-#include "logger.h"
-#include "rsa.h"
-
-// Base64 decoding table
-
-static const uint8_t b64d[128] = {
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
- 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
- 0x3a, 0x3b, 0x3c, 0x3d, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
- 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
- 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
- 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12,
- 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
- 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
- 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24,
- 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a,
- 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
- 0x31, 0x32, 0x33, 0xff, 0xff, 0xff,
- 0xff, 0xff
-};
-
-// PEM encoding/decoding functions
-
-static bool pem_decode(FILE *fp, const char *header, uint8_t *buf, size_t size, size_t *outsize) {
- bool decode = false;
- char line[1024];
- uint16_t word = 0;
- int shift = 10;
- size_t i, j = 0;
-
- while(!feof(fp)) {
- if(!fgets(line, sizeof line, fp))
- return false;
-
- if(!decode && !strncmp(line, "-----BEGIN ", 11)) {
- if(!strncmp(line + 11, header, strlen(header)))
- decode = true;
- continue;
- }
-
- if(decode && !strncmp(line, "-----END", 8)) {
- break;
- }
-
- if(!decode)
- continue;
-
- for(i = 0; line[i] >= ' '; i++) {
- if((signed char)line[i] < 0 || b64d[(int)line[i]] == 0xff)
- break;
- word |= b64d[(int)line[i]] << shift;
- shift -= 6;
- if(shift <= 2) {
- if(j > size) {
- errno = ENOMEM;
- return false;
- }
-
- buf[j++] = word >> 8;
- word <<= 8;
- shift += 8;
- }
- }
- }
-
- if(outsize)
- *outsize = j;
- return true;
-}