length)
441 
467 #define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
468  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 ? \
469  MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CCM) ? 13u : \
470  MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_GCM) ? 12u : \
471  0u : \
472  (key_type) == PSA_KEY_TYPE_CHACHA20 && \
473  MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CHACHA20_POLY1305) ? 12u : \
474  0u)
475 
487 #define PSA_AEAD_NONCE_MAX_SIZE 13u
488 
515 /* For all the AEAD modes defined in this specification, it is possible
516  * to emit output without delay. However, hardware may not always be
517  * capable of this. So for modes based on a block cipher, allow the
518  * implementation to delay the output until it has a full block. */
519 #define PSA_AEAD_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
520  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
521  PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
522  PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), (input_length)) : \
523  (input_length) : \
524  0u)
525 
536 #define PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(input_length) \
537  (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)))
538 
560 #define PSA_AEAD_FINISH_OUTPUT_SIZE(key_type, alg) \
561  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
562  PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
563  PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
564  0u)
565 
571 #define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
572 
594 #define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \
595  (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
596  PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
597  PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
598  0u)
599 
605 #define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
606 
607 #define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
608  (PSA_ALG_IS_RSA_OAEP(alg) ? \
609  2u * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1u : \
610  11u /*PKCS#1v1.5*/)
611 
620 #define PSA_ECDSA_SIGNATURE_SIZE(curve_bits) \
621  (PSA_BITS_TO_BYTES(curve_bits) * 2u)
622 
648 #define PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg) \
649  (PSA_KEY_TYPE_IS_RSA(key_type) ? ((void) alg, PSA_BITS_TO_BYTES(key_bits)) : \
650  PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_ECDSA_SIGNATURE_SIZE(key_bits) : \
651  ((void) alg, 0u))
652 
653 #define PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE \
654  PSA_ECDSA_SIGNATURE_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
655 
663 #define PSA_SIGNATURE_MAX_SIZE 1
664 
665 #if (defined(PSA_WANT_ALG_ECDSA) || defined(PSA_WANT_ALG_DETERMINISTIC_ECDSA)) && \
666  (PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE > PSA_SIGNATURE_MAX_SIZE)
667 #undef PSA_SIGNATURE_MAX_SIZE
668 #define PSA_SIGNATURE_MAX_SIZE PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE
669 #endif
670 #if (defined(PSA_WANT_ALG_RSA_PKCS1V15_SIGN) || defined(PSA_WANT_ALG_RSA_PSS)) && \
671  (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_SIGNATURE_MAX_SIZE)
672 #undef PSA_SIGNATURE_MAX_SIZE
673 #define PSA_SIGNATURE_MAX_SIZE PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS)
674 #endif
675 
701 #define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
702  (PSA_KEY_TYPE_IS_RSA(key_type) ? \
703  ((void) alg, PSA_BITS_TO_BYTES(key_bits)) : \
704  0u)
705 
711 /* This macro assumes that RSA is the only supported asymmetric encryption. */
712 #define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE \
713  (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
714 
740 #define PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
741  (PSA_KEY_TYPE_IS_RSA(key_type) ? \
742  PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) : \
743  0u)
744 
752 #define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE \
753  (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
754 
755 /* Maximum size of the ASN.1 encoding of an INTEGER with the specified
756  * number of bits.
757  *
758  * This definition assumes that bits <= 2^19 - 9 so that the length field
759  * is at most 3 bytes. The length of the encoding is the length of the
760  * bit string padded to a whole number of bytes plus:
761  * - 1 type byte;
762  * - 1 to 3 length bytes;
763  * - 0 to 1 bytes of leading 0 due to the sign bit.
764  */
765 #define PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(bits) \
766  ((bits) / 8u + 5u)
767 
768 /* Maximum size of the export encoding of an RSA public key.
769  * Assumes that the public exponent is less than 2^32.
770  *
771  * RSAPublicKey ::= SEQUENCE {
772  * modulus INTEGER, -- n
773  * publicExponent INTEGER } -- e
774  *
775  * - 4 bytes of SEQUENCE overhead;
776  * - n : INTEGER;
777  * - 7 bytes for the public exponent.
778  */
779 #define PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
780  (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) + 11u)
781 
782 /* Maximum size of the export encoding of an RSA key pair.
