* @num_bytes: Number of bytes to verify the integrity of.
* @chunk_size: Chunk size per SHA1 message digest.
* @sha1sums: Array of SHA1 message digests; 20 bytes each, one per chunk.
* @show_progress: Nonzero if the percent complete is to be printed after every
* chunk.
* @num_bytes: Number of bytes to verify the integrity of.
* @chunk_size: Chunk size per SHA1 message digest.
* @sha1sums: Array of SHA1 message digests; 20 bytes each, one per chunk.
* @show_progress: Nonzero if the percent complete is to be printed after every
* chunk.