pem: auto add newlines to header/footer in mbedtls_pem_write_buffer()
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/library/pem.c b/library/pem.c
index 9500ffc..7c0c447 100644
--- a/library/pem.c
+++ b/library/pem.c
@@ -473,7 +473,10 @@
size_t len = 0, use_len, add_len = 0;
mbedtls_base64_encode(NULL, 0, &use_len, der_data, der_len);
- add_len = strlen(header) + strlen(footer) + (((use_len > 2) ? (use_len - 2) : 0) / 64) + 1;
+ /* Newlines are appended to the end of both header and footer, so we
+ * account for an extra +2. */
+ add_len = strlen(header) + strlen(footer) + 2 + \
+ (((use_len > 2) ? (use_len - 2) : 0) / 64) + 1;
if (use_len + add_len > buf_len) {
*olen = use_len + add_len;
@@ -493,6 +496,7 @@
memcpy(p, header, strlen(header));
p += strlen(header);
+ *p++ = '\n';
c = encode_buf;
while (use_len) {
@@ -506,6 +510,7 @@
memcpy(p, footer, strlen(footer));
p += strlen(footer);
+ *p++ = '\n';
*p++ = '\0';
*olen = p - buf;