1 files changed, 117 insertions, 0 deletions
diff --git a/usr.bin/ssh/uuencode.c b/usr.bin/ssh/uuencode.c
new file mode 100644
index 00000000000..22cad305884
--- /dev/null
+++ b/usr.bin/ssh/uuencode.c
@@ -0,0 +1,117 @@
+/*
+ *   base-64 encoding pinched from lynx2-7-2, who pinched it from rpem.
+ *   Originally written by Mark Riordan 12 August 1990 and 17 Feb 1991
+ *   and placed in the public domain.
+ *
+ *   Dug Song <dugsong@UMICH.EDU>
+ */
+
+#include "includes.h"
+#include "xmalloc.h"
+
+char six2pr[64] = {
+	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
+	'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+	'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
+	'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+	'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
+};
+
+unsigned char pr2six[256];
+
+int
+uuencode(unsigned char *bufin, unsigned int nbytes, char *bufcoded)
+{
+	/* ENC is the basic 1 character encoding function to make a char printing */
+#define ENC(c) six2pr[c]
+
+	register char *outptr = bufcoded;
+	unsigned int i;
+
+	for (i = 0; i < nbytes; i += 3) {
+		*(outptr++) = ENC(*bufin >> 2);						/* c1 */
+		*(outptr++) = ENC(((*bufin << 4) & 060)   | ((bufin[1] >> 4) & 017));	/* c2 */
+		*(outptr++) = ENC(((bufin[1] << 2) & 074) | ((bufin[2] >> 6) & 03));	/* c3 */
+		*(outptr++) = ENC(bufin[2] & 077);					/* c4 */
+		bufin += 3;
+	}
+	if (i == nbytes + 1) {
+		outptr[-1] = '=';
+	} else if (i == nbytes + 2) {
+		outptr[-1] = '=';
+		outptr[-2] = '=';
+	}
+	*outptr = '\0';
+	return (outptr - bufcoded);
+}
+
+int
+uudecode(const char *bufcoded, unsigned char *bufplain, int outbufsize)
+{
+	/* single character decode */
+#define DEC(c) pr2six[(unsigned char)c]
+#define MAXVAL 63
+
+	static int first = 1;
+	int nbytesdecoded, j;
+	const char *bufin = bufcoded;
+	register unsigned char *bufout = bufplain;
+	register int nprbytes;
+
+	/* If this is the first call, initialize the mapping table. */
+	if (first) {
+		first = 0;
+		for (j = 0; j < 256; j++)
+			pr2six[j] = MAXVAL + 1;
+		for (j = 0; j < 64; j++)
+			pr2six[(unsigned char) six2pr[j]] = (unsigned char) j;
+	}
+	/* Strip leading whitespace. */
+	while (*bufcoded == ' ' || *bufcoded == '\t')
+		bufcoded++;
+
+	/*
+	 * Figure out how many characters are in the input buffer. If this
+	 * would decode into more bytes than would fit into the output
+	 * buffer, adjust the number of input bytes downwards.
+	 */
+	bufin = bufcoded;
+	while (DEC(*(bufin++)) <= MAXVAL);
+	nprbytes = bufin - bufcoded - 1;
+	nbytesdecoded = ((nprbytes + 3) / 4) * 3;
+	if (nbytesdecoded > outbufsize)
+		nprbytes = (outbufsize * 4) / 3;
+
+	bufin = bufcoded;
+
+	while (nprbytes > 0) {
+		*(bufout++) = (unsigned char) (DEC(*bufin)   << 2 | DEC(bufin[1]) >> 4);
+		*(bufout++) = (unsigned char) (DEC(bufin[1]) << 4 | DEC(bufin[2]) >> 2);
+		*(bufout++) = (unsigned char) (DEC(bufin[2]) << 6 | DEC(bufin[3]));
+		bufin += 4;
+		nprbytes -= 4;
+	}
+	if (nprbytes & 03) {
+		if (DEC(bufin[-2]) > MAXVAL)
+			nbytesdecoded -= 2;
+		else
+			nbytesdecoded -= 1;
+	}
+	return (nbytesdecoded);
+}
+
+void
+dump_base64(FILE *fp, unsigned char *data, int len)
+{
+	unsigned char *buf = xmalloc(2*len);
+	int i, n;
+	n = uuencode(data, len, buf);
+	for (i = 0; i < n; i++) {
+		fprintf(fp, "%c", buf[i]);
+		if (i % 70 == 69)
+			fprintf(fp, "\n");
+	}
+	if (i % 70 != 69)
+		fprintf(fp, "\n");
+	xfree(buf);
+}