diff options
Diffstat (limited to 'wgtpkg-base64.c')
| -rw-r--r-- | wgtpkg-base64.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/wgtpkg-base64.c b/wgtpkg-base64.c deleted file mode 100644 index 5cf6f8a..0000000 --- a/wgtpkg-base64.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - Copyright 2015 IoT.bzh - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. -*/ - - -#include <stdlib.h> -#include <string.h> -#include <syslog.h> - -#include "wgtpkg.h" - -static char tob64(char x) -{ - if (x < 26) - return 'A' + x; - if (x < 52) - return 'a' + x - 26; - if (x < 62) - return '0' + x - 52; - return x == 62 ? '+' : '/'; -} - -char *base64encw(const char *buffer, int length, int width) -{ - int remain, in, out; - char *result; - - if (width == 0 || width % 4) { - syslog(LOG_ERR, "bad width in base64enc"); - return NULL; - } - result = malloc(2 + 4 * ((length + 2) / 3) + (length / width)); - if (result == NULL) { - syslog(LOG_ERR, "malloc failed in base64enc"); - return NULL; - } - in = out = 0; - remain = length; - while (remain >= 3) { - if (out % (width + 1) == width) - result[out++] = '\n'; - result[out] = tob64((buffer[in] >> 2) & '\x3f'); - result[out+1] = tob64(((buffer[in] << 4) & '\x30') | ((buffer[in+1] >> 4) & '\x0f')); - result[out+2] = tob64(((buffer[in+1] << 2) & '\x3c') | ((buffer[in+2] >> 6) & '\x03')); - result[out+3] = tob64(buffer[in+2] & '\x3f'); - remain -= 3; - in += 3; - out += 4; - } - if (remain != 0) { - if (out % (width + 1) == width) - result[out++] = '\n'; - result[out] = tob64((buffer[in] >> 2) & '\x3f'); - if (remain == 1) { - result[out+1] = tob64((buffer[in] << 4) & '\x30'); - result[out+2] = '='; - } else { - result[out+1] = tob64(((buffer[in] << 4) & '\x30') | ((buffer[in+1] >> 4) & '\x0f')); - result[out+2] = tob64((buffer[in+1] << 2) & '\x3c'); - } - result[out+3] = '='; - out += 4; - } - result[out] = 0; - return result; -} - -char *base64enc(const char *buffer, int length) -{ - return base64encw(buffer, length, 76); -} - -static char fromb64(char x) -{ - if ('A' <= x && x <= 'Z') - return x - 'A'; - if ('a' <= x && x <= 'z') - return x - 'a' + 26; - if ('0' <= x && x <= '9') - return x - '0' + 52; - if (x == '+') - return 62; - if (x == '/') - return 63; - if (x == '=') - return '@'; - return 'E'; -} - -int base64dec(const char *buffer, char **output) -{ - int len, in, out; - char *result; - unsigned char x0, x1, x2, x3; - - len = strlen(buffer); - result = malloc(3 * ((3 + len) / 4)); - if (result == NULL) { - syslog(LOG_ERR, "malloc failed in base64dec"); - return -1; - } - in = out = 0; - while (buffer[in] == '\r' || buffer[in] == '\n') - in++; - while (buffer[in]) { - if (in + 4 > len) { - syslog(LOG_ERR, "unexpected input size in base64dec"); - free(result); - return -1; - } - x0 = (unsigned char)fromb64(buffer[in]); - x1 = (unsigned char)fromb64(buffer[in+1]); - x2 = (unsigned char)fromb64(buffer[in+2]); - x3 = (unsigned char)fromb64(buffer[in+3]); - in += 4; - if (x0 == 'E' || x1 == 'E' || x2 == 'E' || x3 == 'E') { - syslog(LOG_ERR, "unexpected input character in base64dec"); - free(result); - return -1; - } - if (x0 == '@' || x1 == '@' || (x2 == '@' && x3 != '@')) { - syslog(LOG_ERR, "unexpected termination character in base64dec"); - free(result); - return -1; - } - result[out] = (char)((x0 << 2) | (x1 >> 4)); - result[out+1] = (char)((x1 << 4) | ((x2 >> 2) & 15)); - result[out+2] = (char)((x2 << 6) | (x3 & 63)); - while (buffer[in] == '\r' || buffer[in] == '\n') - in++; - if (x3 != '@') - out += 3; - else if (!buffer[in]) - out += 1 + (x2 != '@'); - else { - syslog(LOG_ERR, "unexpected continuation in base64dec"); - free(result); - return -1; - } - } - *output = result; - return out; -} - -int base64eq(const char *buf1, const char *buf2) -{ - for(;;) { - while(*buf1 == '\n' || *buf1 == '\r') - buf1++; - while(*buf2 == '\n' || *buf2 == '\r') - buf2++; - if (*buf1 != *buf2) - return 0; - if (!*buf1) - return 1; - buf1++; - buf2++; - } -} - -#ifdef TESTBASE64 -#include <fcntl.h> -#include <string.h> - -int main(int ac, char **av) -{ - char buffer[32768]; - int fd, l0, l1, l2; - char *p1, *p2; - - while(*++av) { - fd = open(*av, O_RDONLY); - if (fd < 0) continue; - l0 = read(fd, buffer, sizeof buffer); - if (l0 <= 0) continue; - close(fd); - p1 = base64enc(buffer, l0); - if (!p1) continue; - l1 = strlen(p1); - l2 = base64dec(p1, &p2); - if (l2 <= 0) continue; -printf("[[[%.*s]]]\n",l2,p2); - if (l0 != l2) printf("length mismatch\n"); - else if (memcmp(buffer, p2, l0)) printf("content mismatch\n"); - free(p1); - free(p2); - } - return 0; -} - -#endif |