1 // SPDX-License-Identifier: GPL-2.0
5 int ceph_armor(char *dst, const char *src, const char *end);
6 int ceph_unarmor(char *dst, const char *src, const char *end);
23 		return c - 'A';  in decode_bits()
25 		return c - 'a' + 26;  in decode_bits()
27 		return c - '0' + 52;  in decode_bits()
33 		return 0; /* just non-negative, please */  in decode_bits()
34 	return -EINVAL;  in decode_bits()
37 int ceph_armor(char *dst, const char *src, const char *end)  in ceph_armor()  argument
42 	while (src < end) {  in ceph_armor()
45 		a = *src++;  in ceph_armor()
46 		*dst++ = encode_bits(a >> 2);  in ceph_armor()
47 		if (src < end) {  in ceph_armor()
48 			b = *src++;  in ceph_armor()
50 			if (src < end) {  in ceph_armor()
51 				c = *src++;  in ceph_armor()
52 				*dst++ = encode_bits(((b & 15) << 2) |  in ceph_armor()
56 				*dst++ = encode_bits((b & 15) << 2);  in ceph_armor()
75 int ceph_unarmor(char *dst, const char *src, const char *end)  in ceph_unarmor()  argument
79 	while (src < end) {  in ceph_unarmor()
82 		if (src[0] == '\n') {  in ceph_unarmor()
83 			src++;  in ceph_unarmor()
86 		if (src + 4 > end)  in ceph_unarmor()
87 			return -EINVAL;  in ceph_unarmor()
88 		a = decode_bits(src[0]);  in ceph_unarmor()
89 		b = decode_bits(src[1]);  in ceph_unarmor()
90 		c = decode_bits(src[2]);  in ceph_unarmor()
91 		d = decode_bits(src[3]);  in ceph_unarmor()
93 			return -EINVAL;  in ceph_unarmor()
95 		*dst++ = (a << 2) | (b >> 4);  in ceph_unarmor()
96 		if (src[2] == '=')  in ceph_unarmor()
98 		*dst++ = ((b & 15) << 4) | (c >> 2);  in ceph_unarmor()
99 		if (src[3] == '=')  in ceph_unarmor()
100 			return olen + 2;  in ceph_unarmor()
103 		src += 4;  in ceph_unarmor()