Mbed TLS v3.5.2
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crypto_sizes.h
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1
23/*
24 * Copyright The Mbed TLS Contributors
25 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
26 */
27
28#ifndef PSA_CRYPTO_SIZES_H
29#define PSA_CRYPTO_SIZES_H
30
31/*
32 * Include the build-time configuration information file. Here, we do not
33 * include `"mbedtls/build_info.h"` directly but `"psa/build_info.h"`, which
34 * is basically just an alias to it. This is to ease the maintenance of the
35 * PSA cryptography repository which has a different build system and
36 * configuration.
37 */
38#include "psa/build_info.h"
39
40#define PSA_BITS_TO_BYTES(bits) (((bits) + 7u) / 8u)
41#define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8u)
42#define PSA_MAX_OF_THREE(a, b, c) ((a) <= (b) ? (b) <= (c) ? \
43 (c) : (b) : (a) <= (c) ? (c) : (a))
44
45#define PSA_ROUND_UP_TO_MULTIPLE(block_size, length) \
46 (((length) + (block_size) - 1) / (block_size) * (block_size))
47
60#define PSA_HASH_LENGTH(alg) \
61 ( \
62 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16u : \
63 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20u : \
64 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20u : \
65 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28u : \
66 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32u : \
67 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48u : \
68 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64u : \
69 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28u : \
70 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32u : \
71 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28u : \
72 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32u : \
73 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48u : \
74 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64u : \
75 0u)
76
92#define PSA_HASH_BLOCK_LENGTH(alg) \
93 ( \
94 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 64u : \
95 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 64u : \
96 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 64u : \
97 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 64u : \
98 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 64u : \
99 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 128u : \
100 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 128u : \
101 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 128u : \
102 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 128u : \
103 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 144u : \
104 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 136u : \
105 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 104u : \
106 PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 72u : \
107 0u)
108
116/* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-224,
117 * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
118 * HMAC-SHA3-512. */
119/* Note: PSA_HASH_MAX_SIZE should be kept in sync with MBEDTLS_MD_MAX_SIZE,
120 * see the note on MBEDTLS_MD_MAX_SIZE for details. */
121#if defined(PSA_WANT_ALG_SHA3_224)
122#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 144u
123#elif defined(PSA_WANT_ALG_SHA3_256)
124#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 136u
125#elif defined(PSA_WANT_ALG_SHA_512)
126#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128u
127#elif defined(PSA_WANT_ALG_SHA_384)
128#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128u
129#elif defined(PSA_WANT_ALG_SHA3_384)
130#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 104u
131#elif defined(PSA_WANT_ALG_SHA3_512)
132#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 72u
133#elif defined(PSA_WANT_ALG_SHA_256)
134#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
135#elif defined(PSA_WANT_ALG_SHA_224)
136#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
137#else /* SHA-1 or smaller */
138#define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
139#endif
140
141#if defined(PSA_WANT_ALG_SHA_512) || defined(PSA_WANT_ALG_SHA3_512)
142#define PSA_HASH_MAX_SIZE 64u
143#elif defined(PSA_WANT_ALG_SHA_384) || defined(PSA_WANT_ALG_SHA3_384)
144#define PSA_HASH_MAX_SIZE 48u
145#elif defined(PSA_WANT_ALG_SHA_256) || defined(PSA_WANT_ALG_SHA3_256)
146#define PSA_HASH_MAX_SIZE 32u
147#elif defined(PSA_WANT_ALG_SHA_224) || defined(PSA_WANT_ALG_SHA3_224)
148#define PSA_HASH_MAX_SIZE 28u
149#else /* SHA-1 or smaller */
150#define PSA_HASH_MAX_SIZE 20u
151#endif
152
160/* All non-HMAC MACs have a maximum size that's smaller than the
161 * minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */
162/* Note that the encoding of truncated MAC algorithms limits this value
163 * to 64 bytes.
164 */
165#define PSA_MAC_MAX_SIZE PSA_HASH_MAX_SIZE
166
188#define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg) \
189 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
190 PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
191 ((void) (key_bits), 0u))
192
197#define PSA_AEAD_TAG_MAX_SIZE 16u
198
199/* The maximum size of an RSA key on this implementation, in bits.
200 * This is a vendor-specific macro.
