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crypto/ccm: check ccm_compute_adata_mac return value

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Return value was ignored but function could fail
This commit is contained in:
Gaëtan Harter 2017-11-22 14:31:38 +01:00
parent 0319a56586
commit f0e785a430
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GPG Key ID: 76DF6BCF1B1F883B
1 changed files with 8 additions and 2 deletions
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10
sys/crypto/modes/ccm.c
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@ -167,7 +167,10 @@ int cipher_encrypt_ccm(cipher_t* cipher, uint8_t* auth_data, uint32_t auth_data_
}
/* MAC calulation (T) with additional data and plaintext */
ccm_compute_adata_mac(cipher, auth_data, auth_data_len, mac_iv);
len = ccm_compute_adata_mac(cipher, auth_data, auth_data_len, mac_iv);
if (len < 0) {
return len;
}
len = ccm_compute_cbc_mac(cipher, mac_iv, input, input_len, mac);
if (len < 0) {
return len;
@ -245,7 +248,10 @@ int cipher_decrypt_ccm(cipher_t* cipher, uint8_t* auth_data,
}
/* MAC calulation (T) with additional data and plaintext */
ccm_compute_adata_mac(cipher, auth_data, auth_data_len, mac_iv);
len = ccm_compute_adata_mac(cipher, auth_data, auth_data_len, mac_iv);
if (len < 0) {
return len;
}
len = ccm_compute_cbc_mac(cipher, mac_iv, plain, plain_len, mac);
if (len < 0) {
return len;