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-rw-r--r--src/lib/misc/pem/info.txt6
-rw-r--r--src/lib/misc/pem/pem.cpp147
-rw-r--r--src/lib/misc/pem/pem.h90
3 files changed, 243 insertions, 0 deletions
diff --git a/src/lib/misc/pem/info.txt b/src/lib/misc/pem/info.txt
new file mode 100644
index 000000000..008240adc
--- /dev/null
+++ b/src/lib/misc/pem/info.txt
@@ -0,0 +1,6 @@
+define PEM_CODEC 20131128
+
+<requires>
+base64
+filters
+</requires>
diff --git a/src/lib/misc/pem/pem.cpp b/src/lib/misc/pem/pem.cpp
new file mode 100644
index 000000000..9b57c1531
--- /dev/null
+++ b/src/lib/misc/pem/pem.cpp
@@ -0,0 +1,147 @@
+/*
+* PEM Encoding/Decoding
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/pem.h>
+#include <botan/filters.h>
+#include <botan/parsing.h>
+
+namespace Botan {
+
+namespace PEM_Code {
+
+/*
+* PEM encode BER/DER-encoded objects
+*/
+std::string encode(const byte der[], size_t length, const std::string& label,
+ size_t width)
+ {
+ const std::string PEM_HEADER = "-----BEGIN " + label + "-----\n";
+ const std::string PEM_TRAILER = "-----END " + label + "-----\n";
+
+ Pipe pipe(new Base64_Encoder(true, width));
+ pipe.process_msg(der, length);
+ return (PEM_HEADER + pipe.read_all_as_string() + PEM_TRAILER);
+ }
+
+/*
+* Decode PEM down to raw BER/DER
+*/
+secure_vector<byte> decode_check_label(DataSource& source,
+ const std::string& label_want)
+ {
+ std::string label_got;
+ secure_vector<byte> ber = decode(source, label_got);
+ if(label_got != label_want)
+ throw Decoding_Error("PEM: Label mismatch, wanted " + label_want +
+ ", got " + label_got);
+ return ber;
+ }
+
+/*
+* Decode PEM down to raw BER/DER
+*/
+secure_vector<byte> decode(DataSource& source, std::string& label)
+ {
+ const size_t RANDOM_CHAR_LIMIT = 8;
+
+ const std::string PEM_HEADER1 = "-----BEGIN ";
+ const std::string PEM_HEADER2 = "-----";
+ size_t position = 0;
+
+ while(position != PEM_HEADER1.length())
+ {
+ byte b;
+ if(!source.read_byte(b))
+ throw Decoding_Error("PEM: No PEM header found");
+ if(b == PEM_HEADER1[position])
+ ++position;
+ else if(position >= RANDOM_CHAR_LIMIT)
+ throw Decoding_Error("PEM: Malformed PEM header");
+ else
+ position = 0;
+ }
+ position = 0;
+ while(position != PEM_HEADER2.length())
+ {
+ byte b;
+ if(!source.read_byte(b))
+ throw Decoding_Error("PEM: No PEM header found");
+ if(b == PEM_HEADER2[position])
+ ++position;
+ else if(position)
+ throw Decoding_Error("PEM: Malformed PEM header");
+
+ if(position == 0)
+ label += static_cast<char>(b);
+ }
+
+ Pipe base64(new Base64_Decoder);
+ base64.start_msg();
+
+ const std::string PEM_TRAILER = "-----END " + label + "-----";
+ position = 0;
+ while(position != PEM_TRAILER.length())
+ {
+ byte b;
+ if(!source.read_byte(b))
+ throw Decoding_Error("PEM: No PEM trailer found");
+ if(b == PEM_TRAILER[position])
+ ++position;
+ else if(position)
+ throw Decoding_Error("PEM: Malformed PEM trailer");
+
+ if(position == 0)
+ base64.write(b);
+ }
+ base64.end_msg();
+ return base64.read_all();
+ }
+
+secure_vector<byte> decode_check_label(const std::string& pem,
+ const std::string& label_want)
+ {
+ DataSource_Memory src(pem);
+ return decode_check_label(src, label_want);
+ }
+
+secure_vector<byte> decode(const std::string& pem, std::string& label)
+ {
+ DataSource_Memory src(pem);
+ return decode(src, label);
+ }
+
+/*
+* Search for a PEM signature
+*/
+bool matches(DataSource& source, const std::string& extra,
+ size_t search_range)
+ {
+ const std::string PEM_HEADER = "-----BEGIN " + extra;
+
+ secure_vector<byte> search_buf(search_range);
+ size_t got = source.peek(&search_buf[0], search_buf.size(), 0);
+
+ if(got < PEM_HEADER.length())
+ return false;
+
+ size_t index = 0;
+
+ for(size_t j = 0; j != got; ++j)
+ {
+ if(search_buf[j] == PEM_HEADER[index])
+ ++index;
+ else
+ index = 0;
+ if(index == PEM_HEADER.size())
+ return true;
+ }
+ return false;
+ }
+
+}
+
+}
diff --git a/src/lib/misc/pem/pem.h b/src/lib/misc/pem/pem.h
new file mode 100644
index 000000000..3b3fec32e
--- /dev/null
+++ b/src/lib/misc/pem/pem.h
@@ -0,0 +1,90 @@
+/*
+* PEM Encoding/Decoding
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_PEM_H__
+#define BOTAN_PEM_H__
+
+#include <botan/data_src.h>
+
+namespace Botan {
+
+namespace PEM_Code {
+
+/**
+* Encode some binary data in PEM format
+*/
+BOTAN_DLL std::string encode(const byte data[],
+ size_t data_len,
+ const std::string& label,
+ size_t line_width = 64);
+
+/**
+* Encode some binary data in PEM format
+*/
+inline std::string encode(const std::vector<byte>& data,
+ const std::string& label,
+ size_t line_width = 64)
+ {
+ return encode(&data[0], data.size(), label, line_width);
+ }
+
+/**
+* Encode some binary data in PEM format
+*/
+inline std::string encode(const secure_vector<byte>& data,
+ const std::string& label,
+ size_t line_width = 64)
+ {
+ return encode(&data[0], data.size(), label, line_width);
+ }
+
+/**
+* Decode PEM data
+* @param pem a datasource containing PEM encoded data
+* @param label is set to the PEM label found for later inspection
+*/
+BOTAN_DLL secure_vector<byte> decode(DataSource& pem,
+ std::string& label);
+
+/**
+* Decode PEM data
+* @param pem a string containing PEM encoded data
+* @param label is set to the PEM label found for later inspection
+*/
+BOTAN_DLL secure_vector<byte> decode(const std::string& pem,
+ std::string& label);
+
+/**
+* Decode PEM data
+* @param pem a datasource containing PEM encoded data
+* @param label is what we expect the label to be
+*/
+BOTAN_DLL secure_vector<byte> decode_check_label(
+ DataSource& pem,
+ const std::string& label);
+
+/**
+* Decode PEM data
+* @param pem a string containing PEM encoded data
+* @param label is what we expect the label to be
+*/
+BOTAN_DLL secure_vector<byte> decode_check_label(
+ const std::string& pem,
+ const std::string& label);
+
+/**
+* Heuristic test for PEM data.
+*/
+BOTAN_DLL bool matches(DataSource& source,
+ const std::string& extra = "",
+ size_t search_range = 4096);
+
+}
+
+}
+
+#endif
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