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Increase ALPN length in saved session to 2 bytes

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Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
This commit is contained in:
Waleed Elmelegy 2024-03-13 16:25:34 +00:00
parent 5bc5263b2c
commit daa4da781a
1 changed files with 16 additions and 21 deletions
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37
library/ssl_tls.c
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@ -3753,8 +3753,8 @@ static int ssl_tls13_session_save(const mbedtls_ssl_session *session,
#if defined(MBEDTLS_SSL_SRV_C) && \
defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_ALPN)
const uint8_t alpn_len = (session->ticket_alpn == NULL) ?
0 : (uint8_t) strlen(session->ticket_alpn);
const size_t alpn_len = (session->ticket_alpn == NULL) ?
0 : strlen(session->ticket_alpn) + 1;
#endif
size_t needed = 4 /* ticket_age_add */
+ 1 /* ticket_flags */
@ -3781,7 +3781,7 @@ static int ssl_tls13_session_save(const mbedtls_ssl_session *session,
#if defined(MBEDTLS_SSL_SRV_C)
if (session->endpoint == MBEDTLS_SSL_IS_SERVER) {
#if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_ALPN)
needed += 1 /* alpn_len */
needed += 2 /* alpn_len */
+ alpn_len; /* alpn */
#endif
}
@ -3837,7 +3837,9 @@ static int ssl_tls13_session_save(const mbedtls_ssl_session *session,
#endif /* MBEDTLS_HAVE_TIME */
#if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_ALPN)
*p++ = alpn_len;
MBEDTLS_PUT_UINT16_BE(alpn_len, p, 0);
p += 2;
if (alpn_len > 0) {
/* save chosen alpn */
memcpy(p, session->ticket_alpn, alpn_len);
@ -3932,31 +3934,24 @@ static int ssl_tls13_session_load(mbedtls_ssl_session *session,
#endif /* MBEDTLS_HAVE_TIME */
#if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_ALPN)
uint8_t alpn_len;
size_t alpn_len;
if (end - p < 1) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
alpn_len = *p++;
if (end - p < alpn_len) {
if (end - p < 2) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
if (alpn_len > MBEDTLS_SSL_MAX_ALPN_NAME_LEN) {
alpn_len = MBEDTLS_GET_UINT16_BE(p, 0);
p += 2;
if (end - p < (long int) alpn_len) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
if (alpn_len > 0) {
if (session->ticket_alpn != NULL) {
mbedtls_zeroize_and_free(session->ticket_alpn,
strlen(session->ticket_alpn));
int ret = mbedtls_ssl_session_set_ticket_alpn(session, (char *) p);
if (ret != 0) {
return ret;
}
session->ticket_alpn = mbedtls_calloc(alpn_len + 1, sizeof(char));
if (session->ticket_alpn == NULL) {
return MBEDTLS_ERR_SSL_ALLOC_FAILED;
}
memcpy(session->ticket_alpn, p, alpn_len);
p += alpn_len;
}
#endif /* MBEDTLS_SSL_EARLY_DATA && MBEDTLS_SSL_ALPN */
@ -4235,7 +4230,7 @@ static const unsigned char ssl_serialized_session_header[] = {
* uint64 ticket_creation_time;
* #endif
* #if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_ALPN)
* opaque ticket_alpn<0..255>;
* opaque ticket_alpn<0..256>;
* #endif
* };
* } serialized_session_tls13;