diff options
Diffstat (limited to 'node/Utils.cpp')
| -rw-r--r-- | node/Utils.cpp | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/node/Utils.cpp b/node/Utils.cpp index 31174ecc..cf5519cb 100644 --- a/node/Utils.cpp +++ b/node/Utils.cpp @@ -283,6 +283,37 @@ unsigned int Utils::unhex(const char *hex,void *buf,unsigned int len) return l; } +unsigned int Utils::unhex(const char *hex,unsigned int hexlen,void *buf,unsigned int len) + throw() +{ + int n = 1; + unsigned char c,b = 0; + unsigned int l = 0; + const char *const end = hex + hexlen; + + while (hex != end) { + c = (unsigned char)*(hex++); + if ((c >= 48)&&(c <= 57)) { // 0..9 + if ((n ^= 1)) { + if (l >= len) break; + ((unsigned char *)buf)[l++] = (b | (c - 48)); + } else b = (c - 48) << 4; + } else if ((c >= 65)&&(c <= 70)) { // A..F + if ((n ^= 1)) { + if (l >= len) break; + ((unsigned char *)buf)[l++] = (b | (c - (65 - 10))); + } else b = (c - (65 - 10)) << 4; + } else if ((c >= 97)&&(c <= 102)) { // a..f + if ((n ^= 1)) { + if (l >= len) break; + ((unsigned char *)buf)[l++] = (b | (c - (97 - 10))); + } else b = (c - (97 - 10)) << 4; + } + } + + return l; +} + void Utils::getSecureRandom(void *buf,unsigned int bytes) { static Mutex randomLock; |