783  * Assumes that the public exponent is less than 2^32 and that the size
784  * difference between the two primes is at most 1 bit.
785  *
786  * RSAPrivateKey ::= SEQUENCE {
787  * version Version, -- 0
788  * modulus INTEGER, -- N-bit
789  * publicExponent INTEGER, -- 32-bit
790  * privateExponent INTEGER, -- N-bit
791  * prime1 INTEGER, -- N/2-bit
792  * prime2 INTEGER, -- N/2-bit
793  * exponent1 INTEGER, -- N/2-bit
794  * exponent2 INTEGER, -- N/2-bit
795  * coefficient INTEGER, -- N/2-bit
796  * }
797  *
798  * - 4 bytes of SEQUENCE overhead;
799  * - 3 bytes of version;
800  * - 7 half-size INTEGERs plus 2 full-size INTEGERs,
801  * overapproximated as 9 half-size INTEGERS;
802  * - 7 bytes for the public exponent.
803  */
804 #define PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) \
805  (9u * PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE((key_bits) / 2u + 1u) + 14u)
806 
807 /* Maximum size of the export encoding of a DSA public key.
808  *
809  * SubjectPublicKeyInfo ::= SEQUENCE {
810  * algorithm AlgorithmIdentifier,
811  * subjectPublicKey BIT STRING } -- contains DSAPublicKey
812  * AlgorithmIdentifier ::= SEQUENCE {
813  * algorithm OBJECT IDENTIFIER,
814  * parameters Dss-Params } -- SEQUENCE of 3 INTEGERs
815  * DSAPublicKey ::= INTEGER -- public key, Y
816  *
817  * - 3 * 4 bytes of SEQUENCE overhead;
818  * - 1 + 1 + 7 bytes of algorithm (DSA OID);
819  * - 4 bytes of BIT STRING overhead;
820  * - 3 full-size INTEGERs (p, g, y);
821  * - 1 + 1 + 32 bytes for 1 sub-size INTEGER (q <= 256 bits).
822  */
823 #define PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
824  (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3u + 59u)
825 
826 /* Maximum size of the export encoding of a DSA key pair.
827  *
828  * DSAPrivateKey ::= SEQUENCE {
829  * version Version, -- 0
830  * prime INTEGER, -- p
831  * subprime INTEGER, -- q
832  * generator INTEGER, -- g
833  * public INTEGER, -- y
834  * private INTEGER, -- x
835  * }
836  *
837  * - 4 bytes of SEQUENCE overhead;
838  * - 3 bytes of version;
839  * - 3 full-size INTEGERs (p, g, y);
840  * - 2 * (1 + 1 + 32) bytes for 2 sub-size INTEGERs (q, x <= 256 bits).
841  */
842 #define PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) \
843  (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3u + 75u)
844 
845 /* Maximum size of the export encoding of an ECC public key.
846  *
847  * The representation of an ECC public key is:
848  * - The byte 0x04;
849  * - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
850  * - `y_P` as a `ceiling(m/8)`-byte string, big-endian;
851  * - where m is the bit size associated with the curve.
852  *
853  * - 1 byte + 2 * point size.
854  */
855 #define PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) \
856  (2u * PSA_BITS_TO_BYTES(key_bits) + 1u)
857 
858 /* Maximum size of the export encoding of an ECC key pair.
859  *
860  * An ECC key pair is represented by the secret value.
861  */
862 #define PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) \
863  (PSA_BITS_TO_BYTES(key_bits))
864 
865 /* Maximum size of the export encoding of an DH key pair.
866  *
867  * An DH key pair is represented by the secret value.
868  */
869 #define PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(key_bits) \
870  (PSA_BITS_TO_BYTES(key_bits))
871 
872 /* Maximum size of the export encoding of an DH public key.
