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jwe: strip padding after rsa-aes

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This commit is contained in:
Andy Green 2019-01-22 06:26:08 +08:00
parent 043700a4b0
commit 8587e164f0
3 changed files with 15 additions and 1 deletions
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2
lib/jose/jwe/enc/aescbc.c
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@ -154,7 +154,7 @@ lws_jwe_encrypt_cbc_hs(struct lws_jwe *jwe, uint8_t *cek,
int
lws_jwe_auth_and_decrypt_cbc_hs(struct lws_jwe *jwe, uint8_t *enc_cek,
uint8_t *aad, int aad_len)
uint8_t *aad, int aad_len)
{
int n, hlen = lws_genhmac_size(jwe->jose.enc_alg->hmac_type);
uint8_t digest[LWS_GENHASH_LARGEST];

7
lib/jose/jwe/jwe-rsa-aescbc.c
View file

@ -178,5 +178,12 @@ lws_jwe_auth_and_decrypt_rsa_aes_cbc_hs(struct lws_jwe *jwe)
return -1;
}
/* strip padding */
n = jwe->jws.map.buf[LJWE_CTXT][jwe->jws.map.len[LJWE_CTXT] - 1];
if (n > 16)
return -1;
jwe->jws.map.len[LJWE_CTXT] -= n;
return jwe->jws.map.len[LJWE_CTXT];
}

7
lib/jose/jwe/jwe-rsa-aesgcm.c
View file

@ -170,5 +170,12 @@ lws_jwe_auth_and_decrypt_rsa_aes_gcm(struct lws_jwe *jwe)
return -1;
}
/* strip padding */
n = jwe->jws.map.buf[LJWE_CTXT][jwe->jws.map.len[LJWE_CTXT] - 1];
if (n > 16)
return -1;
jwe->jws.map.len[LJWE_CTXT] -= n;
return jwe->jws.map.len[LJWE_CTXT];
}