src/util/md5.h

   1 #ifndef EL__UTIL_MD5_H
   2 #define EL__UTIL_MD5_H
   3
   4 /* Optionally MD5 support can depend on external implementation when linking
   5  * against a SSL library that supports it. */
   6 #ifndef CONFIG_MD5
   7 #if defined(CONFIG_OPENSSL)
   8 #include <openssl/md5.h>
   9 #elif defined(CONFIG_GNUTLS_OPENSSL_COMPAT)
  10 #include <gnutls/openssl.h>
  11 #endif
  12 #endif
  13
  14 /* GNU TLS doesn't define this */
  15 #ifndef MD5_DIGEST_LENGTH
  16 #define MD5_DIGEST_LENGTH 16
  17 #endif
  18
  19 #define MD5_HEX_DIGEST_LENGTH (MD5_DIGEST_LENGTH * 2)
  20
  21 typedef unsigned char md5_digest_bin_T[MD5_DIGEST_LENGTH];
  22 typedef unsigned char md5_digest_hex_T[MD5_HEX_DIGEST_LENGTH];
  23
  24 struct md5_context {
  25         uint32_t buf[4];
  26         uint32_t bits[2];
  27         unsigned char in[64];
  28 };
  29
  30 /* The interface for digesting several chunks of data. To compute the message
  31  * digest of a chunk of bytes, declare an md5_context structure, pass it to
  32  * init_md5(), call update_md5() as needed on buffers full of bytes, and then
  33  * call done_md5(), which will fill a supplied 16-byte array with the digest. */
  34 void init_md5(struct md5_context *context);
  35 void update_md5(struct md5_context *context, const unsigned char *data, unsigned long length);
  36 void done_md5(struct md5_context *context, md5_digest_bin_T digest);
  37
  38 /* Digest the passed @data with the given length and stores the MD5 digest in
  39  * the @digest parameter. */
  40 unsigned char *
  41 digest_md5(const unsigned char *data, unsigned long length, md5_digest_bin_T digest);
  42
  43 #ifdef CONFIG_MD5
  44 /* Provide compatibility with the OpenSSL interface: */
  45
  46 typedef struct md5_context MD5_CTX;
  47 #define MD5_Init(context)               init_md5(context)
  48 #define MD5_Update(context, data, len)  update_md5(context, data, len)
  49 #define MD5_Final(md5, context)         done_md5(context, md5)
  50 #define MD5(data, len, md5)             digest_md5(data, len, md5)
  51
  52 #endif /* CONFIG_MD5 */
  53
  54 #endif