RSA Decryption Failure (-147) while sending and receiving data from Modem on UART

RE: RSA Decryption Failure (-147) while sending and receiving data from Modem on UART

Usama Shafiq — Mon, 24 Nov 2025 05:37:08 GMT

The issue has been resolved. It was a memory leak in the UART callback which was affecting the buffers that are being used in decryption.

Usama Shafiq — Fri, 21 Nov 2025 16:51:00 GMT

psa_status_t status;

int out_size = 0;

status = psa_asymmetric_decrypt(m_locker_rsa_keypair_handle,

PSA_ALG_RSA_PKCS1V15_CRYPT,

m_rsa_enc_key,

t_ble_rsa_header_size, NULL, 0,

m_aes_key,

AES_KEY_SIZE, &out_size);

if (status != PSA_SUCCESS)

{

sb_print_log(LOG_DEBUG," --->decrypt_message_rsa failed! (Error: %d)", status);

return status;

}

this is giving -147

which is :

/** A hardware failure was detected.

* A hardware failure may be transient or permanent depending on the

* cause. */

#define PSA_ERROR_HARDWARE_FAILURE ((psa_status_t)-147)

Sigurd — Fri, 21 Nov 2025 16:45:38 GMT

And you are getting a RSA Decryption Failure (-147) returned from a function? What function are you using ?

Usama Shafiq — Fri, 21 Nov 2025 14:14:37 GMT

MbedTLS

Sigurd — Fri, 21 Nov 2025 13:38:51 GMT

Hi!

[quote user=""]I am using an encryption library for communication over ble.[/quote]

What encryption library are you using?