201 *
202 * Mbed TLS does not set a hard limit on the size of RSA keys: any key
203 * whose parameters fit in a bignum is accepted. However large keys can
204 * induce a large memory usage and long computation times. Unlike other
205 * auxiliary macros in this file and in crypto.h, which reflect how the
206 * library is configured, this macro defines how the library is
207 * configured. This implementation refuses to import or generate an
208 * RSA key whose size is larger than the value defined here.
209 *
210 * Note that an implementation may set different size limits for different
211 * operations, and does not need to accept all key sizes up to the limit. */
212#define PSA_VENDOR_RSA_MAX_KEY_BITS 4096u
213
214/* The minimum size of an RSA key on this implementation, in bits.
215 * This is a vendor-specific macro.
216 *
217 * Limits RSA key generation to a minimum due to avoid accidental misuse.
218 * This value cannot be less than 128 bits.
219 */
220#if defined(MBEDTLS_RSA_GEN_KEY_MIN_BITS)
221#define PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS MBEDTLS_RSA_GEN_KEY_MIN_BITS
222#else
223#define PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS 1024
224#endif
225
226/* The maximum size of an DH key on this implementation, in bits.
227 *
228 * Note that an implementation may set different size limits for different
229 * operations, and does not need to accept all key sizes up to the limit. */
230#define PSA_VENDOR_FFDH_MAX_KEY_BITS 8192u
231
232/* The maximum size of an ECC key on this implementation, in bits.
233 * This is a vendor-specific macro. */
234#if defined(PSA_WANT_ECC_SECP_R1_521)
235#define PSA_VENDOR_ECC_MAX_CURVE_BITS 521u
236#elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_512)
237#define PSA_VENDOR_ECC_MAX_CURVE_BITS 512u
238#elif defined(PSA_WANT_ECC_MONTGOMERY_448)
239#define PSA_VENDOR_ECC_MAX_CURVE_BITS 448u
240#elif defined(PSA_WANT_ECC_SECP_R1_384)
241#define PSA_VENDOR_ECC_MAX_CURVE_BITS 384u
242#elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_384)
243#define PSA_VENDOR_ECC_MAX_CURVE_BITS 384u
244#elif defined(PSA_WANT_ECC_SECP_R1_256)
245#define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
246#elif defined(PSA_WANT_ECC_SECP_K1_256)
247#define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
248#elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_256)
249#define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
250#elif defined(PSA_WANT_ECC_MONTGOMERY_255)
251#define PSA_VENDOR_ECC_MAX_CURVE_BITS 255u
252#elif defined(PSA_WANT_ECC_SECP_R1_224)
253#define PSA_VENDOR_ECC_MAX_CURVE_BITS 224u
254#elif defined(PSA_WANT_ECC_SECP_K1_224)
255#define PSA_VENDOR_ECC_MAX_CURVE_BITS 224u
256#elif defined(PSA_WANT_ECC_SECP_R1_192)
257#define PSA_VENDOR_ECC_MAX_CURVE_BITS 192u
258#elif defined(PSA_WANT_ECC_SECP_K1_192)
259#define PSA_VENDOR_ECC_MAX_CURVE_BITS 192u
260#else
261#define PSA_VENDOR_ECC_MAX_CURVE_BITS 0u
262#endif
263
279#define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128u
280
281/* The expected size of input passed to psa_tls12_ecjpake_to_pms_input,
282 * which is expected to work with P-256 curve only. */
283#define PSA_TLS12_ECJPAKE_TO_PMS_INPUT_SIZE 65u
284
285/* The size of a serialized K.X coordinate to be used in
286 * psa_tls12_ecjpake_to_pms_input. This function only accepts the P-256
287 * curve. */
288#define PSA_TLS12_ECJPAKE_TO_PMS_DATA_SIZE 32u
289
290/* The maximum number of iterations for PBKDF2 on this implementation, in bits.
