PSA_AEAD_VERIFY_OUTPUT_SIZE macro

A sufficient plaintext buffer size for psa_aead_verify(). If the size of the plaintext buffer is at least this large, it is guaranteed that psa_aead_verify() will not fail due to an insufficient plaintext buffer size. The actual size of the output may be smaller in any given call. See also #PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE.

Syntax

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Declaration

from crypto_sizes.h:592

#define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \ (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 && \ PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \ PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \ 0u)

Arguments

Argument

Description

key_type

A symmetric key type that is compatible with algorithm \p alg.

alg

An AEAD algorithm (\c PSA_ALG_XXX value such that #PSA_ALG_IS_AEAD(\p alg) is true).

Return value

A sufficient plaintext buffer size for the specified algorithm. If the key type or AEAD algorithm is not recognized, or the parameters are incompatible, return 0.

References

Code

Location

#define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \

crypto_sizes.h:592

PSA_AEAD_VERIFY_OUTPUT_SIZE macro

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