873  */
874 #define PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(key_bits) \
875  (PSA_BITS_TO_BYTES(key_bits))
876 
916 #define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \
917  (PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
918  PSA_KEY_TYPE_IS_DH(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
919  (key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) : \
920  (key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
921  (key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) : \
922  (key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
923  PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) : \
924  PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
925  0u)
926 
972 #define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
973  (PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
974  PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
975  PSA_KEY_TYPE_IS_DH(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
976  0u)
977 
986 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE 1
987 
988 #if defined(PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_BASIC) && \
989  (PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
990  PSA_EXPORT_KEY_PAIR_MAX_SIZE)
991 #undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
992 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
993  PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
994 #endif
995 #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) && \
996  (PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
997  PSA_EXPORT_KEY_PAIR_MAX_SIZE)
998 #undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
999 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
1000  PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
1001 #endif
1002 #if defined(PSA_WANT_KEY_TYPE_DH_KEY_PAIR_BASIC) && \
1003  (PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS) > \
1004  PSA_EXPORT_KEY_PAIR_MAX_SIZE)
1005 #undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
1006 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
1007  PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS)
1008 #endif
1009 
1019 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE 1
1020 
1021 #if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) && \
1022  (PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
1023  PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
1024 #undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
1025 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
1026  PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
1027 #endif
1028 #if defined(PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY) && \
1029  (PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
1030  PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
1031 #undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
1032 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
1033  PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
1034 #endif
1035 #if defined(PSA_WANT_KEY_TYPE_DH_PUBLIC_KEY) && \
1036  (PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS) > \
1037  PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
1038 #undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
1039 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
1040  PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS)
1041 #endif
1042 
1066 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits) \
1067  ((PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) || \
1068  PSA_KEY_TYPE_IS_DH_KEY_PAIR(key_type)) ? PSA_BITS_TO_BYTES(key_bits) : 0u)
1069 
1077 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE 1
1078 
1079 #if defined(PSA_WANT_ALG_ECDH) && \
1080  (PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS) > PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE)
1081 #undef PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE
1082 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS)
1083 #endif
1084 #if defined(PSA_WANT_ALG_FFDH) && \
1085  (PSA_BITS_TO_BYTES(PSA_VENDOR_FFDH_MAX_KEY_BITS) > PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE)
1086 #undef PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE
1087 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE PSA_BITS_TO_BYTES(PSA_VENDOR_FFDH_MAX_KEY_BITS)
1088 #endif
1089 
1114 #define PSA_CIPHER_IV_LENGTH(key_type, alg) \
1115  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
1116  ((alg) == PSA_ALG_CTR || \
1117  (alg) == PSA_ALG_CFB || \
1118  (alg) == PSA_ALG_OFB || \
1119  (alg) == PSA_ALG_XTS || \
1120  (alg) == PSA_ALG_CBC_NO_PADDING || \
1121  (alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1122  (key_type) == PSA_KEY_TYPE_CHACHA20 && \
1123  (alg) == PSA_ALG_STREAM_CIPHER ? 12u : \
1124  (alg) == PSA_ALG_CCM_STAR_NO_TAG ? 13u : \
1125  0u)
1126 
1131 #define PSA_CIPHER_IV_MAX_SIZE 16u
1132 
1156 #define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1157  (alg == PSA_ALG_CBC_PKCS7 ? \
1158  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1159  PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1160  (input_length) + 1u) + \
1161  PSA_CIPHER_IV_LENGTH((key_type), (alg)) : 0u) : \
1162  (PSA_ALG_IS_CIPHER(alg) ? \
1163  (input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
1164  0u))
1165 
1177 #define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length) \
1178  (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, \
1179  (input_length) + 1u) + \
1180  PSA_CIPHER_IV_MAX_SIZE)
1181 
1201 #define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1202  (PSA_ALG_IS_CIPHER(alg) && \
1203  ((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
1204  (input_length) : \
1205  0u)
1206 
1217 #define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length) \
1218  (input_length)
1219 
1238 #define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
1239  (PSA_ALG_IS_CIPHER(alg) ? \
1240  (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1241  (((alg) == PSA_ALG_CBC_PKCS7 || \
1242  (alg) == PSA_ALG_CBC_NO_PADDING || \
1243  (alg) == PSA_ALG_ECB_NO_PADDING) ? \
1244  PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1245  input_length) : \
1246  (input_length)) : 0u) : \
1247  0u)
1248 
1259 #define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
1260  (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, input_length))
1261 
1279 #define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
1280  (PSA_ALG_IS_CIPHER(alg) ? \
1281  (alg == PSA_ALG_CBC_PKCS7 ? \
1282  PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1283  0u) : \
1284  0u)
1285 
1291 #define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE \
1292  (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
1293 
1294 #endif /* PSA_CRYPTO_SIZES_H */
Build-time PSA configuration info.