291 * This is a vendor-specific macro. This can be configured if necessary */
292#define PSA_VENDOR_PBKDF2_MAX_ITERATIONS 0xffffffffU
293
295#define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16u
296
318#define PSA_MAC_LENGTH(key_type, key_bits, alg) \
319 ((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) : \
320 PSA_ALG_IS_HMAC(alg) ? PSA_HASH_LENGTH(PSA_ALG_HMAC_GET_HASH(alg)) : \
321 PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
322 ((void) (key_type), (void) (key_bits), 0u))
323
350#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
351 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
352 (plaintext_length) + PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
353 0u)
354
373#define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length) \
374 ((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)
375
376
403#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
404 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
405 (ciphertext_length) > PSA_ALG_AEAD_GET_TAG_LENGTH(alg) ? \
406 (ciphertext_length) - PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
407 0u)
408
427#define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length) \
428 (ciphertext_length)
429
455#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
456 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 ? \
457 MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CCM) ? 13u : \
458 MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_GCM) ? 12u : \
459 0u : \
460 (key_type) == PSA_KEY_TYPE_CHACHA20 && \
461 MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CHACHA20_POLY1305) ? 12u : \
462 0u)
463
475#define PSA_AEAD_NONCE_MAX_SIZE 13u
476
503/* For all the AEAD modes defined in this specification, it is possible
504 * to emit output without delay. However, hardware may not always be
505 * capable of this. So for modes based on a block cipher, allow the
506 * implementation to delay the output until it has a full block. */
507#define PSA_AEAD_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
508 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ? \
509 PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
510 PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), (input_length)) : \
511 (input_length) : \
512 0u)
513
524#define PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(input_length) \
525 (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)))
526
548#define PSA_AEAD_FINISH_OUTPUT_SIZE(key_type, alg) \
549 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
550 PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
551 PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
552 0u)
553
559#define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
560
582#define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \
583 (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \
584 PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
585 PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
586 0u)
587
593#define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
594
595#define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
596 (PSA_ALG_IS_RSA_OAEP(alg) ? \
597 2u * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1u : \
598 11u /*PKCS#1v1.5*/)
599
608#define PSA_ECDSA_SIGNATURE_SIZE(curve_bits) \
609 (PSA_BITS_TO_BYTES(curve_bits) * 2u)
610
636#define PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg) \
637 (PSA_KEY_TYPE_IS_RSA(key_type) ? ((void) alg, PSA_BITS_TO_BYTES(key_bits)) : \
638 PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_ECDSA_SIGNATURE_SIZE(key_bits) : \
639 ((void) alg, 0u))
640
641#define PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE \
642 PSA_ECDSA_SIGNATURE_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
643
651#define PSA_SIGNATURE_MAX_SIZE 1
652
653#if (defined(PSA_WANT_ALG_ECDSA) || defined(PSA_WANT_ALG_DETERMINISTIC_ECDSA)) && \
654 (PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE > PSA_SIGNATURE_MAX_SIZE)
655#undef PSA_SIGNATURE_MAX_SIZE
656#define PSA_SIGNATURE_MAX_SIZE PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE
657#endif
658#if (defined(PSA_WANT_ALG_RSA_PKCS1V15_SIGN) || defined(PSA_WANT_ALG_RSA_PSS)) && \
659 (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_SIGNATURE_MAX_SIZE)
660#undef PSA_SIGNATURE_MAX_SIZE
661#define PSA_SIGNATURE_MAX_SIZE PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS)
662#endif
663
689#define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
690 (PSA_KEY_TYPE_IS_RSA(key_type) ? \
691 ((void) alg, PSA_BITS_TO_BYTES(key_bits)) : \
692 0u)
693
699/* This macro assumes that RSA is the only supported asymmetric encryption. */
700#define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE \
701 (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
702
728#define PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg) \
729 (PSA_KEY_TYPE_IS_RSA(key_type) ? \
730 PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) : \
731 0u)
732
740#define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE \
741 (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
742
743/* Maximum size of the ASN.1 encoding of an INTEGER with the specified
744 * number of bits.
745 *
746 * This definition assumes that bits <= 2^19 - 9 so that the length field
747 * is at most 3 bytes. The length of the encoding is the length of the
748 * bit string padded to a whole number of bytes plus:
749 * - 1 type byte;
750 * - 1 to 3 length bytes;
751 * - 0 to 1 bytes of leading 0 due to the sign bit.
752 */
753#define PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(bits) \
754 ((bits) / 8u + 5u)
755
756/* Maximum size of the export encoding of an RSA public key.
757 * Assumes that the public exponent is less than 2^32.
758 *
759 * RSAPublicKey ::= SEQUENCE {
760 * modulus INTEGER, -- n
761 * publicExponent INTEGER } -- e
762 *
763 * - 4 bytes of SEQUENCE overhead;
764 * - n : INTEGER;
765 * - 7 bytes for the public exponent.
