publicise functions needed by pemfile compatibility layer

src/pem.rs

@@ -174,7 +174,7 @@ impl PemObject for (SectionKind, Vec<u8>) {
 /// - Otherwise each decoded section is returned with a `Ok(Some((..., remainder)))` where
 ///   `remainder` is the part of the `input` that follows the returned section
 #[allow(clippy::type_complexity)]
-fn from_slice(mut input: &[u8]) -> Result<Option<((SectionKind, Vec<u8>), &[u8])>, Error> {
+pub fn from_slice(mut input: &[u8]) -> Result<Option<((SectionKind, Vec<u8>), &[u8])>, Error> {
     let mut b64buf = Vec::with_capacity(1024);
     let mut section = None::<(Vec<_>, Vec<_>)>;
 
@@ -203,7 +203,7 @@ fn from_slice(mut input: &[u8]) -> Result<Option<((SectionKind, Vec<u8>), &[u8])
 /// - Underlying IO errors produce a `Err(...)`
 /// - Otherwise each decoded section is returned with a `Ok(Some(...))`
 #[cfg(feature = "std")]
-fn from_buf(rd: &mut dyn io::BufRead) -> Result<Option<(SectionKind, Vec<u8>)>, Error> {
+pub fn from_buf(rd: &mut dyn io::BufRead) -> Result<Option<(SectionKind, Vec<u8>)>, Error> {
     let mut b64buf = Vec::with_capacity(1024);
     let mut section = None::<(Vec<_>, Vec<_>)>;
     let mut line = Vec::with_capacity(80);