64     size_t i, n;  in mbedtls_base64_encode()  local
73     n = slen / 3 + (slen % 3 != 0);  in mbedtls_base64_encode()
75     if (n > (SIZE_MAX - 1) / 4) {  in mbedtls_base64_encode()
80     n *= 4;  in mbedtls_base64_encode()
82     if ((dlen < n + 1) || (NULL == dst)) {  in mbedtls_base64_encode()
83         *olen = n + 1;  in mbedtls_base64_encode()
87     n = (slen / 3) * 3;  in mbedtls_base64_encode()
89     for (i = 0, p = dst; i < n; i += 3) {  in mbedtls_base64_encode()
132     size_t n; /* number of digits or trailing = in source */  in mbedtls_base64_decode()  local
140     for (i = n = 0; i < slen; i++) {  in mbedtls_base64_decode()
183         n++;  in mbedtls_base64_decode()
186     if (n == 0) {  in mbedtls_base64_decode()
195     n = (6 * (n >> 3)) + ((6 * (n & 0x7) + 7) >> 3);  in mbedtls_base64_decode()
196     n -= equals;  in mbedtls_base64_decode()
198     if (dst == NULL || dlen < n) {  in mbedtls_base64_decode()
199         *olen = n;  in mbedtls_base64_decode()