766 */
767#define PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
768 (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) + 11u)
769
770/* Maximum size of the export encoding of an RSA key pair.
771 * Assumes that the public exponent is less than 2^32 and that the size
772 * difference between the two primes is at most 1 bit.
773 *
774 * RSAPrivateKey ::= SEQUENCE {
775 * version Version, -- 0
776 * modulus INTEGER, -- N-bit
777 * publicExponent INTEGER, -- 32-bit
778 * privateExponent INTEGER, -- N-bit
779 * prime1 INTEGER, -- N/2-bit
780 * prime2 INTEGER, -- N/2-bit
781 * exponent1 INTEGER, -- N/2-bit
782 * exponent2 INTEGER, -- N/2-bit
783 * coefficient INTEGER, -- N/2-bit
784 * }
785 *
786 * - 4 bytes of SEQUENCE overhead;
787 * - 3 bytes of version;
788 * - 7 half-size INTEGERs plus 2 full-size INTEGERs,
789 * overapproximated as 9 half-size INTEGERS;
790 * - 7 bytes for the public exponent.
791 */
792#define PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) \
793 (9u * PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE((key_bits) / 2u + 1u) + 14u)
794
795/* Maximum size of the export encoding of a DSA public key.
796 *
797 * SubjectPublicKeyInfo ::= SEQUENCE {
798 * algorithm AlgorithmIdentifier,
799 * subjectPublicKey BIT STRING } -- contains DSAPublicKey
800 * AlgorithmIdentifier ::= SEQUENCE {
801 * algorithm OBJECT IDENTIFIER,
802 * parameters Dss-Params } -- SEQUENCE of 3 INTEGERs
803 * DSAPublicKey ::= INTEGER -- public key, Y
804 *
805 * - 3 * 4 bytes of SEQUENCE overhead;
806 * - 1 + 1 + 7 bytes of algorithm (DSA OID);
807 * - 4 bytes of BIT STRING overhead;
808 * - 3 full-size INTEGERs (p, g, y);
809 * - 1 + 1 + 32 bytes for 1 sub-size INTEGER (q <= 256 bits).
810 */
811#define PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) \
812 (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3u + 59u)
813
814/* Maximum size of the export encoding of a DSA key pair.
815 *
816 * DSAPrivateKey ::= SEQUENCE {
817 * version Version, -- 0
818 * prime INTEGER, -- p
819 * subprime INTEGER, -- q
820 * generator INTEGER, -- g
821 * public INTEGER, -- y
822 * private INTEGER, -- x
823 * }
824 *
825 * - 4 bytes of SEQUENCE overhead;
826 * - 3 bytes of version;
827 * - 3 full-size INTEGERs (p, g, y);
828 * - 2 * (1 + 1 + 32) bytes for 2 sub-size INTEGERs (q, x <= 256 bits).
829 */
830#define PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) \
831 (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3u + 75u)
832
833/* Maximum size of the export encoding of an ECC public key.
834 *
835 * The representation of an ECC public key is:
836 * - The byte 0x04;
837 * - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
838 * - `y_P` as a `ceiling(m/8)`-byte string, big-endian;
839 * - where m is the bit size associated with the curve.
840 *
841 * - 1 byte + 2 * point size.
842 */
843#define PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) \
844 (2u * PSA_BITS_TO_BYTES(key_bits) + 1u)
845
846/* Maximum size of the export encoding of an ECC key pair.
847 *
848 * An ECC key pair is represented by the secret value.
849 */
850#define PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) \
851 (PSA_BITS_TO_BYTES(key_bits))
852
853/* Maximum size of the export encoding of an DH key pair.
854 *
855 * An DH key pair is represented by the secret value.
856 */
857#define PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(key_bits) \
858 (PSA_BITS_TO_BYTES(key_bits))
859
860/* Maximum size of the export encoding of an DH public key.
