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-rw-r--r--libtomcrypt/src/misc/base64/base64_decode.c104
-rw-r--r--libtomcrypt/src/misc/base64/base64_encode.c80
2 files changed, 184 insertions, 0 deletions
diff --git a/libtomcrypt/src/misc/base64/base64_decode.c b/libtomcrypt/src/misc/base64/base64_decode.c
new file mode 100644
index 0000000..551add1
--- /dev/null
+++ b/libtomcrypt/src/misc/base64/base64_decode.c
@@ -0,0 +1,104 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org
+ */
+#include "tomcrypt.h"
+
+/**
+ @file base64_decode.c
+ Compliant base64 code donated by Wayne Scott (wscott@bitmover.com)
+*/
+
+
+#ifdef BASE64
+
+static const unsigned char map[256] = {
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255,
+255, 254, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6,
+ 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
+ 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
+255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
+ 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+ 49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+255, 255, 255, 255 };
+
+/**
+ base64 decode a block of memory
+ @param in The base64 data to decode
+ @param inlen The length of the base64 data
+ @param out [out] The destination of the binary decoded data
+ @param outlen [in/out] The max size and resulting size of the decoded data
+ @return CRYPT_OK if successful
+*/
+int base64_decode(const unsigned char *in, unsigned long inlen,
+ unsigned char *out, unsigned long *outlen)
+{
+ unsigned long t, x, y, z;
+ unsigned char c;
+ int g;
+
+ LTC_ARGCHK(in != NULL);
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+
+ g = 3;
+ for (x = y = z = t = 0; x < inlen; x++) {
+ c = map[in[x]&0xFF];
+ if (c == 255) continue;
+ /* the final = symbols are read and used to trim the remaining bytes */
+ if (c == 254) {
+ c = 0;
+ /* prevent g < 0 which would potentially allow an overflow later */
+ if (--g < 0) {
+ return CRYPT_INVALID_PACKET;
+ }
+ } else if (g != 3) {
+ /* we only allow = to be at the end */
+ return CRYPT_INVALID_PACKET;
+ }
+
+ t = (t<<6)|c;
+
+ if (++y == 4) {
+ if (z + g > *outlen) {
+ return CRYPT_BUFFER_OVERFLOW;
+ }
+ out[z++] = (unsigned char)((t>>16)&255);
+ if (g > 1) out[z++] = (unsigned char)((t>>8)&255);
+ if (g > 2) out[z++] = (unsigned char)(t&255);
+ y = t = 0;
+ }
+ }
+ if (y != 0) {
+ return CRYPT_INVALID_PACKET;
+ }
+ *outlen = z;
+ return CRYPT_OK;
+}
+
+#endif
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/misc/base64/base64_decode.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/misc/base64/base64_encode.c b/libtomcrypt/src/misc/base64/base64_encode.c
new file mode 100644
index 0000000..5978643
--- /dev/null
+++ b/libtomcrypt/src/misc/base64/base64_encode.c
@@ -0,0 +1,80 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org
+ */
+#include "tomcrypt.h"
+
+/**
+ @file base64_encode.c
+ Compliant base64 encoder donated by Wayne Scott (wscott@bitmover.com)
+*/
+
+
+#ifdef BASE64
+
+static const char *codes =
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/**
+ base64 Encode a buffer (NUL terminated)
+ @param in The input buffer to encode
+ @param inlen The length of the input buffer
+ @param out [out] The destination of the base64 encoded data
+ @param outlen [in/out] The max size and resulting size
+ @return CRYPT_OK if successful
+*/
+int base64_encode(const unsigned char *in, unsigned long inlen,
+ unsigned char *out, unsigned long *outlen)
+{
+ unsigned long i, len2, leven;
+ unsigned char *p;
+
+ LTC_ARGCHK(in != NULL);
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+
+ /* valid output size ? */
+ len2 = 4 * ((inlen + 2) / 3);
+ if (*outlen < len2 + 1) {
+ return CRYPT_BUFFER_OVERFLOW;
+ }
+ p = out;
+ leven = 3*(inlen / 3);
+ for (i = 0; i < leven; i += 3) {
+ *p++ = codes[(in[0] >> 2) & 0x3F];
+ *p++ = codes[(((in[0] & 3) << 4) + (in[1] >> 4)) & 0x3F];
+ *p++ = codes[(((in[1] & 0xf) << 2) + (in[2] >> 6)) & 0x3F];
+ *p++ = codes[in[2] & 0x3F];
+ in += 3;
+ }
+ /* Pad it if necessary... */
+ if (i < inlen) {
+ unsigned a = in[0];
+ unsigned b = (i+1 < inlen) ? in[1] : 0;
+
+ *p++ = codes[(a >> 2) & 0x3F];
+ *p++ = codes[(((a & 3) << 4) + (b >> 4)) & 0x3F];
+ *p++ = (i+1 < inlen) ? codes[(((b & 0xf) << 2)) & 0x3F] : '=';
+ *p++ = '=';
+ }
+
+ /* append a NULL byte */
+ *p = '\0';
+
+ /* return ok */
+ *outlen = p - out;
+ return CRYPT_OK;
+}
+
+#endif
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/misc/base64/base64_encode.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
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