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.