Initial import

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/uclient-utils.c b/uclient-utils.c
new file mode 100644
index 0000000..0d09974
--- /dev/null
+++ b/uclient-utils.c
@@ -0,0 +1,77 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "uclient-utils.h"
+
+static const char *b64 =
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+void base64_encode(const void *inbuf, unsigned int len, void *outbuf)
+{
+	unsigned char *out = outbuf;
+	const uint8_t *in = inbuf;
+	unsigned int i;
+	int pad = len % 3;
+
+	for (i = 0; i < len - pad; i += 3) {
+		uint32_t in3 = (in[0] << 16) | (in[1] << 8) | in[2];
+		int k;
+
+		for (k = 3; k >= 0; k--) {
+			out[k] = b64[in3 & 0x3f];
+			in3 >>= 6;
+		}
+		in += 3;
+		out += 4;
+	}
+
+	if (pad) {
+		uint32_t in2 = in[0] << (16 - 6);
+
+		out[3] = '=';
+
+		if (pad > 1) {
+			in2 |= in[1] << (8 - 6);
+			out[2] = b64[in2 & 0x3f];
+		} else {
+			out[2] = '=';
+		}
+
+		in2 >>= 6;
+		out[1] = b64[in2 & 0x3f];
+		in2 >>= 6;
+		out[0] = b64[in2 & 0x3f];
+
+		out += 4;
+	}
+
+	*out = '\0';
+}
+
+int uclient_urldecode(const char *in, char *out, bool decode_plus)
+{
+	static char dec[3];
+	int ret = 0;
+	char c;
+
+	while ((c = *(in++))) {
+		if (c == '%') {
+			if (!isxdigit(in[0]) || !isxdigit(in[1]))
+				return -1;
+
+			dec[0] = in[0];
+			dec[1] = in[1];
+			c = strtol(dec, NULL, 16);
+			in += 2;
+		} else if (decode_plus && c == '+') {
+			c = ' ';
+		}
+
+		*(out++) = c;
+		ret++;
+	}
+
+	*out = 0;
+	return ret;
+}