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Move remaining size macros from crypto.h to crypto_sizes.h

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No functional changes, code was only moved from crypto.h to crypto_sizes.h.
This commit is contained in:
Gilles Peskine
2018-12-12 13:42:25 +01:00
parent f3b731e817
commit a7c26db335
2 changed files with 72 additions and 72 deletions
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72
include/psa/crypto_sizes.h
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@ -50,6 +50,42 @@
#include MBEDTLS_CONFIG_FILE
#endif
#define PSA_BITS_TO_BYTES(bits) (((bits) + 7) / 8)
#define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8)
/** The size of the output of psa_hash_finish(), in bytes.
*
* This is also the hash size that psa_hash_verify() expects.
*
* \param alg A hash algorithm (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_HASH(\p alg) is true), or an HMAC algorithm
* (#PSA_ALG_HMAC(\c hash_alg) where \c hash_alg is a
* hash algorithm).
*
* \return The hash size for the specified hash algorithm.
* If the hash algorithm is not recognized, return 0.
* An implementation may return either 0 or the correct size
* for a hash algorithm that it recognizes, but does not support.
*/
#define PSA_HASH_SIZE(alg) \
( \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD2 ? 16 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD4 ? 16 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64 : \
0)
/** \def PSA_HASH_MAX_SIZE
*
* Maximum size of a hash.
@ -84,6 +120,26 @@
*/
#define PSA_MAC_MAX_SIZE PSA_HASH_MAX_SIZE
/** The tag size for an AEAD algorithm, in bytes.
*
* \param alg An AEAD algorithm
* (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_AEAD(\p alg) is true).
*
* \return The tag size for the specified algorithm.
* If the AEAD algorithm does not have an identified
* tag that can be distinguished from the rest of
* the ciphertext, return 0.
* If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/
#define PSA_AEAD_TAG_LENGTH(alg) \
(PSA_ALG_IS_AEAD(alg) ? \
(((alg) & PSA_ALG_AEAD_TAG_LENGTH_MASK) >> PSA_AEAD_TAG_LENGTH_OFFSET) : \
0)
/* The maximum size of an RSA key on this implementation, in bits.
* This is a vendor-specific macro.
*
@ -236,6 +292,22 @@
(plaintext_length) - PSA_AEAD_TAG_LENGTH(alg) : \
0)
#define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
(PSA_ALG_IS_RSA_OAEP(alg) ? \
2 * PSA_HASH_FINAL_SIZE(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \
11 /*PKCS#1v1.5*/)
/**
* \brief ECDSA signature size for a given curve bit size
*
* \param curve_bits Curve size in bits.
* \return Signature size in bytes.
*
* \note This macro returns a compile-time constant if its argument is one.
*/
#define PSA_ECDSA_SIGNATURE_SIZE(curve_bits) \
(PSA_BITS_TO_BYTES(curve_bits) * 2)
/** Safe signature buffer size for psa_asymmetric_sign().
*
* This macro returns a safe buffer size for a signature using a key