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 #if defined(CONFIG_OWN_LIBC)
   7 #define CONFIG_MD5 1
   8 #elif defined(CONFIG_OPENSSL)
   9 #include <openssl/md5.h>
  10 #elif defined(CONFIG_GNUTLS_OPENSSL_COMPAT)
  11 #include <gnutls/openssl.h>
  12 #else
  13 #define CONFIG_MD5 1
  14 #endif
  15
  16 /* GNU TLS doesn't define this */
  17 #ifndef MD5_DIGEST_LENGTH
  18 #define MD5_DIGEST_LENGTH 16
  19 #endif
  20
  21 #define MD5_HEX_DIGEST_LENGTH (MD5_DIGEST_LENGTH * 2)
  22
  23 typedef unsigned char md5_digest_bin_T[MD5_DIGEST_LENGTH];
  24 typedef unsigned char md5_digest_hex_T[MD5_HEX_DIGEST_LENGTH];
  25
  26 struct md5_context {
  27         uint32_t buf[4];
  28         uint32_t bits[2];
  29         unsigned char in[64];
  30 };
  31
  32 /* The interface for digesting several chunks of data. To compute the message
  33  * digest of a chunk of bytes, declare an md5_context structure, pass it to
  34  * init_md5(), call update_md5() as needed on buffers full of bytes, and then
  35  * call done_md5(), which will fill a supplied 16-byte array with the digest. */
  36 void init_md5(struct md5_context *context);
  37 void update_md5(struct md5_context *context, const unsigned char *data, unsigned long length);
  38 void done_md5(struct md5_context *context, md5_digest_bin_T digest);
  39
  40 /** Digest the passed @a data with the given length and stores the MD5
  41  * digest in the @a digest parameter. */
  42 unsigned char *
  43 digest_md5(const unsigned char *data, unsigned long length, md5_digest_bin_T digest);
  44
  45 #ifdef CONFIG_MD5
  46 /** @name Provide compatibility with the OpenSSL interface:
  47  * @{ */
  48
  49 typedef struct md5_context MD5_CTX;
  50 #define MD5_Init(context)               init_md5(context)
  51 #define MD5_Update(context, data, len)  update_md5(context, data, len)
  52 #define MD5_Final(md5, context)         done_md5(context, md5)
  53 #define MD5(data, len, md5)             digest_md5(data, len, md5)
  54
  55 /** @} */
  56 #endif /* CONFIG_MD5 */
  57
  58 #endif