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PSA_CIPHER_UPDATE_OUTPUT_SIZE macro
A sufficient output buffer size for psa_cipher_update(). If the size of the output buffer is at least this large, it is guaranteed that psa_cipher_update() will not fail due to an insufficient buffer size. The actual size of the output might be smaller in any given call. See also #PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(\p input_length).
Syntax
#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
(PSA_ALG_IS_CIPHER(alg) ? \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ? \
(((alg) == PSA_ALG_CBC_PKCS7 || \
(alg) == PSA_ALG_CBC_NO_PADDING || \
(alg) == PSA_ALG_ECB_NO_PADDING) ? \
PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
input_length) : \
(input_length)) : 0u) : \
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.
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