03532efdc331b598d3dedc8cc7477641c3b0dd12vboxsync/* Initialize SHA1 computation. Returns NULL on error. */
03532efdc331b598d3dedc8cc7477641c3b0dd12vboxsync * Add some data to be hashed. ctx is the value returned by x_sha1_init()
03532efdc331b598d3dedc8cc7477641c3b0dd12vboxsync * Returns 0 on error, 1 on success.
03532efdc331b598d3dedc8cc7477641c3b0dd12vboxsync * Place the hash in result, and free ctx.
03532efdc331b598d3dedc8cc7477641c3b0dd12vboxsync * Returns 0 on error, 1 on success.
03532efdc331b598d3dedc8cc7477641c3b0dd12vboxsyncint x_sha1_final(void *ctx, unsigned char result[20]);