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PSA_CIPHER_DECRYPT_OUTPUT_SIZE macro
The maximum size of the output of psa_cipher_decrypt(), in bytes. If the size of the output buffer is at least this large, it is guaranteed that psa_cipher_decrypt() will not fail due to an insufficient buffer size. Depending on the algorithm, the actual size of the output might be smaller. See also #PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(\p input_length).
Syntax
#define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
(PSA_ALG_IS_CIPHER(alg) && \
((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
(input_length) : \
0u)
Return value
A sufficient output size for the specified key type and algorithm. If the key type or cipher algorithm is not recognized, or the parameters are incompatible, return 0.