861 */
862#define PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(key_bits) \
863 (PSA_BITS_TO_BYTES(key_bits))
864
904#define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \
905 (PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
906 PSA_KEY_TYPE_IS_DH(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
907 (key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) : \
908 (key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
909 (key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) : \
910 (key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
911 PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) : \
912 PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
913 0u)
914
960#define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
961 (PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
962 PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
963 PSA_KEY_TYPE_IS_DH(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
964 0u)
965
974#define PSA_EXPORT_KEY_PAIR_MAX_SIZE 1
975
976#if defined(PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_BASIC) && \
977 (PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
978 PSA_EXPORT_KEY_PAIR_MAX_SIZE)
979#undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
980#define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
981 PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
982#endif
983#if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) && \
984 (PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
985 PSA_EXPORT_KEY_PAIR_MAX_SIZE)
986#undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
987#define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
988 PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
989#endif
990#if defined(PSA_WANT_KEY_TYPE_DH_KEY_PAIR_BASIC) && \
991 (PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS) > \
992 PSA_EXPORT_KEY_PAIR_MAX_SIZE)
993#undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
994#define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
995 PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS)
996#endif
997
1007#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE 1
1008
1009#if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) && \
1010 (PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
1011 PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
1012#undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
1013#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
1014 PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
1015#endif
1016#if defined(PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY) && \
1017 (PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
1018 PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
1019#undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
1020#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
1021 PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
1022#endif
1023#if defined(PSA_WANT_KEY_TYPE_DH_PUBLIC_KEY) && \
1024 (PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS) > \
1025 PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
1026#undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
1027#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
1028 PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS)
1029#endif
1030
1054#define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits) \
1055 ((PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) || \
1056 PSA_KEY_TYPE_IS_DH_KEY_PAIR(key_type)) ? PSA_BITS_TO_BYTES(key_bits) : 0u)
1057
1065#define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE 1
1066
1067#if defined(PSA_WANT_ALG_ECDH) && \
1068 (PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS) > PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE)
1069#undef PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE
1070#define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS)
1071#endif
1072#if defined(PSA_WANT_ALG_FFDH) && \
1073 (PSA_BITS_TO_BYTES(PSA_VENDOR_FFDH_MAX_KEY_BITS) > PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE)
1074#undef PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE
1075#define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE PSA_BITS_TO_BYTES(PSA_VENDOR_FFDH_MAX_KEY_BITS)
1076#endif
1077
1102#define PSA_CIPHER_IV_LENGTH(key_type, alg) \
1103 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
1104 ((alg) == PSA_ALG_CTR || \
1105 (alg) == PSA_ALG_CFB || \
1106 (alg) == PSA_ALG_OFB || \
1107 (alg) == PSA_ALG_XTS || \
1108 (alg) == PSA_ALG_CBC_NO_PADDING || \
1109 (alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1110 (key_type) == PSA_KEY_TYPE_CHACHA20 && \
1111 (alg) == PSA_ALG_STREAM_CIPHER ? 12u : \
1112 (alg) == PSA_ALG_CCM_STAR_NO_TAG ? 13u : \
1113 0u)
1114
1119#define PSA_CIPHER_IV_MAX_SIZE 16u
1120
1144#define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1145 (alg == PSA_ALG_CBC_PKCS7 ? \
1146 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1147 PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1148 (input_length) + 1u) + \
1149 PSA_CIPHER_IV_LENGTH((key_type), (alg)) : 0u) : \
1150 (PSA_ALG_IS_CIPHER(alg) ? \
1151 (input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
1152 0u))
1153
1165#define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length) \
1166 (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, \
1167 (input_length) + 1u) + \
1168 PSA_CIPHER_IV_MAX_SIZE)
1169
1189#define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
1190 (PSA_ALG_IS_CIPHER(alg) && \
1191 ((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
1192 (input_length) : \
1193 0u)
1194
1205#define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length) \
1206 (input_length)
1207
1226#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
1227 (PSA_ALG_IS_CIPHER(alg) ? \
1228 (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
1229 (((alg) == PSA_ALG_CBC_PKCS7 || \
1230 (alg) == PSA_ALG_CBC_NO_PADDING || \
1231 (alg) == PSA_ALG_ECB_NO_PADDING) ? \
1232 PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
1233 input_length) : \
1234 (input_length)) : 0u) : \
1235 0u)
1236
1247#define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
1248 (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, input_length))
1249
1267#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
1268 (PSA_ALG_IS_CIPHER(alg) ? \
1269 (alg == PSA_ALG_CBC_PKCS7 ? \
1270 PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
1271 0u) : \
1272 0u)
1273
1279#define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE \
1280 (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
1281
1282#endif /* PSA_CRYPTO_SIZES_H */
Build-time PSA configuration info.