diff options
Diffstat (limited to 'src/SSL_Message.c')
| -rw-r--r-- | src/SSL_Message.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/src/SSL_Message.c b/src/SSL_Message.c index 86f9713..284c0a7 100644 --- a/src/SSL_Message.c +++ b/src/SSL_Message.c @@ -1,6 +1,7 @@ #include <stdio.h> #include <string.h> #include <stdlib.h> +#include <openssl/md5.h> #include "utstring.h" @@ -36,7 +37,6 @@ #define CERTIFICATE_HDRLEN 7 #define SSL_CERTIFICATE_HDRLEN 3 -extern int ja3_md5sum(const char *str, int len, char *buf, int size); extern struct ssl_serial_string g_astCipherSuit; const struct ssl_serial_string g_astCompression[] = @@ -56,6 +56,25 @@ const struct ssl_value2string ssl_version_list[] = { UNKNOWN_VERSION, NULL } }; +int ja3_md5sum(const char *str, int len, char *buf, int size) +{ + int n; + int ret = 0; + MD5_CTX ctx; + unsigned char tmp[MD5_DIGEST_LENGTH]; + + MD5_Init(&ctx); + MD5_Update(&ctx, str, len); + MD5_Final(tmp, &ctx); + + for (n = 0; n < MD5_DIGEST_LENGTH; n++) + { + ret += snprintf(buf + ret, size - ret, "%.2x", tmp[n]); + } + + return ret; +} + // https://tools.ietf.org/html/draft-davidben-tls-grease-00 static int ssl_is_grease_value(unsigned short val) { @@ -604,8 +623,8 @@ int ssl_parse_server_hello(struct ssl_server_hello *shello, unsigned char *paylo } ja3s_string[ja3s_string_offset]='\0'; - shello->ja3s.fingerprint_md5_len=ja3_md5sum(ja3s_string, ja3s_string_offset, shello->ja3s.fingerprint_md5, sizeof(shello->ja3s.fingerprint_md5)); - shello->ja3s.fingerprint_md5[shello->ja3s.fingerprint_md5_len]='\0'; + shello->ja3s.md5_len=ja3_md5sum(ja3s_string, ja3s_string_offset, shello->ja3s.md5, sizeof(shello->ja3s.md5)); + shello->ja3s.md5[shello->ja3s.md5_len]='\0'; return SSL_TRUE; } |