cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* Initialize SHA1 computation. Returns NULL on error. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Add some data to be hashed. ctx is the value returned by x_sha1_init()
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Returns 0 on error, 1 on success.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Place the hash in result, and free ctx.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Returns 0 on error, 1 on success.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncint x_sha1_final(void *ctx, unsigned char result[20]);