diff options
Diffstat (limited to 'hash/ed2k.cpp')
-rw-r--r-- | hash/ed2k.cpp | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/hash/ed2k.cpp b/hash/ed2k.cpp new file mode 100644 index 0000000..92e7b15 --- /dev/null +++ b/hash/ed2k.cpp @@ -0,0 +1,41 @@ +#include "ed2k.h" + +template<class T> +inline T min(T a, T b) { + return (a > b) ? b : a; +} + +Ed2k::Ed2k() { + MD4_Init(&md4_partial); + MD4_Init(&md4_final); + size_total = 0; +} + +void Ed2k::update(const char* data, int length) { + while(length) { + if(!(size_total % (9500 * 1024)) && size_total) { + unsigned char digest[16]; + MD4_Final(digest, &md4_partial); + MD4_Update(&md4_final, digest, 16); + MD4_Init(&md4_partial); + } + int size = min<int>(length, (9500 * 1024) - (size_total % (9500 * 1024))); + MD4_Update(&md4_partial, data, size); + length -= size; + data += size; + size_total += size; + }; +} + +char* Ed2k::digest() { + char* digest = new char[16]; + if(size_total > (9500 * 1024)) { + unsigned char digest_partial[16]; + MD4_Final(digest_partial, &md4_partial); + MD4_Update(&md4_final, digest_partial, 16); + MD4_Final((unsigned char*)digest, &md4_final); + } else { + MD4_Final((unsigned char*)digest, &md4_partial); + } + return digest; +} |