Add support for calculating hashes with watchdog triggering
Implement watchodg-aware variants of hash calculation functions:
- crc32_wd()
- md5_wd()
- sha1_csum_wd()
The above functions calculate the hash of the input buffer in chunks,
triggering the watchdog after processing each chunk. The chunk size
is given as a function call parameter.
Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
diff --git a/include/common.h b/include/common.h
index fa1d052..0ac1f80 100644
--- a/include/common.h
+++ b/include/common.h
@@ -605,6 +605,7 @@
/* lib_generic/crc32.c */
uint32_t crc32 (uint32_t, const unsigned char *, uint);
+uint32_t crc32_wd (uint32_t, const unsigned char *, uint, uint);
uint32_t crc32_no_comp (uint32_t, const unsigned char *, uint);
/* common/console.c */
diff --git a/include/sha1.h b/include/sha1.h
index 15ea13c..734d1fb 100644
--- a/include/sha1.h
+++ b/include/sha1.h
@@ -80,6 +80,17 @@
unsigned char output[20] );
/**
+ * \brief Output = SHA-1( input buffer ), with watchdog triggering
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output SHA-1 checksum result
+ * \param chunk_sz watchdog triggering period (in bytes of input processed)
+ */
+void sha1_csum_wd (unsigned char *input, int ilen,
+ unsigned char output[20], unsigned int chunk_sz);
+
+/**
* \brief Output = SHA-1( file contents )
*
* \param path input file name
diff --git a/include/u-boot/md5.h b/include/u-boot/md5.h
index 046d1ee..8b44a7f 100644
--- a/include/u-boot/md5.h
+++ b/include/u-boot/md5.h
@@ -20,4 +20,12 @@
*/
void md5 (unsigned char *input, int len, unsigned char output[16]);
+/*
+ * Calculate and store in 'output' the MD5 digest of 'len' bytes at 'input'.
+ * 'output' must have enough space to hold 16 bytes. If 'chunk' Trigger the
+ * watchdog every 'chunk_sz' bytes of input processed.
+ */
+void md5_wd (unsigned char *input, int len, unsigned char output[16],
+ unsigned int chunk_sz);
+
#endif /* _MD5_H */
