summaryrefslogtreecommitdiff
path: root/uuencode.c
diff options
context:
space:
mode:
authorDamien Miller <djm@mindrot.org>2000-04-29 23:57:08 +1000
committerDamien Miller <djm@mindrot.org>2000-04-29 23:57:08 +1000
commiteba71bab9bf01c0d688f829a8971f902732558df (patch)
treea9d5b50568bfc10cc50291fd3604debfaf3e3783 /uuencode.c
parent8117111a3c1360727e3c54aad31aa045e7a7871b (diff)
- Merge big update to OpenSSH-2.0 from OpenBSD CVS
[README.openssh2] - interop w/ F-secure windows client - sync documentation - ssh_host_dsa_key not ssh_dsa_key [auth-rsa.c] - missing fclose [auth.c authfile.c compat.c dsa.c dsa.h hostfile.c key.c key.h radix.c] [readconf.c readconf.h ssh-add.c ssh-keygen.c ssh.c ssh.h sshconnect.c] [sshd.c uuencode.c uuencode.h authfile.h] - add DSA pubkey auth and other SSH2 fixes. use ssh-keygen -[xX] for trading keys with the real and the original SSH, directly from the people who invented the SSH protocol. [auth.c auth.h authfile.c sshconnect.c auth1.c auth2.c sshconnect.h] [sshconnect1.c sshconnect2.c] - split auth/sshconnect in one file per protocol version [sshconnect2.c] - remove debug [uuencode.c] - add trailing = [version.h] - OpenSSH-2.0 [ssh-keygen.1 ssh-keygen.c] - add -R flag: exit code indicates if RSA is alive [sshd.c] - remove unused silent if -Q is specified [ssh.h] - host key becomes /etc/ssh_host_dsa_key [readconf.c servconf.c ] - ssh/sshd default to proto 1 and 2 [uuencode.c] - remove debug [auth2.c ssh-keygen.c sshconnect2.c sshd.c] - xfree DSA blobs [auth2.c serverloop.c session.c] - cleanup logging for sshd/2, respect PasswordAuth no [sshconnect2.c] - less debug, respect .ssh/config [README.openssh2 channels.c channels.h] - clientloop.c session.c ssh.c - support for x11-fwding, client+server
Diffstat (limited to 'uuencode.c')
-rw-r--r--uuencode.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/uuencode.c b/uuencode.c
new file mode 100644
index 00000000..62689005
--- /dev/null
+++ b/uuencode.c
@@ -0,0 +1,120 @@
+/*
+ * 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] = '=';
+ } else if (i == nbytes) {
+ *(outptr++) = '=';
+ }
+ *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);
+}