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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
commite6918187568dbd01842d8d1d2c808ce16a894239 (patch)
tree64f88b554b444a49f656b6c656111a145cbbaa28 /src/common/armor.c
parentInitial commit. (diff)
downloadceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz
ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/common/armor.c')
-rw-r--r--src/common/armor.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/src/common/armor.c b/src/common/armor.c
new file mode 100644
index 000000000..3508b82e3
--- /dev/null
+++ b/src/common/armor.c
@@ -0,0 +1,131 @@
+
+#if defined(__linux__)
+#include <linux/errno.h>
+#else
+#include <sys/errno.h>
+#endif
+
+/*
+ * base64 encode/decode.
+ */
+
+const char *pem_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static int encode_bits(int c)
+{
+ return pem_key[c];
+}
+
+static int decode_bits(char c)
+{
+ if (c >= 'A' && c <= 'Z')
+ return c - 'A';
+ if (c >= 'a' && c <= 'z')
+ return c - 'a' + 26;
+ if (c >= '0' && c <= '9')
+ return c - '0' + 52;
+ if (c == '+' || c == '-')
+ return 62;
+ if (c == '/' || c == '_')
+ return 63;
+ if (c == '=')
+ return 0; /* just non-negative, please */
+ return -EINVAL;
+}
+
+static int set_str_val(char **pdst, const char *end, char c)
+{
+ if (*pdst < end) {
+ char *p = *pdst;
+ *p = c;
+ (*pdst)++;
+ } else
+ return -ERANGE;
+
+ return 0;
+}
+
+int ceph_armor_line_break(char *dst, char * const dst_end, const char *src, const char *end, int line_width)
+{
+ int olen = 0;
+ int line = 0;
+
+#define SET_DST(c) do { \
+ int __ret = set_str_val(&dst, dst_end, c); \
+ if (__ret < 0) \
+ return __ret; \
+} while (0);
+
+ while (src < end) {
+ unsigned char a;
+
+ a = *src++;
+ SET_DST(encode_bits(a >> 2));
+ if (src < end) {
+ unsigned char b;
+ b = *src++;
+ SET_DST(encode_bits(((a & 3) << 4) | (b >> 4)));
+ if (src < end) {
+ unsigned char c;
+ c = *src++;
+ SET_DST(encode_bits(((b & 15) << 2) |
+ (c >> 6)));
+ SET_DST(encode_bits(c & 63));
+ } else {
+ SET_DST(encode_bits((b & 15) << 2));
+ SET_DST('=');
+ }
+ } else {
+ SET_DST(encode_bits(((a & 3) << 4)));
+ SET_DST('=');
+ SET_DST('=');
+ }
+ olen += 4;
+ line += 4;
+ if (line_width && line == line_width) {
+ line = 0;
+ SET_DST('\n');
+ olen++;
+ }
+ }
+ return olen;
+}
+
+int ceph_armor(char *dst, char * const dst_end, const char *src, const char *end)
+{
+ return ceph_armor_line_break(dst, dst_end, src, end, 0);
+}
+
+int ceph_unarmor(char *dst, char * const dst_end, const char *src, const char *end)
+{
+ int olen = 0;
+
+ while (src < end) {
+ int a, b, c, d;
+
+ if (src[0] == '\n') {
+ src++;
+ continue;
+ }
+
+ if (src + 4 > end)
+ return -EINVAL;
+ a = decode_bits(src[0]);
+ b = decode_bits(src[1]);
+ c = decode_bits(src[2]);
+ d = decode_bits(src[3]);
+ if (a < 0 || b < 0 || c < 0 || d < 0)
+ return -EINVAL;
+
+ SET_DST((a << 2) | (b >> 4));
+ if (src[2] == '=')
+ return olen + 1;
+ SET_DST(((b & 15) << 4) | (c >> 2));
+ if (src[3] == '=')
+ return olen + 2;
+ SET_DST(((c & 3) << 6) | d);
+ olen += 3;
+ src += 4;
+ }
+ return olen;
+}